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

/**
 * Appointments Page E2E Tests
 * 
 * Tests for viewing and cancelling user appointments.
 */

const API_URL = process.env.NEXT_PUBLIC_API_URL || "http://localhost:8000";

function getRequiredEnv(name: string): string {
  const value = process.env[name];
  if (!value) {
    throw new Error(`Required environment variable ${name} is not set.`);
  }
  return value;
}

const REGULAR_USER = {
  email: getRequiredEnv("DEV_USER_EMAIL"),
  password: getRequiredEnv("DEV_USER_PASSWORD"),
};

const ADMIN_USER = {
  email: getRequiredEnv("DEV_ADMIN_EMAIL"),
  password: getRequiredEnv("DEV_ADMIN_PASSWORD"),
};

async function clearAuth(page: Page) {
  await page.context().clearCookies();
}

async function loginUser(page: Page, email: string, password: string) {
  await page.goto("/login");
  await page.fill('input[type="email"]', email);
  await page.fill('input[type="password"]', password);
  await page.click('button[type="submit"]');
  await page.waitForURL((url) => !url.pathname.includes("/login"), { timeout: 10000 });
}

// Helper to format date as YYYY-MM-DD in local timezone
function formatDateLocal(d: Date): string {
  const year = d.getFullYear();
  const month = String(d.getMonth() + 1).padStart(2, "0");
  const day = String(d.getDate()).padStart(2, "0");
  return `${year}-${month}-${day}`;
}

function getTomorrowDateStr(): string {
  const tomorrow = new Date();
  tomorrow.setDate(tomorrow.getDate() + 1);
  return formatDateLocal(tomorrow);
}

// Set up availability and create a booking
async function createTestBooking(page: Page) {
  const dateStr = getTomorrowDateStr();
  
  // First login as admin to set availability
  await clearAuth(page);
  await loginUser(page, ADMIN_USER.email, ADMIN_USER.password);
  
  const adminCookies = await page.context().cookies();
  const adminAuthCookie = adminCookies.find(c => c.name === "auth_token");
  
  if (!adminAuthCookie) throw new Error("No admin auth cookie");
  
  await page.request.put(`${API_URL}/api/admin/availability`, {
    headers: {
      Cookie: `auth_token=${adminAuthCookie.value}`,
      "Content-Type": "application/json",
    },
    data: {
      date: dateStr,
      slots: [{ start_time: "09:00:00", end_time: "12:00:00" }],
    },
  });
  
  // Login as regular user
  await clearAuth(page);
  await loginUser(page, REGULAR_USER.email, REGULAR_USER.password);
  
  const userCookies = await page.context().cookies();
  const userAuthCookie = userCookies.find(c => c.name === "auth_token");
  
  if (!userAuthCookie) throw new Error("No user auth cookie");
  
  // Create booking - use a random minute to avoid conflicts with parallel tests
  const randomMinute = Math.floor(Math.random() * 11) * 15; // 0, 15, 30, 45 etc up to 165 min
  const hour = 9 + Math.floor(randomMinute / 60);
  const minute = randomMinute % 60;
  const timeStr = `${String(hour).padStart(2, '0')}:${String(minute).padStart(2, '0')}:00`;
  
  const response = await page.request.post(`${API_URL}/api/booking`, {
    headers: {
      Cookie: `auth_token=${userAuthCookie.value}`,
      "Content-Type": "application/json",
    },
    data: {
      slot_start: `${dateStr}T${timeStr}Z`,
      note: "Test appointment",
    },
  });
  
  return response.json();
}

test.describe("Appointments Page - Regular User Access", () => {
  test.beforeEach(async ({ page }) => {
    await clearAuth(page);
    await loginUser(page, REGULAR_USER.email, REGULAR_USER.password);
  });

  test("regular user can access appointments page", async ({ page }) => {
    await page.goto("/appointments");
    
    await expect(page).toHaveURL("/appointments");
    await expect(page.getByRole("heading", { name: "My Appointments" })).toBeVisible();
  });

  test("regular user sees Appointments link in navigation", async ({ page }) => {
    await page.goto("/");
    
    await expect(page.getByRole("link", { name: "Appointments" })).toBeVisible();
  });

  test("shows empty state when no appointments", async ({ page }) => {
    await page.goto("/appointments");
    
    await expect(page.getByText("don't have any appointments")).toBeVisible();
    await expect(page.getByRole("link", { name: "Book an appointment" })).toBeVisible();
  });
});

test.describe("Appointments Page - With Bookings", () => {
  test("shows user's appointments", async ({ page }) => {
    // Create a booking first
    await createTestBooking(page);
    
