import { useState, useEffect } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import { Building2, Plus, MessageSquare, ShieldCheck, Activity, Loader2, X, RefreshCw, CheckCircle2, XCircle, AlertTriangle, Info } from 'lucide-react';
import { useTranslation } from 'react-i18next';
import { api } from '../lib/api';
import { useAuth } from '../lib/auth';
import { launchEmbeddedSignup } from '../lib/meta-signup';
import MetaVerificationGuide from '../components/MetaVerificationGuide';
import { useToast } from '../hooks/useToast';
import { logError, logWarn } from '../lib/logger';

interface Organization {
    id: string;
    name: string;
    mode: 'EDTECH' | 'CRM_MARKETING' | 'PEDAGOGY' | 'CUSTOMER_SERVICE';
    wabaId?: string;
    phoneNumbers?: { id: string; phoneNumber: string }[];
    subscriptionPlan?: 'STARTER' | 'GROWTH' | 'SCALE' | 'ENTERPRISE';
    subscriptionStatus?: string;
    isHardStopped?: boolean;
    personalityConfig?: {
        botName?: string;
        coreMission?: string;
        toneDescription?: string;
    };
}

interface MetaStatus {
    configured: boolean;
    wabaStatus?: 'APPROVED' | 'PENDING' | 'REJECTED' | 'BANNED' | 'UNKNOWN';
    businessId?: string;
    businessName?: string;
    businessVerified?: boolean;
    messagingLimitTier?: string;
    qualityRating?: 'GREEN' | 'YELLOW' | 'RED' | 'UNKNOWN';
    syncedAt?: string;
    error?: string;
    loading?: boolean;
}

interface PersonalityModalProps {
    org: Organization;
    onClose: () => void;
    onSave: (config: any) => void;
}

export default function ClientsManagementView() {
    const { t } = useTranslation();
    const toast = useToast();
    const { token, user } = useAuth();
    const isSuperAdmin = user?.role === 'SUPER_ADMIN';
    const [clients, setClients] = useState<Organization[]>([]);
    const [loading, setLoading] = useState(true);
    const [isModalOpen, setIsModalOpen] = useState(false);
    const [creditOrg, setCreditOrg] = useState<Organization | null>(null);
    const [creditAmount, setCreditAmount] = useState('');
    const [isSavingCredits, setIsSavingCredits] = useState(false);
    const [selectedOrgForPersonality, setSelectedOrgForPersonality] = useState<Organization | null>(null);
    const [newOrg, setNewOrg] = useState({
        name: '',
        slug: '',
        adminEmail: '',
        adminName: '',
        password: '',
        mode: 'PEDAGOGY' as 'CRM_MARKETING' | 'PEDAGOGY' | 'CUSTOMER_SERVICE',
        useCase: 'EDUCATION' as 'EDUCATION' | 'CRM_WHATSAPP'
    });
    const [isCreating, setIsCreating] = useState(false);
    const [createErrors, setCreateErrors] = useState<Record<string, string>>({});
    const [showGuide, setShowGuide] = useState(false);
    const [billingOrg, setBillingOrg] = useState<Organization | null>(null);
    const [billingPlan, setBillingPlan] = useState<string>('STARTER');
    const [isSavingPlan, setIsSavingPlan] = useState(false);
    const [metaStatuses, setMetaStatuses] = useState<Record<string, MetaStatus>>({});
    const [setupOrg, setSetupOrg] = useState<Organization | null>(null);
    const [directSetup, setDirectSetup] = useState({ wabaId: '', metaBusinessId: '', accessToken: '', phoneNumberId: '' });
    const [isDirectSetupSaving, setIsDirectSetupSaving] = useState(false);

    const fetchMetaStatus = async (orgId: string, force = false) => {
        setMetaStatuses(prev => ({ ...prev, [orgId]: { ...prev[orgId], configured: false, loading: true } }));
        try {
            const status = force
                ? await api.post(`/v1/organizations/${orgId}/meta-status/refresh`, {}, token!)
                : await api.get(`/v1/organizations/${orgId}/meta-status`, token!);
            setMetaStatuses(prev => ({ ...prev, [orgId]: { ...status, loading: false } }));
        } catch (err) {
            logWarn('[Clients] fetchMetaStatus failed', err);
            setMetaStatuses(prev => ({ ...prev, [orgId]: { configured: false, loading: false, error: t('common.error') } }));
        }
    };

    const fetchClients = async () => {
        if (!token) return;
        try {
            const data = await api.get('/v1/organizations', token);
            setClients(data);
            // Fetch Meta status for all orgs in parallel (non-blocking)
            data.forEach((org: Organization) => fetchMetaStatus(org.id));
        } catch (error) {
            logError("Failed to fetch organizations:", error);
        } finally {
            setLoading(false);
        }
    };

    useEffect(() => {
        fetchClients();
    }, [token]);

    const handleDirectSetupSubmit = async () => {
        if (!setupOrg || !directSetup.wabaId) return;
        setIsDirectSetupSaving(true);
        try {
            await api.post(`/v1/organizations/${setupOrg.id}/whatsapp-setup`, {
                wabaId: directSetup.wabaId,
                ...(directSetup.accessToken && { accessToken: directSetup.accessToken }),
                ...(directSetup.phoneNumberId && { phoneNumberId: directSetup.phoneNumberId }),
            }, token!);
            if (directSetup.metaBusinessId) {
                await api.put(`/v1/organizations/${setupOrg.id}`, { metaBusinessId: directSetup.metaBusinessId }, token!);
            }
            toast.success(t('clients.wa_setup_modal.success'));
            setSetupOrg(null);
            setDirectSetup({ wabaId: '', metaBusinessId: '', accessToken: '', phoneNumberId: '' });
            await fetchClients();
            setTimeout(() => fetchMetaStatus(setupOrg.id, true), 1000);
        } catch (err: any) {
            toast.error(`${t('clients.toast.error_prefix')}${err.message}`);
        } finally {
            setIsDirectSetupSaving(false);
        }
    };

    const handleCreateOrg = async (e: React.FormEvent) => {
        e.preventDefault();
        const errors: Record<string, string> = {};
        if (!newOrg.name.trim()) errors.name = t('clients.validation.name_required');
        if (!newOrg.slug.trim()) errors.slug = t('clients.validation.slug_required');
        else if (!/^[a-z0-9-]+$/.test(newOrg.slug)) errors.slug = t('clients.validation.slug_format');
        if (!newOrg.adminName.trim()) errors.adminName = t('clients.validation.admin_name_required');
        if (!newOrg.adminEmail.trim()) errors.adminEmail = t('clients.validation.email_required');
        else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(newOrg.adminEmail)) errors.adminEmail = t('clients.validation.email_invalid');
        if (!newOrg.password || newOrg.password.length < 8) errors.password = t('clients.validation.password_min');
        if (Object.keys(errors).length > 0) { setCreateErrors(errors); return; }
        setCreateErrors({});
        setIsCreating(true);
        try {
            await api.post('/v1/organizations', newOrg, token!);
            await fetchClients();
            setIsModalOpen(false);
            setNewOrg({ name: '', slug: '', adminEmail: '', adminName: '', password: '', mode: 'PEDAGOGY', useCase: 'EDUCATION' });
        } catch (error) {
            logError("Failed to create organization:", error);
            toast.error(t('clients.create_modal.error_create'));
        } finally {
            setIsCreating(false);
        }
    };


