import { z } from 'zod';

// Environment variables
const envSchema = z.object({
  NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
  PORT: z.string().transform(Number).default(3000),
  HOST: z.string().default('0.0.0.0'),
  API_RATE_LIMIT_WINDOW: z.string().transform(Number).default(60000), // 1 minute
  API_RATE_LIMIT_MAX_REQUESTS: z.string().transform(Number).default(100),
  CORS_ORIGIN: z.string().default('http://localhost:5173'),
});

export const apiEnv = envSchema.parse({
  NODE_ENV: process.env.NODE_ENV,
  PORT: process.env.PORT,
  HOST: process.env.HOST,
  API_RATE_LIMIT_WINDOW: process.env.API_RATE_LIMIT_WINDOW,
  API_RATE_LIMIT_MAX_REQUESTS: process.env.API_RATE_LIMIT_MAX_REQUESTS,
  CORS_ORIGIN: process.env.CORS_ORIGIN,
});

// Rate limit configuration by tier
export const rateLimitConfig = {
  basic: {
    windowMs: 60000, // 1 minute
    maxRequests: 100,
  },
  plus: {
    windowMs: 60000,
    maxRequests: 500,
  },
  premium: {
    windowMs: 60000,
    maxRequests: 2000,
  },
};

// API versioning configuration
export const apiVersioning = {
  defaultVersion: '1',
  headerName: 'X-API-Version',
  queryParam: 'api-version',
};

// Logging configuration
export const loggingConfig = {
  level: apiEnv.NODE_ENV === 'production' ? 'info' : 'debug',
  transport: apiEnv.NODE_ENV === 'development' ? {
    target: 'pino-pretty',
    options: {
      colorize: true,
      translateTime: true,
    },
  } : undefined,
};