import React, { useState, useEffect } from 'react';
import { Card } from '../ui/card';
import { Button } from '../ui/button';
import { Badge } from '../ui/badge';
import { EmptyState } from '../ui/empty-state';
import { Report } from '../../types';
import {
  ShieldAlert,
  CheckCircle,
  Ban,
  MessageSquare,
  Clock,
  Loader2,
} from 'lucide-react';
import { useToast } from '../../components/feedback/ToastProvider';
import { adminService } from '../../services/adminService';
import { logger } from '@/utils/logger';

export const AdminModerationView: React.FC = () => {
  const { addToast } = useToast();
  const [queue, setQueue] = useState<Report[]>([]);
  const [activeTab, setActiveTab] = useState<
    'pending' | 'reviewed' | 'resolved'
  >('pending');
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    const loadQueue = async () => {
      setLoading(true);
      try {
        const data = await adminService.getModerationQueue('all');
        setQueue(data);
      } catch (e) {
        logger.error('Error loading moderation queue', {
          error: e instanceof Error ? e.message : String(e),
          stack: e instanceof Error ? e.stack : undefined,
        });
      } finally {
        setLoading(false);
      }
    };
    loadQueue();
  }, []);

  const filteredQueue = queue.filter((r) =>
    activeTab === 'pending'
      ? r.status === 'pending'
      : activeTab === 'reviewed'
        ? r.status === 'reviewed'
        : r.status === 'resolved' || r.status === 'dismissed',
  );

  const handleAction = async (id: string, action: string) => {
    try {
      await adminService.resolveReport(id, action);
      addToast(`Report ${action}`, 'success');
      setQueue(
        queue.map((r) =>
          r.id === id
            ? ({
                ...r,
                status: action === 'dismissed' ? 'dismissed' : 'resolved',
              } as any)
            : r,
        ),
      );
    } catch (e) {
      addToast('Action failed', 'error');
    }
  };

  return (
    <div className="space-y-6 animate-fadeIn pb-20">
      <h2 className="text-2xl font-display font-bold text-white mb-6">
        MODERATION QUEUE
      </h2>

      <div className="border-b border-border flex gap-6 mb-6">
        {['pending', 'reviewed', 'resolved'].map((tab) => (
          <button
            key={tab}
            onClick={() => setActiveTab(tab as any)}
            className={`pb-3 text-sm font-bold uppercase tracking-wider border-b-2 transition-colors ${activeTab === tab ? 'border-destructive text-foreground' : 'border-transparent text-muted-foreground hover:text-foreground'}`}
          >
            {tab} (
            {
              queue.filter((r) =>
                tab === 'pending'
                  ? r.status === 'pending'
                  : tab === 'reviewed'
                    ? r.status === 'reviewed'
                    : r.status === 'resolved' || r.status === 'dismissed',
              ).length
            }
            )
          </button>
        ))}
      </div>

      <div className="space-y-4">
        {loading && (
          <div className="flex justify-center py-24">
            <Loader2 className="w-8 h-8 text-muted-foreground animate-spin" />
          </div>
        )}

        {!loading && filteredQueue.length === 0 && (
          <EmptyState
            icon={<ShieldAlert className="w-full h-full" />}
            title="All caught up!"
            description="No reports in this queue."
          />
        )}

        {!loading &&
          filteredQueue.map((report) => (
            <Card
              key={report.id}
              variant="default"
              className="border-l-4 border-l-destructive"
            >
              <div className="flex flex-col md:flex-row justify-between gap-4">
                <div className="flex-1">
                  <div className="flex items-center gap-4 mb-2">
                    <Badge label={report.targetType} variant="terminal" />
                    <span className="font-bold text-white text-lg">
                      {report.targetName}
                    </span>
                    <span className="text-xs text-muted-foreground font-mono flex items-center gap-1">
                      <Clock className="w-3 h-3" /> {report.timestamp}
                    </span>
                  </div>
                  <div className="bg-muted/50 p-4 rounded border border-border mb-3">
                    <div className="text-xs font-bold text-destructive uppercase mb-1">
                      Reason: {report.reason}
                    </div>
                    <p className="text-sm text-foreground">
                      {report.description}
                    </p>
                  </div>
                  <div className="text-xs text-muted-foreground">
                    Reported by:{' '}
                    <span className="text-white">{report.reportedBy}</span>
                  </div>
                </div>

                <div className="flex flex-col gap-2 justify-center min-w-36">
                  <Button
                    variant="primary"
                    size="sm"
                    className="bg-destructive hover:bg-destructive/90 border-destructive text-destructive-foreground"
                    icon={<Ban className="w-4 h-4" />}
                    onClick={() => handleAction(report.id, 'banned')}
                  >
                    Ban User
                  </Button>
                  <Button
                    variant="secondary"
                    size="sm"
                    icon={<CheckCircle className="w-4 h-4" />}
                    onClick={() => handleAction(report.id, 'resolved')}
                  >
                    Resolve
                  </Button>
                  <Button
                    variant="ghost"
                    size="sm"
                    icon={<MessageSquare className="w-4 h-4" />}
                    onClick={() => addToast('Warning sent')}
                  >
                    Send Warning
                  </Button>
                  <Button
                    variant="ghost"
                    size="sm"
                    className="text-muted-foreground hover:text-foreground"
                    onClick={() => handleAction(report.id, 'dismissed')}
                  >
                    Dismiss
                  </Button>
                </div>
              </div>
            </Card>
          ))}
      </div>
    </div>
  );
};