    const handleEmbeddedSignup = async (orgId: string) => {
        try {
            const result = await launchEmbeddedSignup();
            await api.post(`/v1/organizations/${orgId}/whatsapp-setup`, {
                wabaId: result.waba_id,
                accessToken: result.code,
                phoneNumberId: result.phone_number_id,
                phoneNumber: ''
            }, token!);
            toast.success(t('clients.toast.wa_connected'));
            fetchClients();
        } catch (error: any) {
            toast.error(`${t('clients.toast.error_prefix')}${error.message}`);
        }
    };

    if (loading) {
        return (
            <div className="flex flex-col items-center justify-center min-h-[60vh] text-slate-400">
                <Loader2 className="w-8 h-8 animate-spin mb-4" />
                <p className="font-medium">{t('clients.loading')}</p>
            </div>
        );
    }

    return (
        <div className="p-8 max-w-6xl mx-auto">
            <div className="flex items-center justify-between mb-8">
                <div>
                    <h1 className="text-3xl font-bold tracking-tight text-slate-900">{t('clients.page_title')}</h1>
                    <p className="text-slate-500 mt-2">{t('clients.page_subtitle')}</p>
                </div>
                <button
                    onClick={() => setIsModalOpen(true)}
                    className="flex items-center gap-2 bg-slate-900 text-white px-4 py-2 rounded-xl font-medium hover:bg-slate-800 transition shadow-sm"
                >
                    <Plus className="w-4 h-4" /> {t('clients.new_org_button')}
                </button>
            </div>

            <div className="grid gap-6">
                {clients.length === 0 ? (
                    <div className="text-center py-20 bg-slate-50 rounded-3xl border-2 border-dashed border-slate-200">
                        <Building2 className="w-12 h-12 text-slate-300 mx-auto mb-4" />
                        <h3 className="text-lg font-bold text-slate-900">{t('clients.no_clients_title')}</h3>
                        <p className="text-slate-500">{t('clients.no_clients_desc')}</p>
                    </div>
                ) : clients.map(client => (
                    <div key={client.id} className="bg-white rounded-2xl border border-slate-200 p-6 shadow-sm hover:shadow-md transition">
                        <div className="flex items-start justify-between">
                            <div className="flex gap-4">
                                <div className="w-12 h-12 bg-slate-100 rounded-2xl flex items-center justify-center">
                                    <Building2 className="w-6 h-6 text-slate-600" />
                                </div>
                                <div>
                                    <h3 className="text-xl font-bold text-slate-900">{client.name}</h3>
                                    <div className="flex items-center gap-3 mt-1">
                                        <span className={`text-xs px-2.5 py-0.5 rounded-full font-semibold ${
                                            client.phoneNumbers?.length ? 'bg-emerald-50 text-emerald-700' : 'bg-amber-50 text-amber-700'
                                        }`}>
                                            {client.phoneNumbers?.length ? t('clients.status.operational') : t('clients.status.config_required')}
                                        </span>
                                        <span className="text-xs text-slate-400">ID: {client.id}</span>
                                    </div>
                                </div>
                            </div>
                            <div className="flex gap-2">
                                {client.phoneNumbers?.length ? (
                                    <div className="flex items-center gap-4 text-sm">
                                        <div className="text-right">
                                            <p className="font-medium text-slate-700">{client.phoneNumbers[0].phoneNumber}</p>
                                            <p className="text-xs text-slate-400">ID: {client.phoneNumbers[0].id}</p>
                                        </div>
                                        <div className="h-10 w-px bg-slate-100"></div>
                                        {metaStatuses[client.id] && !metaStatuses[client.id].loading && !metaStatuses[client.id].configured ? (
                                            <button
                                                onClick={() => { setSetupOrg(client); setDirectSetup({ wabaId: '', metaBusinessId: '', accessToken: '', phoneNumberId: client.phoneNumbers?.[0]?.id || '' }); }}
                                                className="flex items-center gap-2 bg-amber-500 text-white px-4 py-2 rounded-xl font-semibold hover:bg-amber-600 transition text-xs"
                                            >
                                                <AlertTriangle className="w-3.5 h-3.5" /> {t('clients.actions.reconfigure_wa')}
                                            </button>
                                        ) : (
                                            <div className="flex items-center gap-2 text-emerald-600">
                                                <Activity className="w-4 h-4" />
                                                <span className="font-medium text-xs">{t('clients.status.online')}</span>
                                            </div>
                                        )}
                                    </div>
                                ) : (
                                    <div className="flex gap-2">
                                        <button
                                            onClick={() => handleEmbeddedSignup(client.id)}
                                            className="flex items-center gap-2 bg-indigo-600 text-white px-5 py-2.5 rounded-xl font-semibold hover:bg-indigo-700 transition shadow-lg shadow-indigo-100"
                                        >
                                            <MessageSquare className="w-4 h-4" /> {t('clients.actions.connect_wa')}
                                        </button>
                                        {isSuperAdmin && (
                                            <button
                                                onClick={() => { setSetupOrg(client); setDirectSetup({ wabaId: client.wabaId || '', metaBusinessId: '', accessToken: '', phoneNumberId: '' }); }}
                                                className="flex items-center gap-2 bg-slate-700 text-white px-4 py-2.5 rounded-xl font-semibold hover:bg-slate-800 transition text-xs"
                                                title={t('clients.actions.direct_setup')}
                                            >
                                                <ShieldCheck className="w-3.5 h-3.5" /> {t('clients.actions.direct_setup')}
                                            </button>
                                        )}
                                    </div>
                                )}
                                <button
                                    onClick={() => setSelectedOrgForPersonality(client)}
                                    className="flex items-center gap-2 bg-slate-100 text-slate-700 px-4 py-2.5 rounded-xl font-semibold hover:bg-slate-200 transition"
                                >
                                    <Activity className="w-4 h-4" /> {t('clients.actions.personality_studio')}
                                </button>
                            </div>
                        </div>

                        <div className="mt-8 pt-6 border-t border-slate-50 grid grid-cols-4 gap-6">
                            <MetaStatusCell
                                ms={metaStatuses[client.id]}
                                onRefresh={() => fetchMetaStatus(client.id, true)}
                                onGuide={() => setShowGuide(true)}
                            />
                            <BusinessVerificationCell ms={metaStatuses[client.id]} />
                            <DailyLimitCell ms={metaStatuses[client.id]} />
                            <div className="flex items-center justify-end gap-4">
                                {isSuperAdmin && (
                                    <button
                                        onClick={() => { setCreditOrg(client); setCreditAmount(''); }}
                                        className="text-sm font-bold text-emerald-600 hover:text-emerald-700 underline underline-offset-4"
                                    >
                                        {t('clients.actions.ai_credits')}
                                    </button>
                                )}
                                {client.isHardStopped && (
                                    <span className="text-[10px] font-bold bg-red-100 text-red-600 px-2 py-0.5 rounded-full">
                                        {t('clients.status.suspended')}
                                    </span>
                                )}
                                <button
                                    onClick={() => { setBillingOrg(client); setBillingPlan(client.subscriptionPlan ?? 'STARTER'); }}
                                    className="text-sm font-bold text-indigo-600 hover:text-indigo-700 underline underline-offset-4"
                                >
                                    {t('clients.actions.billing_details')}
                                </button>
                            </div>
                        </div>
                    </div>
                ))}
            </div>

            {/* Modal du Guide de Vérification */}
            {showGuide && (
                <div className="fixed inset-0 bg-slate-900/60 backdrop-blur-xl flex items-center justify-center p-6 z-[100] animate-in fade-in duration-300">
                    <div className="w-full max-w-5xl max-h-[90vh] overflow-y-auto">
                        <div className="relative">
                            <button
                                onClick={() => setShowGuide(false)}
                                className="absolute -top-4 -right-4 bg-white p-3 rounded-full shadow-xl hover:scale-110 transition z-[110]"
                            >
                                <X className="w-6 h-6 text-slate-900" />
                            </button>
                            <MetaVerificationGuide />
                        </div>
                    </div>
                </div>
            )}

