// @vitest-environment happy-dom
//
// The sidebar's search field is the touch entry point to the command bar
// (#157, docs/COMMAND-BAR.md "Touch entry"): tapping or focusing it asks the
// shell to open the bar with an empty query, instead of filtering the tree.
import { beforeAll, describe, expect, it } from "vitest";

import { OPEN_COMMAND_BAR_EVENT, renderSidebar } from "./catalog.js";
import { sessionBarCandidates } from "./commandBar.js";
import { matchAndRank } from "./matcher.js";
import type { CatalogListener, CatalogStore } from "./events.js";
import type { Session } from "./types.js";

beforeAll(() => {
  Object.defineProperty(window, "localStorage", {
    value: { getItem: () => null, setItem: () => {} },
  });
  window.fetch = () => Promise.reject(new Error("offline"));
});

function session(id: string, cwd: string): Session {
  return {
    id,
    name: id,
    cwd,
    command: "claude",
    env: {},
    metadata: {},
    status: "Running",
    created_at: "2026-08-24T10:00:00Z",
  } as Session;
}

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;
}

function mount(sessions: Session[] = [session("alpha", "/home/n/alpha")]) {
  const handle = renderSidebar(storeWith(sessions));
  document.body.appendChild(handle.el);
  const search = handle.el.querySelector<HTMLInputElement>(".search")!;
  const opens: number[] = [];
  const listener = () => opens.push(1);
  document.addEventListener(OPEN_COMMAND_BAR_EVENT, listener);
  return {
    handle,
    search,
    opens,
    dispose: () => {
      document.removeEventListener(OPEN_COMMAND_BAR_EVENT, listener);
      handle.dispose();
      handle.el.remove();
    },
  };
}

describe("sidebar search field opens the command bar (#157)", () => {
  it("asks the shell to open the bar when the field is focused", () => {
    const t = mount();
    t.search.dispatchEvent(new FocusEvent("focus"));
    expect(t.opens).toHaveLength(1);
    t.dispose();
  });

  it("opens on a tap, where a focus event may never arrive", () => {
    const t = mount();
    t.search.dispatchEvent(new Event("pointerdown", { bubbles: true }));
    expect(t.opens).toHaveLength(1);
    t.dispose();
  });

  it("does not trap the keyboard in the field: it gives focus up on open", () => {
    const t = mount();
    t.search.focus();
    expect(document.activeElement).not.toBe(t.search);
    t.dispose();
  });

  it("opens the bar with an empty query — the field never holds one", () => {
    const t = mount();
    t.search.focus();
    expect(t.search.value).toBe("");
    t.dispose();
  });

  it("is readonly: no on-screen keyboard over a field nothing is typed into", () => {
    const t = mount();
    expect(t.search.readOnly).toBe(true);
    t.dispose();
  });

  it("no longer filters the tree in place", () => {
    const t = mount([session("alpha", "/home/n/alpha"), session("beta", "/home/n/beta")]);
    t.search.value = "alpha";
    t.search.dispatchEvent(new Event("input"));
    expect(t.handle.el.querySelectorAll(".tree-leaf")).toHaveLength(2);
    t.dispose();
  });

  it("has no 'No matches' state left: an empty catalog is empty, not filtered", () => {
    const t = mount([]);
    expect(t.handle.el.querySelector(".empty-title")?.textContent).toBe("No sessions yet");
    t.dispose();
  });
});

// The inline filter matched a session on its name and its directory, case- and
// whitespace-insensitively. That behaviour did not go away with the field — it
// moved into the bar, which ranks the same two fields (docs/COMMAND-BAR.md).
describe("what the retired inline filter did, the bar now does", () => {
  it("matches a session on both its name and its directory", () => {
    const sessions = [session("alpha", "/home/n/alpha"), session("beta", "/home/n/beta")];
    const candidates = sessionBarCandidates(sessions, "/home/n");

    const byName = matchAndRank("alpha", candidates).map((r) => r.candidate.session.id);
    expect(byName).toEqual(["alpha"]);

    const byDir = matchAndRank("beta", candidates).map((r) => r.candidate.session.id);
    expect(byDir).toEqual(["beta"]);
  });

  it("ignores case and surrounding whitespace, and shows nothing on no match", () => {
    const candidates = sessionBarCandidates([session("alpha", "/home/n/Alpha")], "/home/n");

    expect(matchAndRank("  ALPHA  ", candidates)).toHaveLength(1);
    expect(matchAndRank("zzz", candidates)).toHaveLength(0);
  });
});