import { ActorSheet5e } from "../sheets/base.js";

/**
 * An Actor sheet for NPC type characters in the SW5E system.
 * Extends the base ActorSheet5e class.
 * @type {ActorSheet5e}
 */
export class ActorSheet5eNPC extends ActorSheet5e {

  /**
   * Define default rendering options for the NPC sheet
   * @return {Object}
   */
	static get defaultOptions() {
	  return mergeObject(super.defaultOptions, {
      classes: ["sw5e", "sheet", "actor", "npc"],
      width: 600,
      height: 658
    });
  }

  /* -------------------------------------------- */
  /*  Rendering                                   */
  /* -------------------------------------------- */

  /**
   * Get the correct HTML template path to use for rendering this particular sheet
   * @type {String}
   */
  get template() {
    if ( !game.user.isGM && this.actor.limited ) return "systems/sw5e/templates/actors/limited-sheet.html";
    return "systems/sw5e/templates/actors/npc-sheet.html";
  }

  /* -------------------------------------------- */

  /**
   * Organize Owned Items for rendering the NPC sheet
   * @private
   */
  _prepareItems(data) {

    // Categorize Items as Features and Powers
    const features = {
      weapons: { label: "Attacks", items: [] , hasActions: true, dataset: {type: "weapon", "weapon-type": "natural"} },
      actions: { label: "Actions", items: [] , hasActions: true, dataset: {type: "feat", "activation.type": "action"} },
      passive: { label: "Features", items: [], dataset: {type: "feat"} },
      equipment: { label: "Inventory", items: [], dataset: {type: "loot"}}
    };

    // Start by classifying items into groups for rendering
    let [powers, other] = data.items.reduce((arr, item) => {
      item.img = item.img || DEFAULT_TOKEN;
      item.isStack = item.data.quantity ? item.data.quantity > 1 : false;
      item.hasUses = item.data.uses && (item.data.uses.max > 0);
      item.isOnCooldown = item.data.recharge && !!item.data.recharge.value && (item.data.recharge.charged === false);
      item.isDepleted = item.isOnCooldown && (item.data.uses.per && (item.data.uses.value > 0));
      item.hasTarget = !!item.data.target && !(["none",""].includes(item.data.target.type));
      if ( item.type === "power" ) arr[0].push(item);
      else arr[1].push(item);
      return arr;
    }, [[], []]);

    // Apply item filters
    powers = this._filterItems(powers, this._filters.powerbook);
    other = this._filterItems(other, this._filters.features);

    // Organize Powerbook
    const powerbook = this._preparePowerbook(data, powers);

    // Organize Features
    for ( let item of other ) {
      if ( item.type === "weapon" ) features.weapons.items.push(item);
      else if ( item.type === "feat" ) {
        if ( item.data.activation.type ) features.actions.items.push(item);
        else features.passive.items.push(item);
      }
      else features.equipment.items.push(item);
    }

    // Assign and return
    data.features = Object.values(features);
    data.powerbook = powerbook;
  }


  /* -------------------------------------------- */

  /**
   * Add some extra data when rendering the sheet to reduce the amount of logic required within the template.
   */
  getData() {
    const data = super.getData();

    // Challenge Rating
    const cr = parseFloat(data.data.details.cr || 0);
    const crLabels = {0: "0", 0.125: "1/8", 0.25: "1/4", 0.5: "1/2"};
    data.labels["cr"] = cr >= 1 ? String(cr) : crLabels[cr] || 1;
    return data;
  }

  /* -------------------------------------------- */
  /*  Object Updates                              */
  /* -------------------------------------------- */

  /**
   * This method is called upon form submission after form data is validated
   * @param event {Event}       The initial triggering submission event
   * @param formData {Object}   The object of validated form data with which to update the object
   * @private
   */
  _updateObject(event, formData) {

    // Format NPC Challenge Rating
    const crs = {"1/8": 0.125, "1/4": 0.25, "1/2": 0.5};
    let crv = "data.details.cr";
    let cr = formData[crv];
    cr = crs[cr] || parseFloat(cr);
    if ( cr ) formData[crv] = cr < 1 ? cr : parseInt(cr);

    // Parent ActorSheet update steps
    super._updateObject(event, formData);
  }

  /* -------------------------------------------- */
  /*  Event Listeners and Handlers                */
  /* -------------------------------------------- */

  /**
   * Activate event listeners using the prepared sheet HTML
   * @param html {HTML}   The prepared HTML object ready to be rendered into the DOM
   */
	activateListeners(html) {
    super.activateListeners(html);

    // Rollable Health Formula
    html.find(".health .rollable").click(this._onRollHealthFormula.bind(this));
  }

  /* -------------------------------------------- */

  /**
   * Handle rolling NPC health values using the provided formula
   * @param {Event} event     The original click event
   * @private
   */
  _onRollHealthFormula(event) {
    event.preventDefault();
    const formula = this.actor.data.data.attributes.hp.formula;
    if ( !formula ) return;
    const hp = new Roll(formula).roll().total;
    AudioHelper.play({src: CONFIG.sounds.dice});
    this.actor.update({"data.attributes.hp.value": hp, "data.attributes.hp.max": hp});
  }
}