/**
 * Tests for useKeyboardShortcuts hook
 *
 * Verifies keyboard shortcut handling for navigation and actions.
 */

import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import { renderHook } from "@testing-library/react";
import { useKeyboardShortcuts, type ShortcutMap } from "@/hooks/useKeyboardShortcuts";

describe("useKeyboardShortcuts", () => {
  // Helper to dispatch keyboard events
  function dispatchKeyEvent(
    key: string,
    opts: { metaKey?: boolean; ctrlKey?: boolean; shiftKey?: boolean } = {}
  ): void {
    const event = new KeyboardEvent("keydown", {
      key,
      metaKey: opts.metaKey ?? false,
      ctrlKey: opts.ctrlKey ?? false,
      shiftKey: opts.shiftKey ?? false,
      bubbles: true,
    });
    document.dispatchEvent(event);
  }

  it("calls handler when shortcut is pressed (meta key on Mac)", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+1": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    dispatchKeyEvent("1", { metaKey: true });

    expect(handler).toHaveBeenCalledTimes(1);
  });

  it("calls handler when shortcut is pressed (ctrl key fallback)", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+2": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    dispatchKeyEvent("2", { ctrlKey: true });

    expect(handler).toHaveBeenCalledTimes(1);
  });

  it("does not call handler when wrong key is pressed", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+1": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    dispatchKeyEvent("2", { metaKey: true });

    expect(handler).not.toHaveBeenCalled();
  });

  it("does not call handler when modifier is missing", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+1": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    dispatchKeyEvent("1"); // No modifier

    expect(handler).not.toHaveBeenCalled();
  });

  it("handles comma shortcut (mod+,)", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+,": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    dispatchKeyEvent(",", { metaKey: true });

    expect(handler).toHaveBeenCalledTimes(1);
  });

  it("supports multiple shortcuts", () => {
    const handler1 = vi.fn();
    const handler2 = vi.fn();
    const handler3 = vi.fn();

    const shortcuts: ShortcutMap = {
      "mod+1": handler1,
      "mod+2": handler2,
      "mod+3": handler3,
    };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    dispatchKeyEvent("1", { metaKey: true });
    dispatchKeyEvent("3", { metaKey: true });

    expect(handler1).toHaveBeenCalledTimes(1);
    expect(handler2).not.toHaveBeenCalled();
    expect(handler3).toHaveBeenCalledTimes(1);
  });

  it("removes listeners on unmount", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+1": handler };

    const { unmount } = renderHook(() => useKeyboardShortcuts(shortcuts));
    unmount();

    dispatchKeyEvent("1", { metaKey: true });

    expect(handler).not.toHaveBeenCalled();
  });

  it("ignores shortcuts when typing in input fields", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+1": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    // Create and focus an input element
    const input = document.createElement("input");
    document.body.appendChild(input);
    input.focus();

    // Dispatch from the input
    const event = new KeyboardEvent("keydown", {
      key: "1",
      metaKey: true,
      bubbles: true,
    });
    input.dispatchEvent(event);

    expect(handler).not.toHaveBeenCalled();

    // Cleanup
    document.body.removeChild(input);
  });

  it("ignores shortcuts when typing in textarea", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+2": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    const textarea = document.createElement("textarea");
    document.body.appendChild(textarea);
    textarea.focus();

    const event = new KeyboardEvent("keydown", {
      key: "2",
      metaKey: true,
      bubbles: true,
    });
    textarea.dispatchEvent(event);

    expect(handler).not.toHaveBeenCalled();

    document.body.removeChild(textarea);
  });

  it("ignores shortcuts when contenteditable is focused", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+3": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    const div = document.createElement("div");
    div.contentEditable = "true";
    document.body.appendChild(div);
    div.focus();

    const event = new KeyboardEvent("keydown", {
      key: "3",
      metaKey: true,
      bubbles: true,
    });
    div.dispatchEvent(event);

    expect(handler).not.toHaveBeenCalled();

    document.body.removeChild(div);
  });

  it("prevents default behavior when shortcut matches", () => {
    const handler = vi.fn();
    const shortcuts: ShortcutMap = { "mod+1": handler };

    renderHook(() => useKeyboardShortcuts(shortcuts));

    const event = new KeyboardEvent("keydown", {
      key: "1",
      metaKey: true,
      bubbles: true,
      cancelable: true,
    });

    const preventDefaultSpy = vi.spyOn(event, "preventDefault");
    document.dispatchEvent(event);

    expect(preventDefaultSpy).toHaveBeenCalled();
  });
});