/*jshint esversion: 9 */
class GoogleTimersCard extends HTMLElement {
  set hass(hass) {
    const entityId = this.config.entity;
    const alarms_entityId = this.config.alarms_entity;
    const state = hass.states[entityId];
    const state_alarms = hass.states[alarms_entityId];

    if (state === undefined) {
      this.innerHTML = `
        <ha-card>
          <div style="display: block; color: black; background-color: #fce588; padding: 8px;">
            Entity not found: ${entityId}
          </div>
        </ha-card>
      `;
      return;
    }

    if (!this.content) {
      const card = document.createElement('ha-card');
      this.content = document.createElement('div');
      const style = document.createElement('style');
      style.textContent = `
        ha-card {
          height: 100%;
          display: flex;
          flex-direction: column;
          justify-content: space-between;
          cursor: pointer;
          outline: none;
        }
        .header {
          display: flex;
          padding: 8px 16px 0;
          justify-content: space-between;
        }
        .no-header {
          padding: 16px 16px 0;
        }
        .name {
          color: var(--secondary-text-color);
          line-height: 40px;
          font-weight: 500;
          font-size: 16px;
          overflow: hidden;
          white-space: nowrap;
          text-overflow: ellipsis;
        }
        .icon {
          color: var(--state-icon-color, #44739e);
          line-height: 40px;
        }
        .info {
          display: flex;
          padding: 0px 16px 16px;
          overflow: hidden;
          margin-top: -4px;
          white-space: nowrap;
          text-overflow: ellipsis;
          line-height: 28px;
        }
        .value {
          font-size: 28px;
          margin-right: 4px;
        }
        .timer {
          font-size: 20px;
          margin: 8px 4px -5px;
        }
        .alarm {
          font-size: 20px;
          margin: 8px 4px -5px;
          text-transform: capitalize;
        }
        .title {
          color: var(--secondary-text-color);
          font-size: 1.2em;
          padding: 0 5px 0 5px;
          text-transform: capitalize;
          font-weight: 500;
        }
        .duration {
          font-size: 0.7em;
          padding: 0 5px 0 5px;
        }
        .next {
          font-size: 0.7em;
          padding: 0 5px 15px 5px;
          text-transform: lowercase;
          overflow: hidden;
          white-space: wrap;
          text-overflow: ellipsis;
        }
        `;
      card.appendChild(style);
      card.appendChild(this.content);
      this.appendChild(card);
    }

    const STATE_UNKNOWN = "unknown"
    const STATE_UNAVAILABLE = "unavailable"
    const DEFAULT_ICON = "mdi:timer-sand"

    // STRINGS
    const NO_TIMERS = "None set";
    const TIMER_IS_DONE = "TIMER DONE!";

    // JSON attributes
    const JSON_TIMERS = "timers"
    const JSON_ALARMS = "alarms"
    const JSON_RECURRENCE = "recurrence"
    const JSON_DURATION = "duration";
    const JSON_LOCAL_TIME = "local_time"
    const JSON_LOCAL_TIME_ISO = "local_time_iso";
    const JSON_FIRE_TIME = "fire_time"
    const JSON_NAME = "label";

    // ICONS
    const ICON_ALARM = "mdi:alarm";
    const ICON_TIMER = "mdi:timer"
    const ICON_ALARM_DONE = "mdi:bell-ring";
    const ICON_DURATION = "mdi:timelapse";
    const ICON_ALARM_TIME = "mdi:clock";
    const ICON_LABEL = "mdi:label-variant"
    const ICON_NEXT = "mdi:calendar-week"

    // TIME
    const STRING_HOURS = " h. "
    const STRING_MINUTES = " mins. "
    const STRING_SECONDS = " secs."
    var WEEKDAYS = { 1 : "mon.",
                 2 : "tue.",
                 3 : "wed.",
                 4 : "thu.",
                 5 : "fri.",
                 6 : "sat.",
                 0 : "sun."
               };

    // Get's timedelta between now and fire_time
    function get_timedelta(ts) {
        return new Date((ts * 1000) - Date.now());
    }

    // Format the timestring to match 1 h. 11 mins. 11 secs. .
    function format_to_human_readable(rt) {
        var h = rt.getUTCHours() > 0 ? rt.getUTCHours() + STRING_HOURS : ""
        var m = rt.getUTCMinutes() < 10  && rt.getUTCHours() > 1 ? "0"+ rt.getUTCMinutes() : rt.getUTCMinutes();
        var s = rt.getUTCSeconds() < 10 ? "0"+ rt.getUTCSeconds() : rt.getUTCSeconds();
        var ts = h + m + STRING_MINUTES + s + STRING_SECONDS;
        return ts;
    }

    function format_alarm_time(ts, is_ampm) {
        var d = new Date(ts * 1000)
        // var time = (d.toLocaleString(window.navigator.language, {weekday: 'long'})) + ': ' + d.getHours() + ':' + (d.getMinutes()<10?'0':'') + d.getMinutes()
        var time = d.toLocaleString(window.navigator.language, {weekday: 'long', hour: '2-digit', minute: '2-digit', hour12: is_ampm })
        return time
    }

    const name = this.config.title || state.attributes['friendly_name'];
    const icon = this.config.icon || DEFAULT_ICON
    
    var timers = [];
    var alarms = [];
    var html = ``

    if (state.state != STATE_UNKNOWN) {
        timers = state.attributes[JSON_TIMERS];
        if (this.config.alarms_entity && state_alarms.state != STATE_UNKNOWN) {
            alarms = state_alarms.attributes[JSON_ALARMS];
        }
    }

    if (!this.config.hide_header) {
        // Header with name and icon
        html = `
        <div class="header">
          <div class="name">${name}</div>
          <div class="icon"><ha-icon style="--mdc-icon-size: 24px;" icon="${icon}"></ha-icon></div>
        </div>
        `;
    }
    else {
        html = `
        <div class="no-header"></div>
        `;
    }

