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import React, { useEffect, useState } from 'react';
import { useTranslation } from 'react-i18next';
import { request as invoke } from '../../utils/request';
import { Trash2, Check, Plus, Search, X, ShieldCheck } from 'lucide-react';

interface IpWhitelistEntry {
    ip_pattern: string;
    description?: string;
    added_at: number;
    added_by?: string;
}

interface Props {
    refreshKey?: number;
}

export const WhitelistManager: React.FC<Props> = ({ refreshKey }) => {
    const { t } = useTranslation();
    const [entries, setEntries] = useState<IpWhitelistEntry[]>([]);
    const [loading, setLoading] = useState(false);
    const [search, setSearch] = useState('');

    // Add Modal State
    const [isAddOpen, setIsAddOpen] = useState(false);
    const [newIp, setNewIp] = useState('');
    const [newDescription, setNewDescription] = useState('');

    const loadWhitelist = async () => {
        setLoading(true);
        try {
            const data = await invoke<IpWhitelistEntry[]>('get_ip_whitelist');
            setEntries(data);
        } catch (e) {
            console.error('Failed to load whitelist', e);
        } finally {
            setLoading(false);
        }
    };

    useEffect(() => {
        loadWhitelist();
    }, [refreshKey]);

    const handleAdd = async () => {
        try {
            await invoke('add_ip_to_whitelist', {
                request: {
                    ipPattern: newIp,
                    description: newDescription || null,
                }
            });
            setIsAddOpen(false);
            setNewIp('');
            setNewDescription('');
            loadWhitelist();
        } catch (e) {
            console.error('Failed to add to whitelist', e);
            alert('Failed to add IP: ' + e);
        }
    };

    const handleRemove = async (ipPattern: string) => {
        // 乐观更新:立即从UI中移除
        setEntries(prev => prev.filter(e => e.ip_pattern !== ipPattern));

        try {
            await invoke('remove_ip_from_whitelist', { ipPattern: ipPattern });
        } catch (e) {
            console.error('Failed to remove from whitelist', e);
            // 如果删除失败,重新加载数据恢复UI
            loadWhitelist();
        }
    };

    const filteredEntries = entries.filter(e =>
        e.ip_pattern.includes(search) || (e.description && e.description.toLowerCase().includes(search.toLowerCase()))
    );

    return (
        <div className="flex flex-col h-full bg-white dark:bg-base-100 rounded-xl">
            <div className="p-5 border-b border-gray-100 dark:border-base-200 flex items-center gap-4">
                <button
                    onClick={() => setIsAddOpen(true)}
                    className="px-4 py-2 bg-white dark:bg-base-100 text-gray-700 dark:text-gray-300 text-sm font-medium rounded-lg hover:bg-gray-50 dark:hover:bg-base-200 transition-colors flex items-center gap-2 shadow-sm border border-gray-200/50 dark:border-base-300"
                >
                    <Plus size={16} /> {t('security.whitelist.add_ip')}
                </button>

                <div className="relative flex-1 max-w-md">
                    <Search className="absolute left-3 top-2.5 text-gray-400" size={16} />
                    <input
                        type="text"
                        placeholder={t('security.blacklist.search_placeholder')}
                        className="input input-sm input-bordered w-full pl-9"
                        value={search}
                        onChange={(e) => setSearch(e.target.value)}
                    />
                </div>

                <div className="flex-1"></div>
            </div>

            <div className="flex-1 overflow-auto p-4">
                <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                    {filteredEntries.map(entry => (
                        <div key={entry.ip_pattern} className="bg-white dark:bg-base-100 border border-green-100 dark:border-green-900/30 rounded-lg p-4 shadow-sm hover:shadow-md transition-shadow relative group">
                            <div className="absolute top-0 right-0 p-2 opacity-10">
                                <ShieldCheck size={64} className="text-green-500" />
                            </div>

                            <div className="flex items-start justify-between mb-2 relative z-10">
                                <h3 className="font-mono font-bold text-lg text-green-700 dark:text-green-400">{entry.ip_pattern}</h3>
                                <button
                                    onClick={() => handleRemove(entry.ip_pattern)}
                                    className="btn btn-ghost btn-xs text-red-500 opacity-0 group-hover:opacity-100 transition-opacity"
                                >
                                    <Trash2 size={14} />
                                </button>
                            </div>

                            {entry.description && (
                                <p className="text-sm text-gray-600 dark:text-gray-400 mb-2 flex items-center gap-1 relative z-10">
                                    <Check size={12} className="text-green-500" /> {entry.description}
                                </p>
                            )}

                            <div className="text-xs text-gray-400 flex flex-col gap-1 mt-3 pt-3 border-t border-gray-50 dark:border-base-200 relative z-10">
                                <span>{t('security.blacklist.added_at')}: {new Date(entry.added_at * 1000).toLocaleString()}</span>
                            </div>
                        </div>
                    ))}
                    {!loading && filteredEntries.length === 0 && (
                        <div className="col-span-full text-center py-10 text-gray-400">
                            {t('security.whitelist.no_data')}
                        </div>
                    )}
                </div>
            </div>

            {/* Add Modal */}
            {isAddOpen && (
                <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm">
                    <div className="bg-white dark:bg-base-100 rounded-lg shadow-xl w-full max-w-md p-6">
                        <div className="flex justify-between items-center mb-4">
                            <h3 className="text-lg font-bold">{t('security.whitelist.add_title')}</h3>
                            <button onClick={() => setIsAddOpen(false)} className="btn btn-ghost btn-sm btn-circle">
                                <X size={18} />
                            </button>
                        </div>

                        <div className="space-y-4">
                            <div>
                                <label className="label">{t('security.blacklist.ip_cidr_label')}</label>
                                <input
                                    type="text"
                                    className="input input-bordered w-full"
                                    placeholder={t('security.blacklist.ip_cidr_placeholder')}
                                    value={newIp}
                                    onChange={e => setNewIp(e.target.value)}
                                />
                            </div>
                            <div>
                                <label className="label">{t('security.whitelist.description_label')}</label>
                                <input
                                    type="text"
                                    className="input input-bordered w-full"
                                    placeholder={t('security.whitelist.description_placeholder')}
                                    value={newDescription}
                                    onChange={e => setNewDescription(e.target.value)}
                                />
                            </div>

                            <div className="flex justify-end gap-3 mt-6">
                                <button
                                    className="px-4 py-2 bg-gray-100 dark:bg-base-200 text-gray-700 dark:text-gray-300 text-sm font-medium rounded-lg hover:bg-gray-200 dark:hover:bg-base-300 transition-colors"
                                    onClick={() => setIsAddOpen(false)}
                                >
                                    {t('security.whitelist.cancel')}
                                </button>
                                <button
                                    className="px-4 py-2 bg-emerald-500 hover:bg-emerald-600 text-white text-sm font-medium rounded-lg shadow-lg shadow-emerald-500/20 transition-all disabled:opacity-50 disabled:cursor-not-allowed"
                                    onClick={handleAdd}
                                    disabled={!newIp}
                                >
                                    {t('security.whitelist.add_btn')}
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            )}
        </div>
    );
};