const { HandlebarsApplicationMixin } = foundry.applications.api;

import { MournbladeCYD2Utility } from "../../mournblade-cyd2-utility.js";

export default class MournbladeCYD2ItemSheetV2 extends HandlebarsApplicationMixin(foundry.applications.sheets.ItemSheetV2) {

  constructor(options = {}) {
    super(options);
    this.#dragDrop = this.#createDragDropHandlers();
  }

  #dragDrop;

  /** @override */
  static DEFAULT_OPTIONS = {
    classes: ["fvtt-mournblade-cyd-2-0", "item"],
    position: {
      width: 620,
      height: 600,
    },
    form: {
      submitOnChange: true,
    },
    window: {
      resizable: true,
    },
    tabs: [
      {
        navSelector: 'nav[data-group="primary"]',
        contentSelector: "section.sheet-body",
        initial: "description",
      },
    ],
    dragDrop: [{ dragSelector: "[data-drag]", dropSelector: null }],
    actions: {
      editImage: MournbladeCYD2ItemSheetV2.#onEditImage,
      postItem: MournbladeCYD2ItemSheetV2.#onPostItem,
      addPredilection: MournbladeCYD2ItemSheetV2.#onAddPredilection,
      deletePredilection: MournbladeCYD2ItemSheetV2.#onDeletePredilection,
    },
  };

  tabGroups = { primary: "description" };

  /** @override */
  async _prepareContext() {
    return {
      fields: this.document.schema.fields,
      systemFields: this.document.system.schema.fields,
      item: this.document,
      system: this.document.system,
      source: this.document.toObject(),
      enrichedDescription: await foundry.applications.ux.TextEditor.implementation.enrichHTML(
        this.document.system.description || "", { async: true }
      ),
      isEditMode: true,
      isEditable: this.isEditable,
      isGM: game.user.isGM,
      config: game.system.mournbladecyd2.config,
    };
  }

  /** @override */
  _onRender(context, options) {
    super._onRender(context, options);
    this.#dragDrop.forEach((d) => d.bind(this.element));

    // Tab navigation
    const nav = this.element.querySelector('nav.tabs[data-group]');
    if (nav) {
      const group = nav.dataset.group;
      const activeTab = this.tabGroups[group] || "description";
      nav.querySelectorAll('[data-tab]').forEach(link => {
        const tab = link.dataset.tab;
        link.classList.toggle('active', tab === activeTab);
        link.addEventListener('click', (event) => {
          event.preventDefault();
          this.tabGroups[group] = tab;
          this.render();
        });
      });
      this.element.querySelectorAll(`[data-group="${group}"][data-tab]`).forEach(content => {
        content.classList.toggle('active', content.dataset.tab === activeTab);
      });
    }
  }

  #createDragDropHandlers() {
    return this.options.dragDrop.map(d => {
      d.permissions = { dragstart: () => this.isEditable };
      d.callbacks = { dragstart: this._onDragStart.bind(this) };
      return new foundry.applications.ux.DragDrop.implementation(d);
    });
  }

  _onDragStart(event) {}

  // #region Actions

  static async #onEditImage(event) {
    const fp = new FilePicker({
      type: "image",
      current: this.document.img,
      callback: (path) => this.document.update({ img: path })
    });
    fp.browse();
  }

  static async #onPostItem(event) {
    event.preventDefault();
    const item = this.document;
    const chatData = foundry.utils.duplicate(item);
    if (item.actor) {
      chatData.actor = { id: item.actor.id };
    }
    if (chatData.img?.includes("/blank.png")) {
      chatData.img = null;
    }
    chatData.jsondata = JSON.stringify({
      compendium: "postedItem",
      payload: chatData,
    });
    const html = await foundry.applications.handlebars.renderTemplate(
      "systems/fvtt-mournblade-cyd-2-0/templates/post-item.hbs",
      chatData
    );
    ChatMessage.create({ user: game.user.id, content: html });
  }

  static async #onAddPredilection(event) {
    const preds = foundry.utils.duplicate(this.document.system.predilections || []);
    preds.push({ id: foundry.utils.randomID(), name: "Nouvelle prédilection", description: "", acquise: false, maitrise: false, used: false });
    await this.document.update({ "system.predilections": preds });
  }

  static async #onDeletePredilection(event, target) {
    const idx = Number(target.dataset.predilectionIndex);
    const preds = foundry.utils.duplicate(this.document.system.predilections || []);
    preds.splice(idx, 1);
    await this.document.update({ "system.predilections": preds });
  }
}