import { validateArrayDefinition } from "/packages/contracts/validation.js";

function assertNear(actual, expected, tolerance, label) {
  assert(
    Math.abs(actual - expected) <= tolerance,
    label + ": expected " + expected + ", received " + actual,
  );
}

async function waitFor(predicate, label, timeoutMs = 20000) {
  const deadline = performance.now() + timeoutMs;
  while (performance.now() < deadline) {
    const value = predicate();
    if (value) return value;
    await new Promise((resolve) => setTimeout(resolve, 40));
  }
  throw new Error(label + " 대기 시간이 초과되었습니다.");
}

async function nextPaint(windowObject) {
  await new Promise((resolve) => windowObject.requestAnimationFrame(() =>
    windowObject.requestAnimationFrame(resolve)));
}

function dispatchValue(windowObject, element, value, eventName = "change") {
  element.value = String(value);
  element.dispatchEvent(new windowObject.Event(eventName, { bubbles: true }));
}

function dispatchFiles(windowObject, input, files) {
  const transfer = new windowObject.DataTransfer();
  for (const file of files) transfer.items.add(file);
  input.files = transfer.files;
  input.dispatchEvent(new windowObject.Event("change", { bubbles: true }));
}

function microphoneButtons(documentObject) {
  return [...documentObject.querySelectorAll("#microphone-list [data-microphone-id]")];
}

function microphoneCount(documentObject) {
  return microphoneButtons(documentObject).length;
}

function selectedCoordinates(documentObject) {
  return ["microphone-x", "microphone-y", "microphone-z"].map(
    (id) => Number(documentObject.getElementById(id).value),
  );
}

test("Array Builder가 preset·직접 편집·검증·표준 JSON round trip을 완주한다", async () => {
  const frame = document.createElement("iframe");
  frame.src = "/apps/array-builder/?integration-test=1";
  frame.style.cssText =
    "position:fixed;left:-20000px;top:0;width:1400px;height:1000px;border:0";
  document.body.append(frame);
  await new Promise((resolve, reject) => {
    frame.addEventListener("load", resolve, { once: true });
    frame.addEventListener(
      "error",
      () => reject(new Error("Array Builder iframe load failed")),
      { once: true },
    );
  });

  const windowObject = frame.contentWindow;
  const documentObject = frame.contentDocument;
  const downloads = [];
  const originalCreate = windowObject.URL.createObjectURL.bind(windowObject.URL);
  const originalRevoke = windowObject.URL.revokeObjectURL.bind(windowObject.URL);
  const originalAnchorClick = windowObject.HTMLAnchorElement.prototype.click;
  windowObject.URL.createObjectURL = (blob) => {
    const url = "blob:array-builder-test-" + String(downloads.length + 1);
    downloads.push({ blob, url, fileName: null });
    return url;
  };
  windowObject.URL.revokeObjectURL = () => {};
  windowObject.HTMLAnchorElement.prototype.click = function captureDownload() {
    const download = downloads.find((item) => item.url === this.href);
    if (download) download.fileName = this.download;
  };

  try {
    await waitFor(
      () => documentObject.documentElement.dataset.appReady === "true",
      "Array Builder 초기화",
    );
    await waitFor(
      () => documentObject.documentElement.dataset.arrayValid === "true",
      "기본 Array 검증",
    );
    await waitFor(
      () => documentObject.querySelector("#array-canvas").width > 0,
      "Array canvas 렌더",
    );
    assertEqual(microphoneCount(documentObject), 12, "default 4x3 channels");
    assertEqual(
      documentObject.querySelector("#microphone-list [data-microphone-id]").dataset.microphoneId,
      "mic-001",
      "physical channel order starts at mic-001",
    );
    assert(
      documentObject.querySelector("#array-canvas").getBoundingClientRect().height >= 500,
      "canvas dominates the desktop workspace",
    );

    dispatchValue(windowObject, documentObject.querySelector("#preset-columns"), 3);
    dispatchValue(windowObject, documentObject.querySelector("#preset-rows"), 2);
    documentObject.querySelector("#generate-preset-button").click();
    await waitFor(() => microphoneCount(documentObject) === 6, "3x2 grid generation");
    assertEqual(
      microphoneButtons(documentObject).map((button) => button.dataset.microphoneId).join(","),
      "mic-001,mic-002,mic-003,mic-004,mic-005,mic-006",
      "grid keeps row-major physical channel IDs",
    );

