"use client";

// ============================================================================
// Creative Detail Page
// ============================================================================

import React, { useEffect, useState } from "react";
import { use } from "react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { DashboardHeader } from "@/components/layout/dashboard-header";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { Alert, AlertDescription } from "@/components/ui/alert";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import { creativesApi } from "@/lib/api";
import {
  formatNumber,
  formatMetric,
  formatCurrency,
  formatDate,
} from "@/lib/utils/format";
import {
  Folder,
  ArrowLeft,
  Loader2,
  AlertCircle,
  Archive,
  Trash2,
  BarChart3,
  Users,
  TrendingUp,
} from "lucide-react";
import type { CreativeDetail } from "@/lib/types/api";

interface PageProps {
  params: Promise<{ id: string }>;
}

export default function CreativeDetailPage({ params }: PageProps) {
  const resolvedParams = use(params);
  const router = useRouter();
  const [creative, setCreative] = useState<CreativeDetail | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    const loadCreative = async () => {
      try {
        setLoading(true);
        const data = await creativesApi.get(resolvedParams.id);
        setCreative(data);
      } catch (err: any) {
        setError(err?.error?.message || "Ошибка загрузки креатива");
      } finally {
        setLoading(false);
      }
    };

    loadCreative();
  }, [resolvedParams.id]);

  const handleArchive = async () => {
    if (!creative) return;

    try {
      await creativesApi.update(creative.id, {
        is_archived: !creative.is_archived,
      });
      setCreative({ ...creative, is_archived: !creative.is_archived });
    } catch (err: any) {
      alert(err?.error?.message || "Ошибка обновления креатива");
    }
  };

  const handleDelete = async () => {
    if (!creative) return;
    if (!confirm(`Удалить креатив "${creative.name}"?`)) return;

    try {
      await creativesApi.delete(creative.id);
      router.push("/creatives");
    } catch (err: any) {
      alert(err?.error?.message || "Ошибка удаления креатива");
    }
  };

  if (loading) {
    return (
      <>
        <DashboardHeader
          breadcrumbs={[
            { label: "Креативы", href: "/creatives" },
            { label: "Загрузка..." },
          ]}
        />
        <div className="flex flex-1 items-center justify-center">
          <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
        </div>
      </>
    );
  }

  if (error || !creative) {
    return (
      <>
        <DashboardHeader
          breadcrumbs={[
            { label: "Креативы", href: "/creatives" },
            { label: "Ошибка" },
          ]}
        />
        <div className="flex flex-1 flex-col gap-4 p-4 pt-0 mt-4">
          <Alert variant="destructive">
            <AlertCircle className="h-4 w-4" />
            <AlertDescription>{error || "Креатив не найден"}</AlertDescription>
          </Alert>
          <Button asChild variant="outline">
            <Link href="/creatives">
              <ArrowLeft className="mr-2 h-4 w-4" />
              Вернуться к креативам
            </Link>
          </Button>
        </div>
      </>
    );
  }

  const previewText = creative.text.replace(
    "{link}",
    "https://t.me/+InviteLinkExample"
  );

  return (
    <>
      <DashboardHeader
        breadcrumbs={[
          { label: "Главная", href: "/" },
          { label: "Креативы", href: "/creatives" },
          { label: creative.name },
        ]}
      />
      <div className="flex flex-1 flex-col gap-4 p-4 pt-0 mt-4">
        <div className="flex items-start justify-between">
          <div className="flex-1">
            <div className="flex items-center gap-2 mb-2">
              <Folder className="h-6 w-6" />
              <h1 className="text-3xl font-bold tracking-tight">
                {creative.name}
              </h1>
              {creative.is_archived && <Badge variant="secondary">Архив</Badge>}
            </div>
            <div className="text-sm text-muted-foreground">
              Целевой канал: {creative.target_channel.title}
            </div>
          </div>
          <div className="flex gap-2">
            <Button variant="outline" onClick={handleArchive}>
              <Archive className="mr-2 h-4 w-4" />
              {creative.is_archived ? "Разархивировать" : "Архивировать"}
            </Button>
            <Button variant="destructive" onClick={handleDelete}>
              <Trash2 className="mr-2 h-4 w-4" />
              Удалить
            </Button>
          </div>
        </div>

