// ABOUTME: E2E tests for calendar functionality including ICS feed and calendar view.
// ABOUTME: Tests calendar display, navigation, and ICS subscription features.

import { test as baseTest } from "@playwright/test";
import { expect, test } from "./fixtures";

baseTest.describe("calendar", () => {
  baseTest.describe("unauthenticated", () => {
    baseTest(
      "calendar page redirects to login when not authenticated",
      async ({ page }) => {
        await page.goto("/calendar");

        // Should redirect to /login
        await expect(page).toHaveURL(/\/login/);
      },
    );
  });

  baseTest.describe("ICS endpoint", () => {
    baseTest(
      "ICS endpoint returns error for invalid user",
      async ({ page }) => {
        const response = await page.request.get(
          "/api/calendar/invalid-user-id/invalid-token.ics",
        );

        // Should return 404 (user not found) or 500 (PocketBase not connected in test env)
        expect([404, 500]).toContain(response.status());
      },
    );

    baseTest(
      "ICS endpoint returns error for invalid token",
      async ({ page }) => {
        // Need a valid user ID but invalid token - this would require setup
        // For now, just verify the endpoint exists and returns appropriate error
        const response = await page.request.get(
          "/api/calendar/test/invalid.ics",
        );

        // Should return 404 (user not found), 401 (invalid token), or 500 (PocketBase not connected)
        expect([401, 404, 500]).toContain(response.status());
      },
    );
  });

  baseTest.describe("calendar regenerate token API", () => {
    baseTest("regenerate token requires authentication", async ({ page }) => {
      const response = await page.request.post(
        "/api/calendar/regenerate-token",
      );

      // Should return 401 Unauthorized
      expect(response.status()).toBe(401);
    });
  });
});

test.describe("calendar authenticated", () => {
  test("displays calendar page with heading", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Check for the main calendar heading (h1)
    const heading = establishedPage.getByRole("heading", {
      name: "Calendar",
      exact: true,
    });
    await expect(heading).toBeVisible();
  });

  test("shows month view calendar", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Look for calendar grid structure
    const calendarGrid = establishedPage
      .getByRole("grid")
      .or(establishedPage.locator('[data-testid="month-view"]'));
    await expect(calendarGrid).toBeVisible();
  });

  test("shows month and year display", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Calendar should show current month/year
    const monthYear = establishedPage.getByText(
      /january|february|march|april|may|june|july|august|september|october|november|december/i,
    );
    await expect(monthYear.first()).toBeVisible();
  });

  test("has navigation controls for months", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Look for previous/next month buttons
    const prevButton = establishedPage.getByRole("button", {
      name: /prev|previous|←|back/i,
    });
    const nextButton = establishedPage.getByRole("button", {
      name: /next|→|forward/i,
    });

    // At least one navigation control should be visible
    const hasPrev = await prevButton.isVisible().catch(() => false);
    const hasNext = await nextButton.isVisible().catch(() => false);

    expect(hasPrev || hasNext).toBe(true);
  });

  test("can navigate to previous month", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    const prevButton = establishedPage.getByRole("button", {
      name: /prev|previous|←/i,
    });
    const hasPrev = await prevButton.isVisible().catch(() => false);

    if (hasPrev) {
      // Click previous month button
      await prevButton.click();

      // Wait for update - verify page doesn't error
      await establishedPage.waitForTimeout(500);

      // Verify calendar is still rendered
      const monthYear = establishedPage.getByText(
        /january|february|march|april|may|june|july|august|september|october|november|december/i,
      );
      await expect(monthYear.first()).toBeVisible();
    }
  });

  test("can navigate to next month", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    const nextButton = establishedPage.getByRole("button", { name: /next|→/i });
    const hasNext = await nextButton.isVisible().catch(() => false);

    if (hasNext) {
      // Click next
      await nextButton.click();

      // Wait for update
      await establishedPage.waitForTimeout(500);
    }
  });

  test("shows ICS subscription section", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Look for calendar subscription / ICS section
    const subscriptionText = establishedPage.getByText(
      /subscribe|subscription|calendar.*url|ics/i,
    );
    const hasSubscription = await subscriptionText
      .first()
      .isVisible()
      .catch(() => false);

    // This may not be visible if user hasn't generated a token
    if (hasSubscription) {
      await expect(subscriptionText.first()).toBeVisible();
    }
  });

  test("shows back navigation", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    const backLink = establishedPage.getByRole("link", {
      name: /back|home|dashboard/i,
    });
    await expect(backLink).toBeVisible();
  });

  test("can navigate back to dashboard", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    const backLink = establishedPage.getByRole("link", {
      name: /back|home|dashboard/i,
    });
    await backLink.click();

    await expect(establishedPage).toHaveURL("/");
  });
});

test.describe("calendar display features", () => {
  test("today is highlighted in calendar view", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Today's date should be highlighted with distinct styling
    const today = new Date();
    const dayNumber = today.getDate().toString();

