const { Img } = require("./paper-recognizer.js");
const chunks = [];
process.stdin.on("data", c => chunks.push(c));
process.stdin.on("end", () => {
  const buf = Buffer.concat(chunks);
  const w = buf.readUInt32LE(0);
  const h = buf.readUInt32LE(4);
  const pixels = new Uint8Array(buf.slice(8));
  
  const bgr = new Uint8Array(w * h * 3);
  for (let i = 0; i < w * h; i++) {
    const src4 = i * 4, dst3 = i * 3;
    bgr[dst3] = pixels[src4 + 2];
    bgr[dst3+1] = pixels[src4 + 1];
    bgr[dst3+2] = pixels[src4];
  }
  
  function testHsv(x, y) {
    const j = (y * w + x) * 3;
    const [h,s,v] = Img.bgrToHsv(bgr[j], bgr[j+1], bgr[j+2]);
    console.log(`HSV at (${x},${y}): H=${h.toFixed(1)} S=${s.toFixed(0)} V=${v.toFixed(0)}`);
  }
  testHsv(89, 200);
  testHsv(669, 200);
  
  const hsv = Img.bgrImageToHsv(bgr, w, h);
  const blueMask = Img.hsvInRange(hsv, w, h, 180, 260, 30, 255, 30, 220);
  let count = 0;
  for (let i = 0; i < w * h; i++) if (blueMask[i] > 0) count++;
  console.log(`Blue mask foreground: ${count}`);
  
  const morphed = Img.morphClose(blueMask, w, h, 5);
  let mCount = 0;
  for (let i = 0; i < w * h; i++) if (morphed[i] > 0) mCount++;
  console.log(`After close: ${mCount}`);
  
  const ctrs = Img.findContours(morphed, w, h);
  console.log(`Contours: ${ctrs.length}`);
  for (let i = 0; i < ctrs.length; i++) {
    const area = Img.contourArea(ctrs[i]);
    console.log(`  ${i}: ${ctrs[i].length} pts, area=${area.toFixed(0)}, rect=${JSON.stringify(Img.boundingRect(ctrs[i]))}`);
    const mr = Img.minAreaRect(ctrs[i]);
    console.log(`    mr: w=${mr.size.w.toFixed(0)} h=${mr.size.h.toFixed(0)} angle=${mr.angle.toFixed(1)}`);
  }
  
  process.exit(0);
});