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

export async function openMoreMenu(page: Page): Promise<Locator> {
  const moreButton = page.getByTestId("tab-more");
  await expect(moreButton).toBeVisible();
  await moreButton.click();
  return moreButton;
}

export async function expectModalVisible(modal: Locator): Promise<void> {
  await expect(modal).toBeVisible();
  await expect(modal).toHaveAttribute("aria-hidden", "false");
}

export async function expectModalHidden(modal: Locator): Promise<void> {
  await expect(modal).not.toBeVisible();
  await expect(modal).toHaveAttribute("aria-hidden", "true");
}

export async function editorClear(editor: Locator): Promise<void> {
  const content = editor.locator(".cm-content");
  // wait for the async content load, otherwise clearing races the arriving text
  await expect(content).not.toHaveText("");
  await content.click();
  await editor.page().keyboard.press("ControlOrMeta+KeyA");
  await editor.page().keyboard.press("Backspace");
  await expect(content, "editor should be empty after clearing").toHaveText("");
}

export async function editorPaste(editor: Locator, page: Page, text: string): Promise<void> {
  await editor.locator(".cm-content").click();
  await page.evaluate((text) => navigator.clipboard.writeText(text), text);
  await page.keyboard.press("ControlOrMeta+KeyV");
}

export enum LoadpointType {
  Charging = "charging",
  Heating = "heating",
}

export enum ChargerStatus {
  Disconnected = "A",
  Connected = "B",
  Charging = "C",
}

export async function addDemoCharger(
  page: Page,
  type: LoadpointType = LoadpointType.Charging,
  status?: ChargerStatus
): Promise<void> {
  const lpModal = page.getByTestId("loadpoint-modal");
  await lpModal
    .getByRole("button", {
      name: type === LoadpointType.Heating ? "Add heating device" : "Add charger",
    })
    .click();

  const modal = page.getByTestId("charger-modal");
  await expectModalVisible(modal);
  await modal
    .getByLabel("Manufacturer")
    .selectOption(type === LoadpointType.Heating ? "Demo heat pump" : "Demo charger");
  if (status) {
    await modal.getByLabel("Charge status").selectOption(status);
  }
  await modal.getByRole("button", { name: "Save" }).click();
  await expectModalHidden(modal);
  await expectModalVisible(lpModal);
}

export async function addDemoMeter(page: Page, power = "0"): Promise<void> {
  const lpModal = page.getByTestId("loadpoint-modal");
  await lpModal.getByRole("link", { name: "Advanced configuration" }).click();
  await lpModal.getByRole("button", { name: "Add dedicated energy meter" }).click();

  const modal = page.getByTestId("meter-modal");
  await expectModalVisible(modal);
  await modal.getByLabel("Manufacturer").selectOption("Demo meter");
  await modal.getByLabel("Power").fill(power);
  await modal.getByRole("button", { name: "Save" }).click();
  await expectModalHidden(modal);
  await expectModalVisible(lpModal);
}

export async function addVehicle(page: Page, title: string): Promise<void> {
  await page.getByRole("button", { name: "Add vehicle" }).click();
  const modal = page.getByTestId("vehicle-modal");
  await expectModalVisible(modal);
  await modal.getByLabel("Manufacturer").selectOption("Generic vehicle (without API)");
  await modal.getByLabel("Title").fill(title);
  await modal.getByRole("button", { name: "Validate & save" }).click();
  await expectModalHidden(modal);
}

export async function newLoadpoint(
  page: Page,
  title: string,
  type: LoadpointType = LoadpointType.Charging
): Promise<void> {
  const lpModal = page.getByTestId("loadpoint-modal");
  await page.getByRole("button", { name: "Add charging point or heater" }).click();
  await expectModalVisible(lpModal);
  await lpModal
    .getByRole("button", {
      name: type === LoadpointType.Heating ? "Add heater" : "Add charging point",
    })
    .click();
  await lpModal.getByLabel("Title").fill(title);
}

export async function finishLoadpoint(page: Page): Promise<void> {
  const lpModal = page.getByTestId("loadpoint-modal");
  await lpModal.getByText("Close", { exact: true }).click();
  await expectModalHidden(lpModal);
}

export async function dragElement(
  page: Page,
  sourceElement: Locator,
  targetElement: Locator
): Promise<void> {
  // hover() waits for animations to settle before grabbing the source —
  // avoids stale coordinates during the modal slide-in.
  await sourceElement.hover();
  await page.mouse.down();

  const targetBox = await targetElement.boundingBox();
  if (!targetBox) throw new Error("dragElement: target has no bounding box");
  await page.mouse.move(targetBox.x + targetBox.width / 2, targetBox.y + targetBox.height / 2, {
    steps: 10,
  });
  await page.mouse.up();
}

export async function getDatalistOptions(input: Locator): Promise<string[]> {
  return input.evaluate((element: HTMLInputElement) => {
    const datalistId = element.getAttribute("list");
    if (!datalistId) return [];
    const datalist = document.getElementById(datalistId);
    return Array.from(datalist?.querySelectorAll("option") || []).map((opt) => opt.value);
  });
}

type AppState = {
  evccAppCapabilities: string[];
  __appEvent: unknown;
  ReactNativeWebView: { postMessage: (m: string) => void };
};

export async function enableAppContext(page: Page): Promise<void> {
  await page.addInitScript(() => {
    Object.defineProperty(navigator, "userAgent", {
      value: "evcc/playwright",
      configurable: true,
    });
    const w = window as unknown as AppState;
    w.evccAppCapabilities = ["download"];
    w.__appEvent = undefined;
    w.ReactNativeWebView = {
      postMessage: (msg: string) => {
        w.__appEvent = JSON.parse(msg);
      },
    };
  });
}

export async function expectAppEvent(page: Page): Promise<unknown> {
  await expect
    .poll(async () => page.evaluate(() => (window as unknown as AppState).__appEvent !== undefined))
    .toBe(true);
  return page.evaluate(() => (window as unknown as AppState).__appEvent);
}