package main

import (
	"flag"
	"fmt"
	"os"

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

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

	-Rl | -remove-local
		Remove 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
		uninstallPackageFlag        bool
		uninstallPackageFlagLong    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(&uninstallPackageFlag, "Rl", false, "Uninstall local package")
	flag.BoolVar(&uninstallPackageFlagLong, "remove-local", false, "Uninstall local package")

	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
	}

	if uninstallPackageFlag || uninstallPackageFlagLong {
		e = Package.UninstallPackage(flag.Args())
		if e != nil {
			panic(e)
		}
		return
	}

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