            {/* Modal de création d'organisation */}
            {isModalOpen && (
                <div className="fixed inset-0 bg-slate-900/60 backdrop-blur-md flex items-end sm:items-center justify-center sm:p-4 z-50">
                    <div className="bg-white rounded-t-[2rem] sm:rounded-[2rem] shadow-2xl w-full sm:max-w-xl flex flex-col max-h-[90vh] animate-in zoom-in-95 duration-200">
                        {/* Fixed header */}
                        <div className="shrink-0 flex items-center justify-between px-8 pt-8 pb-5 border-b border-slate-100">
                            <h2 className="text-2xl font-black text-slate-900">{t('clients.create_modal.title')}</h2>
                            <button onClick={() => { setIsModalOpen(false); setCreateErrors({}); }} className="p-2 hover:bg-slate-100 rounded-full transition">
                                <X className="w-5 h-5 text-slate-400" />
                            </button>
                        </div>

                        {/* Scrollable body */}
                        <form onSubmit={handleCreateOrg} className="flex flex-col flex-1 min-h-0">
                            <div className="overflow-y-auto flex-1 px-8 py-6 space-y-6">
                                <div className="grid grid-cols-2 gap-4">
                                    <div className="col-span-2">
                                        <label className="block text-xs font-bold uppercase text-slate-400 mb-2">{t('clients.create_modal.company_name_label')} <span className="text-red-400">*</span></label>
                                        <input
                                            type="text"
                                            placeholder={t('clients.create_modal.company_name_placeholder')}
                                            value={newOrg.name}
                                            onChange={e => { setNewOrg({...newOrg, name: e.target.value}); setCreateErrors(p => ({...p, name: ''})); }}
                                            className={`w-full border rounded-xl px-4 py-3 outline-none focus:ring-2 transition ${createErrors.name ? 'border-red-400 focus:ring-red-200' : 'border-slate-200 focus:ring-slate-900'}`}
                                        />
                                        {createErrors.name && <p className="text-xs text-red-500 mt-1">{createErrors.name}</p>}
                                    </div>
                                    <div>
                                        <label className="block text-xs font-bold uppercase text-slate-400 mb-2">{t('clients.create_modal.slug_label')} <span className="text-red-400">*</span></label>
                                        <input
                                            type="text"
                                            placeholder={t('clients.create_modal.slug_placeholder')}
                                            value={newOrg.slug}
                                            onChange={e => { setNewOrg({...newOrg, slug: e.target.value.toLowerCase().replace(/\s+/g, '-')}); setCreateErrors(p => ({...p, slug: ''})); }}
                                            className={`w-full border rounded-xl px-4 py-3 outline-none focus:ring-2 transition font-mono text-sm ${createErrors.slug ? 'border-red-400 focus:ring-red-200' : 'border-slate-200 focus:ring-slate-900'}`}
                                        />
                                        {createErrors.slug && <p className="text-xs text-red-500 mt-1">{createErrors.slug}</p>}
                                    </div>
                                    <div>
                                        <label className="block text-xs font-bold uppercase text-slate-400 mb-2">{t('clients.create_modal.use_case_label')}</label>
                                        <select
                                            value={newOrg.mode}
                                            onChange={e => setNewOrg({...newOrg, mode: e.target.value as any})}
                                            className="w-full border border-slate-200 rounded-xl px-4 py-3 outline-none focus:ring-2 focus:ring-slate-900 transition bg-white"
                                        >
                                            <option value="CRM_MARKETING">{t('clients.create_modal.mode_crm')}</option>
                                            <option value="PEDAGOGY">{t('clients.create_modal.mode_pedagogy')}</option>
                                            <option value="CUSTOMER_SERVICE">{t('clients.create_modal.mode_service')}</option>
                                        </select>
                                    </div>
                                    <div className="col-span-2">
                                        <label className="block text-xs font-bold uppercase text-slate-400 mb-2">{t('clients.create_modal.workstream_label')}</label>
                                        <select
                                            value={newOrg.useCase}
                                            onChange={e => {
                                                const val = e.target.value as any;
                                                setNewOrg({
                                                    ...newOrg,
                                                    useCase: val,
                                                    mode: val === 'CRM_WHATSAPP' ? 'CRM_MARKETING' : 'PEDAGOGY'
                                                });
                                            }}
                                            className="w-full border border-slate-200 rounded-xl px-4 py-3 outline-none focus:ring-2 focus:ring-slate-900 transition bg-white"
                                        >
                                            <option value="EDUCATION">{t('clients.create_modal.use_case_education')}</option>
                                            <option value="CRM_WHATSAPP">{t('clients.create_modal.use_case_crm')}</option>
                                        </select>
                                    </div>
                                </div>

                                <div className="p-6 bg-slate-50 rounded-2xl border border-slate-100 space-y-4">
                                    <h4 className="text-xs font-bold text-slate-500 uppercase tracking-widest">{t('clients.create_modal.admin_section')}</h4>
                                    <div className="grid grid-cols-2 gap-4">
                                        <div>
                                            <label className="block text-xs font-bold text-slate-500 mb-1">{t('clients.create_modal.admin_name_label')} <span className="text-red-400">*</span></label>
                                            <input
                                                type="text"
                                                placeholder={t('clients.create_modal.admin_name_placeholder')}
                                                value={newOrg.adminName}
                                                onChange={e => { setNewOrg({...newOrg, adminName: e.target.value}); setCreateErrors(p => ({...p, adminName: ''})); }}
                                                className={`w-full border rounded-xl px-4 py-2 text-sm outline-none focus:ring-2 transition ${createErrors.adminName ? 'border-red-400 focus:ring-red-200' : 'border-slate-200 focus:ring-slate-900'}`}
                                            />
                                            {createErrors.adminName && <p className="text-xs text-red-500 mt-1">{createErrors.adminName}</p>}
                                        </div>
                                        <div>
                                            <label className="block text-xs font-bold text-slate-500 mb-1">{t('clients.create_modal.admin_email_label')} <span className="text-red-400">*</span></label>
                                            <input
                                                type="email"
                                                placeholder={t('clients.create_modal.admin_email_placeholder')}
                                                value={newOrg.adminEmail}
                                                onChange={e => { setNewOrg({...newOrg, adminEmail: e.target.value}); setCreateErrors(p => ({...p, adminEmail: ''})); }}
                                                className={`w-full border rounded-xl px-4 py-2 text-sm outline-none focus:ring-2 transition ${createErrors.adminEmail ? 'border-red-400 focus:ring-red-200' : 'border-slate-200 focus:ring-slate-900'}`}
                                            />
                                            {createErrors.adminEmail && <p className="text-xs text-red-500 mt-1">{createErrors.adminEmail}</p>}
                                        </div>
                                        <div className="col-span-2">
                                            <label className="block text-xs font-bold text-slate-500 mb-1">{t('clients.create_modal.password_label')} <span className="text-red-400">*</span></label>
                                            <input
                                                type="password"
                                                placeholder={t('clients.create_modal.password_placeholder')}
                                                value={newOrg.password}
                                                onChange={e => { setNewOrg({...newOrg, password: e.target.value}); setCreateErrors(p => ({...p, password: ''})); }}
                                                className={`w-full border rounded-xl px-4 py-2 text-sm outline-none focus:ring-2 transition ${createErrors.password ? 'border-red-400 focus:ring-red-200' : 'border-slate-200 focus:ring-slate-900'}`}
                                            />
                                            {createErrors.password && <p className="text-xs text-red-500 mt-1">{createErrors.password}</p>}
                                        </div>
                                    </div>
                                </div>
                            </div>

