"use client";

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

import { useEffect, useState } from "react";
import { useParams, useRouter, useSearchParams } from "next/navigation";
import Link from "next/link";
import {
  Loader2,
  ArrowLeft,
  Pencil,
  Archive,
  Trash2,
  Copy,
  Check,
  ExternalLink,
} from "lucide-react";
import { DashboardHeader } from "@/components/layout/dashboard-header";
import { useWorkspace } from "@/components/providers/workspace-provider";
import { creativesApi } from "@/lib/api";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { Badge } from "@/components/ui/badge";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger,
} from "@/components/ui/alert-dialog";
import type { Creative } from "@/lib/types/api";

// ============================================================================
// Component
// ============================================================================

export default function CreativeDetailPage() {
  const params = useParams();
  const router = useRouter();
  const searchParams = useSearchParams();
  const workspaceId = params?.workspaceId as string;
  const creativeId = params?.creativeId as string;
  const { hasPermission } = useWorkspace();

  const [creative, setCreative] = useState<Creative | null>(null);
  const [loading, setLoading] = useState(true);
  const [isEditing, setIsEditing] = useState(searchParams.get("edit") === "true");
  const [isSaving, setIsSaving] = useState(false);
  const [copied, setCopied] = useState(false);

  // Edit form state
  const [name, setName] = useState("");
  const [text, setText] = useState("");
  const [error, setError] = useState<string | null>(null);

  const canWrite = hasPermission("placements_write");

  useEffect(() => {
    loadCreative();
  }, [workspaceId, creativeId]);

  const loadCreative = async () => {
    try {
      setLoading(true);
      const data = await creativesApi.get(workspaceId, creativeId);
      setCreative(data);
      setName(data.name);
      setText(data.text);
    } catch (err) {
      console.error("Failed to load creative:", err);
    } finally {
      setLoading(false);
    }
  };

  const handleSave = async () => {
    if (!name.trim() || !text.trim()) {
      setError("Заполните все поля");
      return;
    }

    if (!text.includes("{invite_link}")) {
      setError("Текст должен содержать {invite_link}");
      return;
    }

    try {
      setIsSaving(true);
      setError(null);

      const updated = await creativesApi.update(workspaceId, creativeId, {
        name: name.trim(),
        text: text.trim(),
      });

      setCreative(updated);
      setIsEditing(false);
    } catch (err: any) {
      setError(err?.detail || "Не удалось сохранить");
    } finally {
      setIsSaving(false);
    }
  };

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

    try {
      // Toggle archive status by updating via delete endpoint (soft delete)
      await creativesApi.delete(workspaceId, creativeId);
      router.push(`/dashboard/${workspaceId}/creatives`);
    } catch (err) {
      console.error("Failed to archive:", err);
    }
  };

  const handleCopy = () => {
    if (creative) {
      navigator.clipboard.writeText(creative.text);
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    }
  };

  const handleCancel = () => {
    if (creative) {
      setName(creative.name);
      setText(creative.text);
    }
    setIsEditing(false);
    setError(null);
  };

  if (loading) {
    return (
      <>
        <DashboardHeader breadcrumbs={[{ label: "Загрузка..." }]} />
        <div className="flex items-center justify-center py-12">
          <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
        </div>
      </>
    );
  }

  if (!creative) {
    return (
      <>
        <DashboardHeader breadcrumbs={[{ label: "Ошибка" }]} />
        <div className="flex flex-col items-center justify-center py-12">
          <h2 className="text-xl font-semibold mb-2">Креатив не найден</h2>
          <Button asChild>
            <Link href={`/dashboard/${workspaceId}/creatives`}>
              Вернуться к списку
            </Link>
          </Button>
        </div>
      </>
    );
  }

  return (
    <>
      <DashboardHeader
        breadcrumbs={[
          { label: "Главная", href: `/dashboard/${workspaceId}` },
          { label: "Креативы", href: `/dashboard/${workspaceId}/creatives` },
          { label: creative.name },
        ]}
      />

      <div className="flex flex-1 flex-col gap-4 p-4 pt-0 mt-4 max-w-3xl">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-4">
            <Button
              variant="ghost"
              size="icon"
              onClick={() => router.push(`/dashboard/${workspaceId}/creatives`)}
            >
              <ArrowLeft className="h-4 w-4" />
            </Button>
            <div>
              <div className="flex items-center gap-2">
                <h1 className="text-2xl font-bold tracking-tight">
                  {creative.name}
                </h1>
                <Badge
                  variant={
                    creative.status === "active" ? "default" : "secondary"
                  }
                >
                  {creative.status === "active" ? "Активен" : "Архив"}
                </Badge>
              </div>
              <p className="text-muted-foreground">
                {creative.placements_count} размещений
              </p>
            </div>
          </div>

