// The one browser resolver (cli/shots/browser.ts): which executable each launch kind uses, checked against a fake
// Playwright cache layout, never launching a real browser. Regression: with only chromium_headless_shell-<rev> in the
// cache, `console fill --fresh-profile` reported "Executable doesn't exist ... chromium-<rev>" although Google Chrome
// was installed (the Chrome error was hidden behind the first one; that Chrome failed because an earlier run still
// held the profile).
import { afterAll, describe, expect, test } from 'bun:test';
import { existsSync, mkdirSync, mkdtempSync, rmSync, symlinkSync, writeFileSync } from 'node:fs';
import { hostname, tmpdir } from 'node:os';
import { join } from 'node:path';
import { openConsoleBrowser } from '../cli/console/session';
import { installedBrowsers, launch, launchCandidates, launchPersistent, profileHolder } from '../cli/shots/browser';

/* eslint-disable @typescript-eslint/no-explicit-any */

const tmp = mkdtempSync(join(tmpdir(), 'sb-browser-resolve-'));
afterAll(() => rmSync(tmp, { recursive: true, force: true }));

const CHROME = '/opt/google/chrome/chrome'; // channel "chrome" on linux

/** A Playwright cache with the given builds (dirs) and a fake chromium whose launches are recorded. */
function fakeCache(name: string, builds: string[], opts: { chrome?: boolean; fail?: (o: any) => Error | null } = {}) {
  const cache = join(tmp, name);
  for (const b of builds) {
    const exe = b.startsWith('chromium-') ? join(cache, b, 'chrome-linux', 'chrome') : join(cache, b, 'chrome-linux', 'headless_shell');
    mkdirSync(join(exe, '..'), { recursive: true });
    writeFileSync(exe, '');
  }
  const fullPath = join(cache, 'chromium-1187', 'chrome-linux', 'chrome');
  const shellPresent = builds.some(b => b.startsWith('chromium_headless_shell-'));
  const calls: any[] = [];
  const start = (o: any) => {
    calls.push(o);
    const f = opts.fail?.(o);
    if (f) throw f;
    // what Playwright does: no channel + headless -> the headless shell; channel chromium / no channel headed -> full build
    const exe = o.executablePath ?? (o.channel === 'chrome' ? (opts.chrome ? CHROME : null) : (!o.channel && o.headless !== false) ? (shellPresent ? 'shell' : null) : existsSync(fullPath) ? fullPath : null);
    if (!exe) throw new Error(`browserType.launch: Executable doesn't exist at ${fullPath}`);
    return { exe, pages: () => [], newPage: async () => ({ close: async () => {} }), on: () => {}, close: async () => {} };
  };
  const pw = { executablePath: () => fullPath, launch: async (o: any) => start(o), launchPersistentContext: async (_dir: string, o: any) => start(o) };
  const exists = (p: string) => p === CHROME ? !!opts.chrome : existsSync(p);
  const installed = installedBrowsers(pw, {}, exists, 'linux');
  return { pw, calls, installed };
}

describe('launch order', () => {
  test('visible / persistent: Google Chrome, then full Chromium, never the headless shell', () => {
    expect(launchCandidates('visible', { storeboundChrome: null, chrome: CHROME, chromium: '/c' }).map(c => c.opts)).toEqual([{ channel: 'chrome' }, { channel: 'chromium' }]);
    expect(launchCandidates('visible', { storeboundChrome: null, chrome: null, chromium: null })).toEqual([]);
  });
  test('headless: headless shell, full Chromium, Google Chrome', () => {
    expect(launchCandidates('headless', { storeboundChrome: null, chrome: CHROME, chromium: '/c' }).map(c => c.opts)).toEqual([{}, { channel: 'chromium' }, { channel: 'chrome' }]);
  });
  test('STOREBOUND_CHROME first for every kind but the Chrome-only copy mode', () => {
    const i = { storeboundChrome: '/x/chrome', chrome: CHROME, chromium: null };
    expect(launchCandidates('headless', i)[0]!.opts).toEqual({ executablePath: '/x/chrome' });
    expect(launchCandidates('visible', i)[0]!.opts).toEqual({ executablePath: '/x/chrome' });
    expect(launchCandidates('chrome', i).map(c => c.opts)).toEqual([{ channel: 'chrome' }]);
  });
});

