'use client';

import React, { useState } from 'react';
import { useRouter } from 'next/navigation';
import { Card, CardContent, CardFooter, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { formatDistanceToNow } from 'date-fns';
import { CheckCircle, Clock, ShieldAlert, Filter, Search, User, Mail, Video as VideoIcon, Tv } from 'lucide-react';
import { Label } from '@/components/ui/label';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Input } from '@/components/ui/input';
import { updateRequestStatus } from '@/actions/submit-request';
import { toast } from 'sonner';
import Image from 'next/image';

interface Request {
    id: string;
    videoId: string;
    creatorId: string;
    viewerName: string | null;
    viewerEmail: string | null;
    note: string;
    imageUrl: string | null;
    status: string;
    createdAt: Date;
    video: {
        title: string;
        channel: {
            channelName: string;
        };
    };
    creator: {
        name: string | null;
    };
}

interface AdminRequestListProps {
    requests: Request[];
    forcedStatus?: string;
    hideFilters?: boolean;
}

export function AdminRequestList({ requests: initialRequests, forcedStatus, hideFilters }: AdminRequestListProps) {
    const router = useRouter();
    const [requests, setRequests] = useState(initialRequests);
    const [filterStatus, setFilterStatus] = useState<string>(forcedStatus || 'PENDING');
    const [sortBy, setSortBy] = useState<string>('date');
    const [searchQuery, setSearchQuery] = useState('');

    const stats = {
        pending: requests.filter(r => r.status === 'PENDING').length,
        fulfilled: requests.filter(r => r.status === 'FULFILLED').length,
        dismissed: requests.filter(r => r.status === 'DISMISSED').length,
    };

    const filteredRequests = requests.filter(r => {
        if (r.status !== filterStatus) return false;
        if (searchQuery) {
            const query = searchQuery.toLowerCase();
            return (
                r.note.toLowerCase().includes(query) ||
                (r.viewerName?.toLowerCase().includes(query) ?? false) ||
                (r.viewerEmail?.toLowerCase().includes(query) ?? false) ||
                (r.video.title.toLowerCase().includes(query)) ||
                (r.video.channel.channelName.toLowerCase().includes(query))
            );
        }
        return true;
    }).sort((a, b) => {
        if (sortBy === 'date') {
            return new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime();
        }
        return 0;
    });

    const handleStatusUpdate = async (id: string, newStatus: 'PENDING' | 'FULFILLED' | 'DISMISSED') => {
        try {
            const result = await updateRequestStatus(id, newStatus);
            if (result.success) {
                setRequests(prev => prev.map(r => r.id === id ? { ...r, status: newStatus } : r));
                toast.success(`Request marked as ${newStatus.toLowerCase()}`);
                router.refresh();
            } else {
                toast.error(result.error || 'Failed to update status');
            }
        } catch (err) {
            toast.error('Failed to update request status');
        }
    };

    // Update internal status if forcedStatus changes
    React.useEffect(() => {
        if (forcedStatus) {
            setFilterStatus(forcedStatus);
        }
    }, [forcedStatus]);


    return (
        <div className="space-y-6">
            {/* Filter Bar */}
            {!hideFilters && (
                <div className="flex flex-col gap-4 bg-card/50 p-4 rounded-lg border border-border/50 backdrop-blur-sm">
                    <div className="flex flex-wrap items-center gap-4">
                        <div className="space-y-1">
                            <Label>Status</Label>
                            <Select value={filterStatus} onValueChange={setFilterStatus}>
                                <SelectTrigger className="w-[150px] h-9 bg-background/50">
                                    <SelectValue placeholder="Status" />
                                </SelectTrigger>
                                <SelectContent>
                                    <SelectItem value="PENDING">Pending ({stats.pending})</SelectItem>
                                    <SelectItem value="FULFILLED">Fulfilled ({stats.fulfilled})</SelectItem>
                                    <SelectItem value="DISMISSED">Dismissed ({stats.dismissed})</SelectItem>
                                </SelectContent>
                            </Select>
                        </div>

                        <div className="space-y-1">
                            <Label>Sort By</Label>
                            <Select value={sortBy} onValueChange={setSortBy}>
                                <SelectTrigger className="w-[150px] h-9 bg-background/50">
                                    <SelectValue placeholder="Sort By" />
                                </SelectTrigger>
                                <SelectContent>
                                    <SelectItem value="date">Date (Newest)</SelectItem>
                                </SelectContent>
                            </Select>
                        </div>

                        <div className="space-y-1 flex-grow">
                            <Label>Search</Label>
                            <div className="relative">
                                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
                                <Input
                                    placeholder="Search by note, creator, video, name or email..."
                                    value={searchQuery}
                                    onChange={(e) => setSearchQuery(e.target.value)}
                                    className="pl-9 h-9 bg-background/50"
                                />
                            </div>
                        </div>
                    </div>