                            {/* Fixed footer */}
                            <div className="shrink-0 px-8 pb-8 pt-4 border-t border-slate-100">
                                <button
                                    type="submit"
                                    disabled={isCreating}
                                    className="w-full bg-slate-900 text-white py-4 rounded-2xl font-bold hover:bg-slate-800 transition disabled:opacity-50 flex items-center justify-center gap-2 shadow-xl shadow-slate-200"
                                >
                                    {isCreating ? <Loader2 className="w-4 h-4 animate-spin" /> : t('clients.create_modal.submit')}
                                </button>
                            </div>
                        </form>
                    </div>
                </div>
            )}

            {/* Billing Modal */}
            {billingOrg && (
                <div className="fixed inset-0 bg-slate-900/60 backdrop-blur-sm flex items-center justify-center p-6 z-[100]">
                    <div className="bg-white rounded-3xl shadow-2xl w-full max-w-lg">
                        <div className="flex items-center justify-between p-6 border-b border-slate-100">
                            <h2 className="text-xl font-bold text-slate-900">{t('clients.billing_modal.title')}</h2>
                            <button onClick={() => setBillingOrg(null)} className="p-2 hover:bg-slate-100 rounded-full transition">
                                <X className="w-5 h-5 text-slate-500" />
                            </button>
                        </div>
                        <div className="p-6 space-y-4">
                            <div className="flex items-center gap-3 bg-slate-50 rounded-2xl p-4">
                                <Building2 className="w-8 h-8 text-slate-400 shrink-0" />
                                <div>
                                    <p className="font-bold text-slate-900">{billingOrg.name}</p>
                                    <p className="text-xs text-slate-400 font-mono">{billingOrg.id}</p>
                                </div>
                            </div>
                            <div className="grid grid-cols-2 gap-3 text-sm">
                                <div className="bg-slate-50 rounded-2xl p-4">
                                    <p className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-1">{t('clients.billing_modal.mode_label')}</p>
                                    <p className="font-semibold text-slate-800">{billingOrg.mode}</p>
                                </div>
                                <div className="bg-slate-50 rounded-2xl p-4">
                                    <p className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-1">{t('clients.billing_modal.waba_status_label')}</p>
                                    <WabaStatusBadge ms={metaStatuses[billingOrg.id]} />
                                </div>
                                <div className="bg-slate-50 rounded-2xl p-4">
                                    <p className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-1">{t('clients.billing_modal.daily_limit_label')}</p>
                                    <BillingTierDisplay ms={metaStatuses[billingOrg.id]} />
                                </div>
                                <div className="bg-slate-50 rounded-2xl p-4">
                                    <p className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-1">{t('clients.billing_modal.meta_business_label')}</p>
                                    <BusinessBadge ms={metaStatuses[billingOrg.id]} />
                                </div>
                            </div>
                            {billingOrg.wabaId && (
                                <div className="bg-slate-50 rounded-2xl p-4 text-sm">
                                    <p className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-1">{t('clients.billing_modal.waba_id_label')}</p>
                                    <p className="font-mono text-slate-700">{billingOrg.wabaId}</p>
                                </div>
                            )}
                        </div>
                        <div className="px-6 pb-4">
                            <div className="bg-slate-50 rounded-2xl p-4">
                                <p className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-3">{t('clients.billing_modal.plan_label')}</p>
                                <select
                                    value={billingPlan}
                                    onChange={e => setBillingPlan(e.target.value)}
                                    className="w-full border border-slate-200 rounded-xl px-3 py-2.5 text-sm bg-white outline-none focus:ring-2 focus:ring-indigo-400 mb-3"
                                >
                                    <option value="STARTER">{t('clients.billing_modal.plan_starter')}</option>
                                    <option value="GROWTH">{t('clients.billing_modal.plan_growth')}</option>
                                    <option value="SCALE">{t('clients.billing_modal.plan_scale')}</option>
                                    <option value="ENTERPRISE">{t('clients.billing_modal.plan_enterprise')}</option>
                                </select>
                                <button
                                    disabled={isSavingPlan || billingPlan === (billingOrg?.subscriptionPlan ?? 'STARTER')}
                                    onClick={async () => {
                                        if (!billingOrg) return;
                                        setIsSavingPlan(true);
                                        try {
                                            await api.put(`/v1/organizations/${billingOrg.id}`, { subscriptionPlan: billingPlan }, token!);
                                            setBillingOrg({ ...billingOrg, subscriptionPlan: billingPlan as any });
                                            await fetchClients();
                                            toast.success(t('clients.billing_modal.plan_updated'));
                                        } catch (err: any) {
                                            toast.error(`${t('clients.toast.error_prefix')}${err.message}`);
                                        } finally {
                                            setIsSavingPlan(false);
                                        }
                                    }}
                                    className="w-full py-2.5 bg-indigo-600 hover:bg-indigo-700 disabled:opacity-40 text-white rounded-xl font-semibold text-sm transition flex items-center justify-center gap-2"
                                >
                                    {isSavingPlan ? <Loader2 className="w-4 h-4 animate-spin" /> : t('clients.billing_modal.apply_plan')}
                                </button>
                            </div>
                        </div>
                        <div className="p-6 border-t border-slate-100">
                            <button
                                onClick={() => setBillingOrg(null)}
                                className="w-full py-3 bg-slate-900 text-white rounded-2xl font-bold hover:bg-slate-700 transition"
                            >
                                {t('clients.billing_modal.close')}
                            </button>
                        </div>
                    </div>
                </div>
            )}

            {/* Super-admin: Credit Allocation Modal */}
            {creditOrg && isSuperAdmin && (
                <div className="fixed inset-0 bg-slate-900/60 backdrop-blur-md flex items-end sm:items-center justify-center sm:p-4 z-[110]">
                    <div className="bg-white rounded-t-[2rem] sm:rounded-[2rem] shadow-2xl w-full sm:max-w-md flex flex-col max-h-[90vh] animate-in zoom-in-95 duration-200">
                        <div className="shrink-0 flex items-center justify-between px-8 pt-8 pb-5 border-b border-slate-100">
                            <div>
                                <h2 className="text-xl font-black text-slate-900">{t('clients.credits_modal.title')}</h2>
                                <p className="text-sm text-slate-500 mt-0.5">{creditOrg.name}</p>
                            </div>
                            <button onClick={() => setCreditOrg(null)} className="p-2 hover:bg-slate-100 rounded-full transition">
                                <X className="w-5 h-5 text-slate-400" />
                            </button>
                        </div>

                        <div className="overflow-y-auto flex-1 px-8 py-6 space-y-5">
                            <div className="bg-slate-50 rounded-2xl p-4 flex items-center justify-between">
                                <span className="text-sm text-slate-500">{t('clients.credits_modal.current_balance')}</span>
                                <span className="text-base font-bold text-slate-900">
                                    {(creditOrg as any).walletBalance ?? '—'} {t('clients.credits_modal.credits_unit')}
                                </span>
                            </div>

                            <div>
                                <label className="block text-xs font-bold uppercase text-slate-400 mb-2">
                                    {t('clients.credits_modal.add_credits_label')}
                                </label>
                                <input
                                    type="number"
                                    min="1"
                                    value={creditAmount}
                                    onChange={e => setCreditAmount(e.target.value)}
                                    placeholder={t('clients.credits_modal.add_credits_placeholder')}
                                    className="w-full border border-slate-200 rounded-xl px-4 py-3 outline-none focus:ring-2 focus:ring-emerald-500/20 focus:border-emerald-500 transition font-mono text-lg"
                                />
                                <p className="text-xs text-slate-400 mt-1.5">{t('clients.credits_modal.rate_hint')}</p>
                            </div>
                        </div>

