const sizes = [
  "XXS",
  "XS",
  "S",
  "M",
  "L",
  "XL",
  "2XL",
  "3XL",
  "4XL",
  "5XL",
  "6XL",
];

function selectCell(e) {
  const cell = e.target;
  const value = parseFloat(cell.dataset.val);
  const col = cell.dataset.col;
  const dimension = cell.dataset.dim;

  document.querySelectorAll("td.val:not(.empty)").forEach((match) => {
    match.dataset.diff = "";
    match.classList.remove("highlighted");
    match.classList.remove("currentDimension");
    if (match.dataset.dim === dimension) {
      match.classList.add("currentDimension");
      const diff = parseFloat(match.dataset.val) - value;
      match.dataset.diff = diff > 0 ? `+${diff}` : diff;
      if (match.dataset.dim === "A")
        match.style.cssText = `--custom-color: rgba(96, 165, 249, ${1 - Math.abs(diff) / 5})`;
      if (match.dataset.dim === "B")
        match.style.cssText = `--custom-color: rgba(211, 129, 247, ${1 - Math.abs(diff) / 5})`;
      if (match.dataset.dim === "C")
        match.style.cssText = `--custom-color: rgba(255, 121, 117, ${1 - Math.abs(diff) / 5})`;
    }
  });
  document.querySelectorAll("td.dimension").forEach((match) => {
    match.classList.remove("currentDimension");
    if (match.innerHTML === dimension) {
      match.classList.add("currentDimension");
    }
  });

  cell.classList.add("highlighted");
}

function selectCellPlus(e) {
  e.stopPropagation();
  const cell = e.target;
  const group = cell.parentElement.parentElement;
  const col = cell.dataset.col;

  if (
    cell.classList.contains("highlighted") &&
    !cell.classList.contains("currentDimension")
  ) {
    selectCell(e);
    return;
  }

  const values = {};
  group.querySelectorAll(`td[data-col='${col}']`).forEach((match) => {
    values[match.dataset.dim] = parseFloat(match.dataset.val);
  });

  document.querySelectorAll("td.val:not(.empty)").forEach((match) => {
    match.dataset.diff = "";
    match.classList.remove("highlighted");
    match.classList.remove("currentDimension");
    if (match.dataset.dim in values) {
      const diff = parseFloat(match.dataset.val) - values[match.dataset.dim];
      match.dataset.diff = diff > 0 ? `+${diff}` : diff;
      if (match.dataset.dim === "A")
        match.style.cssText = `--custom-color: rgba(96, 165, 249, ${1 - Math.abs(diff) / 5})`;
      if (match.dataset.dim === "B")
        match.style.cssText = `--custom-color: rgba(211, 129, 247, ${1 - Math.abs(diff) / 5})`;
      if (match.dataset.dim === "C")
        match.style.cssText = `--custom-color: rgba(255, 121, 117, ${1 - Math.abs(diff) / 5})`;
    }
  });
  document.querySelectorAll("td.dimension").forEach((match) => {
    match.classList.remove("currentDimension");
  });

  group.querySelectorAll(`td[data-col='${col}']`).forEach((match) => {
    match.classList.add("highlighted");
  });
}

function hoverCell(e) {
  const cell = e.target;
  const group = cell.parentElement.parentElement;
  const col = cell.dataset.col;
  const dim = cell.dataset.dim;

  hoverOff();
  document.querySelectorAll("table > thead > tr > th").forEach((match) => {
    if (match.dataset.col === col) match.classList.add("hover");
  });
  group.querySelectorAll("td.dimension").forEach((match) => {
    if (match.innerText === dim) match.classList.add("hover");
  });
  group.querySelectorAll("td:not(.dimension), th").forEach((match) => {
    match.classList.add("hover");
  });
}

function hoverOff() {
  document.querySelectorAll("table > thead > tr > th").forEach((match) => {
    match.classList.remove("hover");
  });
  document.querySelectorAll("td.dimension, td, th").forEach((match) => {
    match.classList.remove("hover");
  });
}

const typeList = new Set();
const fitList = new Set();

document.querySelectorAll("tbody").forEach((tbody) => {
  if (tbody.dataset.from) {
    const source = document.querySelector(`tbody#${tbody.dataset.from}`);
    if (!source) {
      console.log(`tbody with ID '${tbody.dataset.from}' not found.`);
      return;
    }

    const name = tbody.querySelector("tr th").innerHTML;
    tbody.replaceChildren();
    tbody.insertAdjacentHTML("afterbegin", source.innerHTML);
    tbody.querySelector("tr th").innerHTML = name;
    delete tbody.dataset.from;
    tbody.dataset.type = source.dataset.type;
    tbody.dataset.fit = source.dataset.fit;
  }

  typeList.add(tbody.dataset.type);
  fitList.add(tbody.dataset.fit);
});

// build filter
const filterTypeElement = document.querySelector("#filterType");
typeList.forEach((type) => {
  filterTypeElement.insertAdjacentHTML(
    "beforeend",
    `<label>
                <input type="checkbox" value="${type}" checked>
                ${type}
            </label>`,
  );
});
const filterFitElement = document.querySelector("#filterFit");
fitList.forEach((fit) => {
  filterFitElement.insertAdjacentHTML(
    "beforeend",
    `<label>
                <input type="checkbox" value="${fit}" checked>
                ${fit}
            </label>`,
  );
});

const filterType = new Set(typeList);
const filterFit = new Set(fitList);

function filter() {
  document.querySelectorAll(`tbody`).forEach((match) => {
    match.classList.toggle(
      "filtered",
      !filterType.has(match.dataset.type) || !filterFit.has(match.dataset.fit),
    );
  });
}

filterTypeElement
  .querySelectorAll('input[type="checkbox"]')
  .forEach((checkbox) => {
    checkbox.addEventListener("change", (e) => {
      if (checkbox.checked) {
        filterType.add(checkbox.value);
      } else {
        filterType.delete(checkbox.value);
      }
      filter();
    });
  });

filterFitElement
  .querySelectorAll('input[type="checkbox"]')
  .forEach((checkbox) => {
    checkbox.addEventListener("change", (e) => {
      if (checkbox.checked) {
        filterFit.add(checkbox.value);
      } else {
        filterFit.delete(checkbox.value);
      }

      filter();
    });
  });

document.querySelectorAll("td.val").forEach((cell) => {
  const rowTitle = cell.parentElement.querySelector("th");
  cell.dataset.col =
    sizes[rowTitle !== null ? cell.cellIndex - 4 : cell.cellIndex - 1];
  cell.addEventListener("pointerenter", hoverCell);
  cell.addEventListener("pointerleave", hoverOff);
});

// initialize table
document.querySelectorAll("td.val:not(.empty)").forEach((cell) => {
  cell.dataset.val = cell.innerText;
  cell.dataset.diff = "";
  cell.dataset.dim = cell.parentElement.querySelector("td.dimension").innerHTML;

  cell.addEventListener("click", selectCellPlus);
});

// disable select on click outside value cell
document.addEventListener("click", (e) => {
  document.querySelectorAll("td.val:not(.empty)").forEach((match) => {
    match.dataset.diff = "";
    match.classList.remove("highlighted");
    match.classList.remove("currentDimension");
  });
  document.querySelectorAll("td.dimension").forEach((match) => {
    match.classList.remove("currentDimension");
  });
});