import { test, expect, type Locator, type Page } from '@playwright/test';
import { TEST_USERS } from './setup/test-users.js';

const LOGIN_URL = '/trips/login';
const PROFILE_URL = '/trips/profile';

function formatDate(offsetDays: number): string {
	const date = new Date();
	date.setDate(date.getDate() + offsetDays);
	return date.toISOString().slice(0, 10);
}

async function loginAsLocalUser(page: Page, username: string, password: string): Promise<void> {
	await page.goto(LOGIN_URL);
	await page.fill('input[name="identifier"]', username);
	await page.fill('input[name="password"]', password);
	await page.click('button[type="submit"]:has-text("Sign in locally")');
	await page.waitForURL('**/trips/dashboard', { timeout: 15_000 });
}

async function ensureSelfProfile(page: Page): Promise<void> {
	await page.goto(PROFILE_URL);
	await page.fill('#first_name', 'E2E');
	await page.fill('#last_name', 'User');
	await page.fill('#email', TEST_USERS.regular.email);
	await page.getByRole('button', { name: 'Save profile' }).click();
	await expect(page.getByRole('heading', { name: 'My Profile' })).toBeVisible();
}

async function openAddToTripMenuItem(page: Page, label: string): Promise<void> {
	await page.getByRole('button', { name: 'Add to trip' }).click();
	await page.getByRole('button', { name: label, exact: true }).click();
}

async function addLoggedInTraveller(page: Page): Promise<void> {
	await page.getByRole('button', { name: "Who's travelling?" }).click();
	const dialog = page.getByRole('dialog', { name: 'Add traveller' });
	await expect(dialog).toBeVisible();

	const selfButton = dialog.getByRole('button', { name: /You/ }).first();
	if (await selfButton.isVisible().catch(() => false)) {
		await selfButton.click();
	} else {
		const firstNameInput = dialog.getByLabel('First name *');
		if (!(await firstNameInput.isVisible().catch(() => false))) {
			await dialog.getByRole('button', { name: 'Add someone new' }).click();
		}
		await dialog.getByLabel('First name *').fill('E2E');
		await dialog.getByLabel('Last name *').fill('User');
		await dialog.getByLabel(/Email/).fill(TEST_USERS.regular.email);
		await dialog.getByRole('button', { name: 'Add traveller' }).click();
	}

	await expect(dialog).toBeHidden();
}

async function addNewTraveller(
	page: Page,
	firstName: string,
	lastName: string,
	email: string
): Promise<void> {
	await openAddToTripMenuItem(page, 'Travellers');
	const dialog = page.getByRole('dialog', { name: 'Add traveller' });
	await expect(dialog).toBeVisible();

	const firstNameInput = dialog.getByLabel('First name *');
	if (!(await firstNameInput.isVisible().catch(() => false))) {
		await dialog.getByRole('button', { name: 'Add someone new' }).click();
	}

	await dialog.getByLabel('First name *').fill(firstName);
	await dialog.getByLabel('Last name *').fill(lastName);
	await dialog.getByLabel(/Email/).fill(email);
	await dialog.getByRole('button', { name: 'Add traveller' }).click();
	await expect(dialog).toBeHidden();
}

async function addDestination(page: Page, cityQuery: string, startDate: string): Promise<void> {
	await openAddToTripMenuItem(page, 'Destinations');
	const dialog = page.getByRole('dialog', { name: 'Add destination' });
	await expect(dialog).toBeVisible();

	await dialog.getByLabel('City *').fill(cityQuery);
	const cityOption = dialog.locator('ul button').filter({ hasText: cityQuery }).first();
	await expect(cityOption).toBeVisible();
	await cityOption.click();

	await dialog.getByLabel('Arrival').fill(startDate);
	await dialog.getByRole('button', { name: 'Add to trip' }).click();
	await expect(dialog).toBeHidden();
}

async function addFlight(page: Page, departureDate: string): Promise<void> {
	await openAddToTripMenuItem(page, 'Transportation');
	const transportDialog = page.getByRole('dialog', { name: 'Add transportation' });
	await expect(transportDialog).toBeVisible();

	await transportDialog.getByRole('button', { name: /Flight/ }).click();
	const form = transportDialog.locator('form');
	await expect(form.locator('input[name="segments[0][departure_date]"]')).toBeVisible();

