// testfixture renders page 1 of a PDF as upright PNG and as a 90°-rotated PNG.
package main

import (
	"fmt"
	"image"
	"image/png"
	"os"

	"github.com/gen2brain/go-fitz"
	"orientator/internal/pipeline"
)

func main() {
	if len(os.Args) < 4 {
		fmt.Println("usage: testfixture <in.pdf> <upright.png> <rotated90.png>")
		os.Exit(2)
	}
	doc, err := fitz.New(os.Args[1])
	must(err)
	defer doc.Close()
	img, err := doc.ImageDPI(0, 150)
	must(err)
	writePNG(os.Args[2], img)
	writePNG(os.Args[3], pipeline.RotateImage(img, 90))
	fmt.Println("ok")
}

func writePNG(path string, img image.Image) {
	f, err := os.Create(path)
	must(err)
	defer f.Close()
	must(png.Encode(f, img))
}

func must(err error) {
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}