/**
 * Sync dish photos from ftp-images/ → public/images/dishes/
 * - Matches folders by menu item id (e.g. ftp-images/bilder-bp/chicken-biryani/bild/)
 * - Center-crops to 4:3, resizes to 1200×900, exports unified JPEG
 */

import { execSync } from 'node:child_process';
import fs from 'node:fs';
import path from 'node:path';
import { menuCategories } from '../infrastructure/menu/static-menu-data';
import { videoBaseName } from '../application/media/asset-resolver';

const ROOT = path.resolve(__dirname, '..');
const FTP_ROOT = path.join(ROOT, 'ftp-images/bilder-bp');
const OUT_DIR = path.join(ROOT, 'public/images/dishes');
const TARGET_W = 1200;
const TARGET_H = 900;
const JPEG_QUALITY = 88;

/** Menu ids that share another dish's ftp photo (main bilder-bp folder) */
const FTP_ALIASES: Record<string, string> = {

};

/** Menu id → folder name under ftp-images/bilder-bp/sweets/ */
const SWEETS_FOLDERS: Record<string, string> = {
  'namakpare': 'namak-paray',
  'shakar-paray': 'Shakar paray',
  'chocolate-barfi': 'chochlate-barfi',
  'pistachio-barfi': 'pistacho-barfi',
};

function pickLargestImage(dir: string): string | null {
  if (!fs.existsSync(dir)) return null;

  const files = fs
    .readdirSync(dir, { withFileTypes: true })
    .flatMap((entry) => {
      const full = path.join(dir, entry.name);
      if (entry.isDirectory()) return [];
      if (!/\.(jpe?g|png|webp)$/i.test(entry.name)) return [];
      return [{ full, size: fs.statSync(full).size }];
    })
    .sort((a, b) => b.size - a.size);

  return files[0]?.full ?? null;
}

function findSourceImage(dishId: string): string | null {
  const mainFolder = FTP_ALIASES[dishId] ?? dishId;
  const sweetsFolder = SWEETS_FOLDERS[dishId] ?? dishId;

  const candidates = [
    path.join(FTP_ROOT, mainFolder, 'bild'),
    path.join(FTP_ROOT, 'sweets', sweetsFolder, 'bild'),
    path.join(FTP_ROOT, 'sweets', sweetsFolder),
  ];

  for (const dir of candidates) {
    const found = pickLargestImage(dir);
    if (found) return found;
  }

  return null;
}

function run(cmd: string) {
  execSync(cmd, { stdio: 'pipe' });
}

function processToJpeg(src: string, dest: string) {
  const tmp = path.join(OUT_DIR, `.tmp-${path.basename(dest)}`);
  fs.mkdirSync(OUT_DIR, { recursive: true });

  // Normalize to JPEG working copy
  run(`sips -s format jpeg "${src}" --out "${tmp}"`);

  const width = Number(
    execSync(`sips -g pixelWidth "${tmp}"`).toString().match(/pixelWidth: (\d+)/)?.[1]
  );
  const height = Number(
    execSync(`sips -g pixelHeight "${tmp}"`).toString().match(/pixelHeight: (\d+)/)?.[1]
  );

  if (!width || !height) throw new Error(`Could not read dimensions for ${src}`);

  const targetAspect = TARGET_W / TARGET_H;
  const sourceAspect = width / height;

  let cropW = width;
  let cropH = height;
  let offsetX = 0;
  let offsetY = 0;

  if (sourceAspect > targetAspect) {
    cropW = Math.round(height * targetAspect);
    offsetX = Math.round((width - cropW) / 2);
  } else if (sourceAspect < targetAspect) {
    cropH = Math.round(width / targetAspect);
    offsetY = Math.round((height - cropH) / 2);
  }

  run(
    `sips --cropToHeightWidth ${cropH} ${cropW} --cropOffset ${offsetY} ${offsetX} "${tmp}"`
  );
  run(
    `sips -z ${TARGET_H} ${TARGET_W} -s format jpeg -s formatOptions ${JPEG_QUALITY} "${tmp}" --out "${dest}"`
  );

  if (fs.existsSync(tmp)) fs.unlinkSync(tmp);
}

function main() {
  const written = new Set<string>();
  let synced = 0;
  let skipped = 0;

  for (const category of menuCategories) {
    for (const item of category.items) {
      const src = findSourceImage(item.id);
      if (!src) {
        skipped++;
        console.log(`  skip (no ftp image): ${item.id}`);
        continue;
      }

      const outputs = new Set<string>();
      if (item.image) outputs.add(path.join(OUT_DIR, item.image));

      if (item.video) {
        const base = videoBaseName(item.video);
        outputs.add(path.join(OUT_DIR, `${base}-poster.jpg`));
        outputs.add(path.join(OUT_DIR, `${base}-optimized-poster.jpg`));
      }

      for (const out of outputs) {
        if (written.has(out)) continue;
        processToJpeg(src, out);
        written.add(out);
        console.log(`  ✓ ${path.basename(out)} ← ${item.id}`);
      }

      synced++;
    }
  }

  console.log(`\nDone: ${synced} dishes synced, ${skipped} without ftp source, ${written.size} files written.`);
}

main();