// End-to-end: keyboard use of the sidebar, focus inside dialogs, rebinding a shortcut, long folders shown in steps.
const { app, BrowserWindow } = require('electron');
const path = require('path');
const os = require('os');
const fs = require('fs');

const tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'ink-e2e-a11y-'));
const vault = path.join(tmp, 'Vault');
fs.mkdirSync(path.join(vault, 'Big'), { recursive: true });
fs.writeFileSync(path.join(vault, 'Big.md'), 'big\n');
for (let i = 0; i < 250; i++) fs.writeFileSync(path.join(vault, 'Big', `Item ${String(i).padStart(3, '0')}.md`), `item ${i}\n`);
fs.writeFileSync(path.join(vault, 'Alpha.md'), 'a\n');
fs.writeFileSync(path.join(vault, 'Beta.md'), 'b\n');
app.setPath('userData', tmp);
fs.writeFileSync(path.join(tmp, 'settings.json'), JSON.stringify({ vault, lastPage: 'Alpha', theme: 'dark', bounds: { width: 1200, height: 800 } }));
require('../electron/main.cjs');

const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
const failures = [];
const check = (name, ok, extra = '') => {
  console.log(`${ok ? 'PASS' : 'FAIL'} ${name}${extra ? ' — ' + extra : ''}`);
  if (!ok) failures.push(name);
};

app.whenReady().then(async () => {
  let win;
  for (let i = 0; i < 80 && !(win = BrowserWindow.getAllWindows()[0]); i++) await sleep(100);
  const wc = win.webContents;
  if (wc.isLoading()) await new Promise((r) => wc.once('did-finish-load', r));
  const js = (code) => wc.executeJavaScript(`(async () => { ${code} })()`);
  const key = async (keyCode, modifiers = []) => { wc.sendInputEvent({ type: 'keyDown', keyCode, modifiers }); wc.sendInputEvent({ type: 'keyUp', keyCode, modifiers }); await sleep(250); };
  const active = () => js(`const a = document.activeElement; return a && (a.dataset.id || a.getAttribute('aria-label') || a.className)`);
  try {
    await sleep(2200);

    // sidebar: arrow keys
    await js(`document.querySelector('.tree .row[data-id="Alpha"]').focus()`);
    await key('Down');
    check('Down moves to the next row', (await active()) === 'Beta', await active());
    await key('Up');
    await key('Up');
    check('Up moves back, and stops at the first row', (await active()) === 'Alpha', await active());
    await key('End');
    check('End goes to the last row', (await active()) === 'Big', await active());
    check('only the open page is a tab stop in the list', (await js(`return document.querySelectorAll('.tree .row[tabindex="0"]').length`)) === 1);

    // long folders come in steps
    await js(`document.querySelector('.tree .row[data-id="Big"]').focus()`);
    await key('Right');
    await sleep(400);
    check('a long folder shows its first 100', (await js(`return document.querySelectorAll('.tree .row[data-id^="Big/"]').length`)) === 100);
    await js(`document.querySelector('.tree .row.more').click()`);
    await sleep(300);
    check('...and "show more" adds the next 100', (await js(`return document.querySelectorAll('.tree .row[data-id^="Big/"]').length`)) === 200);

    // dialogs keep focus
    await js(`document.querySelector('.sidebar button[aria-label="Tasks"]').focus()`);
    await js(`document.querySelector('.sidebar button[aria-label="Tasks"]').click()`);
    await sleep(500);
    check('a dialog is modal and holds focus', (await js(`const d = document.querySelector('[role=dialog]'); return d.getAttribute('aria-modal') === 'true' && d.contains(document.activeElement)`)) === true);
    for (let i = 0; i < 12; i++) await key('Tab');
    check('Tab stays inside it', (await js(`return document.querySelector('[role=dialog]').contains(document.activeElement)`)) === true);
    await key('Escape');
    await sleep(600);
    check('Escape closes it and focus goes back', (await js(`return !document.querySelector('[role=dialog]') && document.activeElement?.getAttribute('aria-label') === 'Tasks'`)) === true);

    // rebinding
    await key('Y', ['control', 'shift']);
    check('Ctrl+Shift+Y does nothing yet', (await js(`return !document.querySelector('.tasks-panel')`)) === true);
    await js(`document.querySelector('.sidebar button[aria-label="Settings"]').click()`);
    await sleep(400);
    await js(`[...document.querySelectorAll('.set-nav button')].find((b) => b.textContent.includes('Shortcuts')).click()`);
    await sleep(200);
    await js(`document.querySelector('button[aria-label="Change shortcut for Tasks"]').click()`);
    await sleep(150);
    await key('Y', ['control', 'shift']);
    await sleep(400);
    const saved = JSON.parse(fs.readFileSync(path.join(tmp, 'settings.json'), 'utf8'));
    check('the new shortcut is saved', saved.prefs && saved.prefs.shortcuts && saved.prefs.shortcuts.tasks === 'Mod+Shift+Y', JSON.stringify(saved.prefs && saved.prefs.shortcuts));
    await key('Escape');
    await sleep(500);
    await key('Y', ['control', 'shift']);
    await sleep(400);
    check('...and opens Tasks', (await js(`return !!document.querySelector('.tasks-panel')`)) === true);
    await key('Escape');
    await sleep(300);
    await key('T', ['control', 'shift']);
    check('the old one no longer does', (await js(`return !document.querySelector('.tasks-panel')`)) === true);
  } catch (err) {
    check('harness', false, err.stack);
  }
  fs.rmSync(tmp, { recursive: true, force: true });
  console.log(failures.length ? `\n${failures.length} check(s) failed` : '\na11y e2e passed!');
  app.exit(failures.length ? 1 : 0);
});