    // Checks if there is a timer set, and the loops through the sensor. Or else it shows a message.
    if (state.state != STATE_UNAVAILABLE || state_alarms.state != STATE_UNAVAILABLE) {

      for (const alarm of alarms) {
        var alarm_name = ""
        var alarm_icon = ICON_ALARM
        var alarm_next_icon = '<ha-icon style="padding: 0 3px 0 0; --mdc-icon-size: 1.1em;" icon="'+ ICON_NEXT +'"></ha-icon>'
        var alarm_next = ""

        var formatted_time = format_alarm_time(alarm[JSON_FIRE_TIME], this.config.use_12hour)
        var recurrence = ""

        if (alarm[JSON_RECURRENCE] != null && alarm[JSON_RECURRENCE].length >= 7) {
            recurrence = "all weekdays"
            alarm_next = alarm_next_icon
        } else if (alarm[JSON_RECURRENCE] != null) {
            alarm[JSON_RECURRENCE].forEach(function(entry) {
                recurrence += WEEKDAYS[entry] + " "
            });
            alarm_next = alarm_next_icon
        }

        // If a label is set then it displays it else it shows nothing.
        if (alarm[JSON_NAME]) {
          alarm_name = "<div style='margin: 0 15px 0 15px;'><span class='title'><ha-icon style='padding: 0 3px 0 0; --mdc-icon-size: 1.1em;' icon='" + ICON_LABEL + "'></ha-icon>" + alarm[JSON_NAME] + "</span></div>"
        }

        html += `
        <div>
          ${alarm_name}
          <div class="info" style="margin: -5px 0 -5px;">
            <div class="icon"><ha-icon style="padding: 0 5px 0 0; --mdc-icon-size: 24px;" icon="${alarm_icon}"></ha-icon></div>
            <div class="alarm">${formatted_time}<span class="next">${alarm_next}${recurrence}</span></div>
          </div>
        </div>
        `;
      }

      for (const timer of timers) {
        if (timer[JSON_DURATION] === undefined) {
          continue;
        }

        var timer_name = ""
        var alarm_time = ""
        var timer_icon = ICON_TIMER

        var remaining_time = get_timedelta(timer[JSON_FIRE_TIME])
        var formatted_time = format_to_human_readable(remaining_time)

        if (Math.sign(remaining_time) == -1) {
          formatted_time = TIMER_IS_DONE
          timer_icon = ICON_ALARM_DONE
        }

        // If show_fire_time is true then it displays the time when the alarm will fire.
        if (this.config.show_fire_time) {
          alarm_time = "<span class='duration'><ha-icon style='padding: 0 3px 0 0; --mdc-icon-size: 1.1em;' icon='" + ICON_ALARM_TIME + "'></ha-icon>" + timer[JSON_LOCAL_TIME].split(" ")[1] + "</span>"
        }

        // If a label is set then it displays it else it shows nothing.
        if (timer[JSON_NAME]) {
          timer_name = "<div style='margin: 0 15px 0 15px;'><span class='title'><ha-icon style='padding: 0 3px 0 0; --mdc-icon-size: 1.1em;' icon='" + ICON_LABEL + "'></ha-icon>" + timer[JSON_NAME] + "</span></div>"
        }

        html += `
        <div>
          ${timer_name}
          <div class="info" style="margin: -5px 0 -5px;">
            <div class="icon"><ha-icon style="padding: 0 5px 0 0; --mdc-icon-size: 24px;" icon="${timer_icon}"></ha-icon></div>
            <div class="timer">${formatted_time}<span class="duration"><ha-icon style="padding: 0 3px 0 0; --mdc-icon-size: 1.1em;" icon="${ICON_DURATION}"></ha-icon>${timer[JSON_DURATION]}</span>${alarm_time}</div>
          </div>
        </div>
        `;
      }

    } else {
      html += `
      <div class="info">
        <span class="value">${NO_TIMERS}</span>
      </div>
      `;
    }

    this.content.innerHTML = html;
  }

  setConfig(config) {
    if (!config.entity) {
      throw new Error('You need to define an entity');
    }
    this.config = config;
  }

  getCardSize() {
    return 2
  }
}
customElements.define('googletimers-card', GoogleTimersCard);

window.customCards = window.customCards || [];
window.customCards.push({
  type: 'googletimers-card',
  name: 'Google Timers Card',
  preview: false,
  description: 'The Google Home timers card shows timers and alarms set in Google Home.'
});