import { describe, it, expect, vi, beforeEach } from "vitest";
import type { Page } from "playwright";
import { pw_keyboard_sequence, type KbStep } from "./pw_keyboard_sequence";

// ---------------------------------------------------------------------------
// Mock helpers
// ---------------------------------------------------------------------------

const mockFocus = vi.fn().mockResolvedValue(undefined);
const mockFirst = vi.fn().mockReturnValue({ focus: mockFocus });
const mockLocator = vi.fn().mockReturnValue({ first: mockFirst });
const mockType = vi.fn().mockResolvedValue(undefined);
const mockPress = vi.fn().mockResolvedValue(undefined);
const mockWaitForTimeout = vi.fn().mockResolvedValue(undefined);

const mockPage = {
  locator: mockLocator,
  keyboard: {
    type: mockType,
    press: mockPress,
  },
  waitForTimeout: mockWaitForTimeout,
} as unknown as Page;

beforeEach(() => {
  vi.clearAllMocks();
  mockFirst.mockReturnValue({ focus: mockFocus });
  mockLocator.mockReturnValue({ first: mockFirst });
  mockFocus.mockResolvedValue(undefined);
  mockType.mockResolvedValue(undefined);
  mockPress.mockResolvedValue(undefined);
  mockWaitForTimeout.mockResolvedValue(undefined);
});

// ---------------------------------------------------------------------------

describe("pw_keyboard_sequence", () => {
  it("focus calls focus", async () => {
    const sequence: KbStep[] = [{ kind: "focus", selector: "input[name=requester]" }];
    await pw_keyboard_sequence(mockPage, sequence);

    expect(mockLocator).toHaveBeenCalledWith("input[name=requester]");
    expect(mockFirst).toHaveBeenCalledOnce();
    expect(mockFocus).toHaveBeenCalledOnce();
  });

  it("type uses default delay", async () => {
    const sequence: KbStep[] = [{ kind: "type", text: "Enmanuel" }];
    await pw_keyboard_sequence(mockPage, sequence);

    expect(mockType).toHaveBeenCalledWith("Enmanuel", { delay: 30 });
  });

  it("type with explicit delayMs uses that value", async () => {
    const sequence: KbStep[] = [{ kind: "type", text: "hello", delayMs: 100 }];
    await pw_keyboard_sequence(mockPage, sequence);

    expect(mockType).toHaveBeenCalledWith("hello", { delay: 100 });
  });

  it("press routes correctly", async () => {
    const sequence: KbStep[] = [
      { kind: "press", key: "ArrowDown" },
      { kind: "press", key: "Enter" },
    ];
    await pw_keyboard_sequence(mockPage, sequence);

    expect(mockPress).toHaveBeenCalledTimes(2);
    expect(mockPress).toHaveBeenNthCalledWith(1, "ArrowDown");
    expect(mockPress).toHaveBeenNthCalledWith(2, "Enter");
  });

  it("wait calls waitForTimeout", async () => {
    const sequence: KbStep[] = [{ kind: "wait", ms: 200 }];
    await pw_keyboard_sequence(mockPage, sequence);

    expect(mockWaitForTimeout).toHaveBeenCalledWith(200);
  });

  it("unknown kind throws", async () => {
    const sequence = [{ kind: "unknown_step" }] as unknown as KbStep[];
    await expect(pw_keyboard_sequence(mockPage, sequence)).rejects.toThrow(
      'pw_keyboard_sequence: unknown step kind "unknown_step"'
    );
  });

  it("order preserved", async () => {
    const callOrder: string[] = [];

    mockFocus.mockImplementationOnce(async () => { callOrder.push("focus"); });
    mockType.mockImplementationOnce(async () => { callOrder.push("type"); });
    mockWaitForTimeout.mockImplementationOnce(async () => { callOrder.push("wait"); });
    mockPress.mockImplementationOnce(async () => { callOrder.push("press"); });

    const sequence: KbStep[] = [
      { kind: "focus", selector: "input" },
      { kind: "type", text: "abc" },
      { kind: "wait", ms: 50 },
      { kind: "press", key: "Enter" },
    ];

    await pw_keyboard_sequence(mockPage, sequence);

    expect(callOrder).toEqual(["focus", "type", "wait", "press"]);
  });
});
