package config

import (
	"context"
	"log/slog"
	"os"
	"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      *Log `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 {
	cfg := Config{
		Log: &Log{
			SLogLevel: new(slog.LevelVar),
		},
	}

	// Initialize Logger
	cfg.Log.Log = slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
		Level: cfg.Log.SLogLevel,
		ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
			if a.Key == slog.LevelKey {
				level := a.Value.Any().(slog.Level)
				levelLabel, exists := LevelNames[level]
				if !exists {
					levelLabel = level.String()
				}

				a.Value = slog.StringValue(levelLabel)
			}
			return a
		},
	}))
	cfg.Log.Ctx = context.Background()

	return cfg
}