package config

import (
	"log/slog"
	"os"

	"github.com/spf13/viper"
)

// Config .
type Config struct {
	MySubaru MySubaru `json:"mysubaru" yaml:"mysubaru"`
	Timezone string   `json:"timezone" yaml:"timezone"`
	Logging  *Logging `json:"logging" yaml:"logging"`
}

// Emporia .
type MySubaru struct {
	Credentials   Credentials `json:"credentials" yaml:"credentials"`
	Region        string      `json:"region" yaml:"region"`
	AutoReconnect bool        `json:"auto_reconnect" yaml:"auto_reconnect"`
}

// Credentials .
type Credentials struct {
	Username   string `json:"username" yaml:"username"`
	Password   string `json:"password" yaml:"password"`
	PIN        string `json:"pin" yaml:"pin"`
	DeviceID   string `json:"deviceid" yaml:"deviceid"`
	DeviceName string `json:"devicename" yaml:"devicename"`
}

// Logging .
type Logging struct {
	Level  string `json:"level" yaml:"level"`
	Output string `json:"output" yaml:"output"`
	Source bool   `json:"source,omitempty" yaml:"source,omitempty"`
}

func New() (*Config, error) {
	viper.SetConfigName("config")        // name of config file (without extension)
	viper.SetConfigType("yaml")          // REQUIRED if the config file does not have the extension in the name
	viper.AddConfigPath(".")             // optionally look for config in the working directory
	viper.AddConfigPath("/etc/mysubaru") // optionally look for config in the working directory

	viper.AutomaticEnv()

	viper.SetDefault("Timezone", "America/New_York")
	viper.SetDefault("MySubaru.AutoReconnect", true)
	viper.SetDefault("Logging.Level", "INFO")
	viper.SetDefault("Logging.Output", "TEXT")
	viper.SetDefault("Logging.Source", "false")

	err := viper.ReadInConfig() // Find and read the config file
	if err != nil {             // Handle errors reading the config file
		slog.Error("cannot open config file", "error", err.Error())
		os.Exit(1)
	}

	// viper.WatchConfig()
	// viper.OnConfigChange(func(e fsnotify.Event) {
	// 	log.Println("Config file changed:", e.Name)
	// })

	var config Config
	if err := viper.Unmarshal(&config); err != nil {
		slog.Error("cannot unmarshal config file", "error", err.Error())
		os.Exit(1)
	}

	return &config, nil
}