describe('fake Playwright cache', () => {
  test('headless shell only + Google Chrome: console (persistent) uses Chrome, renders use the shell', async () => {
    const f = fakeCache('shell-only', ['chromium_headless_shell-1187'], { chrome: true });
    expect(f.installed.chromium).toBeNull();
    const ctx = await launchPersistent(tmp, join(tmp, 'p1'), { headless: false }, { pw: f.pw, installed: f.installed });
    expect(ctx.exe).toBe(CHROME);
    expect(f.calls).toEqual([{ headless: false, channel: 'chrome' }]);
    // a test asking for headless still gets a real Chrome, not the shell
    const h = await launchPersistent(tmp, join(tmp, 'p1'), { headless: true }, { pw: f.pw, installed: f.installed });
    expect(h.exe).toBe(CHROME);
    const r = await launch(tmp, { headless: true }, { pw: f.pw, installed: f.installed });
    expect(r.exe).toBe('shell');
  });
  test('full Chromium only: console uses it via channel "chromium"', async () => {
    const f = fakeCache('full-only', ['chromium-1187']);
    const ctx = await launchPersistent(tmp, join(tmp, 'p2'), { headless: true }, { pw: f.pw, installed: f.installed });
    expect(ctx.exe).toBe(f.installed.chromium!);
    expect(f.calls[0].channel).toBe('chromium');
  });
  test('headless render without the shell falls back to full Chromium', async () => {
    const f = fakeCache('render-full', ['chromium-1187'], { chrome: true });
    const r = await launch(tmp, { headless: true }, { pw: f.pw, installed: f.installed });
    expect(r.exe).toBe(f.installed.chromium!);
  });
  test('nothing usable: a clear error naming what was looked for and the fix', async () => {
    const f = fakeCache('empty', ['chromium_headless_shell-1187']);
    const e = await launchPersistent(tmp, join(tmp, 'p3'), {}, { pw: f.pw, installed: f.installed }).catch(x => x as Error);
    expect((e as Error).message).toContain('no usable browser');
    expect((e as Error).message).toContain('Google Chrome');
    expect((e as Error).message).toContain('never the headless shell');
    expect((e as Error).message).toContain('bunx playwright install chromium');
    expect((e as Error).message).toContain('storebound doctor');
    expect(f.calls).toEqual([]);
  });
  test('an installed browser that fails reports its own error, not an earlier "Executable doesn\'t exist"', async () => {
    const f = fakeCache('chrome-fails', ['chromium_headless_shell-1187'], { chrome: true, fail: o => o.channel === 'chrome' ? new Error('Target page, context or browser has been closed') : null });
    const e = await launchPersistent(tmp, join(tmp, 'p4'), {}, { pw: f.pw, installed: f.installed }).catch(x => x as Error);
    expect((e as Error).message).toMatch(/^Google Chrome .* did not start: Target page/);
    expect((e as Error).message).not.toContain("Executable doesn't exist");
  });
});

describe('profile held by another browser', () => {
  test('a SingletonLock naming a live process is reported before any launch', async () => {
    const dir = join(tmp, 'locked');
    mkdirSync(dir);
    symlinkSync(`${hostname()}-${process.pid}`, join(dir, 'SingletonLock'));
    expect(profileHolder(dir)).toBe(process.pid);
    const f = fakeCache('locked-cache', [], { chrome: true });
    const e = await launchPersistent(tmp, dir, {}, { pw: f.pw, installed: f.installed }).catch(x => x as Error);
    expect((e as Error).message).toContain(`is still open in another browser (process ${process.pid})`);
    expect(f.calls).toEqual([]);
  });
  test('a stale lock (dead process, other host) is ignored', () => {
    const dir = join(tmp, 'stale');
    mkdirSync(dir);
    symlinkSync(`${hostname()}-999999`, join(dir, 'SingletonLock'));
    expect(profileHolder(dir, () => false)).toBeNull();
    expect(profileHolder(dir, () => true, 'another-host')).toBeNull();
    expect(profileHolder(join(tmp, 'no-such-dir'))).toBeNull();
  });
});

describe('console fill', () => {
  test('the persistent launch gets executablePath = STOREBOUND_CHROME when it is set', async () => {
    const exe = join(tmp, 'Chrome for Testing');
    writeFileSync(exe, '');
    const before = process.env.STOREBOUND_CHROME;
    process.env.STOREBOUND_CHROME = exe;
    try {
      const f = fakeCache('sb-chrome', ['chromium_headless_shell-1187'], { chrome: true });
      const b = await openConsoleBrowser(tmp, { store: 'apple', fresh: true, profileDir: join(tmp, 'sb-profile'), say: () => {}, launchDeps: { pw: f.pw } });
      expect(b.mode).toBe('profile');
      expect(f.calls).toHaveLength(1);
      expect(f.calls[0].executablePath).toBe(exe);
      expect(f.calls[0].channel).toBeUndefined();
      expect(f.calls[0].args).toContain('--restore-last-session');
    } finally {
      if (before === undefined) delete process.env.STOREBOUND_CHROME; else process.env.STOREBOUND_CHROME = before;
    }
  });
});