import { API_BASE_URL, API_TIMEOUT } from './config';

// Generic API request helper
async function apiRequest<T>(endpoint: string, options: RequestInit = {}): Promise<T> {
  const controller = new AbortController();
  const timeoutId = setTimeout(() => controller.abort(), API_TIMEOUT);

  try {
    const response = await fetch(`${API_BASE_URL}${endpoint}`, {
      headers: {
        'Content-Type': 'application/json',
        ...options.headers,
      },
      signal: controller.signal,
      ...options,
    });

    clearTimeout(timeoutId);

    if (!response.ok) {
      const errorText = await response.text();
      throw new Error(`API Error (${response.status}): ${errorText || response.statusText}`);
    }

    return response.json();
  } catch (error) {
    clearTimeout(timeoutId);
    if (error instanceof Error) {
      if (error.name === 'AbortError') {
        throw new Error('Request timeout');
      }
      throw error;
    }
    throw new Error('Unknown error occurred');
  }
}

// Outlets API
export const outletsApi = {
  getAll: async (category?: string, language = 'ko') => {
    const params = new URLSearchParams();
    if (category) params.append('category', category);
    if (language) params.append('language', language);
    const response = await apiRequest<any>(`/api/v1/outlets?${params}`);

    // API returns {"people": [...]} when category is specified
    // Extract the array from the categorized response
    if (category && response[category]) {
      return response[category];
    }
    return response;
  },

  getById: (id: string, language = 'ko') => {
    const params = new URLSearchParams({ language });
    return apiRequest(`/api/v1/outlets/${id}?${params}`);
  },
};

// Articles API
export const articlesApi = {
  getAll: (language = 'ko') => {
    const params = new URLSearchParams({ page_size: '50' });
    return apiRequest(`/api/v1/${language}/articles?${params}`);
  },

  getByOutlet: (outletId: string, language = 'ko') => {
    const params = new URLSearchParams({ page_size: '50' });
    return apiRequest(`/api/v1/${language}/outlets/${encodeURIComponent(outletId)}/articles?${params}`);
  },

  getFeatured: (limit = 10, language = 'ko') => {
    const params = new URLSearchParams({ page_size: limit.toString() });
    return apiRequest(`/api/v1/${language}/articles?${params}`);
  },

  getById: (id: string, language = 'ko', useNewsId = false) => {
    return apiRequest(`/api/v1/${language}/articles/${id}`);
  },
};

// Search API
export const searchApi = {
  search: async (
    query: string,
    type: 'all' | 'articles' | 'outlets' = 'all',
    language = 'en',
    outletId?: string
  ) => {
    const params = new URLSearchParams({
      q: query,
      type,
      language,
    });

    if (outletId) {
      params.append('outletId', outletId);
    }

    return apiRequest(`/api/v1/search?${params}`);
  },

  articles: (query: string, language = 'en') => {
    const params = new URLSearchParams({ q: query, language, limit: '20' });
    return apiRequest(`/api/v1/search/articles?${params}`);
  },
};

// Feed API for YouTube-style interface
export const feedApi = {
  getFeed: (params: {
    cursor?: string;
    limit?: number;
    filter?: 'all' | 'people' | 'topics' | 'companies';
  }) => {
    const searchParams = new URLSearchParams();
    if (params.cursor) searchParams.set('cursor', params.cursor);
    if (params.limit) searchParams.set('limit', params.limit.toString());
    if (params.filter) searchParams.set('filter', params.filter);

    return apiRequest(`/api/v1/feed?${searchParams.toString()}`);
  },

  incrementView: (articleId: string) =>
    apiRequest(`/api/v1/articles/${articleId}/view`, {
      method: 'POST',
    }),
};