    dispatchValue(windowObject, documentObject.querySelector("#aperture-shape"), "ellipse");
    dispatchValue(windowObject, documentObject.querySelector("#preset-type"), "ring");
    dispatchValue(windowObject, documentObject.querySelector("#preset-count"), 8);
    documentObject.querySelector("#generate-preset-button").click();
    await waitFor(() => microphoneCount(documentObject) === 8, "ellipse ring generation");
    await waitFor(
      () => documentObject.documentElement.dataset.arrayValid === "true",
      "ellipse ring validation",
    );

    dispatchValue(windowObject, documentObject.querySelector("#preset-type"), "random");
    dispatchValue(windowObject, documentObject.querySelector("#preset-count"), 12);
    dispatchValue(windowObject, documentObject.querySelector("#preset-seed"), 4242);
    dispatchValue(windowObject, documentObject.querySelector("#preset-minimum-spacing"), 0.01);
    documentObject.querySelector("#generate-preset-button").click();
    await waitFor(() => microphoneCount(documentObject) === 12, "seed random generation");
    const firstRandom = documentObject.querySelector("#microphone-list").textContent;
    documentObject.querySelector("#generate-preset-button").click();
    const repeatedRandom = documentObject.querySelector("#microphone-list").textContent;
    assertEqual(repeatedRandom, firstRandom, "same seed repeats the visible layout");

    documentObject.querySelector("#undo-button").click();
    assertEqual(microphoneCount(documentObject), 8, "preset replacement is undoable");
    documentObject.querySelector("#redo-button").click();
    assertEqual(microphoneCount(documentObject), 12, "preset replacement is redoable");

    documentObject.querySelector("#add-microphone-button").click();
    await waitFor(() => microphoneCount(documentObject) === 13, "manual microphone add");
    assertEqual(
      documentObject.querySelector("#microphone-id").value,
      "mic-013",
      "manual add selects a stable next ID",
    );
    dispatchValue(windowObject, documentObject.querySelector("#microphone-id"), "reference-channel");
    dispatchValue(windowObject, documentObject.querySelector("#microphone-x"), 0.01);
    dispatchValue(windowObject, documentObject.querySelector("#microphone-y"), -0.015);
    dispatchValue(windowObject, documentObject.querySelector("#microphone-z"), 0.002);
    dispatchValue(windowObject, documentObject.querySelector("#microphone-sensitivity"), -2.5);
    dispatchValue(windowObject, documentObject.querySelector("#microphone-phase"), 3.5);
    assertEqual(
      documentObject.querySelector("#microphone-id").value,
      "reference-channel",
      "manual ID edit",
    );

    const beforeNudge = selectedCoordinates(documentObject);
    const canvas = documentObject.querySelector("#array-canvas");
    canvas.focus();
    canvas.dispatchEvent(new windowObject.KeyboardEvent("keydown", {
      bubbles: true,
      cancelable: true,
      key: "ArrowRight",
    }));
    await nextPaint(windowObject);
    const afterNudge = selectedCoordinates(documentObject);
    assertNear(afterNudge[0], beforeNudge[0] + 0.005, 1e-9, "keyboard nudge uses snap step");
    assertNear(afterNudge[1], beforeNudge[1], 1e-9, "keyboard nudge keeps y");

    documentObject.querySelector("#add-tool-button").click();
    const canvasRect = canvas.getBoundingClientRect();
    canvas.dispatchEvent(new windowObject.PointerEvent("pointerdown", {
      bubbles: true,
      cancelable: true,
      pointerId: 31,
      pointerType: "mouse",
      isPrimary: true,
      button: 0,
      buttons: 1,
      clientX: canvasRect.left + canvasRect.width * 0.7,
      clientY: canvasRect.top + canvasRect.height * 0.35,
    }));
    await waitFor(() => microphoneCount(documentObject) === 14, "canvas microphone add");
    documentObject.querySelector("#select-tool-button").click();
    documentObject.querySelector("#remove-microphone-button").click();
    await waitFor(() => microphoneCount(documentObject) === 13, "manual delete");