                        <div className="shrink-0 px-8 pb-8 pt-4 border-t border-slate-100">
                            <button
                                type="button"
                                disabled={isSavingCredits || !creditAmount || Number(creditAmount) <= 0}
                                onClick={async () => {
                                    if (!creditAmount || Number(creditAmount) <= 0) return;
                                    setIsSavingCredits(true);
                                    try {
                                        const data = await api.post('/v1/billing/admin/allocate', { organizationId: creditOrg.id, amount: Number(creditAmount) }, token!);
                                        toast.success(`${creditAmount} ${t('clients.credits_modal.credits_unit')} → ${data.newBalance}`);
                                        setCreditOrg(null);
                                        setCreditAmount('');
                                    } catch {
                                        toast.error(t('clients.credits_modal.error'));
                                    } finally {
                                        setIsSavingCredits(false);
                                    }
                                }}
                                className="w-full bg-emerald-600 text-white py-4 rounded-2xl font-bold hover:bg-emerald-700 transition disabled:opacity-50 flex items-center justify-center gap-2"
                            >
                                {isSavingCredits ? <Loader2 className="w-4 h-4 animate-spin" /> : t('clients.credits_modal.submit')}
                            </button>
                        </div>
                    </div>
                </div>
            )}

            {/* Personality Studio Modal */}
            {selectedOrgForPersonality && (
                <PersonalityStudioModal
                    org={selectedOrgForPersonality}
                    onClose={() => setSelectedOrgForPersonality(null)}
                    onSave={async (config) => {
                        try {
                            await api.patch(`/v1/organizations/${selectedOrgForPersonality.id}/personality`, config, token!);
                            toast.success(t('clients.personality_modal.success'));
                            fetchClients();
                            setSelectedOrgForPersonality(null);
                        } catch (err: any) {
                            toast.error(`${t('clients.toast.error_prefix')}${err.message}`);
                        }
                    }}
                />
            )}

            {/* WhatsApp Setup Modal */}
            {setupOrg && (
                <div className="fixed inset-0 bg-slate-900/60 backdrop-blur-md flex items-center justify-center p-4 z-50">
                    <div className="bg-white rounded-3xl shadow-2xl w-full max-w-lg p-8 animate-in zoom-in-95 duration-200">
                        <div className="flex items-center justify-between mb-6">
                            <div>
                                <h2 className="text-xl font-black text-slate-900">{t('clients.wa_setup_modal.title')}</h2>
                                <p className="text-sm text-slate-500 mt-0.5">{setupOrg.name}</p>
                            </div>
                            <button onClick={() => setSetupOrg(null)} className="p-2 hover:bg-slate-100 rounded-full transition">
                                <X className="w-5 h-5 text-slate-400" />
                            </button>
                        </div>

                        {/* Option A — Direct (account déjà sur Meta) */}
                        <div className="border border-indigo-100 bg-indigo-50/40 rounded-2xl p-5 mb-4">
                            <p className="text-xs font-bold uppercase tracking-wider text-indigo-500 mb-3">{t('clients.wa_setup_modal.already_on_meta')}</p>
                            <div className="space-y-3">
                                <div>
                                    <label className="block text-xs font-bold text-slate-500 mb-1">{t('clients.wa_setup_modal.waba_id_label')} <span className="text-red-400">*</span></label>
                                    <input
                                        type="text"
                                        placeholder={t('clients.wa_setup_modal.waba_id_placeholder')}
                                        value={directSetup.wabaId}
                                        onChange={e => setDirectSetup(s => ({ ...s, wabaId: e.target.value }))}
                                        className="w-full border border-slate-200 rounded-xl px-3 py-2.5 text-sm font-mono outline-none focus:ring-2 focus:ring-indigo-500/20 focus:border-indigo-400"
                                    />
                                    <p className="text-[10px] text-slate-400 mt-1">
                                        <a href="https://business.facebook.com/settings/whatsapp-business-accounts" target="_blank" rel="noreferrer" className="text-indigo-500 underline">{t('clients.wa_setup_modal.waba_id_hint_link')}</a>
                                    </p>
                                </div>
                                <div>
                                    <label className="block text-xs font-bold text-slate-500 mb-1">{t('clients.wa_setup_modal.business_id_label')} <span className="text-slate-300">{t('clients.wa_setup_modal.business_id_optional')}</span></label>
                                    <input
                                        type="text"
                                        placeholder={t('clients.wa_setup_modal.business_id_placeholder')}
                                        value={directSetup.metaBusinessId}
                                        onChange={e => setDirectSetup(s => ({ ...s, metaBusinessId: e.target.value }))}
                                        className="w-full border border-slate-200 rounded-xl px-3 py-2.5 text-sm font-mono outline-none focus:ring-2 focus:ring-indigo-500/20 focus:border-indigo-400"
                                    />
                                    <p className="text-[10px] text-slate-400 mt-1">
                                        <a href="https://business.facebook.com/settings/info" target="_blank" rel="noreferrer" className="text-indigo-500 underline">{t('clients.wa_setup_modal.business_id_hint_link')}</a>
                                    </p>
                                </div>
                                <div>
                                    <label className="block text-xs font-bold text-slate-500 mb-1">{t('clients.wa_setup_modal.token_label')} <span className="text-slate-300">{t('clients.wa_setup_modal.token_optional')}</span></label>
                                    <input
                                        type="password"
                                        placeholder={t('clients.wa_setup_modal.token_placeholder')}
                                        value={directSetup.accessToken}
                                        onChange={e => setDirectSetup(s => ({ ...s, accessToken: e.target.value }))}
                                        className="w-full border border-slate-200 rounded-xl px-3 py-2.5 text-sm font-mono outline-none focus:ring-2 focus:ring-indigo-500/20 focus:border-indigo-400"
                                    />
                                    <p className="text-[10px] text-slate-400 mt-1">
                                        <a href="https://business.facebook.com/settings/system-users" target="_blank" rel="noreferrer" className="text-indigo-500 underline">{t('clients.wa_setup_modal.token_hint_link')}</a>
                                    </p>
                                </div>
                                {directSetup.phoneNumberId && (
                                    <p className="text-xs text-slate-400">{t('clients.wa_setup_modal.phone_number_detected')} <span className="font-mono text-slate-600">{directSetup.phoneNumberId}</span></p>
                                )}
                            </div>
                            <button
                                onClick={handleDirectSetupSubmit}
                                disabled={!directSetup.wabaId || isDirectSetupSaving}
                                className="mt-4 w-full bg-indigo-600 hover:bg-indigo-700 disabled:opacity-40 text-white py-3 rounded-xl font-bold text-sm transition flex items-center justify-center gap-2"
                            >
                                {isDirectSetupSaving ? <Loader2 className="w-4 h-4 animate-spin" /> : <CheckCircle2 className="w-4 h-4" />}
                                {t('clients.wa_setup_modal.save_config')}
                            </button>
                        </div>

                        {/* Option B — Embedded Signup (nouveaux clients) */}
                        <div className="border border-slate-100 rounded-2xl p-5">
                            <p className="text-xs font-bold uppercase tracking-wider text-slate-400 mb-3">{t('clients.wa_setup_modal.new_account_heading')}</p>
                            <p className="text-xs text-slate-500 mb-3">{t('clients.wa_setup_modal.new_account_desc')}</p>
                            <button
                                onClick={() => { setSetupOrg(null); handleEmbeddedSignup(setupOrg.id); }}
                                className="w-full border border-slate-200 hover:bg-slate-50 text-slate-700 py-3 rounded-xl font-semibold text-sm transition flex items-center justify-center gap-2"
                            >
                                <svg className="w-4 h-4" viewBox="0 0 24 24" fill="#1877F2"><path d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669 1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z"/></svg>
                                {t('clients.wa_setup_modal.connect_facebook')}
                            </button>
                        </div>
                    </div>
                </div>
            )}

