'use client';

import { useState } from 'react';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import {
  Settings, Trash2, Loader2, FileSpreadsheet, FileText, Presentation,
} from 'lucide-react';
import { useI18n } from '@/lib/i18n';

export default function GeneralSettingsPage() {
  const { t } = useI18n();
  const [isClearing, setIsClearing] = useState(false);

  const handleClearCache = async () => {
    setIsClearing(true);
    try {
      localStorage.removeItem('translation-settings');
      sessionStorage.clear();
      if ('caches' in window) {
        const cacheNames = await caches.keys();
        await Promise.all(cacheNames.map(name => caches.delete(name)));
      }
      await new Promise(resolve => setTimeout(resolve, 500));
      window.location.reload();
    } catch (error) {
      console.error('Error clearing cache:', error);
      setIsClearing(false);
    }
  };

  const formats = [
    { icon: <FileSpreadsheet className="w-6 h-6 text-green-500" />, name: 'Excel', ext: '.xlsx, .xls', features: [t('settings.formats.formulas'), t('settings.formats.styles'), t('settings.formats.images')] },
    { icon: <FileText className="w-6 h-6 text-blue-500" />, name: 'Word', ext: '.docx, .doc', features: [t('settings.formats.headers'), t('settings.formats.tables'), t('settings.formats.images')] },
    { icon: <Presentation className="w-6 h-6 text-orange-500" />, name: 'PowerPoint', ext: '.pptx, .ppt', features: [t('settings.formats.slides'), t('settings.formats.notes'), t('settings.formats.images')] },
  ];

  return (
    <div className="flex flex-col gap-6 p-6 lg:p-8 max-w-3xl">
      <div>
        <h1 className="text-2xl font-bold text-foreground">{t('settings.title')}</h1>
        <p className="text-sm text-muted-foreground mt-1">{t('settings.subtitle')}</p>
      </div>

      {/* Supported Formats */}
      <Card>
        <CardHeader>
          <div className="flex items-center gap-3">
            <div className="p-2 rounded-lg bg-primary/10">
              <Settings className="h-5 w-5 text-primary" />
            </div>
            <div>
              <CardTitle>{t('settings.formats.title')}</CardTitle>
              <CardDescription>{t('settings.formats.subtitle')}</CardDescription>
            </div>
          </div>
        </CardHeader>
        <CardContent>
          <div className="grid grid-cols-1 sm:grid-cols-3 gap-4">
            {formats.map((f) => (
              <div key={f.name} className="flex items-start gap-3 p-3 rounded-lg border border-border">
                <div className="p-2 rounded-lg bg-muted">{f.icon}</div>
                <div className="flex-1 min-w-0">
                  <p className="font-semibold text-foreground text-sm">{f.name}</p>
                  <p className="text-xs text-muted-foreground">{f.ext}</p>
                  <div className="flex flex-wrap gap-1 mt-1.5">
                    {f.features.map(ft => (
                      <Badge key={ft} variant="outline" className="text-[10px] px-1.5 py-0">{ft}</Badge>
                    ))}
                  </div>
                </div>
              </div>
            ))}
          </div>
        </CardContent>
      </Card>

      {/* Danger zone */}
      <Card className="border-border/60">
        <CardHeader>
          <CardTitle className="text-base flex items-center gap-2">
            <Trash2 className="w-4 h-4 text-muted-foreground" /> {t('settings.cache.title')}
          </CardTitle>
        </CardHeader>
        <CardContent className="flex items-center justify-between gap-4">
          <p className="text-sm text-muted-foreground">{t('settings.cache.desc')}</p>
          <Button onClick={handleClearCache} disabled={isClearing} variant="outline" size="sm" className="shrink-0">
            {isClearing ? <><Loader2 className="me-1.5 h-3.5 w-3.5 animate-spin" />{t('settings.cache.clearing')}</> : <><Trash2 className="me-1.5 h-3.5 w-3.5" />{t('settings.cache.clear')}</>}
          </Button>
        </CardContent>
      </Card>
    </div>
  );
}