// @vitest-environment happy-dom
// Enter submits the draft form from any field, at any point (#97). The two
// exceptions: a picker button that isn't yet the active choice takes the
// Enter to *choose* it instead (the next Enter submits), and the project
// filter must resolve to the highlighted project rather than sending
// whatever cwd was already set.
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

import { createSpawnForm, type SpawnFormHandle } from "./spawnForm.js";
import type { Project } from "./types.js";

const MAESTRO: Project = {
  path: "/home/user/tea/maestro",
  name: "maestro",
  is_worktree: false,
  last_activity: "2026-08-20T10:00:00Z",
};

const WT_A: Project = {
  path: "/home/user/tea/maestro/worktrees/bulgarians",
  name: "bulgarians",
  is_worktree: true,
  base_repo: MAESTRO.path,
  last_activity: "2026-08-22T10:00:00Z",
};

const OTHER: Project = {
  path: "/home/user/tea/rev",
  name: "rev",
  is_worktree: false,
  last_activity: "2026-08-19T10:00:00Z",
};

function stubFetch(projects: Project[]): void {
  vi.stubGlobal(
    "fetch",
    vi.fn(async (input: RequestInfo | URL) => {
      const url = String(input);
      const body = url.includes("/api/projects")
        ? projects
        : url.includes("/api/names")
          ? { names: ["amber-fox"] }
          : url.includes("/api/branches")
            ? []
            : url.includes("/api/dirs")
              ? { path: "/opt", entries: ["nomatch-zzz"], truncated: false }
              : { hostname: "h", version: "0", home_dir: "/home/user", presets: [] };
      return new Response(JSON.stringify(body), { status: 200 });
    }),
  );
}

describe("spawnForm Enter-to-submit (#97)", () => {
  let handle: SpawnFormHandle | null = null;

  beforeEach(() => {
    vi.useFakeTimers({ now: Date.parse("2026-08-23T12:00:00Z") });
  });

  afterEach(() => {
    handle?.destroy();
    handle = null;
    vi.unstubAllGlobals();
    vi.useRealTimers();
  });

  const drain = async () => {
    for (let i = 0; i < 40; i++) await Promise.resolve();
  };

  async function mount(projects: Project[]): Promise<HTMLFormElement> {
    stubFetch(projects);
    handle = createSpawnForm({ onSuccess() {} });
    document.body.appendChild(handle.el);
    await drain();
    return handle.el;
  }

  function submitSpy(): ReturnType<typeof vi.fn> {
    return vi.fn();
  }

  function pressEnter(el: HTMLElement): { defaultPrevented: boolean } {
    const evt = new KeyboardEvent("keydown", { key: "Enter", bubbles: true, cancelable: true });
    el.dispatchEvent(evt);
    return { defaultPrevented: evt.defaultPrevented };
  }

  const box = (form: HTMLFormElement, path: string) =>
    form.querySelector<HTMLButtonElement>(`.project-box[data-cwd="${path}"]`)!;

  it("toggles the worktree checkbox on Enter instead of submitting (TUI parity)", async () => {
    const form = await mount([MAESTRO]);
    box(form, MAESTRO.path).click();
    await drain();
    const toggle = form.querySelector<HTMLInputElement>("input[name=worktree_enabled]")!;
    expect(toggle.checked).toBe(true);
    const spy = submitSpy();
    form.addEventListener("submit", spy);

    pressEnter(toggle);
    expect(toggle.checked).toBe(false);
    expect(spy).not.toHaveBeenCalled();

    pressEnter(toggle);
    expect(toggle.checked).toBe(true);
    expect(spy).not.toHaveBeenCalled();
  });

  describe("submits immediately from ordinary fields", () => {
    it("name field", async () => {
      const form = await mount([MAESTRO]);
      box(form, MAESTRO.path).click();
      await drain();
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(form.querySelector<HTMLInputElement>("input[name=name]")!);

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

    it("worktree branch field", async () => {
      const form = await mount([MAESTRO]);
      box(form, MAESTRO.path).click();
      await drain();
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(form.querySelector<HTMLInputElement>("input[name=worktree_branch]")!);

