// Command genicon writes the application icon for packaging.
//
//	genicon -hicolor <dir>   <dir>/<n>x<n>/apps/keeporg.png, the Linux icon theme layout
//	genicon -iconset <dir>   <dir>/icon_<n>x<n>[@2x].png, the input iconutil turns into .icns
package main

import (
	"flag"
	"fmt"
	"os"
	"path/filepath"

	"cc.tiredsysadmin.keeporg/internal/icon"
)

func main() {
	hicolor := flag.String("hicolor", "", "write a hicolor icon theme tree under this directory")
	iconset := flag.String("iconset", "", "write a macOS .iconset directory")
	flag.Parse()
	if *hicolor == "" && *iconset == "" {
		flag.Usage()
		os.Exit(2)
	}
	if *hicolor != "" {
		for _, n := range []int{16, 32, 48, 64, 128, 256, 512} {
			write(filepath.Join(*hicolor, fmt.Sprintf("%dx%d", n, n), "apps", "keeporg.png"), n)
		}
	}
	if *iconset != "" {
		for _, n := range []int{16, 32, 128, 256, 512} {
			write(filepath.Join(*iconset, fmt.Sprintf("icon_%dx%d.png", n, n)), n)
			write(filepath.Join(*iconset, fmt.Sprintf("icon_%dx%d@2x.png", n, n)), 2*n)
		}
	}
}

func write(path string, size int) {
	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
		fmt.Fprintln(os.Stderr, "genicon:", err)
		os.Exit(1)
	}
	if err := os.WriteFile(path, icon.PNG(icon.App(size)), 0o644); err != nil {
		fmt.Fprintln(os.Stderr, "genicon:", err)
		os.Exit(1)
	}
}