            {/* Meta Compliance Footer */}
            <div className="mt-12 p-6 bg-slate-50 rounded-2xl border border-slate-100">
                <h4 className="text-xs font-bold text-slate-400 uppercase tracking-widest mb-4">{t('clients.tier.meta_compliance')}</h4>
                <div className="flex gap-8 opacity-60 grayscale hover:grayscale-0 transition duration-500">
                    <img src="https://upload.wikimedia.org/wikipedia/commons/b/be/Facebook_Messenger_logo_2020.svg" className="h-6" alt="Meta" />
                    <img src="https://upload.wikimedia.org/wikipedia/commons/6/6b/WhatsApp.svg" className="h-6" alt="WhatsApp" />
                </div>
            </div>
        </div>
    );
}

// ─── Meta status helpers ──────────────────────────────────────────────────────

function dailyLimitLabel(ms: MetaStatus | undefined, t: (key: string) => string): string {
    if (!ms || ms.loading) return '…';
    if (!ms.configured) return '—';
    const tierMap: Record<string, string> = {
        TIER_50:   t('clients.tier.tier_50'),
        TIER_250:  t('clients.tier.tier_250'),
        TIER_1K:   t('clients.tier.tier_1k'),
        TIER_10K:  t('clients.tier.tier_10k'),
        TIER_100K: t('clients.tier.tier_100k'),
        UNLIMITED: t('clients.tier.unlimited'),
    };
    if (ms.messagingLimitTier) return tierMap[ms.messagingLimitTier] ?? ms.messagingLimitTier;
    return '—';
}

function WabaStatusBadge({ ms }: { ms?: MetaStatus }) {
    const { t } = useTranslation();
    if (!ms || ms.loading) return <span className="text-slate-400 text-xs animate-pulse">{t('clients.waba.checking')}</span>;
    if (!ms.configured) return <span className="text-slate-400 font-medium text-xs">{t('clients.waba.not_connected')}</span>;
    const map: Record<string, { labelKey: string; cls: string }> = {
        APPROVED: { labelKey: 'clients.waba.approved', cls: 'text-emerald-600' },
        PENDING:  { labelKey: 'clients.waba.pending',  cls: 'text-amber-600' },
        REJECTED: { labelKey: 'clients.waba.rejected', cls: 'text-red-600' },
        BANNED:   { labelKey: 'clients.waba.banned',   cls: 'text-red-600' },
        UNKNOWN:  { labelKey: 'clients.waba.unknown',  cls: 'text-slate-500' },
    };
    const s = map[ms.wabaStatus ?? 'UNKNOWN'] ?? map.UNKNOWN;
    return <span className={`font-semibold text-sm ${s.cls}`}>{t(s.labelKey)}</span>;
}

function BusinessBadge({ ms }: { ms?: MetaStatus }) {
    const { t } = useTranslation();
    if (!ms || ms.loading) return <span className="text-slate-400 text-xs animate-pulse">{t('clients.waba.checking')}</span>;
    if (!ms.configured || ms.businessId === undefined) return <span className="text-slate-400 font-medium text-xs">—</span>;
    return ms.businessVerified
        ? <span className="font-semibold text-sm text-emerald-600">{t('clients.waba.verified')}</span>
        : <span className="font-semibold text-sm text-amber-600">{t('clients.waba.not_verified')}</span>;
}

function MetaStatusCell({ ms, onRefresh, onGuide }: { ms?: MetaStatus; onRefresh: () => void; onGuide: () => void }) {
    const { t } = useTranslation();
    const isApproved = ms?.wabaStatus === 'APPROVED';
    const isLoading  = !ms || ms.loading;
    return (
        <div className="flex items-center gap-3">
            <div className={`p-2 rounded-lg ${isLoading ? 'bg-slate-50' : isApproved ? 'bg-emerald-50' : 'bg-amber-50'}`}>
                {isLoading
                    ? <ShieldCheck className="w-4 h-4 text-slate-300 animate-pulse" />
                    : isApproved
                        ? <CheckCircle2 className="w-4 h-4 text-emerald-500" />
                        : <AlertTriangle className="w-4 h-4 text-amber-500" />}
            </div>
            <div className="min-w-0">
                <div className="flex items-center gap-1.5">
                    <p className="text-[10px] uppercase font-bold text-slate-400 tracking-wider">{t('clients.cells.waba_header')}</p>
                    <button onClick={onRefresh} title={t('clients.waba.refresh_tooltip')} className="text-slate-300 hover:text-slate-500 transition">
                        <RefreshCw className="w-3 h-3" />
                    </button>
                </div>
                <div className="flex items-center gap-2 flex-wrap">
                    <WabaStatusBadge ms={ms} />
                    {ms && !isLoading && !isApproved && ms.configured && (
                        <button onClick={onGuide} className="text-[10px] text-indigo-600 hover:underline font-bold whitespace-nowrap">
                            {t('clients.waba.what_to_do')}
                        </button>
                    )}
                </div>
                {ms?.error && <p className="text-[10px] text-red-400 truncate">{ms.error}</p>}
            </div>
        </div>
    );
}

function BusinessVerificationCell({ ms }: { ms?: MetaStatus }) {
    const { t } = useTranslation();
    const isLoading = !ms || ms.loading;
    return (
        <div className="flex items-center gap-3">
            <div className={`p-2 rounded-lg ${isLoading ? 'bg-slate-50' : ms?.businessVerified ? 'bg-emerald-50' : ms?.businessId !== undefined ? 'bg-amber-50' : 'bg-slate-50'}`}>
                {isLoading
                    ? <ShieldCheck className="w-4 h-4 text-slate-300 animate-pulse" />
                    : ms?.businessVerified
                        ? <CheckCircle2 className="w-4 h-4 text-emerald-500" />
                        : ms?.businessId !== undefined
                            ? <XCircle className="w-4 h-4 text-amber-500" />
                            : <ShieldCheck className="w-4 h-4 text-slate-300" />}
            </div>
            <div>
                <p className="text-[10px] uppercase font-bold text-slate-400 tracking-wider">{t('clients.cells.business_header')}</p>
                <div className="flex items-center gap-2">
                    <BusinessBadge ms={ms} />
                    {ms && !isLoading && ms.configured && ms.businessId !== undefined && !ms.businessVerified && (
                        <a
                            href="https://business.facebook.com/settings/security"
                            target="_blank" rel="noreferrer"
                            className="text-[10px] text-indigo-600 hover:underline font-bold whitespace-nowrap"
                        >
                            {t('clients.waba.verify_link')}
                        </a>
                    )}
                </div>
            </div>
        </div>
    );
}

function QualityDot({ rating }: { rating?: string }) {
    const { t } = useTranslation();
    const map: Record<string, string> = {
        GREEN:   'bg-emerald-400',
        YELLOW:  'bg-amber-400',
        RED:     'bg-red-400',
        UNKNOWN: 'bg-slate-300',
    };
    const cls = map[rating ?? 'UNKNOWN'] ?? 'bg-slate-300';
    return <span className={`inline-block w-2 h-2 rounded-full ${cls}`} title={`${t('clients.quality.dot_title')}${rating ?? '—'}`} />;
}