    // Go to appointments page
    await page.goto("/appointments");
    
    // Should see the appointment
    await expect(page.getByText("Test appointment")).toBeVisible();
    await expect(page.getByText("Booked", { exact: true })).toBeVisible();
  });

  test("can cancel an appointment", async ({ page }) => {
    // Create a booking
    await createTestBooking(page);
    
    // Go to appointments page
    await page.goto("/appointments");
    
    // Click cancel button
    await page.getByRole("button", { name: "Cancel" }).first().click();
    
    // Confirm cancellation
    await page.getByRole("button", { name: "Confirm" }).click();
    
    // Should show cancelled status
    await expect(page.getByText("Cancelled by you")).toBeVisible();
  });

  test("can abort cancellation", async ({ page }) => {
    // Create a booking
    await createTestBooking(page);
    
    // Go to appointments page
    await page.goto("/appointments");
    
    // Wait for appointments to load
    await expect(page.getByRole("heading", { name: /Upcoming/ })).toBeVisible({ timeout: 10000 });
    
    // Click cancel button
    await page.getByRole("button", { name: "Cancel" }).first().click();
    
    // Click No to abort
    await page.getByRole("button", { name: "No" }).click();
    
    // Should still show as booked
    await expect(page.getByText("Booked", { exact: true })).toBeVisible();
  });
});

test.describe("Appointments Page - Access Control", () => {
  test("admin cannot access appointments page", async ({ page }) => {
    await clearAuth(page);
    await loginUser(page, ADMIN_USER.email, ADMIN_USER.password);
    
    await page.goto("/appointments");
    
    // Should be redirected
    await expect(page).not.toHaveURL("/appointments");
  });

  test("admin does not see Appointments link", async ({ page }) => {
    await clearAuth(page);
    await loginUser(page, ADMIN_USER.email, ADMIN_USER.password);
    
    await page.goto("/audit");
    
    await expect(page.getByRole("link", { name: "Appointments" })).not.toBeVisible();
  });

  test("unauthenticated user redirected to login", async ({ page }) => {
    await clearAuth(page);
    
    await page.goto("/appointments");
    
    await expect(page).toHaveURL("/login");
  });
});

test.describe("Appointments API", () => {
  test("regular user can view appointments via API", async ({ page }) => {
    await clearAuth(page);
    await loginUser(page, REGULAR_USER.email, REGULAR_USER.password);
    
    const cookies = await page.context().cookies();
    const authCookie = cookies.find(c => c.name === "auth_token");
    
    if (authCookie) {
      const response = await page.request.get(`${API_URL}/api/appointments`, {
        headers: {
          Cookie: `auth_token=${authCookie.value}`,
        },
      });
      
      expect(response.status()).toBe(200);
      expect(Array.isArray(await response.json())).toBe(true);
    }
  });

  test("regular user can cancel appointment via API", async ({ page }) => {
    // Create a booking
    const booking = await createTestBooking(page);
    
    const cookies = await page.context().cookies();
    const authCookie = cookies.find(c => c.name === "auth_token");
    
    if (authCookie && booking && booking.id) {
      const response = await page.request.post(
        `${API_URL}/api/appointments/${booking.id}/cancel`,
        {
          headers: {
            Cookie: `auth_token=${authCookie.value}`,
            "Content-Type": "application/json",
          },
          data: {},
        }
      );
      
      expect(response.status()).toBe(200);
      const data = await response.json();
      expect(data.status).toBe("cancelled_by_user");
    }
  });

  test("admin cannot view user appointments via API", async ({ page }) => {
    await clearAuth(page);
    await loginUser(page, ADMIN_USER.email, ADMIN_USER.password);
    
    const cookies = await page.context().cookies();
    const authCookie = cookies.find(c => c.name === "auth_token");
    
    if (authCookie) {
      const response = await page.request.get(`${API_URL}/api/appointments`, {
        headers: {
          Cookie: `auth_token=${authCookie.value}`,
        },
      });
      
      expect(response.status()).toBe(403);
    }
  });
});