package pdf

import (
	"fmt"
	"log/slog"
	"os"
	"os/exec"
	"path/filepath"
	"time"
)

// Generate generates the CV PDF document from the JSON file.
func Generate(tempDir, input string, historyLimit time.Time, verbose bool) (string, error) {
	texFileName, err := tex(input, tempDir, historyLimit)
	if err != nil {
		return "", fmt.Errorf("unable to create the tex file; %w", err)
	}

	slog.Info("Creating the PDF document.")

	pathArg := "--path=" + tempDir

	command := exec.Command("mtxrun", pathArg, "--script", "context", texFileName)

	if verbose {
		command.Stderr = os.Stderr
		command.Stdout = os.Stdout
	}

	if err := command.Run(); err != nil {
		return "", fmt.Errorf("an error occurred when creating the PDF file; %w", err)
	}

	output := filepath.Join(tempDir, "cv.pdf")

	slog.Info("PDF document successfully created.", "filename", output)

	return output, nil
}