package optimizeImage

import (
	"fmt"
	"os"
	"os/exec"
	"strings"
)

var ImageExts = map[string]bool{
	".jpeg": true,
	".jpg":  true,
	".png":  true,
	".gif":  true,
	".bmp":  true,
	".tiff": true,
	".tif":  true,
	".webp": true,
}

const touchedFile = ".touched"

var Touched = loadTouched()

func OptimizeImage(path string) {

	fmt.Println("optiimg")
	cmd := exec.Command("mogrify",
		"-strip",
		"-interlace", "Plane",
		"-sampling-factor", "4:2:0",
		"-resize", "5000x3000",
		"-quality", "80%",
		path,
	)

	out, err := cmd.CombinedOutput()
	if err != nil {
		fmt.Printf("Error optimizing %s: %v\n%s", path, err, out)
	} else {
		markTouched(path)
		fmt.Printf("Optimized %s\n", path)
	}
}

func loadTouched() map[string]bool {
	set := map[string]bool{}
	data, err := os.ReadFile(touchedFile)
	if err != nil {
		return set
	}
	for _, line := range strings.Split(string(data), "\n") {
		line = strings.TrimSpace(line)
		if line != "" && !set[line] {
			set[line] = true
		}
	}
	return set
}

func markTouched(path string) {
	f, err := os.OpenFile(touchedFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		fmt.Printf("Error updating %s: %v\n", touchedFile, err)
		return
	}
	defer f.Close()

	if _, err := fmt.Fprintln(f, path); err == nil {
		Touched[path] = true
	}
}