package config

import (
	"time"

	"github.com/spf13/viper"
)

// Config stores all configuration of the application.
// The values are read from environment variables or a config file.
type Config struct {
	// Server settings
	ServiceName     string        `mapstructure:"SERVICE_NAME"`
	FrontendURL     string        `mapstructure:"FRONTEND_URL"`
	AllowedOrigins  []string      `mapstructure:"ALLOWED_ORIGINS"`
	DBAddr          string        `mapstructure:"DB_ADDR"`
	RedisAddr       string        `mapstructure:"REDIS_ADDR"`
	RedisPassword   string        `mapstructure:"REDIS_PASSWORD"`
	RedisDB         int           `mapstructure:"REDIS_DB"`
	MigrationURL    string        `mapstructure:"MIGRATIONS_URL"`
	HTTPServerAddr  string        `mapstructure:"HTTP_SERVER_ADDR"`
	GrpcServerAddr  string        `mapstructure:"GRPC_SERVER_ADDR"`
	AuthTokenExp    time.Duration `mapstructure:"AUTH_TOKEN_EXP"`
	RefreshTokenExp time.Duration `mapstructure:"REFRESH_TOKEN_EXP"`
	MinTokenSize    int           `mapstructure:"AUTH_TOKEN_MIN_KEY_SIZE"`
	TokenKey        string        `mapstructure:"AUTH_TOKEN_SECRET"`
	TokenISS        string        `mapstructure:"AUTH_TOKEN_ISS"`
	TokenAUD        string        `mapstructure:"AUTH_TOKEN_AUD"`
	EmailSender     string        `mapstructure:"EMAIL_FROM"`
	EmailSenderName string        `mapstructure:"EMAIL_FROM_NAME"`
	EmailPassword   string        `mapstructure:"EMAIL_SMTP_PASSWORD"`
	Environment     string        `mapstructure:"ENVIRONMENT"`
}

// LoadConfig reads configuration from file or environment variables.
func LoadConfig(path string) (config Config, err error) {
	viper.AddConfigPath(path)
	viper.SetConfigName("api")
	viper.SetConfigType("env") // could be json, toml, yaml, env, etc.

	viper.AutomaticEnv() // read in environment variables that match

	err = viper.ReadInConfig()
	if err != nil {
		return
	}
	err = viper.Unmarshal(&config)
	return
}

// LoadTestConfig reads test configuration from file or environment variables.
func LoadTestConfig(path string) (config Config, err error) {
	viper.AddConfigPath(path)
	viper.SetConfigName("api_test")
	viper.SetConfigType("env") // could be json, toml, yaml, env, etc.

	viper.AutomaticEnv() // read in environment variables that match

	err = viper.ReadInConfig()
	if err != nil {
		return
	}
	err = viper.Unmarshal(&config)
	return
}