    // Look for today button/cell with special styling
    const todayCell = establishedPage
      .locator('[data-today="true"]')
      .or(establishedPage.locator('[aria-current="date"]'))
      .or(
        establishedPage.getByRole("button", {
          name: new RegExp(`${dayNumber}`),
        }),
      );

    const hasTodayHighlight = await todayCell
      .first()
      .isVisible()
      .catch(() => false);

    if (hasTodayHighlight) {
      await expect(todayCell.first()).toBeVisible();
    }
  });

  test("phase colors are visible in calendar days", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Calendar days should have phase coloring (background color classes)
    const dayButtons = establishedPage.getByRole("button").filter({
      has: establishedPage.locator('[class*="bg-"]'),
    });

    const hasColoredDays = await dayButtons
      .first()
      .isVisible()
      .catch(() => false);

    // If there's cycle data, some days should have color
    if (hasColoredDays) {
      await expect(dayButtons.first()).toBeVisible();
    }
  });

  test("calendar shows phase legend", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Look for phase legend with phase names
    const legendText = establishedPage.getByText(
      /menstrual|follicular|ovulation|luteal/i,
    );
    const hasLegend = await legendText
      .first()
      .isVisible()
      .catch(() => false);

    if (hasLegend) {
      await expect(legendText.first()).toBeVisible();
    }
  });

  test("calendar has Today button for quick navigation", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    const todayButton = establishedPage.getByRole("button", { name: /today/i });
    const hasTodayButton = await todayButton.isVisible().catch(() => false);

    if (hasTodayButton) {
      await expect(todayButton).toBeVisible();
    }
  });

  test("can navigate multiple months and return to today", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Navigate forward a few months
    const nextButton = establishedPage.getByRole("button", { name: /next|→/i });
    const hasNext = await nextButton.isVisible().catch(() => false);

    if (hasNext) {
      await nextButton.click();
      await establishedPage.waitForTimeout(300);
      await nextButton.click();
      await establishedPage.waitForTimeout(300);

      // Look for Today button to return
      const todayButton = establishedPage.getByRole("button", {
        name: /today/i,
      });
      const hasTodayButton = await todayButton.isVisible().catch(() => false);

      if (hasTodayButton) {
        await todayButton.click();
        await establishedPage.waitForTimeout(300);

        // Should be back to current month
        const currentMonth = new Date().toLocaleString("default", {
          month: "long",
        });
        const monthText = establishedPage.getByText(
          new RegExp(currentMonth, "i"),
        );
        const isCurrentMonth = await monthText
          .first()
          .isVisible()
          .catch(() => false);
        expect(isCurrentMonth).toBe(true);
      }
    }
  });
});

test.describe("ICS feed - generate token flow", () => {
  test("can generate calendar URL", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Established user has no token - should see generate button
    const generateButton = establishedPage.getByRole("button", {
      name: /generate/i,
    });
    await expect(generateButton).toBeVisible();

    await generateButton.click();
    await establishedPage.waitForTimeout(1000);

    // After generating, URL should be displayed
    const urlDisplay = establishedPage.getByText(/\.ics|calendar.*url/i);
    await expect(urlDisplay.first()).toBeVisible();
  });

  test("shows generate or regenerate token button", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Look for generate/regenerate button
    const tokenButton = establishedPage.getByRole("button", {
      name: /generate|regenerate/i,
    });
    await expect(tokenButton).toBeVisible();
  });
});

test.describe("ICS feed - with token", () => {
  // Helper to ensure URL is generated
  async function ensureCalendarUrlGenerated(
    page: import("@playwright/test").Page,
  ): Promise<void> {
    const urlInput = page.getByRole("textbox");
    const hasUrl = await urlInput.isVisible().catch(() => false);

    if (!hasUrl) {
      // Generate the URL if not present
      const generateButton = page.getByRole("button", { name: /generate/i });
      if (await generateButton.isVisible().catch(() => false)) {
        await generateButton.click();
        await page.waitForTimeout(1000);
      }
    }
  }

  test("calendar URL is displayed after generation", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(establishedPage);

    // URL should now be visible
    const urlInput = establishedPage.getByRole("textbox");
    await expect(urlInput).toBeVisible();
  });

  test("calendar URL contains user ID and token", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(establishedPage);

    const urlInput = establishedPage.getByRole("textbox");
    await expect(urlInput).toBeVisible();

    const url = await urlInput.inputValue();
    // URL should contain /api/calendar/ and end with .ics
    expect(url).toContain("/api/calendar/");
    expect(url).toContain(".ics");
  });

  test("shows copy button when URL exists", async ({ establishedPage }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(establishedPage);

