/**
 * Application Configuration
 * 
 * This file contains all configuration settings for the frontend application.
 * Centralized configuration makes it easier to manage environment-specific settings.
 */

// =============================================================================
// Environment Configuration
// =============================================================================

/**
 * Set to true to use mock data instead of real backend calls.
 * Useful for development and testing without a running backend.
 */
export const NO_BACKEND_MODE = false;

/**
 * Enable debug logging for API calls
 */
export const DEBUG_MODE = true;

// =============================================================================
// API Configuration
// =============================================================================

/**
 * Base URL for the backend API server
 */
export const API_BASE_URL = 'http://localhost:8000';

/**
 * API request timeout in milliseconds
 */
export const API_TIMEOUT = 30000;

/**
 * API Endpoints
 * All backend API routes are defined here for easy reference and maintenance.
 */
export const API_ENDPOINTS = {
  // Authentication
  AUTH: {
    LOGIN: '/login',
    REGISTER: '/register',
  },

  // Assets Management
  ASSETS: {
    GET: '/assets/get',
    CREATE: '/assets/create',
    CLAIM: '/assets/claim',
    ASSIGN: '/assets/assign',
  },

  // AI Services
  AI: {
    PROXY: '/ai/proxy',
  },

  // Admin Operations
  ADMIN: {
    DECLARE_GUALE: '/admin/declare-guale',
  },
} as const;

// =============================================================================
// Helper Functions
// =============================================================================

/**
 * Build full API URL from endpoint
 * @param endpoint - API endpoint path (e.g., '/login')
 * @returns Full URL (e.g., 'http://192.168.56.103:8000/login')
 */
export function buildApiUrl(endpoint: string): string {
  return `${API_BASE_URL}${endpoint}`;
}

/**
 * Get default headers for API requests
 * @param token - Optional JWT token for authenticated requests
 * @returns Headers object
 */
export function getApiHeaders(token?: string): Record<string, string> {
  const headers: Record<string, string> = {
    'Content-Type': 'application/json',
  };

  if (token) {
    headers['Authorization'] = `Bearer ${token}`;
  }

  return headers;
}

/**
 * Log API debug information
 * Only logs when DEBUG_MODE is enabled
 */
export function logApiDebug(label: string, data: unknown): void {
  if (DEBUG_MODE) {
    console.log(`[API Debug] ${label}:`, data);
  }
}

// =============================================================================
// Mock User Configuration (for NO_BACKEND_MODE)
// =============================================================================

export const MOCK_CONFIG = {
  USER: {
    id: 999,
    username: 'MockCaptain',
    public_key: 'mock_public_key',
    is_admin: true,
    guale: false,
    tier: 'premium',
    tier_expires_at: '2026-12-31T23:59:59Z',
    last_active_at: new Date().toISOString(),
  },
  ACCESS_TOKEN: 'mock_access_token',
  RESPONSE_DELAY: 200, // milliseconds
} as const;

// =============================================================================
// AI Service Configuration
// =============================================================================

export const AI_CONFIG = {
  /**
   * Default system prompt for AI conversations
   */
  DEFAULT_SYSTEM_PROMPT: 'You are a helpful journal assistant. Help the user reflect on their thoughts and feelings.',

  /**
   * Mock response delay in milliseconds (for NO_BACKEND_MODE)
   */
  MOCK_RESPONSE_DELAY: 500,
} as const;

// =============================================================================
// Export Type Definitions
// =============================================================================

export type ApiEndpoint = typeof API_ENDPOINTS;