let items = {};

document.onreadystatechange = function() {
  if (document.readyState === 'interactive') {
    document.getElementById('search').oninput = search;
    const checkbox = document.getElementById('showhidden')
    checkbox.oninput = showhidden;
    fetch('/api/items').then((response) => response.json()).then((data) => {
      items = data;
      renderItems();
      showhidden({target: checkbox});
    });
  }
}

function renderItems() {
  const container = document.getElementById('results');
  const template = document.getElementById('item');
  const loading = document.getElementById('loading');

  for (const [id, item] of Object.entries(items)) {
    const clone = template.content.cloneNode(true);
    const [loc, longloc] = getLocString(items, item);
    clone.querySelector(".loc").textContent = loc;
    clone.querySelector(".loc").title = longloc;
    clone.querySelector(".type").textContent = item.type;
    clone.querySelector(".id").textContent = item.id;
    clone.querySelector(".name").textContent = item.name;
    clone.querySelector(".content").textContent = item.content;
    clone.querySelector(".note").textContent = item.note;
    clone.querySelector(".result").id = id;
    clone.querySelector("a").href = `form.html?id=${id}`;
    if (item.hidden) {
      clone.querySelector(".result").classList.add('hidden')
    };
    container.appendChild(clone);
  };
  loading.remove();
}

function getLocString(items, item) {
  if (item.is_in == item.id) {
    return ['in ↻', `${item.id} is in itself`];
  }
  let ancestors = [];
  let next = item;
  while (next) {
    ancestors.unshift(next);
    next = items[next.is_in];
  }
  ancestors.pop();
  const loc = ancestors.map(i => i.id).join(' ➜ ') || '⬚';
  let longloc = ancestors.map(i => `${i.type || ''} ${i.id} ${i.name && `(${i.name})` || ''}`).join(' ➜ ') || 'universe';
  return [loc, `${item.id} is in ${longloc}`];
}

function search(e) {
  const searchAttrs = ['id', 'name', 'type', 'note', 'content'];
  const query = e.target.value;
  const regex = new RegExp(query, 'i')

  for (const elem of document.getElementsByClassName('result')) {
    const item = items[elem.id];
    let found = false;
    if (query) {
      for (const a in searchAttrs) {
        const attr = item[searchAttrs[a]];
        if (attr && attr.match(regex)) {
          found = true;
          break;
        }
      }
    } else {
      found = true;
    }

    if (found) {
      elem.classList.remove('filtered');
    } else {
      elem.classList.add('filtered');
    }
  }
}

function showhidden(e){
  const container = document.getElementById('results');
  if (e.target.checked) {
    results.classList.add('showhidden');
  } else {
    results.classList.remove('showhidden');
  }
}