                    <div className="flex items-center justify-between">
                        <div className="text-sm text-muted-foreground">
                            Showing {filteredRequests.length} of {requests.filter(r => r.status === filterStatus).length} {filterStatus.toLowerCase()} requests
                        </div>
                    </div>
                </div>
            )}

            {filteredRequests.length > 0 ? (
                <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
                    {filteredRequests.map((request) => (
                        <Card key={request.id} className="bg-card/60 border-white/10 overflow-hidden flex flex-col hover:border-primary/20 transition-all group">
                            {request.imageUrl && (
                                <div className="relative aspect-video w-full overflow-hidden border-b border-white/10">
                                    <Image
                                        src={request.imageUrl}
                                        alt="Requested product"
                                        fill
                                        className="object-cover group-hover:scale-105 transition-transform duration-500"
                                    />
                                </div>
                            )}
                            <CardHeader className="pb-2">
                                <div className="flex justify-between items-start gap-2">
                                    <div className="flex flex-col gap-1.5">
                                        <Badge variant={request.status === 'PENDING' ? 'secondary' : 'default'} className="w-fit bg-primary/20 text-primary border-primary/30 text-[10px] uppercase font-bold tracking-wider">
                                            {request.status}
                                        </Badge>
                                        <div className="flex items-center gap-1.5 text-[10px] font-bold text-amber-500 uppercase tracking-widest bg-amber-500/10 px-2 py-0.5 rounded-full border border-amber-500/20">
                                            <Tv className="h-3 w-3" />
                                            {request.video.channel.channelName}
                                        </div>
                                    </div>
                                    <span className="text-[10px] text-muted-foreground flex items-center gap-1">
                                        <Clock className="h-3 w-3" />
                                        {formatDistanceToNow(new Date(request.createdAt), { addSuffix: true })}
                                    </span>
                                </div>
                                <CardTitle className="text-base mt-3 text-white line-clamp-2 leading-snug">
                                    {request.note}
                                </CardTitle>
                            </CardHeader>
                            <CardContent className="space-y-3 flex-grow pb-4">
                                <div className="flex items-center gap-2 text-xs text-muted-foreground bg-white/5 p-2 rounded-lg">
                                    <VideoIcon className="h-3.5 w-3.5 shrink-0 text-primary/70" />
                                    <span className="truncate italic">"{request.video.title}"</span>
                                </div>
                                <div className="space-y-1.5 px-1">
                                    <div className="flex items-center gap-2 text-xs text-muted-foreground">
                                        <User className="h-3.5 w-3.5 shrink-0" />
                                        <span><span className="text-white/60">From:</span> {request.viewerName || 'Anonymous'}</span>
                                    </div>
                                    {request.viewerEmail && (
                                        <div className="flex items-center gap-2 text-xs text-muted-foreground">
                                            <Mail className="h-3.5 w-3.5 shrink-0" />
                                            <span className="truncate">{request.viewerEmail}</span>
                                        </div>
                                    )}
                                </div>
                            </CardContent>
                            <CardFooter className="flex gap-2 pt-4 border-t border-white/5 bg-white/5 mt-auto">
                                <button
                                    onClick={() => handleStatusUpdate(request.id, 'FULFILLED')}
                                    disabled={request.status === 'FULFILLED'}
                                    className="flex-1 h-9 rounded-lg bg-emerald-500/10 text-emerald-500 border border-emerald-500/20 text-xs font-bold hover:bg-emerald-500 hover:text-white transition-all disabled:opacity-50"
                                >
                                    Mark Fulfilled
                                </button>
                                <button
                                    onClick={() => handleStatusUpdate(request.id, 'DISMISSED')}
                                    disabled={request.status === 'DISMISSED'}
                                    className="flex-1 h-9 rounded-lg bg-white/5 text-muted-foreground border border-white/10 text-xs font-bold hover:bg-rose-500/10 hover:text-rose-500 hover:border-rose-500/20 transition-all disabled:opacity-50"
                                >
                                    Dismiss
                                </button>
                            </CardFooter>
                        </Card>
                    ))}
                </div>
            ) : (
                <div className="py-20 text-center space-y-4 bg-muted/20 rounded-xl border-2 border-dashed border-border/50">
                    <div className="flex justify-center">
                        <ShieldAlert className="w-12 h-12 text-muted-foreground opacity-20" />
                    </div>
                    <div className="space-y-2">
                        <h3 className="text-xl font-semibold">No requests found</h3>
                        <p className="text-muted-foreground">Try adjusting your filters or search query.</p>
                    </div>
                </div>
            )}
        </div>
    );
}