// alternate.js

const fs = require("fs");
const path = require("path");
const { spawn } = require("child_process");

// Ensure output folder exists
if (!fs.existsSync("output")) fs.mkdirSync("output");

// Step 1: Search for files
const inputDir = "inputs";
const files = fs.readdirSync(inputDir);

const audioFile = files.find(f => f.toLowerCase().endsWith(".wav"));
const imageFile = files.find(f => f.toLowerCase().match(/\.(jpg|jpeg|svg)$/));

if (!audioFile || !imageFile) {
  console.error("❌ Missing .wav and/or .jpg/.svg file in inputs/");
  process.exit(1);
}

const audioPath = path.join(inputDir, audioFile);
const imagePath = path.join(inputDir, imageFile);
const outputName = `output-${Date.now()}.mp4`;
const outputPath = path.join("output", outputName);

// Step 2: Convert using ffmpeg (no duration check)
console.log(`🎧 Found: ${audioFile}`);
console.log(`🖼️  Found: ${imageFile}`);
console.log(`🚀 Starting conversion → ${outputName}`);

const args = [
  "-loop", "1",
  "-i", imagePath,
  "-i", audioPath,
  "-c:v", "libx264",
  "-preset", "ultrafast",
  "-tune", "stillimage",
  "-crf", "23",
  "-c:a", "aac",
  "-shortest",
  "-pix_fmt", "yuv420p",
  "-movflags", "+faststart",
  outputPath
];

const ffmpeg = spawn("ffmpeg", args);

ffmpeg.stderr.on("data", (data) => {
  console.log(data.toString().trim()); // log raw ffmpeg output
});

ffmpeg.on("exit", (code) => {
  if (code !== 0) {
    console.error(`❌ FFmpeg exited with code ${code}`);
    return;
  }

  console.log(`✅ Conversion complete! Saved to: ${outputPath}`);
});