package main

import (
	"bufio"
	"fmt"
	"os"
	"os/exec"
	"strings"

	alpm "github.com/Jguer/go-alpm"
	"github.com/Morganamilo/go-pacmanconf"
	"github.com/leonelquinteros/gotext"

	"github.com/Jguer/yay/v10/pkg/settings"
	"github.com/Jguer/yay/v10/pkg/text"
)

// Verbosity settings for search
const (
	numberMenu = iota
	detailed
	minimal
)

var yayVersion = "10.0.0"

var localePath = "/usr/share/locale"

// savedInfo holds the current vcs info
var savedInfo vcsInfo

// YayConf holds the current config values for yay.
var config *settings.Configuration

// Editor returns the preferred system editor.
func editor() (editor string, args []string) {
	switch {
	case config.Editor != "":
		editor, err := exec.LookPath(config.Editor)
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
		} else {
			return editor, strings.Fields(config.EditorFlags)
		}
		fallthrough
	case os.Getenv("EDITOR") != "":
		if editorArgs := strings.Fields(os.Getenv("EDITOR")); len(editorArgs) != 0 {
			editor, err := exec.LookPath(editorArgs[0])
			if err != nil {
				fmt.Fprintln(os.Stderr, err)
			} else {
				return editor, editorArgs[1:]
			}
		}
		fallthrough
	case os.Getenv("VISUAL") != "":
		if editorArgs := strings.Fields(os.Getenv("VISUAL")); len(editorArgs) != 0 {
			editor, err := exec.LookPath(editorArgs[0])
			if err != nil {
				fmt.Fprintln(os.Stderr, err)
			} else {
				return editor, editorArgs[1:]
			}
		}
		fallthrough
	default:
		fmt.Fprintln(os.Stderr)
		text.Errorln(gotext.Get("%s is not set", bold(cyan("$EDITOR"))))
		text.Warnln(gotext.Get("Add %s or %s to your environment variables", bold(cyan("$EDITOR")), bold(cyan("$VISUAL"))))

		for {
			text.Infoln(gotext.Get("Edit PKGBUILD with?"))
			editorInput, err := getInput("")
			if err != nil {
				fmt.Fprintln(os.Stderr, err)
				continue
			}

			editorArgs := strings.Fields(editorInput)
			if len(editorArgs) == 0 {
				continue
			}

			editor, err := exec.LookPath(editorArgs[0])
			if err != nil {
				fmt.Fprintln(os.Stderr, err)
				continue
			}
			return editor, editorArgs[1:]
		}
	}
}

func getInput(defaultValue string) (string, error) {
	text.Info()
	if defaultValue != "" || config.NoConfirm {
		fmt.Println(defaultValue)
		return defaultValue, nil
	}

	reader := bufio.NewReader(os.Stdin)

	buf, overflow, err := reader.ReadLine()
	if err != nil {
		return "", err
	}

	if overflow {
		return "", fmt.Errorf(gotext.Get("input too long"))
	}

	return string(buf), nil
}

func toUsage(usages []string) alpm.Usage {
	if len(usages) == 0 {
		return alpm.UsageAll
	}

	var ret alpm.Usage
	for _, usage := range usages {
		switch usage {
		case "Sync":
			ret |= alpm.UsageSync
		case "Search":
			ret |= alpm.UsageSearch
		case "Install":
			ret |= alpm.UsageInstall
		case "Upgrade":
			ret |= alpm.UsageUpgrade
		case "All":
			ret |= alpm.UsageAll
		}
	}

	return ret
}

func configureAlpm(pacmanConf *pacmanconf.Config, alpmHandle *alpm.Handle) error {
	// TODO: set SigLevel
	// sigLevel := alpm.SigPackage | alpm.SigPackageOptional | alpm.SigDatabase | alpm.SigDatabaseOptional
	// localFileSigLevel := alpm.SigUseDefault
	// remoteFileSigLevel := alpm.SigUseDefault

	for _, repo := range pacmanConf.Repos {
		// TODO: set SigLevel
		db, err := alpmHandle.RegisterSyncDB(repo.Name, 0)
		if err != nil {
			return err
		}

		db.SetServers(repo.Servers)
		db.SetUsage(toUsage(repo.Usage))
	}

	if err := alpmHandle.SetCacheDirs(pacmanConf.CacheDir); err != nil {
		return err
	}

	// add hook directories 1-by-1 to avoid overwriting the system directory
	for _, dir := range pacmanConf.HookDir {
		if err := alpmHandle.AddHookDir(dir); err != nil {
			return err
		}
	}

	if err := alpmHandle.SetGPGDir(pacmanConf.GPGDir); err != nil {
		return err
	}

	if err := alpmHandle.SetLogFile(pacmanConf.LogFile); err != nil {
		return err
	}

	if err := alpmHandle.SetIgnorePkgs(pacmanConf.IgnorePkg); err != nil {
		return err
	}

	if err := alpmHandle.SetIgnoreGroups(pacmanConf.IgnoreGroup); err != nil {
		return err
	}

	if err := alpmHandle.SetArch(pacmanConf.Architecture); err != nil {
		return err
	}

	if err := alpmHandle.SetNoUpgrades(pacmanConf.NoUpgrade); err != nil {
		return err
	}

	if err := alpmHandle.SetNoExtracts(pacmanConf.NoExtract); err != nil {
		return err
	}

	/*if err := alpmHandle.SetDefaultSigLevel(sigLevel); err != nil {
		return err
	}

	if err := alpmHandle.SetLocalFileSigLevel(localFileSigLevel); err != nil {
		return err
	}

	if err := alpmHandle.SetRemoteFileSigLevel(remoteFileSigLevel); err != nil {
		return err
	}*/

	if err := alpmHandle.SetUseSyslog(pacmanConf.UseSyslog); err != nil {
		return err
	}

	return alpmHandle.SetCheckSpace(pacmanConf.CheckSpace)
}