package config

import (
	"os"
	"path"
	"runtime"
	"strings"
	"velvettear/badger/internal/log"
	"velvettear/badger/internal/tools"

	"github.com/spf13/viper"
)

// exported function(s)
func Initialize() {
	timestamp := tools.LogTimestamp()
	configSpecified := false
	for index, arg := range os.Args {
		if arg == "-h" || arg == "--"+help {
			tools.PrintHelp()
		}
		if arg == "-c" || arg == "--"+config {
			viper.SetConfigFile(os.Args[index+1])
			configSpecified = true
		}
	}
	setDefaults()
	if !configSpecified {
		viper.SetConfigName("config")
		viper.SetConfigType("yaml")
		viper.AddConfigPath("$HOME/.config/badger/")
		viper.AddConfigPath("$HOME/.config/")
		workingDirectory, error := os.Getwd()
		for error == nil && path.Base(workingDirectory) != "badger" {
			workingDirectory = path.Dir(workingDirectory)
			if workingDirectory == "/" {
				workingDirectory = "."
				break
			}
		}
		viper.AddConfigPath(workingDirectory)
	}
	error := viper.ReadInConfig()
	if configSpecified && error != nil {
		log.FatalTimed("encountered an error parsing specified config file '"+viper.ConfigFileUsed()+"'", timestamp, error.Error())
	}
	tmp := viper.GetStringSlice(libraryFormats)
	for index, format := range tmp {
		if strings.HasPrefix(format, ".") {
			continue
		}
		tmp[index] = "." + format
	}
	viper.Set(libraryFormats, tmp)
	if viper.GetInt(concurrency) <= 0 {
		viper.Set(concurrency, runtime.NumCPU())
	}
	viper.Set(databaseJournalMode, strings.ToLower(viper.GetString(databaseJournalMode)))
	prepareFilesystem()
	if Debug() {
		log.SetLogLevel(0)
	}
	log.DebugTimed("parsed config file '"+viper.ConfigFileUsed()+"'", timestamp)
}

// unexported function(s)
func prepareFilesystem() {
	tmp := []string{
		viper.GetString(homeDirectory),
		viper.GetString(libraryDirectory),
		viper.GetString(importDirectory),
		viper.GetString(duplicatesDirectoy),
	}
	for _, directory := range tmp {
		error := tools.MkDirs(directory)
		if error != nil {
			log.Fatal("encountered an error creating directory '"+directory+"'", error.Error())
		}
	}
	// tmp = []string{}
	// for _, file := range tmp {
	// 	error := tools.CreateFile(file)
	// 	if error != nil {
	// 		log.Fatal("encountered an error creating file '"+file+"'", error.Error())
	// 	}
	// }
}

func setDefaults() {
	home := path.Join(os.TempDir(), "badger")
	// set directory defaults
	viper.SetDefault(homeDirectory, home)
	viper.SetDefault(libraryDirectory, path.Join(home, "library"))
	viper.SetDefault(importDirectory, path.Join(home, "import"))
	viper.SetDefault(duplicatesDirectoy, path.Join(home, "duplicates"))
	// set database defaults
	viper.SetDefault(databaseFile, path.Join(home, "badger.sqlite"))
	viper.SetDefault(databaseInMemory, true)
	viper.SetDefault(databaseChunkSize, 1000)
	viper.SetDefault(databaseBusyTimeout, 10000)
	viper.SetDefault(databaseJournalMode, "off")
	// set library defaults
	viper.SetDefault(libraryFormats, []string{"flac", "mp3"})
	viper.SetDefault(concurrency, runtime.NumCPU())
	viper.SetDefault(libraryChangedetectionModified, true)
	viper.SetDefault(libraryChangedetectionSize, true)
	viper.SetDefault(libraryChangedetectionChecksum, false)
	viper.SetDefault(libraryDuplicatesAction, "log")
	viper.SetDefault(libraryDuplicatesFormatMismatch, true)
	viper.SetDefault(libraryDuplicatesUseFingerprint, true)
	viper.SetDefault(libraryDuplicatesFingerprintThreshold, 0.95)
	// set api defaults
	viper.SetDefault(apiListen, "localhost")
	viper.SetDefault(apiPort, 3333)
	// set other defaults
	viper.SetDefault(debug, false)
	viper.SetDefault(help, false)
}