import test from "node:test";
import assert from "node:assert/strict";

import { setupModal } from "./video-modal-accessibility.test.mjs";

const FOCUSABLE_SELECTOR = [
  "a[href]",
  "area[href]",
  "button:not([disabled])",
  'input:not([type="hidden"]):not([disabled])',
  "select:not([disabled])",
  "textarea:not([disabled])",
  "iframe",
  "object",
  "embed",
  '[contenteditable="true"]',
  "[tabindex]",
  "audio[controls]",
  "video[controls]",
].join(",");

function createCommentEvent({ id, pubkey, content, createdAt, parentId = null }) {
  const tags = [["e", "video123"], ["a", "30078:authorpk:video-root"]];
  if (parentId) {
    tags.push(["e", parentId]);
  }
  return {
    id,
    pubkey,
    content,
    kind: 1,
    created_at: createdAt,
    tags,
  };
}

test("VideoModal comment section toggles visibility and renders hydrated comments", async (t) => {
  const { document, modal, cleanup } = await setupModal();
  t.after(cleanup);

  const commentsRoot = document.querySelector("[data-comments-root]");
  assert.ok(commentsRoot, "comment root should exist");

  modal.setCommentsVisibility(false);
  assert.equal(commentsRoot.hasAttribute("hidden"), true);
  assert.equal(commentsRoot.classList.contains("hidden"), true);

  modal.setCommentsVisibility(true);
  assert.equal(commentsRoot.hasAttribute("hidden"), false);
  assert.equal(commentsRoot.classList.contains("hidden"), false);

  const snapshot = {
    videoEventId: "video123",
    parentCommentId: null,
    commentsById: new Map([
      [
        "comment-1",
        createCommentEvent({
          id: "comment-1",
          pubkey: "pk1",
          content: "First!",
          createdAt: 1700000000,
        }),
      ],
      [
        "reply-1",
        createCommentEvent({
          id: "reply-1",
          pubkey: "pk2",
          content: "Thanks for sharing",
          createdAt: 1700000005,
          parentId: "comment-1",
        }),
      ],
    ]),
    childrenByParent: new Map([
      [null, ["comment-1"]],
      ["comment-1", ["reply-1"]],
    ]),
    profiles: new Map([
      ["pk1", { name: "Alice" }],
      ["pk2", { name: "Bob" }],
    ]),
  };

  modal.renderComments(snapshot);

  const renderedItems = Array.from(
    modal.commentsList.querySelectorAll("[data-comment-id]"),
  );
  assert.equal(renderedItems.length, 2, "should render top-level comment and reply");

  const topLevel = modal.commentsList.querySelector('[data-comment-id="comment-1"]');
  assert.ok(topLevel, "top-level comment node should render");
  assert.equal(topLevel.dataset.commentDepth, "0");

  const reply = modal.commentsList.querySelector('[data-comment-id="reply-1"]');
  assert.ok(reply, "reply node should render");
  assert.equal(reply.dataset.commentDepth, "1");
  assert.equal(reply.closest("ol").getAttribute("role"), "list");

  const countLabel = document.querySelector("[data-comments-count]");
  assert.equal(countLabel.textContent.trim(), "2 comments");

  const emptyState = document.querySelector("[data-comments-empty]");
  assert.equal(emptyState.hasAttribute("hidden"), true);
  assert.equal(modal.commentsList.getAttribute("data-empty"), null);
});

test("VideoModal comment composer updates messaging and dispatches events", async (t) => {
  const { window, document, modal, cleanup } = await setupModal();
  t.after(cleanup);

  const defaultHint = modal.commentComposerDefaultHint;
  assert.ok(defaultHint);

  modal.setCommentComposerState({ disabled: true, reason: "login-required" });
  assert.equal(modal.commentsInput.disabled, true);
  assert.equal(modal.commentsComposer.hasAttribute("hidden"), false);
  assert.equal(modal.commentsDisabledPlaceholder.hasAttribute("hidden"), true);
  assert.equal(modal.commentComposerHint.textContent.trim(), "Log in to add a comment.");
  assert.equal(modal.commentsStatusMessage.textContent.trim(), "");

