package main

import (
	"database/sql"
	"log"
	"os"

	_ "github.com/mattn/go-sqlite3"
)

// init GD - initialize a "gallery directory" that contains gallery.sqlite,
// images, thumbs.
func cmdInit(args []string) {
	if len(args) != 1 {
		log.Fatalln("usage: GD")
	}

	gd := args[0]

	db, err := sql.Open("sqlite3", gd+"/foo.db")
	if err != nil {
		log.Fatalln(err)
	}

	// TODO: Figure out a go generate to create a Go file to create the db.
	_ = db
}

// run GD ADDRESS - run a web UI against GD on ADDRESS
func cmdRun(args []string) {
	// TODO: Use "public" from CWD for files.
}

// import GD ROOT... - add files to the "entry" table
func cmdImport(args []string) {
	// TODO
}

// sync GD ROOT... - like import, but clear table beforehands
func cmdSync(args []string) {
	// TODO
}

// check GD - see if all files are accessible
func cmdCheck(args []string) {
	// TODO
}

// thumbnail GD [SHA1...] - generate missing thumbnails, in parallel
func cmdThumbnail(args []string) {
	// TODO: Show progress.
}

// dhash GD HASHER [SHA1...] - generate perceptual hash from thumbnails
func cmdDhash(args []string) {
	// TODO
}

var commands = map[string]struct {
	handler func(args []string)
}{
	"init":      {cmdInit},
	"run":       {cmdRun},
	"import":    {cmdImport},
	"sync":      {cmdSync},
	"check":     {cmdCheck},
	"thumbnail": {cmdThumbnail},
	"dhash":     {cmdDhash},
}

func main() {
	if len(os.Args) <= 2 {
		log.Fatalln("Missing arguments")
	}

	cmd, ok := commands[os.Args[1]]
	if !ok {
		log.Fatalln("Unknown command: " + os.Args[1])
	}

	cmd.handler(os.Args[2:])
}