    // Copy button should be visible after generating token
    const copyButton = establishedPage.getByRole("button", { name: /copy/i });
    await expect(copyButton).toBeVisible();
  });

  test("copy button copies URL to clipboard", async ({
    establishedPage,
    context,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(establishedPage);

    // Grant clipboard permissions
    await context.grantPermissions(["clipboard-read", "clipboard-write"]);

    const copyButton = establishedPage.getByRole("button", { name: /copy/i });
    await expect(copyButton).toBeVisible();

    await copyButton.click();

    // Verify clipboard has content (clipboard read may not work in all env)
    const clipboardContent = await establishedPage
      .evaluate(() => navigator.clipboard.readText())
      .catch(() => null);

    if (clipboardContent) {
      expect(clipboardContent).toContain(".ics");
    }
  });

  test("shows regenerate button after generating token", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(establishedPage);

    // User with token should see regenerate option
    const regenerateButton = establishedPage.getByRole("button", {
      name: /regenerate/i,
    });
    await expect(regenerateButton).toBeVisible();
  });
});

test.describe("ICS feed content validation", () => {
  // Helper to ensure URL is generated
  async function ensureCalendarUrlGenerated(
    page: import("@playwright/test").Page,
  ): Promise<void> {
    const urlInput = page.getByRole("textbox");
    const hasUrl = await urlInput.isVisible().catch(() => false);

    if (!hasUrl) {
      const generateButton = page.getByRole("button", { name: /generate/i });
      if (await generateButton.isVisible().catch(() => false)) {
        await generateButton.click();
        await page.waitForTimeout(1000);
      }
    }
  }

  async function getIcsContent(
    page: import("@playwright/test").Page,
  ): Promise<string | null> {
    const urlInput = page.getByRole("textbox");
    const hasUrlInput = await urlInput.isVisible().catch(() => false);

    if (!hasUrlInput) {
      return null;
    }

    const url = await urlInput.inputValue();
    const response = await page.request.get(url);
    if (response.ok()) {
      return await response.text();
    }

    return null;
  }

  test("ICS feed contains valid VCALENDAR structure", async ({
    calendarPage,
  }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const icsContent = await getIcsContent(calendarPage);
    expect(icsContent).not.toBeNull();

    // Verify basic ICS structure
    expect(icsContent).toContain("BEGIN:VCALENDAR");
    expect(icsContent).toContain("END:VCALENDAR");
    expect(icsContent).toContain("VERSION:2.0");
    expect(icsContent).toContain("PRODID:");
  });

  test("ICS feed contains VEVENT entries", async ({ calendarPage }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const icsContent = await getIcsContent(calendarPage);
    expect(icsContent).not.toBeNull();

    // Should have at least some events
    expect(icsContent).toContain("BEGIN:VEVENT");
    expect(icsContent).toContain("END:VEVENT");
  });

  test("ICS feed contains phase events with emojis", async ({
    calendarPage,
  }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const icsContent = await getIcsContent(calendarPage);
    expect(icsContent).not.toBeNull();

    // Per calendar.md spec, events should have emojis:
    // 🩸 Menstrual, 🌱 Follicular, 🌸 Ovulation, 🌙 Early Luteal, 🌑 Late Luteal
    const phaseEmojis = ["🩸", "🌱", "🌸", "🌙", "🌑"];
    const hasEmojis = phaseEmojis.some((emoji) => icsContent?.includes(emoji));
    expect(hasEmojis).toBe(true);
  });

  test("ICS feed has CATEGORIES for calendar color coding", async ({
    calendarPage,
  }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const icsContent = await getIcsContent(calendarPage);
    expect(icsContent).not.toBeNull();

    // Per calendar.md spec, phases have color categories:
    // Red, Green, Pink, Yellow, Orange
    const colorCategories = ["Red", "Green", "Pink", "Yellow", "Orange"];
    const hasCategories = colorCategories.some((color) =>
      icsContent?.includes(`CATEGORIES:${color}`),
    );

    // If user has cycle data, categories should be present
    if (
      icsContent?.includes("MENSTRUAL") ||
      icsContent?.includes("FOLLICULAR")
    ) {
      expect(hasCategories).toBe(true);
    }
  });

  test("ICS feed spans approximately 90 days", async ({ calendarPage }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const icsContent = await getIcsContent(calendarPage);
    expect(icsContent).not.toBeNull();

    // Count DTSTART entries to estimate event span
    const dtStartMatches = icsContent?.match(/DTSTART/g);

