package main

import (
	"flag"
	"fmt"
	"os"

	"gensokyo.cafe/xmnt/cfg"
	"gensokyo.cafe/xmnt/mnt"
	"gensokyo.cafe/xmnt/msg"
)

var (
	unmount = flag.Bool("u", false, "Unmount instead of mount")
)

func main() {
	if err := cfg.LoadAuto(); err != nil {
		msg.Errorf("Failed to load config: %v", err)
		os.Exit(1)
	}

	flag.Parse()
	args := flag.Args()

	if len(args) == 0 {
		flag.Usage()
		os.Exit(1)
	}

	var name, mountPoint string
	name = args[0]
	if len(args) > 1 {
		mountPoint = args[1]
	}

	matched, err := mnt.MatchAll(name)
	if err != nil {
		msg.Errorf("Failed to find match for %q: %v", name, err)
		os.Exit(1)
	}
	if len(matched) == 0 {
		msg.Errorf("No match for %q", name)
		os.Exit(1)
	}

	if len(matched) > 1 {
		msg.Errorf("Ambiguous name %q", name)
		msg.Infof("%d matches:", len(matched))
		for _, m := range matched {
			msg.Infof("  %s", m)
		}
		os.Exit(1)
	}

	preset := matched[0]
	if mountPoint != "" {
		preset.MountPoint = mountPoint
	}
	mounter, err := mnt.MounterFromPreset(preset)
	if err != nil {
		msg.Errorf("Failed to initialize mounter: %v", err)
		os.Exit(1)
	}
	switch *unmount {
	case false:
		err = mounter.Mount()
	case true:
		err = mounter.Unmount()
	}
	if err != nil {
		msg.Errorf("%v", err)
		os.Exit(1)
	}
	msg.Infof("Success")
}

func init() {
	usageText := fmt.Sprintf("Usage: %s [options] <name> [mountpoint]\n\nOptions:\n", os.Args[0])
	argsUsageText := `
Arguments:
  name        Name or path of the device to mount. Can also be name of a preset
  mountpoint  Mount point (optional)
`

	flag.Usage = func() {
		_, _ = fmt.Fprint(flag.CommandLine.Output(), usageText)
		flag.PrintDefaults()
		_, _ = fmt.Fprintln(flag.CommandLine.Output(), argsUsageText)
	}
}