// UI-Screenshot-Harness — laedt die App, navigiert durch Tabs + Streamer
// + Themes und schreibt PNGs nach tmp_ui_shots/. Kein Test-Assert, nur
// visuelle Forensik fuer UI-Polishing.
//
// Run: node scripts/ui-screenshot.js
const { _electron: electron } = require('playwright');
const fs = require('fs');
const path = require('path');

const OUT_DIR = path.join(process.cwd(), 'tmp_ui_shots');

async function run() {
  fs.rmSync(OUT_DIR, { recursive: true, force: true });
  fs.mkdirSync(OUT_DIR, { recursive: true });

  const electronPath = require('electron');
  const app = await electron.launch({
    executablePath: electronPath,
    args: ['.'],
    cwd: process.cwd()
  });
  const win = await app.firstWindow();
  await win.setViewportSize({ width: 1280, height: 900 });
  await win.waitForTimeout(2500);

  const shot = async (name) => {
    const file = path.join(OUT_DIR, `${name}.png`);
    try {
      await win.screenshot({ path: file, animations: 'disabled', timeout: 8000 });
      process.stdout.write(`shot: ${name}\n`);
    } catch (e) {
      process.stdout.write(`shot FAILED: ${name} — ${String(e).split('\n')[0]}\n`);
    }
  };

  // Misst die Y-Position aller .vod-actions relativ zu ihrer Grid-Reihe.
  // Buttons in derselben Reihe muessen die gleiche bottom-Y haben.
  const checkButtonAlignment = async (label) => {
    const rows = await win.evaluate(() => {
      const cards = Array.from(document.querySelectorAll('.vod-card'));
      const byRow = {};
      for (const card of cards) {
        const actions = card.querySelector('.vod-actions');
        if (!actions) continue;
        const cardRect = card.getBoundingClientRect();
        const actRect = actions.getBoundingClientRect();
        const rowKey = Math.round(cardRect.top / 10) * 10; // Reihe nach top gruppieren
        (byRow[rowKey] = byRow[rowKey] || []).push(Math.round(actRect.top));
      }
      // Pro Reihe: max-min der button-tops (sollte ~0 sein wenn aligned)
      const result = [];
      for (const [row, tops] of Object.entries(byRow)) {
        if (tops.length < 2) continue;
        result.push({ row: Number(row), spread: Math.max(...tops) - Math.min(...tops), count: tops.length });
      }
      return result;
    });
    const maxSpread = rows.reduce((m, r) => Math.max(m, r.spread), 0);
    process.stdout.write(`  [align ${label}] rows=${rows.length} maxButtonTopSpread=${maxSpread}px ${maxSpread <= 2 ? 'OK' : 'MISALIGNED'}\n`);
    return maxSpread;
  };

  // 1. Settings tab (alle Inputs/Selects/Checkboxes sichtbar)
  await win.evaluate(() => window.showTab('settings'));
  await win.waitForTimeout(600);
  await shot('01-settings');

  // 2. Streamer mit vielen VODs + variablen Titel-Laengen
  const streamers = ['xqc', 'papaplatte', 'xrohat'];
  for (const s of streamers) {
    await win.evaluate(() => window.showTab('vods'));
    await win.evaluate(async (name) => { await window.selectStreamer(name); }, s);
    await win.waitForTimeout(4500);
    const count = await win.locator('.vod-card').count();
    process.stdout.write(`  ${s}: ${count} vod-cards\n`);
    await checkButtonAlignment(s);
    await shot(`02-vods-${s}`);
  }

  // 3. Queue (mit einem item drin)
  await win.evaluate(() => window.showTab('vods'));
  const vodCount = await win.locator('.vod-card').count();
  if (vodCount > 0) {
    await win.locator('.vod-card .vod-btn.primary').first().click().catch(() => {});
    await win.waitForTimeout(800);
  }
  await win.evaluate(() => window.showTab('queue'));
  await win.waitForTimeout(500);
  await shot('03-queue');

  // 4. Clips / Cutter / Merge / Stats / Archive tabs
  for (const tab of ['clips', 'cutter', 'merge', 'stats', 'archive']) {
    await win.evaluate((t) => window.showTab(t), tab);
    await win.waitForTimeout(600);
    await shot(`04-tab-${tab}`);
  }

  // 5. Themes durchschalten — auf VODs-Tab mit xqc geladen
  await win.evaluate(() => window.showTab('vods'));
  await win.evaluate(async () => { await window.selectStreamer('xqc'); });
  await win.waitForTimeout(3500);
  for (const theme of ['discord', 'youtube', 'apple', 'light', 'twitch']) {
    await win.evaluate((t) => window.changeTheme(t), theme);
    await win.waitForTimeout(500);
    await shot(`05-theme-${theme}`);
  }

  // 6. Settings im Light-Theme (Input-Backgrounds pruefen)
  await win.evaluate(() => window.changeTheme('light'));
  await win.evaluate(() => window.showTab('settings'));
  await win.waitForTimeout(600);
  await shot('06-settings-light');
  await win.evaluate(() => window.changeTheme('twitch'));

  await app.close();
  process.stdout.write(`\nDone. PNGs in ${OUT_DIR}\n`);
}

run().catch((e) => { process.stderr.write(String(e) + '\n'); process.exit(1); });