"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,
  Copy,
  Check,
  Eye,
  LayoutList,
  Plus,
  BarChart3,
  FileText,
  Image,
  Video,
} 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 {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import {
  Tabs,
  TabsContent,
  TabsList,
  TabsTrigger,
} from "@/components/ui/tabs";
import { TelegramPostPreview } from "@/components/telegram-post-preview";
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);
  const [viewMode, setViewMode] = useState<"preview" | "data">("preview");

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

  const canWrite = hasPermission("placements_write");

  useEffect(() => {
    loadCreative();
  // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [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) {
      const errorMessage = err && typeof err === 'object' && 'detail' in err ? (err as { detail?: string }).detail ?? "Не удалось сохранить" : "Не удалось сохранить";
      setError(errorMessage);
    } finally {
      setIsSaving(false);
    }
  };

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

    try {
      await creativesApi.update(workspaceId, creativeId, { status: "archived" });
      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>
      </>
    );
  }

  const isActive = creative.status === "active";

  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">
        <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={isActive ? "default" : "secondary"}>
                  {isActive ? "Активен" : "Архив"}
                </Badge>
              </div>
              <p className="text-muted-foreground">
                {creative.placements_count} размещений
              </p>
            </div>
          </div>

          {canWrite && !isEditing && (
            <div className="flex gap-2">
              {isActive && (
                <Button
                  asChild
                  variant="outline"
                >
                  <Link href={`/dashboard/${workspaceId}/purchase-plans/${creative.project_id}?creative_id=${creative.id}`}>
                    <Plus className="h-4 w-4 mr-2" />
                    Создать размещение
                  </Link>
                </Button>
              )}
              <DropdownMenu>
                <DropdownMenuTrigger asChild>
                  <Button variant="outline">
                    Дополнительно
                  </Button>
                </DropdownMenuTrigger>
                <DropdownMenuContent align="end">
                  <DropdownMenuItem asChild>
                    <Link href={`/dashboard/${workspaceId}/purchase-plans/${creative.project_id}`}>
                      <LayoutList className="h-4 w-4 mr-2" />
                      Все размещения
                    </Link>
                  </DropdownMenuItem>
                  <DropdownMenuItem asChild>
                    <Link href={`/dashboard/${workspaceId}/analytics/placements?creative_id=${creative.id}`}>
                      <BarChart3 className="h-4 w-4 mr-2" />
                      Аналитика
                    </Link>
                  </DropdownMenuItem>
                </DropdownMenuContent>
              </DropdownMenu>
              <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>

        <div className="max-w-3xl mx-auto space-y-4">
          {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>
          ) : (
            <Tabs value={viewMode} onValueChange={(v) => setViewMode(v as "preview" | "data")}>
              <TabsList className="grid w-full grid-cols-2">
                <TabsTrigger value="preview" className="gap-2">
                  <Eye className="h-4 w-4" />
                  Preview
                </TabsTrigger>
                <TabsTrigger value="data" className="gap-2">
                  <LayoutList className="h-4 w-4" />
                  Данные
                </TabsTrigger>
              </TabsList>
              <TabsContent value="preview" className="space-y-4">
                <div className="flex items-center justify-between">
                  <h3 className="text-lg font-semibold">Предпросмотр</h3>
                  <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>
                <TelegramPostPreview
                  text={creative.text}
                  mediaItems={creative.media_items}
                  buttons={creative.buttons}
                />
              </TabsContent>
              <TabsContent value="data" className="space-y-4">
                <div className="flex items-center justify-between">
                  <h3 className="text-lg font-semibold">Данные креатива</h3>
                  <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>
                <Card>
                  <CardContent className="p-6 space-y-6">
                    <div className="grid grid-cols-2 gap-4">
                      <div>
                        <Label className="text-muted-foreground text-sm">Название</Label>
                        <p className="font-medium">{creative.name}</p>
                      </div>
                      <div>
                        <Label className="text-muted-foreground text-sm">Статус</Label>
                        <Badge variant={isActive ? "default" : "secondary"}>
                          {isActive ? "Активен" : "Архив"}
                        </Badge>
                      </div>
                      <div>
                        <Label className="text-muted-foreground text-sm">Размещений</Label>
                        <p className="font-medium">{creative.placements_count}</p>
                      </div>
                      <div>
                        <Label className="text-muted-foreground text-sm">Проект</Label>
                        <p className="font-medium">{creative.project_channel_title}</p>
                      </div>
                      <div>
                        <Label className="text-muted-foreground text-sm">Создан</Label>
                        <p className="font-medium">
                          {new Date(creative.created_at).toLocaleDateString("ru-RU", {
                            day: "numeric",
                            month: "short",
                            year: "numeric",
                          })}
                        </p>
                      </div>
                    </div>

                    {creative.media_items && creative.media_items.length > 0 && (
                      <div>
                        <Label className="text-muted-foreground text-sm mb-3 block">Медиа ({creative.media_items.length})</Label>
                        <div className="grid grid-cols-4 gap-3">
                          {creative.media_items.map((media, index) => (
                            <div key={index} className="border rounded-lg p-3 space-y-2">
                              <div className="w-8 h-8 bg-muted rounded-md flex items-center justify-center">
                                {/* eslint-disable-next-line jsx-a11y/alt-text */}
                                {media.media_type === "photo" && <Image className="h-4 w-4 text-muted-foreground" />}
                                {media.media_type === "video" && <Video className="h-4 w-4 text-muted-foreground" />}
                                {media.media_type === "animation" && <FileText className="h-4 w-4 text-muted-foreground" />}
                              </div>
                              <div>
                                <p className="text-xs font-medium capitalize">{media.media_type}</p>
                                <p className="text-[10px] text-muted-foreground font-mono">
                                  {media.media_file_id.slice(0, 10)}...
                                </p>
                              </div>
                            </div>
                          ))}
                        </div>
                      </div>
                    )}

                    {creative.buttons && creative.buttons.length > 0 && (
                      <div>
                        <Label className="text-muted-foreground text-sm mb-3 block">Кнопки ({creative.buttons.length})</Label>
                        <div className="space-y-2">
                          {creative.buttons.map((button, index) => (
                            <div key={index} className="border rounded-lg p-3 flex items-center justify-between">
                              <div>
                                <p className="font-medium text-sm">{button.text}</p>
                                <p className="text-xs text-muted-foreground font-mono">
                                  {button.url}
                                </p>
                              </div>
                            </div>
                          ))}
                        </div>
                      </div>
                    )}

                    <div>
                      <Label className="text-muted-foreground text-sm mb-3 block">Текст</Label>
                      <div className="border rounded-lg p-4 bg-muted">
                        <pre className="text-sm whitespace-pre-wrap font-mono">
                          {creative.text}
                        </pre>
                      </div>
                    </div>
                  </CardContent>
                </Card>
              </TabsContent>
            </Tabs>
          )}
        </div>
      </div>
    </>
  );
}