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

const NEW_TRIP_URL = '/trips/trips/new';

function escapeRegex(text: string): string {
	return text.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

export function uniqueSuffix(): string {
	return `${Date.now()}-${Math.floor(Math.random() * 1000)}`;
}

export async function createTrip(
	page: Page,
	values: { name: string; startDate?: string; description?: string }
): Promise<{ tripUrl: string; tripId: string }> {
	await page.goto(NEW_TRIP_URL);
	await expect(page.getByRole('heading', { name: 'Plan New Trip' })).toBeVisible();
	if (values.startDate) {
		await page.getByLabel('Start date').fill(values.startDate);
	} else {
		await page.getByRole('checkbox', { name: "I don't know yet" }).first().check();
	}
	if (values.description) {
		await page.getByLabel('Description').fill(values.description);
	}
	await page.locator('input[name="name"]').fill(values.name);
	await page.getByRole('button', { name: 'Save' }).click();
	await expect(page).toHaveURL(/\/trips\/trips\/(?!new$)[^/?#]+$/, { timeout: 15_000 });
	const tripUrl = page.url();
	const tripId = tripUrl.split('/').pop() ?? '';
	return { tripUrl, tripId };
}

export async function openAddToTripMenuItem(page: Page, label: string): Promise<void> {
	const addToTripButton = page.getByRole('button', { name: /^Add to trip$/i });
	if (await addToTripButton.isVisible().catch(() => false)) {
		await addToTripButton.click();
		await page.getByRole('button', { name: label, exact: true }).click();
		return;
	}

	// In the welcome state, button names include label + subtitle.
	await page
		.getByRole('button', { name: new RegExp(`^${escapeRegex(label)}\\b`, 'i') })
		.first()
		.click();
}

export async function openAddTraveller(page: Page): Promise<void> {
	const existingDialog = page.getByRole('dialog', { name: 'Add traveller' });
	if (await existingDialog.isVisible().catch(() => false)) return;

	const addToTripButton = page.getByRole('button', { name: /^Add to trip$/i });
	if (await addToTripButton.isVisible().catch(() => false)) {
		await addToTripButton.click();
		await page.getByRole('button', { name: 'Travellers', exact: true }).click();
		return;
	}
	await page.getByRole('button', { name: /^Who's travelling\?/ }).click();
}

export async function addTraveller(
	page: Page,
	values: { firstName: string; lastName: string; email?: string }
): Promise<void> {
	await openAddTraveller(page);
	const dialog = page.getByRole('dialog', { name: 'Add traveller' });
	await expect(dialog).toBeVisible();

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

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

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

	await dialog.getByRole('button', { name: /Flight/ }).click();
	const form = dialog.locator('form');
	await expect(form.locator('input[name="segments[0][departure_date]"]')).toBeVisible();
	await form.locator('input[name="segments[0][departure_date]"]').fill(values.departureDate);
	await form.getByPlaceholder('Search airline or enter code').fill(values.airlineCode);
	await form.locator('input[name="segments[0][flight_number]"]').fill(values.flightNumber);
	await form.getByPlaceholder('Code or search').nth(0).fill(values.departureAirport);
	await form.getByPlaceholder('Code or search').nth(1).fill(values.arrivalAirport);
	await form.getByRole('button', { name: 'Add transportation' }).click();
	await expect(dialog).toBeHidden();
}

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

	await dialog.getByLabel('Name', { exact: false }).fill(values.name);
	for (const guestName of values.guestNames ?? []) {
		await dialog.getByRole('checkbox', { name: guestName }).check();
	}
	await dialog.getByRole('button', { name: 'Add lodging' }).click();
	await expect(dialog).toBeHidden();
}

export async function addPackingList(
	page: Page,
	values: { name: string; items: string[] }
): Promise<void> {
	await openAddToTripMenuItem(page, 'Packing List');
	const dialog = page
		.locator('[role="dialog"]')
		.filter({ has: page.getByRole('heading', { name: /Packing list/i }) })
		.first();
	await expect(dialog).toBeVisible();

	await dialog.getByLabel('Name', { exact: false }).fill(values.name);
	const itemInputs = dialog.getByPlaceholder('Item');
	await itemInputs.first().fill(values.items[0]);
	for (const item of values.items.slice(1)) {
		await dialog.getByRole('button', { name: 'Add item' }).click();
		await itemInputs.last().fill(item);
	}
	await dialog.getByRole('button', { name: 'Add', exact: true }).click();
	await expect(dialog).toBeHidden();
}

export async function addActivity(page: Page, values: { name: string }): Promise<void> {
	await openAddToTripMenuItem(page, 'Attractions & Activities');
	const dialog = page
		.locator('[role="dialog"]')
		.filter({ has: page.getByRole('heading', { name: /Attraction & activity/i }) })
		.first();
	await expect(dialog).toBeVisible();
	await dialog.getByLabel('Name', { exact: false }).fill(values.name);
	await dialog.getByRole('button', { name: 'Add' }).click();
	await expect(dialog).toBeHidden();
}