const TIER_CONFIG: Record<string, { textCls: string; bgCls: string; iconCls: string; dotCls: string; order: number }> = {
    TIER_50:    { textCls: 'text-red-600',     bgCls: 'bg-red-50',     iconCls: 'text-red-400',     dotCls: 'bg-red-400',     order: 0 },
    TIER_250:   { textCls: 'text-amber-600',   bgCls: 'bg-amber-50',   iconCls: 'text-amber-400',   dotCls: 'bg-amber-400',   order: 1 },
    TIER_1K:    { textCls: 'text-blue-600',    bgCls: 'bg-blue-50',    iconCls: 'text-blue-400',    dotCls: 'bg-blue-400',    order: 2 },
    TIER_10K:   { textCls: 'text-emerald-600', bgCls: 'bg-emerald-50', iconCls: 'text-emerald-400', dotCls: 'bg-emerald-400', order: 3 },
    TIER_100K:  { textCls: 'text-emerald-600', bgCls: 'bg-emerald-50', iconCls: 'text-emerald-400', dotCls: 'bg-emerald-400', order: 4 },
    UNLIMITED:  { textCls: 'text-emerald-600', bgCls: 'bg-emerald-50', iconCls: 'text-emerald-400', dotCls: 'bg-emerald-400', order: 5 },
};

function BillingTierDisplay({ ms }: { ms?: MetaStatus }) {
    const { t } = useTranslation();
    const [showInfo, setShowInfo] = useState(false);
    const tierCfg = TIER_CONFIG[ms?.messagingLimitTier ?? ''];
    return (
        <>
            <div className="flex items-center gap-1.5">
                <span className={`font-semibold ${tierCfg?.textCls ?? 'text-slate-800'}`}>{dailyLimitLabel(ms, t)}</span>
                {ms?.qualityRating && <QualityDot rating={ms.qualityRating} />}
                {ms?.configured && (
                    <button onClick={() => setShowInfo(true)} title={t('clients.cells.daily_limit_info_tooltip')} className="text-slate-300 hover:text-indigo-500 transition">
                        <Info className="w-3.5 h-3.5" />
                    </button>
                )}
            </div>
            <TierInfoModal ms={ms} open={showInfo} onClose={() => setShowInfo(false)} />
        </>
    );
}

function TierInfoModal({ ms, open, onClose }: { ms?: MetaStatus; open: boolean; onClose: () => void }) {
    const { t } = useTranslation();
    const currentTierOrder = TIER_CONFIG[ms?.messagingLimitTier ?? '']?.order ?? -1;

    const TIERS_IN_ORDER = [
        { key: 'TIER_50',   labelKey: 'clients.tier.tier_50',   descKey: 'clients.tier_modal.tier_50_desc' },
        { key: 'TIER_250',  labelKey: 'clients.tier.tier_250',  descKey: 'clients.tier_modal.tier_250_desc' },
        { key: 'TIER_1K',   labelKey: 'clients.tier.tier_1k',   descKey: 'clients.tier_modal.tier_1k_desc' },
        { key: 'TIER_10K',  labelKey: 'clients.tier.tier_10k',  descKey: 'clients.tier_modal.tier_10k_desc' },
        { key: 'TIER_100K', labelKey: 'clients.tier.tier_100k', descKey: 'clients.tier_modal.tier_100k_desc' },
        { key: 'UNLIMITED', labelKey: 'clients.tier.unlimited',  descKey: 'clients.tier_modal.unlimited_desc' },
    ];

    const QUALITY_INFO = {
        GREEN:  { dotCls: 'bg-emerald-400', ringCls: 'ring-emerald-300 bg-emerald-50', labelKey: 'clients.quality.good_label',   descKey: 'clients.quality.good_desc' },
        YELLOW: { dotCls: 'bg-amber-400',   ringCls: 'ring-amber-300 bg-amber-50',     labelKey: 'clients.quality.medium_label', descKey: 'clients.quality.medium_desc' },
        RED:    { dotCls: 'bg-red-400',     ringCls: 'ring-red-300 bg-red-50',         labelKey: 'clients.quality.risky_label',  descKey: 'clients.quality.risky_desc' },
    };

    useEffect(() => {
        if (!open) return;
        const onKey = (e: KeyboardEvent) => { if (e.key === 'Escape') onClose(); };
        document.addEventListener('keydown', onKey);
        document.body.style.overflow = 'hidden';
        return () => {
            document.removeEventListener('keydown', onKey);
            document.body.style.overflow = '';
        };
    }, [open, onClose]);

    return (
        <AnimatePresence>
            {open && (
                <motion.div
                    className="fixed inset-0 z-[200] flex items-end sm:items-center justify-center sm:p-4"
                    initial={{ opacity: 0 }}
                    animate={{ opacity: 1 }}
                    exit={{ opacity: 0 }}
                    transition={{ duration: 0.2 }}
                    onClick={onClose}
                >
                    {/* Backdrop */}
                    <div className="absolute inset-0 bg-slate-900/50 backdrop-blur-sm" />

                    {/* Panel — bottom sheet on mobile, centered card on desktop */}
                    <motion.div
                        className="relative bg-white w-full sm:max-w-md sm:rounded-2xl rounded-t-3xl shadow-2xl flex flex-col"
                        style={{ maxHeight: '85dvh' }}
                        initial={{ y: '100%' }}
                        animate={{ y: 0 }}
                        exit={{ y: '100%' }}
                        transition={{ type: 'spring', damping: 32, stiffness: 320, mass: 0.8 }}
                        onClick={e => e.stopPropagation()}
                    >
                        {/* Drag handle — mobile only */}
                        <div className="flex justify-center pt-3 pb-0 sm:hidden shrink-0">
                            <div className="w-9 h-1 bg-slate-200 rounded-full" />
                        </div>

                        {/* Sticky header */}
                        <div className="flex items-center justify-between px-6 pt-4 pb-3 sm:pt-6 shrink-0">
                            <h3 className="font-bold text-slate-900 text-base">{t('clients.tier_modal.title')}</h3>
                            <button onClick={onClose} className="p-1.5 hover:bg-slate-100 rounded-lg transition -mr-1">
                                <X className="w-4 h-4 text-slate-500" />
                            </button>
                        </div>

                        {/* Scrollable body */}
                        <div className="overflow-y-auto overscroll-contain px-6 pb-8 space-y-5">

                            {/* Tier ladder */}
                            <div className="space-y-1.5">
                                <p className="text-[10px] font-bold text-slate-400 uppercase tracking-wider mb-2">{t('clients.tier_modal.levels_heading')}</p>
                                {TIERS_IN_ORDER.map(({ key, labelKey, descKey }, i) => {
                                    const isCurrent = key === ms?.messagingLimitTier;
                                    const isPast    = i < currentTierOrder;
                                    const cfg       = TIER_CONFIG[key];
                                    return (
                                        <div key={key} className={`flex items-start gap-3 p-3 rounded-xl transition-all ${
                                            isCurrent ? 'ring-2 ring-indigo-200 bg-indigo-50' : isPast ? 'opacity-30' : 'opacity-50'
                                        }`}>
                                            <span className={`w-2 h-2 rounded-full mt-1.5 shrink-0 ${isCurrent ? (cfg?.dotCls ?? 'bg-indigo-400') : 'bg-slate-300'}`} />
                                            <div className="flex-1 min-w-0">
                                                <div className="flex items-center gap-2 flex-wrap">
                                                    <span className={`text-sm font-semibold ${isCurrent ? cfg?.textCls : 'text-slate-500'}`}>{t(labelKey)}</span>
                                                    {isCurrent && <span className="text-[10px] font-bold bg-indigo-100 text-indigo-600 px-2 py-0.5 rounded-full">{t('clients.tier_modal.current_badge')}</span>}
                                                </div>
                                                <p className="text-[11px] text-slate-400 mt-0.5 leading-snug">{t(descKey)}</p>
                                            </div>
                                        </div>
                                    );
                                })}
                            </div>

