package config

import (
	"log/slog"
	"os"

	"github.com/spf13/viper"
)

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

// DB .
type DataBase struct {
	DSN string `json:"dsn" yaml:"dsn"`
}

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

// New .
func New() (*Config, error) {
	viper.SetConfigName("config")       // name of config file (without extension)
	viper.SetConfigType("yml")          // 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/tracker") // optionally look for config in the working directory

	viper.AutomaticEnv()

	viper.SetDefault("Timezone", "America/New_York")
	viper.SetDefault("Logging.Level", "DEBUG")
	viper.SetDefault("Logging.Output", "TEXT")
	viper.SetDefault("Logging.Source", "false")

	err := viper.ReadInConfig() // Find and read the config file
	if err != nil {
		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, err
}