          {canWrite && !isEditing && (
            <div className="flex gap-2">
              <Button variant="outline" onClick={() => setIsEditing(true)}>
                <Pencil className="h-4 w-4 mr-2" />
                Редактировать
              </Button>
              <AlertDialog>
                <AlertDialogTrigger asChild>
                  <Button variant="outline">
                    <Archive className="h-4 w-4 mr-2" />
                    В архив
                  </Button>
                </AlertDialogTrigger>
                <AlertDialogContent>
                  <AlertDialogHeader>
                    <AlertDialogTitle>Архивировать креатив?</AlertDialogTitle>
                    <AlertDialogDescription>
                      Креатив будет перемещён в архив. Существующие размещения
                      останутся без изменений.
                    </AlertDialogDescription>
                  </AlertDialogHeader>
                  <AlertDialogFooter>
                    <AlertDialogCancel>Отмена</AlertDialogCancel>
                    <AlertDialogAction onClick={handleArchive}>
                      Архивировать
                    </AlertDialogAction>
                  </AlertDialogFooter>
                </AlertDialogContent>
              </AlertDialog>
            </div>
          )}
        </div>

        {isEditing ? (
          <Card>
            <CardHeader>
              <CardTitle>Редактирование</CardTitle>
              <CardDescription>
                Изменения не повлияют на существующие размещения
              </CardDescription>
            </CardHeader>
            <CardContent className="space-y-4">
              <div className="space-y-2">
                <Label htmlFor="name">Название</Label>
                <Input
                  id="name"
                  value={name}
                  onChange={(e) => setName(e.target.value)}
                  disabled={isSaving}
                />
              </div>

              <div className="space-y-2">
                <Label htmlFor="text">Текст креатива</Label>
                <Textarea
                  id="text"
                  value={text}
                  onChange={(e) => setText(e.target.value)}
                  disabled={isSaving}
                  rows={10}
                  className="font-mono text-sm"
                />
                <p className="text-xs text-muted-foreground">
                  Не забудьте <code className="bg-muted px-1 rounded">{"{invite_link}"}</code>
                </p>
              </div>

              {error && (
                <div className="rounded-md bg-destructive/10 p-3 text-sm text-destructive">
                  {error}
                </div>
              )}

              <div className="flex gap-2 pt-4">
                <Button
                  variant="outline"
                  onClick={handleCancel}
                  disabled={isSaving}
                >
                  Отмена
                </Button>
                <Button onClick={handleSave} disabled={isSaving}>
                  {isSaving ? (
                    <>
                      <Loader2 className="h-4 w-4 mr-2 animate-spin" />
                      Сохранение...
                    </>
                  ) : (
                    "Сохранить"
                  )}
                </Button>
              </div>
            </CardContent>
          </Card>
        ) : (
          <Card>
            <CardHeader>
              <div className="flex items-center justify-between">
                <CardTitle>Текст креатива</CardTitle>
                <Button variant="outline" size="sm" onClick={handleCopy}>
                  {copied ? (
                    <>
                      <Check className="h-4 w-4 mr-2" />
                      Скопировано
                    </>
                  ) : (
                    <>
                      <Copy className="h-4 w-4 mr-2" />
                      Копировать
                    </>
                  )}
                </Button>
              </div>
            </CardHeader>
            <CardContent>
              <pre className="whitespace-pre-wrap text-sm bg-muted p-4 rounded-lg">
                {creative.text.replace(
                  "{invite_link}",
                  "https://t.me/+AbCdEfGhIjK"
                )}
              </pre>
              <p className="text-xs text-muted-foreground mt-2">
                <code className="bg-muted px-1 rounded">{"{invite_link}"}</code>{" "}
                заменяется уникальной ссылкой при создании размещения
              </p>
            </CardContent>
          </Card>
        )}

        {/* Quick Actions */}
        {canWrite && creative.status === "active" && (
          <Card>
            <CardHeader>
              <CardTitle>Действия</CardTitle>
            </CardHeader>
            <CardContent>
              <Button asChild>
                <Link
                  href={`/dashboard/${workspaceId}/placements/new?creative_id=${creative.id}`}
                >
                  <ExternalLink className="h-4 w-4 mr-2" />
                  Создать размещение с этим креативом
                </Link>
              </Button>
            </CardContent>
          </Card>
        )}
      </div>
    </>
  );
}