import PocketBase from 'pocketbase';
import type { Post } from '../globalInterfaces';

const PB_URL = import.meta.env.POCKETBASE_URL || 'http://127.0.0.1:8090';

export const pb = new PocketBase(PB_URL);

if (typeof window !== 'undefined') {
  const token = localStorage.getItem('auth_token');
  const userStr = localStorage.getItem('user');
  
  // Инициализируем куку из localStorage если её нет
  if (token && !document.cookie.includes('pb_auth')) {
    document.cookie = `pb_auth=${token}; path=/; max-age=${7 * 24 * 60 * 60}; SameSite=Lax`;
  }
  
  if (token && userStr) {
    try {
      const user = JSON.parse(userStr);
      pb.authStore.save(token, user);
    } catch (e) {
      console.error('Failed to restore auth:', e);
    }
  }
}

export interface PostVotes {
  id: string;
  post_id: string;
  user_id: string;
  vote_type: 'like' | 'dislike';
  created: string;
  updated: string;
}

export interface VoteStats {
  likes: number;
  dislikes: number;
  userVote: 'like' | 'dislike' | null;
}

export async function getPostVotes(postId: string): Promise<VoteStats> {
  const votes = await pb.collection('post_votes').getList(1, 1000, {
    filter: `post_id="${postId}"`,
  });

  const likes = votes.items.filter((v) => v.vote_type === 'like').length;
  const dislikes = votes.items.filter((v) => v.vote_type === 'dislike').length;

  let userVote: 'like' | 'dislike' | null = null;
  if (pb.authStore.isValid) {
    const userId = pb.authStore.model?.id;
    const userVoteRecord = votes.items.find((v) => v.user_id === userId);
    if (userVoteRecord) {
      userVote = userVoteRecord.vote_type as 'like' | 'dislike';
    }
  }

  return { likes, dislikes, userVote };
}

export async function getPostVotesStats(postId: string): Promise<{ likes: number; dislikes: number }> {
  // Получаем данные из коллекции голосов
  const votes = await pb.collection('post_votes').getList(1, 1000, {
    filter: `post="${postId}"`,
  });
  
  const likes = votes.items.filter((v: any) => v.vote_type === 'like').length;
  const dislikes = votes.items.filter((v: any) => v.vote_type === 'dislike').length;
  
  return { likes, dislikes };
}

export async function vote(postId: string, voteType: 'like' | 'dislike'): Promise<VoteStats> {
  const userId = pb.authStore.model?.id;

  if (!userId) {
    throw new Error('Требуется авторизация');
  }

  const existingVotes = await pb.collection('post_votes').getList(1, 1, {
    filter: `post_id="${postId}" && user_id="${userId}"`,
  });

  if (existingVotes.items.length > 0) {
    const existingVote = existingVotes.items[0] as unknown as PostVotes;
    
    if (existingVote.vote_type === voteType) {
      await pb.collection('post_votes').delete(existingVote.id);
    } else {
      await pb.collection('post_votes').update(existingVote.id, {
        vote_type: voteType,
      });
    }
  } else {
    await pb.collection('post_votes').create({
      post_id: postId,
      user_id: userId,
      vote_type: voteType,
    });
  }

  return getPostVotes(postId);
}

export async function getPosts(options?: {
  page?: number;
  perPage?: number;
  category?: string;
  search?: string;
}): Promise<{ posts: Post[]; total: number; page: number; totalPages: number }> {
  const page = options?.page || 1;
  const perPage = options?.perPage || 10;

  const filter: string[] = ['draft = false'];

  if (options?.category && options.category !== 'Все') {
    filter.push(`category = "${options.category}"`);
  }

  if (options?.search) {
    filter.push(`(title ~ "${options.search}" || description ~ "${options.search}")`);
  }

  const result = await pb.collection('posts').getList(page, perPage, {
    filter: filter.join(' && '),
    sort: '-date',
  });

  return {
    posts: (result.items || []) as unknown as Post[],
    total: result.totalItems || 0,
    page: result.page || 1,
    totalPages: result.totalPages || 1,
  };
}

export async function getPostBySlug(slug: string): Promise<Post | null> {
  const result = await pb.collection('posts').getList(1, 1, {
    filter: `slug="${slug}" && draft = false`,
  });

  if (!result.items || result.totalItems === 0) {
    return null;
  }

  return result.items[0] as unknown as Post;
}

export const FIXED_BLOG_CATEGORIES = [
  'ДТП',
  'Лишение прав',
  'Страховые споры',
  'Штрафы ГИБДД',
  'Возмещение ущерба',
  'Судебные дела',
];

export async function getAllCategories(): Promise<string[]> {
  return ['Все', ...FIXED_BLOG_CATEGORIES];
}

export function getPostImageUrl(post: { image?: string }): string {
  if (post.image) {
    const fileUrl = pb.files.getUrl(post, post.image);
    if (fileUrl.startsWith('/')) {
      return `${PB_URL}${fileUrl}`;
    }
    return fileUrl;
  }
  return '/images/blog/default.avif';
}

export async function getPostViews(postId: string): Promise<number> {
  try {
    const post = await pb.collection('posts').getOne(postId);
    return post.views || 0;
  } catch {
    return 0;
  }
}

export async function incrementPostViews(postId: string): Promise<number> {
  const post = await pb.collection('posts').getOne(postId);
  const newViews = (post.views || 0) + 1;
  await pb.collection('posts').update(postId, { views: newViews });
  return newViews;
}