package config

import (
	"fmt"
	"os"
	"time"

	"github.com/spf13/viper"
)

// Config almacena las configuraciones globales
type Config struct {
	DBHost            string        `mapstructure:"DB_HOST"`
	DBPort            int           `mapstructure:"DB_PORT"`
	DBUser            string        `mapstructure:"DB_USER"`
	DBPassword        string        `mapstructure:"DB_PASSWORD"`
	DBName            string        `mapstructure:"DB_NAME"`
	DBMaxOpenConns    int           `mapstructure:"DB_MAX_OPEN_CONNS"`
	DBMaxIdleConns    int           `mapstructure:"DB_MAX_IDLE_CONNS"`
	DBConnMaxLifetime time.Duration `mapstructure:"DB_CONN_MAX_LIFETIME"`

	// Redis
	RedisHost      string        `mapstructure:"REDIS_HOST"`
	RedisPort      int           `mapstructure:"REDIS_PORT"`
	RedisPassword  string        `mapstructure:"REDIS_PASSWORD"`
	RedisDB        int           `mapstructure:"REDIS_DB"`
	RedisTTL       time.Duration `mapstructure:"REDIS_TTL"` // tiempo de vida por defecto de claves
	RedisSubscribe string        `mapstructure:"REDIS_SUBSCRIBE"`

	LogFilePath   string `mapstructure:"LOG_FILE_PATH"`
	LogLevel      string `mapstructure:"LOG_LEVEL"`
	LogMaxSize    int    `mapstructure:"LOG_MAX_SIZE"`
	LogMaxBackups int    `mapstructure:"LOG_MAX_BACKUPS"`
	LogMaxAge     int    `mapstructure:"LOG_MAX_AGE"`
	LogCompress   bool   `mapstructure:"LOG_COMPRESS"`
	Environment   string `mapstructure:"ENVIRONMENT"`

	WhereUnitsBusiness string `mapstructure:"WHERE_UNITS_BUSINESS"`
	ElasticURL         string `mapstructure:"ELASTIC_URL"`
	ElasticEnabled     bool   `mapstructure:"ELASTIC_ENABLED"`

	TimeoutSeconds int  `mapstructure:"TIMEOUT_SECONDS"`
	RetryCount     int  `mapstructure:"RETRY_COUNT"`
	TLSSkipVerify  bool `mapstructure:"TLS_SKIP_VERIFY"`
	LogRequests    bool `mapstructure:"LOG_REQUESTS"`
	EnableDebug    bool `mapstructure:"ENABLE_DEBUG"`
}

var GlobalConfig *Config

// LoadConfig carga las variables de entorno usando viper
func LoadConfig() (*Config, error) {
	viper.SetConfigName(".env")
	viper.SetConfigType("env")
	viper.AddConfigPath(".")
	viper.AutomaticEnv()

	if err := viper.ReadInConfig(); err != nil {
		fmt.Println("⚠️ No se pudo leer el archivo .env, usando variables de entorno del sistema")
	}

	var config Config
	if err := viper.Unmarshal(&config); err != nil {
		return nil, err
	}
	GlobalConfig = &config

	// --- 👇 **clave**: exportar ENCRYPTION_KEY al entorno del proceso ---
	if k := viper.GetString("ENCRYPTION_KEY"); k != "" {
		_ = os.Setenv("ENCRYPTION_KEY", k)
	}

	fmt.Println("✅ Configuración .env cargada correctamente.")
	return &config, nil
}