        <div className="grid gap-4 md:grid-cols-3">
          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">
                Всего закупов
              </CardTitle>
              <BarChart3 className="h-4 w-4 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold">
                {formatNumber(creative.total_purchases)}
              </div>
              <p className="text-xs text-muted-foreground mt-1">
                С этим креативом
              </p>
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">
                Подписчиков привлечено
              </CardTitle>
              <Users className="h-4 w-4 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold">
                {formatNumber(creative.total_subscriptions)}
              </div>
              <p className="text-xs text-muted-foreground mt-1">Всего</p>
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">Средний CPF</CardTitle>
              <TrendingUp className="h-4 w-4 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold">
                ₽{formatMetric(creative.avg_cpf)}
              </div>
              <p className="text-xs text-muted-foreground mt-1">
                По всем закупам
              </p>
            </CardContent>
          </Card>
        </div>

        <div className="grid gap-4 md:grid-cols-2">
          <Card>
            <CardHeader>
              <CardTitle>Текст креатива</CardTitle>
              <CardDescription>Шаблон с переменной {"{link}"}</CardDescription>
            </CardHeader>
            <CardContent>
              <div className="rounded-lg border bg-muted/50 p-4">
                <pre className="text-sm whitespace-pre-wrap font-sans">
                  {creative.text}
                </pre>
              </div>
            </CardContent>
          </Card>

          <Card>
            <CardHeader>
              <CardTitle>Предпросмотр</CardTitle>
              <CardDescription>
                С подставленной пригласительной ссылкой
              </CardDescription>
            </CardHeader>
            <CardContent>
              <div className="rounded-lg border bg-muted/50 p-4">
                <p className="text-sm whitespace-pre-wrap">{previewText}</p>
              </div>
            </CardContent>
          </Card>
        </div>

        <Card>
          <CardHeader>
            <CardTitle>Закупы с этим креативом</CardTitle>
            <CardDescription>История использования креатива</CardDescription>
          </CardHeader>
          <CardContent>
            {creative.purchases.length === 0 ? (
              <p className="text-center text-muted-foreground py-8">
                Закупов с этим креативом пока нет
              </p>
            ) : (
              <Table>
                <TableHeader>
                  <TableRow>
                    <TableHead>Внешний канал</TableHead>
                    <TableHead>Дата</TableHead>
                    <TableHead className="text-right">Стоимость</TableHead>
                    <TableHead className="text-right">Подписчики</TableHead>
                    <TableHead className="text-right">CPF</TableHead>
                    <TableHead></TableHead>
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {creative.purchases.map((purchase) => (
                    <TableRow key={purchase.id}>
                      <TableCell className="font-medium">
                        {purchase.external_channel.title}
                      </TableCell>
                      <TableCell>
                        {formatDate(
                          purchase.actual_date || purchase.scheduled_date
                        )}
                      </TableCell>
                      <TableCell className="text-right">
                        {formatCurrency(purchase.cost)}
                      </TableCell>
                      <TableCell className="text-right">
                        {formatNumber(purchase.subscriptions_count)}
                      </TableCell>
                      <TableCell className="text-right">
                        ₽{formatMetric(purchase.cpf)}
                      </TableCell>
                      <TableCell className="text-right">
                        <Button asChild variant="ghost" size="sm">
                          <Link href={`/purchases/${purchase.id}`}>
                            Открыть
                          </Link>
                        </Button>
                      </TableCell>
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            )}
          </CardContent>
        </Card>
      </div>
    </>
  );
}