/**
 * Phase-1 acceptance tests: URL-based navigation, responsive layout, and core user flows.
 * Rewrites the previous click-nav suite for react-router v6 URL navigation.
 *
 * Auth strategy: seed localStorage['cbpoa_token'] via addInitScript (App.tsx gates on
 * token presence only; no server validation). Backend is mocked via page.route so the
 * suite runs hermetically without a live :8000 backend.
 */
import { test, expect, Page } from '@playwright/test';
import { TESTIDS } from '../src/utils/testids';

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

/** Seed auth token and mock all /api/** calls before each page load. */
async function seedAuthAndMockApi(page: Page) {
  // Prevent login gate from appearing.
  await page.addInitScript(() => {
    localStorage.setItem('cbpoa_token', 'e2e-test-token');
  });

  // Mock backend responses so the suite is hermetic — no live :8000 required.
  // Each response must match the TypeScript interface shape; returning {} causes
  // pages to throw when accessing expected array properties.
  await page.route('/api/**', (route) => {
    const url = route.request().url();

    if (url.includes('/alerts')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({ alerts: [], total: 0 }),
      });
      return;
    }

    if (url.includes('/history/aggregated')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({ aggregations: [], total_records: 0 }),
      });
      return;
    }

    if (url.includes('/grids')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({ type: 'FeatureCollection', features: [] }),
      });
      return;
    }

    // DemographicsResponse — used by DemographicAnalysis page.
    if (url.includes('/cases/demographics')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({
          age_distribution: [],
          gender_split: { male: { outpatient: 0, inpatient: 0 }, female: { outpatient: 0, inpatient: 0 } },
          age_diagnosis_matrix: [],
        }),
      });
      return;
    }

    // DiseaseAnalysis calls: diagnosis-distribution, seasonality, districts.
    if (url.includes('/cases/diagnosis-distribution') || url.includes('/cases/disease-seasonality')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify([]),
      });
      return;
    }

    if (url.includes('/cases/districts') || url.includes('/districts')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify([]),
      });
      return;
    }

    // Trend / time-series endpoints.
    if (url.includes('/cases/trend') || url.includes('/cases')) {
      route.fulfill({
        status: 200,
        contentType: 'application/json',
        body: JSON.stringify({ data: [], total: 0 }),
      });
      return;
    }

    // Default fallback — return a safe empty object.
    route.fulfill({
      status: 200,
      contentType: 'application/json',
      body: JSON.stringify({ data: [], items: [], total: 0 }),
    });
  });
}

// ---------------------------------------------------------------------------
// URL-based navigation (react-router v6)
// ---------------------------------------------------------------------------

test.describe('URL-based navigation', () => {
  test.beforeEach(async ({ page }) => {
    await seedAuthAndMockApi(page);
  });

  test('deep-link: /analysis/disease mounts page-disease directly', async ({ page }) => {
    await page.goto('/analysis/disease');
    await expect(page.locator(`[data-testid="${TESTIDS.pageDisease}"]`)).toBeVisible();
  });

  test('refresh preserves page: reload on /analysis/disease keeps URL and mounts page-disease', async ({
    page,
  }) => {
    await page.goto('/analysis/disease');
    await expect(page.locator(`[data-testid="${TESTIDS.pageDisease}"]`)).toBeVisible();

    await page.reload();

    await expect(page).toHaveURL(/\/analysis\/disease/);
    await expect(page.locator(`[data-testid="${TESTIDS.pageDisease}"]`)).toBeVisible();
  });

  test('browser back: from /analysis/trend back to /monitoring restores page-monitoring', async ({
    page,
  }) => {
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();

    await page.goto('/analysis/trend');
    await expect(page.locator(`[data-testid="${TESTIDS.pageTrend}"]`)).toBeVisible();

    await page.goBack();

    await expect(page).toHaveURL(/\/monitoring/);
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();
  });

  test('NavLink click updates URL to /alerts and mounts page-alerts', async ({ page }) => {
    // Start on /monitoring. The SideNav collapses all modules except the active one,
    // so nav-alerts (inside the "预警" module) is hidden behind a collapsed section.
    // We must expand the "预警" module first by clicking its header button.
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();

