/**
 * Challonge API v1 Service (DEPRECATED - REFERENCE ONLY)
 *
 * ⚠️ DEPRECATED: This service is maintained for reference purposes only.
 * Use challonge-v2.1.service.js for new development.
 *
 * Client for interacting with Challonge tournament platform API v1
 * Adapted from Discord bot for Vue 3 browser environment
 */

import { API_CONFIG } from '../utilities/constants.js';

/**
 * Get the appropriate base URL based on environment
 * Development: Use Vite proxy to avoid CORS
 * Production: Use direct API (requires backend proxy or CORS handling)
 */
function getBaseURL() {
  // In development, use Vite proxy
  if (import.meta.env.DEV) {
    return '/api/challonge/v1/';
  }
  // In production, use direct API (will need backend proxy for CORS)
  return API_CONFIG.CHALLONGE_BASE_URL;
}

/**
 * Create Challonge API v1 client
 * @param {string} apiKey - Challonge API v1 key
 * @returns {Object} API client with methods
 */
export function createChallongeV1Client(apiKey) {
  const baseURL = getBaseURL();

  /**
   * Make API request
   * @param {string} endpoint - API endpoint
   * @param {Object} options - Fetch options
   * @returns {Promise<Object>} Response data
   */
  async function makeRequest(endpoint, options = {}) {
    const cleanEndpoint = endpoint.startsWith('/')
      ? endpoint.slice(1)
      : endpoint;
    const url = new URL(`${baseURL}${cleanEndpoint}`, window.location.origin);
    url.searchParams.append('api_key', apiKey);

    if (options.params) {
      Object.entries(options.params).forEach(([key, value]) => {
        if (value !== undefined && value !== null) {
          url.searchParams.append(key, value);
        }
      });
    }

    const fetchOptions = {
      method: options.method || 'GET',
      headers: {
        'Content-Type': 'application/json',
        Accept: 'application/json',
        ...options.headers
      }
    };

    if (options.body) {
      fetchOptions.body = JSON.stringify(options.body);
    }

    try {
      const response = await fetch(url.toString(), fetchOptions);

      if (!response.ok) {
        const error = await response.json().catch(() => ({}));
        throw new Error(
          error.errors?.[0] || `HTTP ${response.status}: ${response.statusText}`
        );
      }

      return await response.json();
    } catch (error) {
      console.error('Challonge API v1 Error:', error);
      throw error;
    }
  }

  // Tournament Methods
  const tournaments = {
    list: params => makeRequest('tournaments', { params }),
    get: (id, options = {}) =>
      makeRequest(`tournaments/${id}`, {
        params: {
          include_participants: options.includeParticipants ? 1 : 0,
          include_matches: options.includeMatches ? 1 : 0
        }
      }),
    create: data =>
      makeRequest('tournaments', {
        method: 'POST',
        body: { tournament: data }
      }),
    update: (id, data) =>
      makeRequest(`tournaments/${id}`, {
        method: 'PUT',
        body: { tournament: data }
      }),
    delete: id => makeRequest(`tournaments/${id}`, { method: 'DELETE' }),
    start: (id, options = {}) =>
      makeRequest(`tournaments/${id}/start`, {
        method: 'POST',
        params: options
      }),
    finalize: id =>
      makeRequest(`tournaments/${id}/finalize`, { method: 'POST' }),
    reset: id => makeRequest(`tournaments/${id}/reset`, { method: 'POST' })
  };

  // Participant Methods
  const participants = {
    list: tournamentId =>
      makeRequest(`tournaments/${tournamentId}/participants`),
    add: (tournamentId, data) =>
      makeRequest(`tournaments/${tournamentId}/participants`, {
        method: 'POST',
        body: { participant: data }
      }),
    bulkAdd: (tournamentId, participants) =>
      makeRequest(`tournaments/${tournamentId}/participants/bulk_add`, {
        method: 'POST',
        body: { participants }
      }),
    update: (tournamentId, participantId, data) =>
      makeRequest(`tournaments/${tournamentId}/participants/${participantId}`, {
        method: 'PUT',
        body: { participant: data }
      }),
    delete: (tournamentId, participantId) =>
      makeRequest(`tournaments/${tournamentId}/participants/${participantId}`, {
        method: 'DELETE'
      }),
    checkIn: (tournamentId, participantId) =>
      makeRequest(
        `tournaments/${tournamentId}/participants/${participantId}/check_in`,
        { method: 'POST' }
      ),
    undoCheckIn: (tournamentId, participantId) =>
      makeRequest(
        `tournaments/${tournamentId}/participants/${participantId}/undo_check_in`,
        { method: 'POST' }
      ),
    randomize: tournamentId =>
      makeRequest(`tournaments/${tournamentId}/participants/randomize`, {
        method: 'POST'
      })
  };

  // Match Methods
  const matches = {
    list: (tournamentId, params = {}) =>
      makeRequest(`tournaments/${tournamentId}/matches`, { params }),
    get: (tournamentId, matchId) =>
      makeRequest(`tournaments/${tournamentId}/matches/${matchId}`),
    update: (tournamentId, matchId, data) =>
      makeRequest(`tournaments/${tournamentId}/matches/${matchId}`, {
        method: 'PUT',
        body: { match: data }
      }),
    reopen: (tournamentId, matchId) =>
      makeRequest(`tournaments/${tournamentId}/matches/${matchId}/reopen`, {
        method: 'POST'
      }),
    markAsUnderway: (tournamentId, matchId) =>
      makeRequest(
        `tournaments/${tournamentId}/matches/${matchId}/mark_as_underway`,
        { method: 'POST' }
      ),
    unmarkAsUnderway: (tournamentId, matchId) =>
      makeRequest(
        `tournaments/${tournamentId}/matches/${matchId}/unmark_as_underway`,
        { method: 'POST' }
      )
  };

  return { tournaments, participants, matches };
}

// Backwards compatibility export
export const createChallongeClient = createChallongeV1Client;