const MAX_COUNTDOWN = 60;

var countdown = MAX_COUNTDOWN;
var now = Date.now();
var eventsOnNow = [];
var eventsOnNext = [];

grist.ready({
    requiredAccess: 'read table'
  });

grist.onRecords(function (records) {
  eventsOnNow = [];
  eventsOnNext = [];
  now = Date.now() + (60 + 50) * 60 * 1000;

  var i = 0;

  for (const r of records) {
    let e = new Event(
      i++,
      r["title"],
      r["venue"],
      r["video_privacy"],
      r["Record_override"],
      r["Comments"],
      Date.parse(r["start_date"]),
      Date.parse(r["end_date"])
    );

    if (e.hasStarted()  && !e.hasEnded()) {
      eventsOnNow.push(e);
    } else if (!e.hasStarted() && !e.hasEnded()) {
      eventsOnNext.push(e);
    }
  }

  eventsOnNow.sort((e1, e2) => {
    return (e1.timeUntilEnd() > e2.timeUntilEnd()) ? 1 : ((e2.timeUntilEnd() > e1.timeUntilEnd()) ? -1 : 0)
  });

  eventsOnNext.sort((e1, e2) => {
    return (e1.timeUntilStart() > e2.timeUntilStart()) ? 1 : ((e2.timeUntilStart() > e1.timeUntilStart()) ? -1 : 0)
  });

  populateList("happeningNow", eventsOnNow, false);
  populateList("happeningNext", eventsOnNext, true);

  window.setInterval(() => handleCountdown(), 1000);
});


grist.onOptions(function(options, interaction) {
  console.info("Options reloaded");
});

class Event {
  constructor(id, name, venue, privacy, recordOverride, comments, startTime, endTime) {
    this.id = id;
    this.name = name;
    this.venue = venue;
    this.privacy = privacy;
    this.recordOverride = recordOverride;
    this.comments = comments;
    this.startTime = startTime;
    this.endTime = endTime;
  }

  hasStarted() {
    return this.startTime < now;
  }

  hasEnded() {
    return this.endTime < now;
  }

  timeUntilStart() {
    return new Date(this.startTime - now);
  }

  timeUntilEnd() {
    return new Date(this.endTime - now);
  }
}

function makeTextBold(text) {
  return "<b>" + text + "</b>";
}

function convertTimeToString(time) {
  // Using getHours() is bullshit for this usage, it won't include any days in the hours
  let hours = Math.floor(time / (1000 * 60 * 60));
  let minutes = Math.ceil((time - (hours * 60 * 60 * 1000)) / (1000 * 60));

  return hours + " hours, " + minutes + " minutes";
}

function populateList(elementName, items, getStartsIn) {
  document.getElementById(elementName).innerHTML = "";

  for (const i of items) {
    var listItem = document.createElement("li");

    listItem.setAttribute("class", "list-group-item shadow-sm d-flex flex-wrap align-items-center m-2 rounded-3")
    listItem.setAttribute("id", i.id);

    // Basic info of event name, venue and time
    var title = document.createElement("h4");
    title.setAttribute("class", "me-auto")
    title.innerHTML = i.name;

    var venue = document.createElement("small");
    venue.setAttribute("class", "text-body-secondary");
    venue.innerHTML = " " + i.venue + " | ";

    var time = document.createElement("small");
    time.setAttribute("id", i.id + "_time");
    time.setAttribute("class", "text-body-secondary");
    if (getStartsIn) {
      time.innerHTML = convertTimeToString(i.timeUntilStart());
    } else {
      time.innerHTML = "(ends in) " + convertTimeToString(i.timeUntilEnd());
    }

    // Red border if show starts in 15 minutes
    if (getStartsIn) {
      if (i.timeUntilStart() <= 15 * 60 * 1000){
        listItem.setAttribute("class", listItem.getAttribute("class") + " border-2 border-danger");
        time.setAttribute("class", "text-danger");
      }
    }

    title.appendChild(venue);
    title.appendChild(time);
    listItem.appendChild(title);

    // Badges
    var privacyBadge = document.createElement("span");

    if (i.privacy == "none") {
      privacyBadge.innerHTML = "Do not record"
      privacyBadge.setAttribute("class", "badge text-bg-danger rounded-pill")
    } else if (i.privacy == "review") {
      privacyBadge.innerHTML = "Review"
      privacyBadge.setAttribute("class", "badge text-bg-warning rounded-pill")
    } else {
      privacyBadge.innerHTML = "Record";
      privacyBadge.setAttribute("class", "badge text-bg-success rounded-pill")
    }

    listItem.appendChild(privacyBadge);

    if (i.recordOverride) {
      var recordOverrideBadge = document.createElement("span");
      recordOverrideBadge.innerHTML = "Record override";
      recordOverrideBadge.setAttribute("class", "badge text-bg-primary rounded-pill border border-danger")
      listItem.appendChild(recordOverrideBadge);
    }

    if (i.comments) {
      var commentsBadge = document.createElement("span");
      commentsBadge.innerHTML = i.comments
      commentsBadge.setAttribute("class", "badge text-bg-info rounded-pill")
      listItem.appendChild(commentsBadge);
    }

    document.getElementById(elementName).appendChild(listItem);
  }
}

function refreshLists() {
  // Clear anything that's finished
  while (eventsOnNow.length >0 && eventsOnNow.at(0).hasEnded()) {
    eventsOnNow.shift();
  }

  // Get anything that's started and add it to the "Happening now" list
  while (eventsOnNext.length > 0 && eventsOnNext.at(0).hasStarted()) {
    eventsOnNow.push(eventsOnNext.shift());
  }
}

function handleCountdown() {
  countdown--;
  if (countdown == 0) {
    countdown = MAX_COUNTDOWN;

    refreshLists();
    populateList("happeningNow", eventsOnNow, false);
    populateList("happeningNext", eventsOnNext, true);
  }

  let counterElement = document.getElementById("counter");
  counterElement.innerHTML = "Next refresh in " + countdown;
}