package config

import (
	"log/slog"
	"reflect"
	"strconv"
	"time"
)

type Config struct {
	// time configuration
	TimeFormat    string         `default:"2006-01-02 15:04:05" env:"TIME_FORMAT"`
	TimeZoneLocal string         `default:"America/Chicago"     env:"TIME_ZONE"`
	TZLocal       *time.Location `ignored:"true"`
	TZUTC         *time.Location `ignored:"true"`

	// logging
	LogLevel int          `default:"50"   env:"log_level"`
	Log      *slog.Logger `ignored:"true"`

	// webserver
	WebServerPort         int    `default:"8080"    env:"webserver_port"`
	WebServerIP           string `default:"0.0.0.0" env:"webserver_ip"`
	WebServerReadTimeout  int    `default:"5"       env:"webserver_read_timeout"`
	WebServerWriteTimeout int    `default:"1"       env:"webserver_write_timeout"`
	WebServerIdleTimeout  int    `default:"2"       env:"webserver_idle_timeout"`
}

// New initializes the config variable for use with a prepared set of defaults.
func New() *Config {
	return &Config{}
}

func setLogLevel(cfg *Config) {
	logLevel := &slog.LevelVar{}

	switch {
	// error
	case cfg.LogLevel <= 20:
		logLevel.Set(slog.LevelError)
		cfg.Log.Info("Log level updated", "level", slog.LevelError)
	// warning
	case cfg.LogLevel > 20 && cfg.LogLevel <= 40:
		logLevel.Set(slog.LevelWarn)
		cfg.Log.Info("Log level updated", "level", slog.LevelWarn)
	// info
	case cfg.LogLevel > 40 && cfg.LogLevel <= 60:
		logLevel.Set(slog.LevelInfo)
		cfg.Log.Info("Log level updated", "level", slog.LevelInfo)
	// debug
	case cfg.LogLevel > 60:
		logLevel.Set(slog.LevelDebug)
		cfg.Log.Info("Log level updated", "level", slog.LevelDebug)
	}
	// set default logger
	slog.SetDefault(cfg.Log)
}

func printRunningConfig(cfg *Config, cfgInfo []structInfo) {
	for _, info := range cfgInfo {
		switch info.Type.String() {
		case "string":
			p := reflect.ValueOf(cfg).Elem().FieldByName(info.Name).Addr().Interface().(*string)
			cfg.Log.Debug("Running Configuration", info.Alt, *p)
		case "bool":
			p := reflect.ValueOf(cfg).Elem().FieldByName(info.Name).Addr().Interface().(*bool)
			cfg.Log.Debug("Running Configuration", info.Alt, strconv.FormatBool(*p))
		case "int":
			p := reflect.ValueOf(cfg).Elem().FieldByName(info.Name).Addr().Interface().(*int)
			cfg.Log.Debug("Running Configuration", info.Alt, strconv.FormatInt(int64(*p), 10))
		}
	}
}