package config

import (
	"fmt"

	"git.eeqj.de/sneak/gohttpserver/internal/globals"
	"git.eeqj.de/sneak/gohttpserver/internal/logger"
	"github.com/rs/zerolog"
	"github.com/spf13/viper"
	"go.uber.org/fx"

	// spooky action at a distance!
	// this populates the environment
	// from a ./.env file automatically
	// for development configuration.
	// .env contents should be things like
	// `DBURL=postgres://user:pass@.../`
	// (without the backticks, of course)
	_ "github.com/joho/godotenv/autoload"
)

type ConfigParams struct {
	Globals globals.Globals
	Logger  logger.Logger
}

type Config struct {
	DBURL           string
	Debug           bool
	MaintenanceMode bool
	MetricsPassword string
	MetricsUsername string
	Port            int
	SentryDSN       string
	params          ConfigParams
	log             *zerolog.Logger
}

func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
	log := params.Logger.Get()
	name := params.Globals.Appname

	viper.SetConfigName(name)
	viper.SetConfigType("yaml")
	// path to look for the config file in:
	viper.AddConfigPath(fmt.Sprintf("/etc/%s", name))
	// call multiple times to add many search paths:
	viper.AddConfigPath(fmt.Sprintf("$HOME/.config/%s", name))
	// viper.SetEnvPrefix(strings.ToUpper(s.appname))
	viper.AutomaticEnv()

	viper.SetDefault("DEBUG", "false")
	viper.SetDefault("MAINTENANCE_MODE", "false")
	viper.SetDefault("PORT", "8080")
	viper.SetDefault("DBURL", "")
	viper.SetDefault("SENTRY_DSN", "")
	viper.SetDefault("METRICS_USERNAME", "")
	viper.SetDefault("METRICS_PASSWORD", "")

	if err := viper.ReadInConfig(); err != nil {
		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
			// Config file not found; ignore error if desired
		} else {
			// Config file was found but another error was produced
			log.Panic().
				Err(err).
				Msg("config file malformed")
		}
	}

	s := &Config{
		DBURL:           viper.GetString("DBURL"),
		Debug:           viper.GetBool("debug"),
		Port:            viper.GetInt("PORT"),
		SentryDSN:       viper.GetString("SENTRY_DSN"),
		MaintenanceMode: viper.GetBool("MAINTENANCE_MODE"),
		MetricsUsername: viper.GetString("METRICS_USERNAME"),
		MetricsPassword: viper.GetString("METRICS_PASSWORD"),
		log:             log,
	}

	if s.Debug {
		params.Logger.EnableDebugLogging()
		s.log = params.Logger.Get()
	}

	return s, nil
}