package config

import (
	"os"
	"strconv"

	"github.com/joho/godotenv"
)

type Config struct {
	Server           ServerConfig
	Database         DatabaseConfig
	Redis            RedisConfig
	JWT              JWTConfig
	DocumentService  DocumentServiceConfig
	Log              LogConfig
}

type ServerConfig struct {
	Port string
	Host string
}

type DatabaseConfig struct {
	Host     string
	Port     string
	User     string
	Password string
	DBName   string
	SSLMode  string
}

type RedisConfig struct {
	Host     string
	Port     string
	Password string
	DB       int
}

type JWTConfig struct {
	Secret     string
	Expiration int // в часах
}

type DocumentServiceConfig struct {
	URL string
}

type LogConfig struct {
	Level string
}

func Load() (*Config, error) {
	// Загрузка .env файла если существует
	godotenv.Load()

	return &Config{
		Server: ServerConfig{
			Port: getEnv("SERVER_PORT", "8080"),
			Host: getEnv("SERVER_HOST", "0.0.0.0"),
		},
		Database: DatabaseConfig{
			Host:     getEnv("DB_HOST", "localhost"),
			Port:     getEnv("DB_PORT", "5432"),
			User:     getEnv("DB_USER", "erp_user"),
			Password: getEnv("DB_PASSWORD", "erp_pass"),
			DBName:   getEnv("DB_NAME", "erp_mvp"),
			SSLMode:  getEnv("DB_SSLMODE", "disable"),
		},
		Redis: RedisConfig{
			Host:     getEnv("REDIS_HOST", "localhost"),
			Port:     getEnv("REDIS_PORT", "6379"),
			Password: getEnv("REDIS_PASSWORD", ""),
			DB:       getEnvAsInt("REDIS_DB", 0),
		},
		JWT: JWTConfig{
			Secret:     getEnv("JWT_SECRET", "your-secret-key"),
			Expiration: getEnvAsInt("JWT_EXPIRATION", 24),
		},
		DocumentService: DocumentServiceConfig{
			URL: getEnv("DOC_SERVICE_URL", "http://localhost:8000"),
		},
		Log: LogConfig{
			Level: getEnv("LOG_LEVEL", "info"),
		},
	}, nil
}

func getEnv(key, defaultValue string) string {
	if value := os.Getenv(key); value != "" {
		return value
	}
	return defaultValue
}

func getEnvAsInt(key string, defaultValue int) int {
	if value := os.Getenv(key); value != "" {
		if intValue, err := strconv.Atoi(value); err == nil {
			return intValue
		}
	}
	return defaultValue
}