package config

import (
	"os"
	"time"
)

type Config struct {
	Server   ServerConfig
	Database DatabaseConfig
	JWT      JWTConfig
}

type ServerConfig struct {
	Port string
	Mode string
}

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

type JWTConfig struct {
	Secret     string
	ExpireTime time.Duration
}

func Load() *Config {
	return &Config{
		Server: ServerConfig{
			Port: getEnv("SERVER_PORT", "8080"),
			Mode: getEnv("GIN_MODE", "debug"),
		},
		Database: DatabaseConfig{
			Host:     getEnv("DB_HOST", "localhost"),
			Port:     getEnv("DB_PORT", "5432"),
			User:     getEnv("DB_USER", "postgres"),
			Password: getEnv("DB_PASSWORD", "postgres"),
			Name:     getEnv("DB_NAME", "kefu_sys"),
			SSLMode:  getEnv("DB_SSLMODE", "disable"),
		},
		JWT: JWTConfig{
			Secret:     getEnv("JWT_SECRET", "kefu-sys-secret-key"),
			ExpireTime: 24 * time.Hour,
		},
	}
}

func (d *DatabaseConfig) DSN() string {
	return "host=" + d.Host + " port=" + d.Port + " user=" + d.User +
		" password=" + d.Password + " dbname=" + d.Name + " sslmode=" + d.SSLMode
}

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