    // Should have multiple events (phases + warnings)
    // 3 months of phases (~15 phase events) + warning events
    if (dtStartMatches) {
      expect(dtStartMatches.length).toBeGreaterThan(5);
    }
  });

  test("ICS feed includes warning events", async ({ calendarPage }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const icsContent = await getIcsContent(calendarPage);
    expect(icsContent).not.toBeNull();

    // Per ics.ts, warning events include these phrases
    const warningIndicators = [
      "Late Luteal Phase",
      "CRITICAL PHASE",
      "⚠️",
      "🔴",
    ];
    const hasWarnings = warningIndicators.some((indicator) =>
      icsContent?.includes(indicator),
    );

    // Warnings should be present if feed has events
    if (icsContent?.includes("BEGIN:VEVENT")) {
      expect(hasWarnings).toBe(true);
    }
  });

  test("ICS content type is text/calendar", async ({ calendarPage }) => {
    await calendarPage.goto("/calendar");
    await calendarPage.waitForLoadState("networkidle");

    await ensureCalendarUrlGenerated(calendarPage);

    const urlInput = calendarPage.getByRole("textbox");
    await expect(urlInput).toBeVisible();

    const url = await urlInput.inputValue();
    const response = await calendarPage.request.get(url);

    expect(response.ok()).toBe(true);
    const contentType = response.headers()["content-type"];
    expect(contentType).toContain("text/calendar");
  });
});

test.describe("calendar accessibility", () => {
  test("calendar grid has proper ARIA role and label", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Calendar should have role="grid" per WAI-ARIA calendar pattern
    const calendarGrid = establishedPage.getByRole("grid", {
      name: /calendar/i,
    });
    await expect(calendarGrid).toBeVisible();
  });

  test("day cells have descriptive aria-labels", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Day buttons should have descriptive aria-labels including date and phase info
    const dayButtons = establishedPage.locator("button[data-day]");
    const hasDayButtons = await dayButtons
      .first()
      .isVisible()
      .catch(() => false);

    if (!hasDayButtons) {
      // No day buttons with data-day attribute - test different selector
      return;
    }

    // Get the first visible day button's aria-label
    const firstDayButton = dayButtons.first();
    const ariaLabel = await firstDayButton.getAttribute("aria-label");

    // Aria-label should contain date information (month and year)
    expect(ariaLabel).toMatch(
      /january|february|march|april|may|june|july|august|september|october|november|december/i,
    );
    expect(ariaLabel).toMatch(/\d{4}/); // Should contain year
  });

  test("keyboard navigation with arrow keys works", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Focus on a day button in the calendar grid
    const dayButtons = establishedPage.locator("button[data-day]");
    const hasDayButtons = await dayButtons
      .first()
      .isVisible()
      .catch(() => false);

    if (!hasDayButtons) {
      return;
    }

    // Click a day button to focus it
    const calendarGrid = establishedPage.getByRole("grid", {
      name: /calendar/i,
    });
    const hasGrid = await calendarGrid.isVisible().catch(() => false);

    if (!hasGrid) {
      return;
    }

    // Focus the grid and press Tab to focus first day
    await calendarGrid.focus();
    await establishedPage.keyboard.press("Tab");

    // Get currently focused element
    const focusedBefore = await establishedPage.evaluate(() => {
      const el = document.activeElement;
      return el ? el.getAttribute("data-day") : null;
    });

    // Press ArrowRight to move to next day
    await establishedPage.keyboard.press("ArrowRight");

    // Get new focused element
    const focusedAfter = await establishedPage.evaluate(() => {
      const el = document.activeElement;
      return el ? el.getAttribute("data-day") : null;
    });

    // If both values exist, verify navigation occurred
    if (focusedBefore && focusedAfter) {
      expect(focusedAfter).not.toBe(focusedBefore);
    }
  });

  test("navigation buttons have accessible labels", async ({
    establishedPage,
  }) => {
    await establishedPage.goto("/calendar");
    await establishedPage.waitForLoadState("networkidle");

    // Previous and next month buttons should have aria-labels
    const prevButton = establishedPage.getByRole("button", {
      name: /previous month/i,
    });
    const nextButton = establishedPage.getByRole("button", {
      name: /next month/i,
    });

    const hasPrev = await prevButton.isVisible().catch(() => false);
    const hasNext = await nextButton.isVisible().catch(() => false);

    // At least one navigation button should be accessible
    expect(hasPrev || hasNext).toBe(true);

    if (hasPrev) {
      await expect(prevButton).toBeVisible();
    }
    if (hasNext) {
      await expect(nextButton).toBeVisible();
    }
  });
});