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

import { installMockBridge } from "../helpers/bridge";

const SIDEBAR_WIDTH_STORAGE_KEY = "sprout-sidebar-width";
const DEFAULT_SIDEBAR_WIDTH = 300;

test.beforeEach(async ({ page }) => {
  await installMockBridge(page);
});

async function sidebarWidth(page: Page) {
  return page.getByTestId("app-sidebar").evaluate((element) => {
    return Math.round(element.getBoundingClientRect().width);
  });
}

async function storedSidebarWidth(page: Page) {
  return page.evaluate(
    (key) => localStorage.getItem(key),
    SIDEBAR_WIDTH_STORAGE_KEY,
  );
}

async function dragSidebarRail(page: Page, deltaX: number) {
  const sidebarRail = page.locator('[data-sidebar="rail"]');
  await expect(sidebarRail).toBeVisible();
  await expect(sidebarRail).toBeEnabled();

  const box = await sidebarRail.boundingBox();
  expect(box).not.toBeNull();

  if (!box) return;

  const startX = box.x + box.width / 2;
  const startY = box.y + box.height / 2;

  await page.mouse.move(startX, startY);
  await page.mouse.down();
  await page.mouse.move(startX + deltaX, startY, { steps: 8 });
  await page.mouse.up();
}

test("resizes, persists, and snaps to the default sidebar width", async ({
  page,
}) => {
  await page.goto("/");
  await expect(page.getByTestId("app-sidebar")).toBeVisible();

  await expect.poll(() => sidebarWidth(page)).toBe(DEFAULT_SIDEBAR_WIDTH);
  await expect.poll(() => storedSidebarWidth(page)).toBeNull();

  await dragSidebarRail(page, 64);

  await expect.poll(() => sidebarWidth(page)).toBe(364);
  await expect.poll(() => storedSidebarWidth(page)).toBe("364");

  await page.reload();
  await expect(page.getByTestId("app-sidebar")).toBeVisible();
  await expect.poll(() => sidebarWidth(page)).toBe(364);

  await dragSidebarRail(page, -60);

  await expect.poll(() => sidebarWidth(page)).toBe(DEFAULT_SIDEBAR_WIDTH);
  await expect
    .poll(() => storedSidebarWidth(page))
    .toBe(String(DEFAULT_SIDEBAR_WIDTH));
});