    // Expand the "预警" module section so nav-alerts NavLink becomes visible.
    // Both sidebar-rail and app-drawer render a SideNav; scope to sidebar-rail to avoid
    // strict-mode ambiguity (the app-drawer's copy is also in the DOM but off-screen).
    await page
      .locator(`[data-testid="${TESTIDS.sidebarRail}"] button`)
      .filter({ hasText: '预警' })
      .click();
    await expect(
      page.locator(`[data-testid="${TESTIDS.sidebarRail}"] [data-testid="${TESTIDS.navAlerts}"]`)
    ).toBeVisible();

    await page
      .locator(`[data-testid="${TESTIDS.sidebarRail}"] [data-testid="${TESTIDS.navAlerts}"]`)
      .click();

    await expect(page).toHaveURL(/\/alerts/);
    await expect(page.locator(`[data-testid="${TESTIDS.pageAlerts}"]`)).toBeVisible();
  });

  test('root / redirects to /monitoring', async ({ page }) => {
    await page.goto('/');
    await expect(page).toHaveURL(/\/monitoring/);
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();
  });

  test('unknown path redirects to /monitoring', async ({ page }) => {
    await page.goto('/does-not-exist');
    await expect(page).toHaveURL(/\/monitoring/);
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();
  });
});

// ---------------------------------------------------------------------------
// Responsive layout
// ---------------------------------------------------------------------------

test.describe('Responsive layout — mobile @375px', () => {
  test.use({ viewport: { width: 375, height: 812 } });

  test.beforeEach(async ({ page }) => {
    await seedAuthAndMockApi(page);
  });

  test('hamburger is visible and sidebar-rail is hidden at 375px', async ({ page }) => {
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();

    await expect(page.locator(`[data-testid="${TESTIDS.hamburger}"]`)).toBeVisible();
    await expect(page.locator(`[data-testid="${TESTIDS.sidebarRail}"]`)).not.toBeVisible();
  });

  test('tapping hamburger slides app-drawer into viewport', async ({ page }) => {
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();

    // Drawer should be off-screen (translate-x-full) before toggle.
    const drawer = page.locator(`[data-testid="${TESTIDS.appDrawer}"]`);
    await expect(drawer).not.toBeInViewport();

    await page.locator(`[data-testid="${TESTIDS.hamburger}"]`).click();

    // After toggle, drawer slides in and becomes visible in viewport.
    await expect(drawer).toBeInViewport();
  });

  test('no horizontal scroll on default route at 375px', async ({ page }) => {
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();

    const noHorizontalScroll = await page.evaluate(
      () => document.documentElement.scrollWidth <= document.documentElement.clientWidth
    );
    expect(noHorizontalScroll).toBe(true);
  });
});

test.describe('Responsive layout — desktop @1280px', () => {
  test.use({ viewport: { width: 1280, height: 800 } });

  test.beforeEach(async ({ page }) => {
    await seedAuthAndMockApi(page);
  });

  test('sidebar-rail is visible and hamburger is hidden at 1280px', async ({ page }) => {
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();

    await expect(page.locator(`[data-testid="${TESTIDS.sidebarRail}"]`)).toBeVisible();
    await expect(page.locator(`[data-testid="${TESTIDS.hamburger}"]`)).not.toBeVisible();
  });
});

// ---------------------------------------------------------------------------
// Core page loading
// ---------------------------------------------------------------------------

test.describe('Core pages load via URL nav', () => {
  test.beforeEach(async ({ page }) => {
    await seedAuthAndMockApi(page);
  });

  test('/monitoring loads page-monitoring', async ({ page }) => {
    await page.goto('/monitoring');
    await expect(page.locator(`[data-testid="${TESTIDS.pageMonitoring}"]`)).toBeVisible();
  });

  test('/alerts loads page-alerts', async ({ page }) => {
    await page.goto('/alerts');
    await expect(page.locator(`[data-testid="${TESTIDS.pageAlerts}"]`)).toBeVisible();
  });

  test('/analysis/trend loads page-trend', async ({ page }) => {
    await page.goto('/analysis/trend');
    await expect(page.locator(`[data-testid="${TESTIDS.pageTrend}"]`)).toBeVisible();
  });

  test('/analysis/district loads page-district', async ({ page }) => {
    await page.goto('/analysis/district');
    await expect(page.locator(`[data-testid="${TESTIDS.pageDistrict}"]`)).toBeVisible();
  });

  test('/analysis/reports loads page-reports', async ({ page }) => {
    await page.goto('/analysis/reports');
    await expect(page.locator(`[data-testid="${TESTIDS.pageReports}"]`)).toBeVisible();
  });

  test('/analysis/demographics loads page-demographics', async ({ page }) => {
    await page.goto('/analysis/demographics');
    await expect(page.locator(`[data-testid="${TESTIDS.pageDemographics}"]`)).toBeVisible();
  });

  test('/analysis/environment loads page-environment', async ({ page }) => {
    await page.goto('/analysis/environment');
    await expect(page.locator(`[data-testid="${TESTIDS.pageEnvironment}"]`)).toBeVisible();
  });
});