package main

import (
	"flag"
	"fmt"
	"os"
	"path"

	"github.com/FooSoft/lazarus/formats/dat"
	"github.com/FooSoft/lazarus/formats/dcc"
)

func loadPalette(path string) (*dat.Palette, error) {
	fp, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer fp.Close()
	return dat.NewFromReader(fp)
}

func loadSprite(path string) (*dcc.Sprite, error) {
	fp, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer fp.Close()
	return dcc.NewFromReader(fp)
}

func extractSprite(spritePath string, palette *dat.Palette, targetDir string) error {
	_, err := loadSprite(spritePath)
	if err != nil {
		return err
	}

	return nil
}

func main() {
	targetDir := flag.String("target", ".", "target directory")
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "Usage: %s [options] palette_file [dcc_files]\n", path.Base(os.Args[0]))
		fmt.Fprintf(os.Stderr, "Parameters:\n\n")
		flag.PrintDefaults()
	}

	flag.Parse()

	if flag.NArg() < 1 {
		flag.Usage()
		os.Exit(2)
	}

	palette, err := loadPalette(flag.Arg(0))
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}

	for i := 1; i < flag.NArg(); i++ {
		if err := extractSprite(flag.Arg(1), palette, *targetDir); err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(1)
		}
	}
}