package config

import (
	"fmt"

	"github.com/spf13/viper"
)

type AppConfig struct {
	LogFile        string `yaml:"log_file"`
	LogDir         string `yaml:"log_dir"`
	LogMaxSizeMB   int    `yaml:"log_max_size_mb"`
	LogMaxBackups  int    `yaml:"log_max_backups"`
	LogMaxAgeDays  int    `yaml:"log_max_age_days"`
	LogCompression bool   `yaml:"log_compression"`
	LogAddSource   bool   `yaml:"log_add_source"`

	/*
		how long (in seconds) a user needs to be in vc in order to generate a
		UserActive event
	*/
	VoiceActivityThresholdSeconds int `yaml:"voice_activity_threshold_seconds"`

	/*
		how long (in milliseconds) a voice activity timer sleeps at a time between
		context cancellation checks.

		a higher value means the function sleeps longer which could be
		useful for some reason in the future

		a higher value also means that the timer could take longer to cancel.

		current recommended value is 1000ms.
	*/
	VoiceActivityTimerSleepIntervalMillis int `yaml:"voice_activity_timer_sleep_interval_millis"`
}

var config *AppConfig

func init() {
	setDefaults()
	viper.Unmarshal(&config)
}

func Get() *AppConfig {
	return config
}

func GetDefaultConfig() *AppConfig {
	var config *AppConfig
	setDefaults()
	viper.Unmarshal(&config)
	return config
}

func Init() error {
	setDefaults()

	// automatically populate config with any matching environment vars
	viper.SetEnvPrefix("BB")
	viper.AutomaticEnv()

	viper.SetConfigName("config")
	viper.SetConfigType("yaml")
	viper.AddConfigPath(".")

	err := viper.ReadInConfig()
	if err != nil {
		return fmt.Errorf("error reading configs: %s", err)
	}

	err = viper.Unmarshal(&config)
	if err != nil {
		return fmt.Errorf("error unmarshaling configs: %s", err)
	}

	return nil
}

func setDefaults() {
	viper.SetDefault("LogFile", "bingobot.log")
	viper.SetDefault("LogDir", "log")
	viper.SetDefault("LogMaxSizeMB", 500)
	viper.SetDefault("LogMaxBackups", 3)
	viper.SetDefault("LogMaxAgeDays", 365)
	viper.SetDefault("LogCompression", false)
	viper.SetDefault("LogAddSource", true)
	viper.SetDefault("VoiceActivityThresholdSeconds", 600)
	viper.SetDefault("VoiceActivityTimerSleepIntervalMillis", 1000)
}