import { test, expect, Page } from '@playwright/test';

const TEST_PASS = 'testpass123';
let userCounter = 0;

function shortUid() {
  userCounter++;
  return `${userCounter}${Math.random().toString(36).slice(2, 7)}`;
}

// Helper: register a unique user via API, set tokens, navigate to /
async function loginViaAPI(page: Page) {
  const uid = shortUid();
  const username = `t${uid}`; // short, max ~8 chars

  const resp = await page.request.post('/api/v1/auth/register', {
    data: {
      username,
      email: `${uid}@t.co`,
      password: TEST_PASS,
    },
  });

  if (!resp.ok()) {
    throw new Error(`Register failed: ${resp.status()} ${await resp.text()}`);
  }

  const body = await resp.json();
  const tokens = body.tokens;

  await page.goto('/login');
  await page.evaluate((t: { access: string; refresh: string }) => {
    localStorage.setItem('access_token', t.access);
    localStorage.setItem('refresh_token', t.refresh);
  }, tokens);

  await page.goto('/');
  await page.locator('textarea').waitFor({ state: 'visible', timeout: 10000 });
}

test.describe('Video Generation Page - P0 Acceptance', () => {
  test.beforeEach(async ({ page }) => {
    await loginViaAPI(page);
  });

  test('P0-1: should show dark background #0a0a0f', async ({ page }) => {
    const body = page.locator('body');
    const bgColor = await body.evaluate((el: Element) => getComputedStyle(el).backgroundColor);
    expect(bgColor).toBe('rgb(10, 10, 15)');
  });

  test('P0-2: InputBar should have correct styling', async ({ page }) => {
    const bar = page.locator('textarea').locator('xpath=ancestor::div[contains(@class, "bar")]').first();
    await expect(bar).toBeVisible();

    const bgColor = await bar.evaluate((el: Element) => getComputedStyle(el).backgroundColor);
    expect(bgColor).toBe('rgb(22, 22, 30)');

    const borderRadius = await bar.evaluate((el: Element) => getComputedStyle(el).borderRadius);
    expect(borderRadius).toBe('20px');
  });

  test('P0-3: should default to universal mode with upload button and prompt', async ({ page }) => {
    await expect(page.getByText('参考内容')).toBeVisible();
    await expect(page.locator('textarea')).toBeVisible();
  });

  test('P0-4: upload button should trigger file chooser', async ({ page }) => {
    const fileChooserPromise = page.waitForEvent('filechooser');
    await page.getByText('参考内容').click();
    const fileChooser = await fileChooserPromise;
    expect(fileChooser).toBeTruthy();
  });

  test('P0-7: toolbar buttons should be visible', async ({ page }) => {
    await expect(page.getByText('视频生成').first()).toBeVisible();
    await expect(page.getByText('Seedance 2.0').first()).toBeVisible();
    await expect(page.getByText('全能参考').first()).toBeVisible();
    await expect(page.getByText('21:9').first()).toBeVisible();
    await expect(page.getByText('15s').first()).toBeVisible();
  });

  test('P0-8: send button disabled when no content, enabled with text', async ({ page }) => {
    const sendBtn = page.locator('[class*="sendBtn"]');
    await expect(sendBtn).toBeVisible();
    await expect(sendBtn).toHaveClass(/sendDisabled/);

    await page.locator('textarea').fill('test prompt');
    await expect(sendBtn).toHaveClass(/sendEnabled/, { timeout: 5000 });
  });
});

test.describe('Video Generation Page - P1 Acceptance', () => {
  test.beforeEach(async ({ page }) => {
    await loginViaAPI(page);
  });

  test('P1-9: generation type dropdown should open and show options', async ({ page }) => {
    await page.getByText('视频生成').first().click();
    await expect(page.getByText('图片生成')).toBeVisible();
  });

  test('P1-9: model dropdown should open and show options', async ({ page }) => {
    await page.getByText('Seedance 2.0').first().click();
    await expect(page.getByText('Seedance 2.0 Fast')).toBeVisible();
  });

  test('P1-10: aspect ratio dropdown should show 6 options', async ({ page }) => {
    await page.getByText('21:9').first().click();
    await expect(page.getByText('16:9').first()).toBeVisible();
    await expect(page.getByText('9:16')).toBeVisible();
    await expect(page.getByText('1:1')).toBeVisible();
    await expect(page.getByText('4:3')).toBeVisible();
    await expect(page.getByText('3:4')).toBeVisible();
  });

  test('P1-11: duration dropdown should show 3 options', async ({ page }) => {
    await page.getByText('15s').first().click();
    await expect(page.getByText('5s', { exact: true })).toBeVisible();
    await expect(page.getByText('10s', { exact: true })).toBeVisible();
  });

  test('P1-12: switching to keyframe mode should update UI', async ({ page }) => {
    await page.getByText('全能参考').first().click();
    await page.getByText('首尾帧').first().click();

    await expect(page.getByText('自动匹配')).toBeVisible();
    await expect(page.getByText('首帧').first()).toBeVisible();
    await expect(page.getByText('尾帧').first()).toBeVisible();
    await expect(page.getByText('5s').first()).toBeVisible();
    await expect(page.getByText('@')).not.toBeVisible();
  });
});

test.describe('Video Generation Page - P2 Acceptance', () => {
  test.beforeEach(async ({ page }) => {
    await loginViaAPI(page);
  });

  test('P2-15: Ctrl+Enter should trigger send', async ({ page }) => {
    await page.locator('textarea').fill('test prompt');
    await page.keyboard.press('Control+Enter');
    await expect(page.getByText('在下方输入提示词，开始创作 AI 视频')).not.toBeVisible({ timeout: 5000 });
  });

  test('P2-16: textarea should be auto-focused on load', async ({ page }) => {
    const textarea = page.locator('textarea');
    await expect(textarea).toBeFocused();
  });
});

test.describe('Sidebar', () => {
  test('should show navigation items', async ({ page }) => {
    await loginViaAPI(page);
    await expect(page.getByText('灵感', { exact: true })).toBeVisible();
    await expect(page.getByText('生成', { exact: true })).toBeVisible();
    await expect(page.getByText('资产', { exact: true })).toBeVisible();
    await expect(page.getByText('画布', { exact: true })).toBeVisible();
  });
});