    const firstButton = microphoneButtons(documentObject)[0];
    const secondButton = microphoneButtons(documentObject)[1];
    firstButton.click();
    const firstPosition = selectedCoordinates(documentObject);
    secondButton.click();
    dispatchValue(windowObject, documentObject.querySelector("#microphone-x"), firstPosition[0]);
    dispatchValue(windowObject, documentObject.querySelector("#microphone-y"), firstPosition[1]);
    dispatchValue(windowObject, documentObject.querySelector("#microphone-z"), firstPosition[2]);
    await waitFor(
      () => documentObject.documentElement.dataset.arrayValid === "false",
      "duplicate position rejection",
    );
    assert(documentObject.querySelector("#export-button").disabled, "invalid duplicate disables export");
    documentObject.querySelector("#undo-button").click();
    await waitFor(
      () => documentObject.documentElement.dataset.arrayValid === "true",
      "duplicate undo recovery",
    );

    documentObject.querySelector("#export-button").click();
    await waitFor(() => downloads.some((item) => item.fileName), "Array JSON export");
    const exportedDownload = downloads.find((item) => item.fileName);
    assert(
      exportedDownload.fileName.endsWith(".array.json"),
      "export uses .array.json filename",
    );
    const exported = JSON.parse(await exportedDownload.blob.text());
    assertEqual(exported.kind, "micarrsim.array", "standard array kind");
    assertEqual((await validateArrayDefinition(exported)).length, 0, "exported Array contract");
    assert(!Object.hasOwn(exported, "shape"), "editor shape is not exported");
    assert(!Object.hasOwn(exported, "preset"), "editor preset is not exported");
    assert(!Object.hasOwn(exported, "seed"), "editor seed is not exported");
    const calibrated = exported.microphones.find(
      (microphone) => microphone.id === "reference-channel",
    );
    assert(calibrated, "edited channel is exported");
    assertEqual(calibrated.sensitivityDb, -2.5, "sensitivity is preserved");
    assertEqual(calibrated.phaseOffsetDeg, 3.5, "phase is preserved");

    dispatchValue(windowObject, documentObject.querySelector("#array-name"), "Temporary name");
    const exportedFile = new windowObject.File(
      [JSON.stringify(exported)],
      "round-trip.array.json",
      { type: "application/json" },
    );
    dispatchFiles(windowObject, documentObject.querySelector("#array-input"), [exportedFile]);
    await waitFor(
      () => documentObject.querySelector("#array-name").value === exported.name,
      "Array round trip import",
    );
    microphoneButtons(documentObject).find(
      (button) => button.dataset.microphoneId === "reference-channel",
    ).click();
    assertEqual(
      Number(documentObject.querySelector("#microphone-sensitivity").value),
      -2.5,
      "import keeps sensitivity",
    );

    const countBeforeInvalidImport = microphoneCount(documentObject);
    const invalidFile = new windowObject.File(
      [JSON.stringify({ kind: "not-an-array" })],
      "invalid.json",
      { type: "application/json" },
    );
    dispatchFiles(windowObject, documentObject.querySelector("#array-input"), [invalidFile]);
    await waitFor(
      () => documentObject.querySelector("#validation-title").textContent.includes("적용하지 못"),
      "invalid import feedback",
    );
    assertEqual(
      microphoneCount(documentObject),
      countBeforeInvalidImport,
      "invalid import preserves current array",
    );

    frame.style.width = "390px";
    await waitFor(
      () => documentObject.querySelector("#array-builder-layout").dataset.splitPaneActive === "false",
      "compact Array Builder layout",
    );
    await nextPaint(windowObject);
    assert(
      documentObject.documentElement.scrollWidth <=
        documentObject.documentElement.clientWidth + 1,
      "Array Builder has no horizontal overflow at 390px",
    );
    assert(
      documentObject.querySelector("#array-canvas").getBoundingClientRect().height >= 350,
      "Array canvas remains usable at 390px",
    );
  } finally {
    windowObject.URL.createObjectURL = originalCreate;
    windowObject.URL.revokeObjectURL = originalRevoke;
    windowObject.HTMLAnchorElement.prototype.click = originalAnchorClick;
    frame.remove();
  }
});