import { HttpClient, HttpParams } from '@angular/common/http';
import { Injectable, inject } from '@angular/core';

import {
  AssetResponse,
  BuildJobResponse,
  LoginResponse,
  DeletePostResponse,
  PostInput,
  PostResponse,
  PostStatus,
  PostsResponse,
  SlugResponse
} from './models';

@Injectable({ providedIn: 'root' })
export class AdminApiService {
  private readonly http = inject(HttpClient);
  private readonly baseUrl = '/api/admin';

  me() {
    return this.http.get<{ user: LoginResponse['user'] }>(`${this.baseUrl}/me`, {
      withCredentials: true
    });
  }

  login(username: string, password: string) {
    return this.http.post<LoginResponse>(
      `${this.baseUrl}/login`,
      { username, password },
      { withCredentials: true }
    );
  }

  logout() {
    return this.http.post<{ ok: boolean }>(`${this.baseUrl}/logout`, {}, { withCredentials: true });
  }

  listPosts(status: PostStatus | '', limit?: number, offset?: number) {
    let params = new HttpParams();
    if (status) {
      params = params.set('status', status);
    }
    if (limit) {
      params = params.set('limit', String(limit));
    }
    if (offset) {
      params = params.set('offset', String(offset));
    }
    return this.http.get<PostsResponse>(`${this.baseUrl}/posts`, {
      params,
      withCredentials: true
    });
  }

  getPost(id: string) {
    return this.http.get<PostResponse>(`${this.baseUrl}/posts/${id}`, {
      withCredentials: true
    });
  }

  createPost(input: PostInput) {
    return this.http.post<PostResponse>(`${this.baseUrl}/posts`, input, {
      withCredentials: true
    });
  }

  updatePost(id: string, input: PostInput) {
    return this.http.put<PostResponse>(`${this.baseUrl}/posts/${id}`, input, {
      withCredentials: true
    });
  }

  deletePost(id: string) {
    return this.http.delete<DeletePostResponse>(`${this.baseUrl}/posts/${id}`, {
      withCredentials: true
    });
  }

  publishPost(id: string) {
    return this.http.post<PostResponse & BuildJobResponse>(
      `${this.baseUrl}/posts/${id}/publish`,
      {},
      { withCredentials: true }
    );
  }

  buildPost(id: string) {
    return this.http.post<BuildJobResponse>(
      `${this.baseUrl}/posts/${id}/build`,
      {},
      { withCredentials: true }
    );
  }

  getBuildJob(id: string) {
    return this.http.get<BuildJobResponse>(`${this.baseUrl}/build-jobs/${id}`, {
      withCredentials: true
    });
  }

  uploadAsset(file: File) {
    const body = new FormData();
    body.append('file', file);
    return this.http.post<AssetResponse>(`${this.baseUrl}/assets`, body, {
      withCredentials: true
    });
  }

  generateSlug(title: string, summary: string, postId?: string) {
    return this.http.post<SlugResponse>(
      `${this.baseUrl}/slug`,
      { title, summary, postId },
      { withCredentials: true }
    );
  }
}