/**
 * Admin Clubs API Client
 * Handles all /admin/clubs endpoints
 *
 * Based on: docs/VENUE_ADMIN_DESIGN.md (Phase 0)
 * Owner: Frontend Faye
 * Created: 2025-11-05
 */

import type {
  AdminClubsResponse,
  AdminClubDetail,
  AdminApiResult,
  AdminApiError,
} from '@/src/types/admin-api';
import { getPathnameLocale } from '@/src/utils/getLocale';

// ============================================================================
// Configuration
// ============================================================================

const API_BASE_URL = process.env.NEXT_PUBLIC_PYTHON_API_URL;

if (!API_BASE_URL) {
  throw new Error('NEXT_PUBLIC_PYTHON_API_URL environment variable is not set');
}

// ============================================================================
// Helpers
// ============================================================================

/**
 * Add locale and timezone headers to requests
 */
function getLocaleHeaders(): Record<string, string> {
  const locale = typeof window !== 'undefined'
    ? getPathnameLocale(window.location.pathname) || 'en-US'
    : 'en-US';

  const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;

  return {
    'X-Locale': locale,
    'X-Timezone': timezone,
  };
}

// ============================================================================
// Error Handling
// ============================================================================

async function handleApiResponse<T>(response: Response): Promise<AdminApiResult<T>> {
  if (response.ok) {
    const data = await response.json();
    return { success: true, data };
  }

  // Handle error responses
  try {
    const error: AdminApiError = await response.json();
    return { success: false, error };
  } catch {
    // Fallback for non-JSON errors
    return {
      success: false,
      error: {
        type: 'about:blank',
        title: 'API Error',
        status: response.status,
        detail: response.statusText || 'An unexpected error occurred',
        instance: response.url,
        code: `HTTP_${response.status}`,
      },
    };
  }
}

// ============================================================================
// API Functions
// ============================================================================

/**
 * GET /admin/clubs
 * Lists all clubs the authenticated user can manage
 *
 * @param cookieHeader - Optional cookie header to forward (for SSR)
 * @returns Array of clubs or error
 */
export async function getAdminClubs(cookieHeader?: string): Promise<AdminApiResult<AdminClubsResponse>> {
  try {
    const headers: Record<string, string> = {
      'Content-Type': 'application/json',
      ...getLocaleHeaders(),
    };

    // Forward cookies for server-side rendering
    if (cookieHeader) {
      headers['Cookie'] = cookieHeader;
    }

    const response = await fetch(`${API_BASE_URL}/admin/clubs`, {
      method: 'GET',
      headers,
      credentials: cookieHeader ? 'omit' : 'include', // Use 'omit' when manually setting Cookie header
    });

    return handleApiResponse<AdminClubsResponse>(response);
  } catch (error) {
    return {
      success: false,
      error: {
        type: 'about:blank',
        title: 'Network Error',
        status: 0,
        detail: error instanceof Error ? error.message : 'Failed to connect to API',
        instance: `${API_BASE_URL}/admin/clubs`,
        code: 'NETWORK_ERROR',
      },
    };
  }
}

/**
 * GET /admin/clubs/{club_id}
 * Gets detailed information about a specific club
 *
 * @param clubId - The club ID to fetch
 * @param cookieHeader - Optional cookie header to forward (for SSR)
 * @returns Club details or error
 */
export async function getAdminClubDetail(
  clubId: number,
  cookieHeader?: string
): Promise<AdminApiResult<AdminClubDetail>> {
  try {
    const headers: Record<string, string> = {
      'Content-Type': 'application/json',
      ...getLocaleHeaders(),
    };

    // Forward cookies for server-side rendering
    if (cookieHeader) {
      headers['Cookie'] = cookieHeader;
    }

    const response = await fetch(`${API_BASE_URL}/admin/clubs/${clubId}`, {
      method: 'GET',
      headers,
      credentials: cookieHeader ? 'omit' : 'include', // Use 'omit' when manually setting Cookie header
    });

    return handleApiResponse<AdminClubDetail>(response);
  } catch (error) {
    return {
      success: false,
      error: {
        type: 'about:blank',
        title: 'Network Error',
        status: 0,
        detail: error instanceof Error ? error.message : 'Failed to connect to API',
        instance: `${API_BASE_URL}/admin/clubs/${clubId}`,
        code: 'NETWORK_ERROR',
      },
    };
  }
}

// ============================================================================
// Mock Data (for local development until staging stubs are ready)
// ============================================================================

export const MOCK_CLUBS: AdminClubsResponse = [
  {
    club_id: 1,
    name: 'Central Padel Geneva',
    timezone: 'Europe/Zurich',
    courts: 4,
  },
  {
    club_id: 2,
    name: 'Riverside Tennis Lausanne',
    timezone: 'Europe/Zurich',
    courts: 6,
  },
];

export const MOCK_CLUB_DETAIL: AdminClubDetail = {
  club: {
    club_id: 1,
    name: 'Central Padel Geneva',
    timezone: 'Europe/Zurich',
  },
  courts: [
    {
      court_id: 1,
      name: 'Court 1',
      created_at: '2024-01-01T00:00:00Z',
      updated_at: '2024-01-01T00:00:00Z',
    },
    {
      court_id: 2,
      name: 'Court 2',
      created_at: '2024-01-01T00:00:00Z',
      updated_at: '2024-01-01T00:00:00Z',
    },
    {
      court_id: 3,
      name: 'Court 3',
      created_at: '2024-01-01T00:00:00Z',
      updated_at: '2024-01-01T00:00:00Z',
    },
  ],
  slot_definitions: [],
  upcoming_slots: [],
  provider: {
    remote_type: 'local',
    capabilities: {
      manages_slot_storage: true,
      supports_payment_verification: false,
    },
  },
};