import TraitSelector from "../apps/trait-selector.js";

/**
 * Override and extend the core ItemSheet implementation to handle specific item types
 * @extends {ItemSheet}
 */
export default class ItemSheet5e extends ItemSheet {
  constructor(...args) {
    super(...args);
    if ( this.object.data.type === "class" ) {
      this.options.resizable = true;
      this.options.width =  600;
      this.options.height = 640;
    }
  }

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

  /** @override */
	static get defaultOptions() {
	  return mergeObject(super.defaultOptions, {
      width: 560,
      height: 420,
      classes: ["sw5e", "sheet", "item"],
      resizable: true,
      scrollY: [".tab.details"],
      tabs: [{navSelector: ".tabs", contentSelector: ".sheet-body", initial: "description"}]
    });
  }

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

  /** @override */
  get template() {
    const path = "systems/sw5e/templates/items/";
    return `${path}/${this.item.data.type}.html`;
  }

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

  /** @override */
  getData() {
    const data = super.getData();
    data.labels = this.item.labels;

    // Include CONFIG values
    data.config = CONFIG.SW5E;

    // Item Type, Status, and Details
    data.itemType = data.item.type.titleCase();
    data.itemStatus = this._getItemStatus(data.item);
    data.itemProperties = this._getItemProperties(data.item);
    data.isPhysical = data.item.data.hasOwnProperty("quantity");

    // Potential consumption targets
    data.abilityConsumptionTargets = this._getItemConsumptionTargets(data.item);

    // Action Details
    data.hasAttackRoll = this.item.hasAttack;
    data.isHealing = data.item.data.actionType === "heal";
    data.isFlatDC = getProperty(data.item.data, "save.scaling") === "flat";

    // Vehicles
    data.isCrewed = data.item.data.activation?.type === 'crew';
    data.isMountable = this._isItemMountable(data.item);
    return data;
  }

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

    /**
   * Get the valid item consumption targets which exist on the actor
   * @param {Object} item         Item data for the item being displayed
   * @return {{string: string}}   An object of potential consumption targets
   * @private
   */
  _getItemConsumptionTargets(item) {
    const consume = item.data.consume || {};
    if ( !consume.type ) return [];
    const actor = this.item.actor;
    if ( !actor ) return {};

    // Ammunition
    if ( consume.type === "ammo" ) {
      return actor.itemTypes.consumable.reduce((ammo, i) =>  {
        if ( i.data.data.consumableType === "ammo" ) {
          ammo[i.id] = `${i.name} (${i.data.data.quantity})`;
        }
        return ammo;
      }, {});
    }

    // Attributes
    else if ( consume.type === "attribute" ) {
      const attributes = Object.values(CombatTrackerConfig.prototype.getAttributeChoices())[0]; // Bit of a hack
      return attributes.reduce((obj, a) => {
        obj[a] = a;
        return obj;
      }, {});
    }

    // Materials
    else if ( consume.type === "material" ) {
      return actor.items.reduce((obj, i) => {
        if ( ["consumable", "loot"].includes(i.data.type) && !i.data.data.activation ) {
          obj[i.id] = `${i.name} (${i.data.data.quantity})`;
        }
        return obj;
      }, {});
    }

    // Charges
    else if ( consume.type === "charges" ) {
      return actor.items.reduce((obj, i) => {
        const uses = i.data.data.uses || {};
        if ( uses.per && uses.max ) {
          const label = uses.per === "charges" ?
            ` (${game.i18n.format("SW5E.AbilityUseChargesLabel", {value: uses.value})})` :
            ` (${game.i18n.format("SW5E.AbilityUseConsumableLabel", {max: uses.max, per: uses.per})})`;
          obj[i.id] = i.name + label;
        }
        return obj;
      }, {})
    }
    else return {};
  }

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

  /**
   * Get the text item status which is shown beneath the Item type in the top-right corner of the sheet
   * @return {string}
   * @private
   */
  _getItemStatus(item) {
    if ( item.type === "power" ) {
      return CONFIG.SW5E.powerPreparationModes[item.data.preparation];
    }
    else if ( ["weapon", "equipment"].includes(item.type) ) {
      return game.i18n.localize(item.data.equipped ? "SW5E.Equipped" : "SW5E.Unequipped");
    }
    else if ( item.type === "tool" ) {
      return game.i18n.localize(item.data.proficient ? "SW5E.Proficient" : "SW5E.NotProficient");
    }
  }