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

    it("custom command field", async () => {
      const form = await mount([MAESTRO]);
      box(form, MAESTRO.path).click();
      await drain();
      form.querySelector<HTMLButtonElement>('.cmd-tiles .tile[data-id="custom"]')!.click();
      const raw = form.querySelector<HTMLInputElement>(".cmd-raw")!;
      raw.value = "bash -l";
      raw.dispatchEvent(new Event("input"));
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(raw);

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

    it("raw cwd field once the autocomplete dropdown is closed", async () => {
      const form = await mount([MAESTRO]);
      form.querySelector<HTMLButtonElement>(".project-other")!.click();
      const raw = form.querySelector<HTMLInputElement>("input[name=cwd_raw]")!;
      raw.value = "/opt/xyz-nothing-here";
      raw.dispatchEvent(new Event("input"));
      await vi.advanceTimersByTimeAsync(300);
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(raw);

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

    it("does not submit while the raw cwd autocomplete has a highlighted suggestion", async () => {
      const form = await mount([MAESTRO]);
      form.querySelector<HTMLButtonElement>(".project-other")!.click();
      const raw = form.querySelector<HTMLInputElement>("input[name=cwd_raw]")!;
      raw.focus();
      raw.value = "/opt/";
      raw.dispatchEvent(new Event("input", { bubbles: true }));
      await vi.advanceTimersByTimeAsync(150);
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      const { defaultPrevented } = pressEnter(raw);

      expect(defaultPrevented).toBe(true);
      expect(spy).not.toHaveBeenCalled();
      expect(raw.value).toBe("/opt/nomatch-zzz/");
    });
  });

  describe("two-step picker: first Enter chooses, second submits", () => {
    it("project box", async () => {
      const form = await mount([MAESTRO]);
      const b = box(form, MAESTRO.path);
      b.focus();
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      const first = pressEnter(b);
      expect(first.defaultPrevented).toBe(true);
      expect(b.classList.contains("is-active")).toBe(true);
      expect(spy).not.toHaveBeenCalled();

      pressEnter(b);
      expect(spy).toHaveBeenCalledTimes(1);
    });

    it("worktree choice", async () => {
      const form = await mount([MAESTRO, WT_A]);
      box(form, MAESTRO.path).click();
      await drain();
      const choice = form.querySelector<HTMLButtonElement>(`.wt-choice[data-cwd="${WT_A.path}"]`)!;
      expect(choice.classList.contains("is-active")).toBe(false); // "+ new" is the default
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(choice);
      expect(choice.classList.contains("is-active")).toBe(true);
      expect(spy).not.toHaveBeenCalled();

      pressEnter(choice);
      expect(spy).toHaveBeenCalledTimes(1);
    });
  });

  describe("project filter", () => {
    it("submits with the highlighted (first matching) project, not the filter text", async () => {
      const form = await mount([MAESTRO, OTHER]);
      const filter = form.querySelector<HTMLInputElement>(".project-filter")!;
      filter.value = "rev";
      filter.dispatchEvent(new Event("input"));
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(filter);

      expect(spy).toHaveBeenCalledTimes(1);
      expect(box(form, OTHER.path).classList.contains("is-active")).toBe(true);
    });

    it("does not clobber an already-chosen worktree when the filter still matches it", async () => {
      const form = await mount([MAESTRO, WT_A]);
      box(form, MAESTRO.path).click();
      await drain();
      form.querySelector<HTMLButtonElement>(`.wt-choice[data-cwd="${WT_A.path}"]`)!.click();
      await drain();

      const filter = form.querySelector<HTMLInputElement>(".project-filter")!;
      filter.value = "maestro";
      filter.dispatchEvent(new Event("input"));
      const spy = submitSpy();
      form.addEventListener("submit", spy);

      pressEnter(filter);

      expect(spy).toHaveBeenCalledTimes(1);
      expect(
        form.querySelector<HTMLButtonElement>(`.wt-choice[data-cwd="${WT_A.path}"]`)!.classList.contains(
          "is-active",
        ),
      ).toBe(true);
    });
  });
});