// @vitest-environment happy-dom
import { afterEach, beforeAll, describe, expect, it, vi } from "vitest";

import { renderSidebar } from "./catalog.js";
import { closeContextMenu } from "./contextMenu.js";
import type { CatalogListener, CatalogStore } from "./events.js";
import type { Session } from "./types.js";
import { normalizeSessionName } from "./types.js";

beforeAll(() => {
  Object.defineProperty(window, "localStorage", {
    value: { getItem: () => null, setItem: () => {} },
  });
});

let mounted: { el: HTMLElement; dispose: () => void } | null = null;

afterEach(() => {
  closeContextMenu();
  mounted?.dispose();
  mounted = null;
  vi.unstubAllGlobals();
});

function session(overrides: Partial<Session> = {}): Session {
  return {
    id: "aaaaaaaa-0000-0000-0000-0000000000ff",
    cwd: "/home/naps/tea/maestro",
    command: "claude",
    env: {},
    metadata: { name: "amber-falcon" },
    status: "Running",
    created_at: "2026-08-24T10:00:00Z",
    ...overrides,
  };
}

function storeWith(sessions: Session[]): CatalogStore {
  const state = { sessions: new Map(sessions.map((s) => [s.id, s])) };
  return {
    snapshot: () => state,
    subscribe: (fn: CatalogListener) => {
      fn(state);
      return () => {};
    },
  } as unknown as CatalogStore;
}

/** Mount a sidebar with one session; the handle is disposed after each test. */
function mount(s: Session): HTMLElement {
  vi.stubGlobal(
    "fetch",
    vi.fn(() => Promise.reject(new Error("offline"))),
  );
  const handle = renderSidebar(storeWith([s]));
  mounted = handle;
  return handle.el;
}

function cardIn(el: HTMLElement, s: Session): HTMLElement {
  return el.querySelector<HTMLElement>(`[data-session-id="${s.id}"]`) as HTMLElement;
}

/** Mount a sidebar with one session and right-click its card. */
function openCardMenu(s: Session): { el: HTMLElement; row: HTMLElement } {
  const el = mount(s);
  const row = cardIn(el, s);
  row.dispatchEvent(new Event("contextmenu", { bubbles: true, cancelable: true }));
  return { el, row };
}

function menuItem(label: string): HTMLButtonElement {
  const found = [...document.querySelectorAll<HTMLButtonElement>(".context-menu-item")].find(
    (b) => b.textContent === label,
  );
  if (!found) throw new Error(`no "${label}" entry in the context menu`);
  return found;
}

describe("session name normalisation (#125)", () => {
  it("trims, and treats a blank name as a clear", () => {
    expect(normalizeSessionName("  amber-falcon ")).toBe("amber-falcon");
    expect(normalizeSessionName("   ")).toBe("");
  });

  it("caps at the daemon's limit, counting code points", () => {
    expect(normalizeSessionName("x".repeat(80))).toHaveLength(64);
    expect([...normalizeSessionName("é".repeat(80))]).toHaveLength(64);
  });
});

describe("sidebar card context menu (#125)", () => {
  it("suppresses the browser menu and offers rename, spawn similar and kill", () => {
    const s = session();
    const row = cardIn(mount(s), s);
    const ev = new Event("contextmenu", { bubbles: true, cancelable: true });
    row.dispatchEvent(ev);
    expect(ev.defaultPrevented).toBe(true);
    expect([...document.querySelectorAll(".context-menu-item")].map((b) => b.textContent)).toEqual([
      "Rename…",
      "Spawn similar",
      "Kill session",
    ]);
  });

  it("spawn similar dispatches the same event the ⧉ button does", () => {
    const s = session();
    openCardMenu(s);
    const seen = vi.fn();
    document.addEventListener("catalog-spawn-similar", seen);
    menuItem("Spawn similar").click();
    document.removeEventListener("catalog-spawn-similar", seen);
    expect(seen).toHaveBeenCalledOnce();
  });
});

describe("inline rename (#125)", () => {
  it("pre-fills the field with the session's own name", () => {
    const { row } = openCardMenu(session());
    menuItem("Rename…").click();
    const input = row.querySelector<HTMLInputElement>("input.leaf-rename");
    expect(input?.value).toBe("amber-falcon");
    expect(row.querySelector("span.leaf-name")).toBeNull();
  });

  it("starts empty for a session that has no name of its own", () => {
    const { row } = openCardMenu(session({ metadata: {} }));
    menuItem("Rename…").click();
    expect(row.querySelector<HTMLInputElement>("input.leaf-rename")?.value).toBe("");
  });

  it("holds the tree still while the field is open", () => {
    const s = session();
    const { el, row } = openCardMenu(s);
    menuItem("Rename…").click();
    const input = row.querySelector<HTMLInputElement>("input.leaf-rename");
    // A catalog delta mid-edit must not rebuild the row out from under it.
    document.dispatchEvent(new CustomEvent("catalog-rerender"));
    expect(cardIn(el, s).querySelector("input.leaf-rename")).toBe(input);
  });

  it("Enter PATCHes the session with the typed name", () => {
    const s = session();
    const { row } = openCardMenu(s);
    menuItem("Rename…").click();
    const input = row.querySelector<HTMLInputElement>("input.leaf-rename") as HTMLInputElement;
    input.value = "crimson-otter";

    const fetchMock = vi.fn(() =>
      Promise.resolve(new Response(JSON.stringify(s), { status: 200 })),
    );
    vi.stubGlobal("fetch", fetchMock);
    input.dispatchEvent(new KeyboardEvent("keydown", { key: "Enter", bubbles: true }));

    expect(fetchMock).toHaveBeenCalledOnce();
    const [url, init] = fetchMock.mock.calls[0] as unknown as [string, RequestInit];
    expect(url).toBe(`/api/sessions/${s.id}`);
    expect(init.method).toBe("PATCH");
    expect(JSON.parse(init.body as string)).toEqual({ name: "crimson-otter" });
  });

  it("Escape cancels without a request and restores the name", () => {
    const s = session();
    const { el, row } = openCardMenu(s);
    menuItem("Rename…").click();
    const input = row.querySelector<HTMLInputElement>("input.leaf-rename") as HTMLInputElement;
    input.value = "discarded";

    const fetchMock = vi.fn(() => Promise.reject(new Error("offline")));
    vi.stubGlobal("fetch", fetchMock);
    input.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true }));

    expect(fetchMock).not.toHaveBeenCalled();
    // The row is rebuilt from the store, so the old name comes back.
    expect(cardIn(el, s).querySelector(".leaf-name")?.textContent).toBe("amber-falcon");
    expect(cardIn(el, s).querySelector("input.leaf-rename")).toBeNull();
  });
});