	await form.locator('input[name="segments[0][departure_date]"]').fill(departureDate);
	await form.getByPlaceholder('Search airline or enter code').fill('UA');
	await form.locator('input[name="segments[0][flight_number]"]').fill('1001');
	await form.getByPlaceholder('Code or search').nth(0).fill('SFO');
	await form.getByPlaceholder('Code or search').nth(1).fill('LAX');
	await expect(form.getByRole('button', { name: 'Add transportation' })).toBeEnabled();
	await form.getByRole('button', { name: 'Add transportation' }).click();
	await expect(transportDialog).toBeHidden();
}

async function addLodging(page: Page, lodgingName: string): Promise<void> {
	await openAddToTripMenuItem(page, 'Lodgings');
	const dialog = page.getByRole('dialog', { name: 'Add lodging' });
	await expect(dialog).toBeVisible();

	await dialog.getByLabel('Name *').fill(lodgingName);
	await dialog.getByRole('button', { name: 'Add lodging' }).click();
	await expect(dialog).toBeHidden();
}

async function expectPlanSectionsAndDetails(
	page: Page,
	tripName: string,
	destinationQuery: string,
	flightText: RegExp,
	lodgingName: string,
	travellerLocators: Locator[]
): Promise<void> {
	await page.getByRole('link', { name: 'Upcoming Trips' }).click();
	await expect(page.getByRole('heading', { name: 'Upcoming Trips' })).toBeVisible();
	await expect(page.getByRole('link', { name: tripName })).toBeVisible();

	await page.getByRole('link', { name: tripName }).click();
	await expect(page.getByRole('heading', { name: tripName })).toBeVisible();
	await expect(page.getByRole('heading', { name: 'Destinations' })).toBeVisible();
	await expect(page.getByRole('heading', { name: 'Transportation' })).toBeVisible();
	await expect(page.getByRole('heading', { name: 'Lodgings' })).toBeVisible();

	await expect(page.getByText(destinationQuery, { exact: false })).toBeVisible();
	await expect(page.getByText(flightText)).toBeVisible();
	await expect(page.getByText(lodgingName, { exact: true })).toBeVisible();
	for (const traveller of travellerLocators) {
		await expect(traveller).toBeVisible();
	}
}

test.beforeEach(async ({ context }) => {
	await context.clearCookies();
});

test('regular user can plan a detailed future trip with no end date', async ({ page }) => {
	const startDate = formatDate(30);
	const tripName = `E2E Future Trip ${Date.now()}`;
	const tripDescription = 'Future trip created in Playwright e2e scenario';
	const destinationQuery = 'Tokyo';
	const lodgingName = `E2E Hotel ${Date.now()}`;
	const newTravellerFirstName = 'Jamie';
	const newTravellerLastName = 'Companion';
	const newTravellerEmail = `jamie+${Date.now()}@test.local`;

	await loginAsLocalUser(page, TEST_USERS.regular.username, TEST_USERS.regular.password);
	await ensureSelfProfile(page);

	await page.getByRole('link', { name: 'Plan New Trip' }).click();
	await expect(page.getByRole('heading', { name: 'Plan New Trip' })).toBeVisible();
	await page.getByLabel('Trip name *').fill(tripName);
	await page.getByLabel('Start date').fill(startDate);
	await page.getByLabel('End date').fill('');
	await page.getByLabel('Description').fill(tripDescription);
	await page.getByRole('button', { name: 'Save' }).click();
	await page.waitForURL('**/trips/trips/*', { timeout: 15_000 });
	await expect(page.getByRole('heading', { name: tripName })).toBeVisible();

	await addLoggedInTraveller(page);
	await addNewTraveller(page, newTravellerFirstName, newTravellerLastName, newTravellerEmail);
	await addDestination(page, destinationQuery, startDate);
	await addFlight(page, startDate);
	await addLodging(page, lodgingName);

	await expectPlanSectionsAndDetails(page, tripName, destinationQuery, /UA\s*1001/, lodgingName, [
		page.getByText('E2E User', { exact: false }),
		page.getByText(`${newTravellerFirstName} ${newTravellerLastName}`, { exact: false })
	]);
});