  modal.setCommentComposerState({ disabled: false, reason: "error" });
  assert.equal(modal.commentsInput.disabled, false);
  assert.equal(
    modal.commentsStatusMessage.textContent.includes(
      "We couldn't post your comment. Try again?",
    ),
    true,
  );
  assert.ok(modal.commentRetryButton, "retry button should be rendered for error state");

  modal.showCommentsDisabledMessage("Comments have been turned off for this video.");
  modal.setCommentComposerState({ disabled: true, reason: "disabled" });
  assert.equal(modal.commentsComposer.hasAttribute("hidden"), true);
  assert.equal(modal.commentsDisabledPlaceholder.hasAttribute("hidden"), false);

  modal.setCommentComposerState({ disabled: false, reason: "" });
  assert.equal(modal.commentsComposer.hasAttribute("hidden"), false);
  assert.equal(modal.commentsDisabledPlaceholder.hasAttribute("hidden"), true);
  assert.equal(modal.commentComposerHint.textContent.trim(), defaultHint.trim());

  const loginRequests = [];
  const submitEvents = [];
  modal.addEventListener("comment:login-required", (event) => {
    loginRequests.push(event.detail);
  });
  modal.addEventListener("comment:submit", (event) => {
    submitEvents.push(event.detail);
  });

  modal.setCommentComposerState({ disabled: true, reason: "login-required" });
  modal.commentsComposer.dispatchEvent(
    new window.Event("submit", { bubbles: true, cancelable: true }),
  );
  assert.equal(loginRequests.length, 1);
  assert.equal(submitEvents.length, 0);

  modal.setCommentComposerState({ disabled: false, reason: "" });
  modal.commentsInput.value = " New comment ";
  modal.updateCommentCharCount();
  modal.updateCommentSubmitState();
  assert.equal(modal.commentsSubmitButton.disabled, false);

  modal.commentsComposer.dispatchEvent(
    new window.Event("submit", { bubbles: true, cancelable: true }),
  );

  assert.equal(submitEvents.length, 1);
  const submitDetail = submitEvents[0];
  assert.deepStrictEqual(submitDetail.parentId, null);
  assert.equal(submitDetail.text, "New comment");
  assert.strictEqual(submitDetail.triggerElement, modal.commentsSubmitButton);
});

test("VideoModal comment section exposes aria landmarks and participates in focus trap", async (t) => {
  const { window, document, modal, playerModal, trigger, cleanup } = await setupModal();
  t.after(cleanup);

  modal.open(null, { triggerElement: trigger });
  await Promise.resolve();

  const commentsRoot = document.querySelector("[data-comments-root]");
  const commentsHeading = document.getElementById("videoModalCommentsHeading");
  assert.ok(commentsRoot, "comment root should exist when modal opens");
  assert.ok(commentsHeading, "comment heading should exist");
  assert.equal(commentsRoot.getAttribute("role"), "region");
  assert.equal(commentsRoot.getAttribute("aria-labelledby"), commentsHeading.id);
  assert.equal(modal.commentsComposer.getAttribute("aria-labelledby"), commentsHeading.id);

  const commentInput = document.querySelector("[data-comments-input]");
  assert.ok(commentInput, "comment textarea should exist");
  assert.equal(
    commentInput.getAttribute("aria-describedby"),
    "commentComposerHelp commentComposerCount",
  );

  const focusableElements = Array.from(
    playerModal.querySelectorAll(FOCUSABLE_SELECTOR),
  );
  focusableElements.forEach((element) => {
    if (element === commentInput) {
      element.removeAttribute("tabindex");
      element.disabled = false;
      return;
    }
    if (typeof element.disabled === "boolean") {
      element.disabled = true;
    }
    element.setAttribute("tabindex", "-1");
  });

  commentInput.focus();
  const tabEvent = new window.KeyboardEvent("keydown", {
    key: "Tab",
    bubbles: true,
    cancelable: true,
  });
  commentInput.dispatchEvent(tabEvent);

  assert.equal(tabEvent.defaultPrevented, true, "focus trap should intercept Tab");
  const activeAfter = document.activeElement;
  assert.ok(
    activeAfter === commentInput || activeAfter === modal.modalPanel,
    "focus trap should keep focus within the modal",
  );

  modal.close();
});