if (document.location.search.includes("dark-theme=true")) {
  document.body.classList.add("dark-theme");
}

const textToImage = async (text) => {
  const inferenceResponse = await fetch(`infer_biggan?input=${text}`);
  const inferenceBlob = await inferenceResponse.blob();

  return URL.createObjectURL(inferenceBlob);
};

const translateText = async (text) => {
  const inferResponse = await fetch(`infer_t5?input=${text}`);
  const inferJson = await inferResponse.json();

  return inferJson.output;
};

const queryDataset = async (start, end) => {
  const queryResponse = await fetch(`query_emotion?start=${start}&end=${end}`);
  const queryJson = await queryResponse.json();

  return queryJson.output;
};

const updateTable = async (cursor, range = 5) => {
  const table = document.querySelector(".dataset-output");

  const fragment = new DocumentFragment();

  const observations = await queryDataset(cursor, cursor + range);

  for (const observation of observations) {
    let row = document.createElement("tr");
    let text = document.createElement("td");
    let emotion = document.createElement("td");

    text.textContent = observation.text;
    emotion.textContent = observation.emotion;

    row.appendChild(text);
    row.appendChild(emotion);
    fragment.appendChild(row);
  }

  table.innerHTML = "";

  table.appendChild(fragment);

  table.insertAdjacentHTML(
    "afterbegin",
    `<thead>
      <tr>
        <td>text</td>
        <td>emotion</td>
      </tr>
    </thead>`
  );
};

const imageGenSelect = document.getElementById("image-gen-input");
const imageGenImage = document.querySelector(".image-gen-output");
const textGenForm = document.querySelector(".text-gen-form");
const tableButtonPrev = document.querySelector(".table-previous");
const tableButtonNext = document.querySelector(".table-next");

let cursor = 0;
const RANGE = 5;
const LIMIT = 16_000;

imageGenSelect.addEventListener("change", async (event) => {
  const value = event.target.value;

  try {
    imageGenImage.src = await textToImage(value);
  } catch (err) {
    console.error(err);
  }
});

textGenForm.addEventListener("submit", async (event) => {
  event.preventDefault();

  const textGenInput = document.getElementById("text-gen-input");
  const textGenParagraph = document.querySelector(".text-gen-output");

  try {
    textGenParagraph.textContent = await translateText(textGenInput.value);
  } catch (err) {
    console.error(err);
  }
});

tableButtonPrev.addEventListener("click", () => {
  cursor = cursor > RANGE ? cursor - RANGE : 0;

  if (cursor < RANGE) {
    tableButtonPrev.classList.add("hidden");
  }
  if (cursor < LIMIT - RANGE) {
    tableButtonNext.classList.remove("hidden");
  }

  updateTable(cursor);
});

tableButtonNext.addEventListener("click", () => {
  cursor = cursor < LIMIT - RANGE ? cursor + RANGE : cursor;

  if (cursor >= RANGE) {
    tableButtonPrev.classList.remove("hidden");
  }
  if (cursor >= LIMIT - RANGE) {
    tableButtonNext.classList.add("hidden");
  }

  updateTable(cursor);
});

textToImage(imageGenSelect.value)
  .then((image) => (imageGenImage.src = image))
  .catch(console.error);

updateTable(cursor)
  .then((image) => (imageGenImage.src = image))
  .catch(console.error);