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package comic
import (
"fmt"
"os/exec"
"path/filepath"
"strings"
)
// AssembleComicPDF combines comic pages into a PDF using ImageMagick.
func AssembleComicPDF(outputDir, titleSlug string, imagePaths []string) (string, error) {
if len(imagePaths) == 0 {
return "", fmt.Errorf("no comic images to assemble into PDF")
}
if _, err := exec.LookPath("convert"); err != nil {
return "", fmt.Errorf("ImageMagick 'convert' not found — install ImageMagick to generate the PDF")
}
pdfPath := filepath.Join(outputDir, titleSlug+".pdf")
args := []string{"-density", "150"}
args = append(args, imagePaths...)
args = append(args, pdfPath)
cmd := exec.Command("convert", args...)
out, err := cmd.CombinedOutput()
if err != nil {
return "", fmt.Errorf("convert failed: %w\n%s", err, strings.TrimSpace(string(out)))
}
return pdfPath, nil
}
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