                            {/* Quality rating */}
                            {ms?.qualityRating && ms.qualityRating !== 'UNKNOWN' && (
                                <div className="space-y-2">
                                    <p className="text-[10px] font-bold text-slate-400 uppercase tracking-wider">{t('clients.tier_modal.quality_heading')}</p>
                                    <div className="flex gap-2">
                                        {(['GREEN', 'YELLOW', 'RED'] as const).map(r => {
                                            const isCurrent = ms.qualityRating === r;
                                            const q = QUALITY_INFO[r];
                                            return (
                                                <div key={r} className={`flex-1 p-3 rounded-xl text-center transition-all ${
                                                    isCurrent ? `ring-2 ring-offset-1 ${q.ringCls}` : 'bg-slate-50 opacity-30'
                                                }`}>
                                                    <span className={`inline-block w-3 h-3 rounded-full ${q.dotCls} mb-1.5`} />
                                                    <p className="text-xs font-bold text-slate-700">{t(q.labelKey)}</p>
                                                    <p className="text-[10px] text-slate-500 mt-0.5 leading-snug">{t(q.descKey)}</p>
                                                </div>
                                            );
                                        })}
                                    </div>
                                </div>
                            )}

                            <p className="text-[11px] text-slate-400 text-center leading-relaxed">
                                {t('clients.tier_modal.meta_auto_update')}<br />
                                {t('clients.tier_modal.levels_auto')}
                            </p>
                        </div>
                    </motion.div>
                </motion.div>
            )}
        </AnimatePresence>
    );
}

function DailyLimitCell({ ms }: { ms?: MetaStatus }) {
    const { t } = useTranslation();
    const [showInfo, setShowInfo] = useState(false);
    const isLoading = !ms || ms.loading;
    const tierCfg = TIER_CONFIG[ms?.messagingLimitTier ?? ''];
    return (
        <>
            <div className="flex items-center gap-3">
                <div className={`p-2 rounded-lg ${tierCfg?.bgCls ?? 'bg-indigo-50'}`}>
                    <MessageSquare className={`w-4 h-4 ${tierCfg?.iconCls ?? 'text-indigo-500'}`} />
                </div>
                <div>
                    <p className="text-[10px] uppercase font-bold text-slate-400 tracking-wider">{t('clients.cells.daily_limit_header')}</p>
                    <div className="flex items-center gap-1.5">
                        {isLoading
                            ? <span className="text-slate-400 text-xs animate-pulse">…</span>
                            : <p className={`text-sm font-semibold ${tierCfg?.textCls ?? 'text-slate-700'}`}>{dailyLimitLabel(ms, t)}</p>
                        }
                        {!isLoading && ms?.qualityRating && <QualityDot rating={ms.qualityRating} />}
                        {!isLoading && ms?.configured && (
                            <button onClick={() => setShowInfo(true)} title={t('clients.cells.daily_limit_info_tooltip')} className="text-slate-300 hover:text-indigo-500 transition ml-0.5">
                                <Info className="w-3.5 h-3.5" />
                            </button>
                        )}
                    </div>
                </div>
            </div>
            <TierInfoModal ms={ms} open={showInfo} onClose={() => setShowInfo(false)} />
        </>
    );
}

// ─── Personality Studio Modal ─────────────────────────────────────────────────

function PersonalityStudioModal({ org, onClose, onSave }: PersonalityModalProps) {
    const { t } = useTranslation();
    const [config, setConfig] = useState(org.personalityConfig || {
        botName: '',
        coreMission: '',
        toneDescription: ''
    });
    const [isSaving, setIsSaving] = useState(false);

    const handleSubmit = async (e: React.FormEvent) => {
        e.preventDefault();
        setIsSaving(true);
        await onSave(config);
        setIsSaving(false);
    };

    return (
        <div className="fixed inset-0 bg-slate-900/60 backdrop-blur-md flex items-center justify-center p-4 z-[60]">
            <div className="bg-white rounded-[2.5rem] shadow-2xl w-full max-w-2xl p-10 animate-in fade-in zoom-in-95 duration-300">
                <div className="flex items-center justify-between mb-8">
                    <div className="flex items-center gap-4">
                        <div className="w-12 h-12 bg-indigo-50 rounded-2xl flex items-center justify-center">
                            <Activity className="w-6 h-6 text-indigo-600" />
                        </div>
                        <div>
                            <h2 className="text-2xl font-black text-slate-900">{t('clients.personality_modal.title')}</h2>
                            <p className="text-slate-500 font-medium text-sm">{t('clients.personality_modal.subtitle', { orgName: org.name })}</p>
                        </div>
                    </div>
                    <button onClick={onClose} className="p-3 hover:bg-slate-100 rounded-full transition">
                        <X className="w-6 h-6 text-slate-400" />
                    </button>
                </div>

                <form onSubmit={handleSubmit} className="space-y-8">
                    <div className="grid gap-6">
                        <div>
                            <label className="block text-sm font-bold text-slate-700 mb-2.5">{t('clients.personality_modal.bot_name_label')}</label>
                            <input
                                type="text"
                                placeholder={t('clients.personality_modal.bot_name_placeholder')}
                                value={config.botName}
                                onChange={e => setConfig({...config, botName: e.target.value})}
                                className="w-full border border-slate-200 rounded-2xl px-5 py-4 outline-none focus:ring-4 focus:ring-indigo-50 transition font-medium"
                            />
                        </div>

                        <div>
                            <label className="block text-sm font-bold text-slate-700 mb-2.5">{t('clients.personality_modal.mission_label')}</label>
                            <textarea
                                placeholder={t('clients.personality_modal.mission_placeholder')}
                                value={config.coreMission}
                                onChange={e => setConfig({...config, coreMission: e.target.value})}
                                className="w-full border border-slate-200 rounded-2xl px-5 py-4 outline-none focus:ring-4 focus:ring-indigo-50 transition min-h-[120px] font-medium leading-relaxed"
                            />
                        </div>

                        <div>
                            <label className="block text-sm font-bold text-slate-700 mb-2.5">{t('clients.personality_modal.tone_label')}</label>
                            <textarea
                                placeholder={t('clients.personality_modal.tone_placeholder')}
                                value={config.toneDescription}
                                onChange={e => setConfig({...config, toneDescription: e.target.value})}
                                className="w-full border border-slate-200 rounded-2xl px-5 py-4 outline-none focus:ring-4 focus:ring-indigo-50 transition min-h-[120px] font-medium leading-relaxed"
                            />
                        </div>
                    </div>

                    <div className="flex gap-4 pt-4">
                        <button
                            type="button"
                            onClick={onClose}
                            className="flex-1 px-6 py-4 rounded-2xl font-bold text-slate-600 hover:bg-slate-50 transition"
                        >
                            {t('clients.personality_modal.cancel')}
                        </button>
                        <button
                            type="submit"
                            disabled={isSaving}
                            className="flex-[2] bg-slate-900 text-white py-4 rounded-2xl font-bold hover:bg-slate-800 transition disabled:opacity-50 flex items-center justify-center gap-3 shadow-xl shadow-slate-200"
                        >
                            {isSaving ? <Loader2 className="w-5 h-5 animate-spin" /> : <ShieldCheck className="w-5 h-5" />}
                            {t('clients.personality_modal.submit')}
                        </button>
                    </div>
                </form>
            </div>
        </div>
    );
}