import { expect } from '@playwright/test';
import { Given, When, Then } from 'playwright-bdd/decorators';
import { createBdd } from 'playwright-bdd';
import { waitForAppReady, seedItems, seedAndNavigate, clearItems } from '../support/seed';
import { buildItem, buildCheckedOutItem, buildConsumableItem, buildItemAtLocation, resetCounter } from '../support/item-factory';
import { assertMinTouchTarget, assertWithinViewport } from '../support/layout';

const { Given: given, When: when, Then: then } = createBdd();

// --- Navigation ---

given('I am on the {string} page', async ({ page }, path: string) => {
  const routeMap: Record<string, string> = {
    dashboard: '/',
    items: '/items',
    'new item': '/items/new',
    scan: '/scan',
    locations: '/locations',
    labels: '/labels',
    settings: '/settings',
  };
  const url = routeMap[path] ?? path;
  await page.goto(url);
  await waitForAppReady(page);
});

given('I navigate to {string}', async ({ page }, path: string) => {
  await page.goto(path);
  await waitForAppReady(page);
});

// --- Seeding ---

given('the inventory is empty', async ({ page }) => {
  await page.goto('/');
  await waitForAppReady(page);
  await clearItems(page);
  await page.reload();
  await waitForAppReady(page);
});

given('there are {int} items in the inventory', async ({ page }, count: number) => {
  resetCounter();
  const items = Array.from({ length: count }, (_, i) =>
    buildItem({ name: `Item ${i + 1}`, category: i % 2 === 0 ? 'Electronics' : 'Kitchen' })
  );
  await page.goto('/');
  await waitForAppReady(page);
  await seedItems(page, items);
});

given('there is an item {string} in category {string}', async ({ page }, name: string, category: string) => {
  const item = buildItem({ name, category });
  await page.goto('/');
  await waitForAppReady(page);
  await seedItems(page, [item]);
});

given('there is a checked-out item {string}', async ({ page }, name: string) => {
  const item = buildCheckedOutItem({ name });
  await page.goto('/');
  await waitForAppReady(page);
  await seedItems(page, [item]);
});

given('there is a consumable item {string} with {int} of {int} remaining', async ({ page }, name: string, current: number, original: number) => {
  const item = buildConsumableItem({ name, currentQuantity: current, originalQuantity: original, lowThreshold: Math.floor(original * 0.3) });
  await page.goto('/');
  await waitForAppReady(page);
  await seedItems(page, [item]);
});

given('there is an item {string} at location {string}', async ({ page }, name: string, locationId: string) => {
  const item = buildItemAtLocation(locationId, { name });
  await page.goto('/');
  await waitForAppReady(page);
  await seedItems(page, [item]);
});

// --- Interaction ---

when('I click {string}', async ({ page }, text: string) => {
  await page.getByRole('button', { name: text }).or(page.getByRole('link', { name: text })).click();
});

when('I click the {string} button', async ({ page }, text: string) => {
  await page.getByRole('button', { name: text }).click();
});

when('I click the {string} link', async ({ page }, text: string) => {
  await page.getByRole('link', { name: text }).click();
});

when('I fill in {string} with {string}', async ({ page }, label: string, value: string) => {
  await page.getByLabel(label).fill(value);
});

when('I select {string} from {string}', async ({ page }, value: string, label: string) => {
  await page.getByLabel(label).selectOption(value);
});

when('I type {string} into the search field', async ({ page }, text: string) => {
  await page.getByPlaceholder('Search items...').fill(text);
});

// --- Assertions ---

then('I should see {string}', async ({ page }, text: string) => {
  await expect(page.getByText(text, { exact: false })).toBeVisible();
});

then('I should not see {string}', async ({ page }, text: string) => {
  await expect(page.getByText(text, { exact: false })).not.toBeVisible();
});

then('I should be on {string}', async ({ page }, path: string) => {
  await expect(page).toHaveURL(new RegExp(path));
});

then('the page title should be {string}', async ({ page }, title: string) => {
  await expect(page.getByRole('heading', { level: 1 })).toHaveText(title);
});

// --- Visual ---

then('the page should match the screenshot {string}', async ({ page }, name: string) => {
  await expect(page).toHaveScreenshot(`${name}.png`);
});

// --- Layout ---

then('all nav buttons should be touch-target sized', async ({ page }) => {
  const navLinks = page.locator('nav a');
  const count = await navLinks.count();
  for (let i = 0; i < count; i++) {
    await assertMinTouchTarget(navLinks.nth(i));
  }
});

then('the bottom nav should be within the viewport', async ({ page }) => {
  const nav = page.locator('nav');
  await assertWithinViewport(nav, page);
});