package main

import (
	"flag"
	"fmt"
	"os"

	"PackageManager/Client/Database"
	"PackageManager/Client/Filesystem"
	"PackageManager/Client/Package"
	"PackageManager/Color"
	"PackageManager/Helper"
	"PackageManager/Variables"
)

func init() {
	var (
		e error
	)
	_, e = os.Stat(Variables.ConfigDir)
	if os.IsNotExist(e) {
		os.MkdirAll(Variables.ConfigDir, 0644)
	} else if e != nil {
		panic(e)
	}
}

func HelpMsg() {
	var helpMsg string
	helpMsg = `Usage of %s:

General:
	-V | -verbose
		Verbose output

Filesystem diff:
	-Af | -add-files
		Add files

	-Cf | -commit
		Add files

	-Fd | -fs-diff
		Filesystem diff

	-Rf | -reset
		Reset added files
	
	-Cp | -create-pkg
		Create package from fs diff
	
	-Il | -install-local
		Install package from local tarball

	-ignore-deps-check
		Skip dependancies check
`
	helpMsg = fmt.Sprintf(helpMsg, os.Args[0])
	fmt.Println(helpMsg)
}

func main() {
	var (
		getFilesystemDiffFlag     bool
		getFilesystemDiffFlagLong bool
		addFileDiffFlag           bool
		addFileDiffFlagLong       bool
		commitAddedFilesFlag      bool
		commitAddedFilesFlagLong  bool
		resetAddedFilesFlag       bool
		resetAddedFilesFlagLong   bool

		createPackageFlag           bool
		createPackageFlagLong       bool
		installLocalPackageFlag     bool
		installLocalPackageFlagLong bool
		ignoreDepsCheckFlag         bool

		verboseOutputFlag     bool
		verboseOutputFlagLong bool

		e error
	)

	flag.Usage = HelpMsg

	e = Helper.CheckRoot()
	if e != nil {
		fmt.Println(Color.Fatal(e))
		return
	}

	e = Database.InitDB()
	if e != nil {
		panic(e)
	}

	defer Database.DB.Close()
	defer Database.FsDB.Close()

	// TODO: Rework usage function

	// Initialise flags
	flag.BoolVar(&verboseOutputFlag, "V", false, "Verbose output")
	flag.BoolVar(&verboseOutputFlagLong, "verbose", false, "Verbose output")

	flag.BoolVar(&getFilesystemDiffFlag, "Fd", false, "Filesystem diff")
	flag.BoolVar(&getFilesystemDiffFlagLong, "fs-diff", false, "Filesystem diff")

	flag.BoolVar(&addFileDiffFlag, "Af", false, "Add files")
	flag.BoolVar(&addFileDiffFlagLong, "add-files", false, "Add files")

	flag.BoolVar(&commitAddedFilesFlag, "Cf", false, "Commit files")
	flag.BoolVar(&commitAddedFilesFlagLong, "commit", false, "Commit files")

	flag.BoolVar(&resetAddedFilesFlag, "Rf", false, "Reset added files")
	flag.BoolVar(&resetAddedFilesFlagLong, "reset", false, "Reset added files")

	flag.BoolVar(&createPackageFlag, "Cp", false, "Create package from fs diff")
	flag.BoolVar(&createPackageFlagLong, "create-pkg", false, "Create package from fs diff")

	flag.BoolVar(&installLocalPackageFlag, "Il", false, "Install package from local tarball")
	flag.BoolVar(&installLocalPackageFlagLong, "install-local", false, "Install package from local tarball")

	flag.BoolVar(&ignoreDepsCheckFlag, "ignore-deps-check", false, "Ignore dependancies check")

	flag.Parse()

	Variables.VerboseOutput = verboseOutputFlag || verboseOutputFlagLong
	Variables.IgnoreDepsCheck = ignoreDepsCheckFlag

	if getFilesystemDiffFlag || getFilesystemDiffFlagLong {
		var rootPath string = Variables.RootDir
		if len(flag.Args()) > 1 {
			flag.Usage()
			fmt.Println(Color.Fatal("Option takes one optional argument"))
			return
		}

		if len(flag.Args()) == 1 {
			rootPath = flag.Arg(0)
		}

		e = Filesystem.ShowFilesystemDiff(rootPath)
		if e != nil {
			panic(e)
		}

		return
	}

	if addFileDiffFlag || addFileDiffFlagLong {
		if len(flag.Args()) > 1 || len(flag.Args()) < 1 {
			fmt.Println(Color.Fatal("Must supply one argument"))
			flag.Usage()
			return
		}
		e = Filesystem.PickFiles(flag.Arg(0))
		if e != nil {
			panic(e)
		}
		return
	}

	if commitAddedFilesFlag || commitAddedFilesFlagLong {
		e = Filesystem.CommitFiles()
		if e != nil {
			panic(e)
		}
		return
	}

	if resetAddedFilesFlag || resetAddedFilesFlagLong {
		e = Filesystem.ResetAllPickedFiles()
		if e != nil {
			panic(e)
		}
		return
	}

	if createPackageFlag || createPackageFlagLong {
		e = Package.CreatePackage()
		if e != nil {
			panic(e)
		}
		return
	}

	if installLocalPackageFlag || installLocalPackageFlagLong {
		e = Package.InstallPackage(flag.Args())
		if e != nil {
			panic(e)
		}
		return
	}

	flag.Usage()
	fmt.Println(Color.Fatal("Nothing to do"))

	//e := Archive.TarGzip("/tmp/test", "/tmp/test.tar.gz")
	//e := Archive.UntarGzip("/tmp/test.tar.gz", "/tmp/test")
	//fmt.Println(e)
}