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

  /**
   * Get the Array of item properties which are used in the small sidebar of the description tab
   * @return {Array}
   * @private
   */
  _getItemProperties(item) {
    const props = [];
    const labels = this.item.labels;

    if ( item.type === "weapon" ) {
      props.push(...Object.entries(item.data.properties)
        .filter(e => e[1] === true)
        .map(e => CONFIG.SW5E.weaponProperties[e[0]]));
    }

    else if ( item.type === "power" ) {
      props.push(
        labels.components,
        labels.materials,
        item.data.components.concentration ? game.i18n.localize("SW5E.Concentration") : null,
        item.data.components.ritual ? game.i18n.localize("SW5E.Ritual") : null
      )
    }

    else if ( item.type === "equipment" ) {
      props.push(CONFIG.SW5E.equipmentTypes[item.data.armor.type]);
      props.push(labels.armor);
    }

    else if ( item.type === "feat" ) {
      props.push(labels.featType);
    }
	
    else if ( item.type === "species" ) {

    }

    // Action type
    if ( item.data.actionType ) {
      props.push(CONFIG.SW5E.itemActionTypes[item.data.actionType]);
    }

    // Action usage
    if ( (item.type !== "weapon") && item.data.activation && !isObjectEmpty(item.data.activation) ) {
      props.push(
        labels.activation,
        labels.range,
        labels.target,
        labels.duration
      )
    }
    return props.filter(p => !!p);
  }

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

  /**
   * Is this item a separate large object like a siege engine or vehicle
   * component that is usually mounted on fixtures rather than equipped, and
   * has its own AC and HP.
   * @param item
   * @returns {boolean}
   * @private
   */
  _isItemMountable(item) {
    const data = item.data;
    return (item.type === 'weapon' && data.weaponType === 'siege')
      || (item.type === 'equipment' && data.armor.type === 'vehicle');
  }

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

  /** @override */
  setPosition(position={}) {
    position.height = this._tabs[0].active === "details" ? "auto" : this.options.height;
    return super.setPosition(position);
  }

  /* -------------------------------------------- */
  /*  Form Submission                             */
	/* -------------------------------------------- */

  /** @override */
  _updateObject(event, formData) {

    // TODO: This can be removed once 0.7.x is release channel
    if ( !formData.data ) formData = expandObject(formData);

    // Handle Damage Array
    const damage = formData.data?.damage;
    if ( damage ) damage.parts = Object.values(damage?.parts || {}).map(d => [d[0] || "", d[1] || ""]);

    // Update the Item
    super._updateObject(event, formData);
  }

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

  /** @override */
  activateListeners(html) {
    super.activateListeners(html);
    html.find(".damage-control").click(this._onDamageControl.bind(this));
    html.find('.trait-selector.class-skills').click(this._onConfigureClassSkills.bind(this));
    
    // Armor properties
    html.find(".armorproperties-control").click(this._onarmorpropertiesControl.bind(this));
    
    // Weapon properties
    html.find(".weaponproperties-control").click(this._onweaponpropertiesControl.bind(this));
    
  }

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

  /**
   * Add or remove a damage part from the damage formula
   * @param {Event} event     The original click event
   * @return {Promise}
   * @private
   */
  async _onDamageControl(event) {
    event.preventDefault();
    const a = event.currentTarget;

    // Add new damage component
    if ( a.classList.contains("add-damage") ) {
      await this._onSubmit(event);  // Submit any unsaved changes
      const damage = this.item.data.data.damage;
      return this.item.update({"data.damage.parts": damage.parts.concat([["", ""]])});
    }

    // Remove a damage component
    if ( a.classList.contains("delete-damage") ) {
      await this._onSubmit(event);  // Submit any unsaved changes
      const li = a.closest(".damage-part");
      const damage = duplicate(this.item.data.data.damage);
      damage.parts.splice(Number(li.dataset.damagePart), 1);
      return this.item.update({"data.damage.parts": damage.parts});
    }
  }

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

  /**
   * Handle spawning the TraitSelector application which allows a checkbox of multiple trait options
   * @param {Event} event   The click event which originated the selection
   * @private
   */
  _onConfigureClassSkills(event) {
    event.preventDefault();
    const skills = this.item.data.data.skills;
    const choices = skills.choices && skills.choices.length ? skills.choices : Object.keys(CONFIG.SW5E.skills);
    const a = event.currentTarget;
    const label = a.parentElement;

    // Render the Trait Selector dialog
    new TraitSelector(this.item, {
      name: a.dataset.edit,
      title: label.innerText,
      choices: Object.entries(CONFIG.SW5E.skills).reduce((obj, e) => {
        if ( choices.includes(e[0] ) ) obj[e[0]] = e[1];
        return obj;
      }, {}),
      minimum: skills.number,
      maximum: skills.number
    }).render(true)
  }
}