const { HandlebarsApplicationMixin, ApplicationV2 } = foundry.applications.api;

/**
 * A UI element which displays the Users defined for this world.
 * Currently active users are always displayed, while inactive users can be displayed on toggle.
 *
 * @extends ApplicationV2
 * @mixes HandlebarsApplication
 */

export default class Resources extends HandlebarsApplicationMixin(ApplicationV2) {
  constructor(options={}) {
    super(options);
  }

  /** @inheritDoc */
  static DEFAULT_OPTIONS = {
    id: "resources",
    classes: ["flexcol"],
    tag: "div",
    window: {
        frame: true,
        title: "Fear",
        positioned: true
    },
    actions: {
        setFear: Resources.setFear,
        increaseFear: Resources.increaseFear 
    },
    position: {}
  };

  /** @override */
  static PARTS = {
    resources: {
      root: true,
      template: "systems/daggerheart/templates/views/resources.hbs"
    //   template: "templates/ui/players.hbs"
    }
  };

  get currentFear() {
    return game.settings.get(SYSTEM.id, SYSTEM.SETTINGS.gameSettings.Resources.Fear);
  }

  get maxFear() {
    return game.settings.get(SYSTEM.id, SYSTEM.SETTINGS.gameSettings.Resources.MaxFear);
  }

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

  /** @override */
  async _prepareContext(_options) {
    const display = game.settings.get(SYSTEM.id, SYSTEM.SETTINGS.gameSettings.Resources.DisplayFear),
        current = this.currentFear,
        max = this.maxFear,
        percent = (current / max) * 100,
        isGM = game.user.isGM;
    // Return the data for rendering
    return {display, current, max, percent, isGM};
  }

  /** @override */
  async _preFirstRender(context, options) {
    options.position = game.user.getFlag(SYSTEM.id, 'app.resources.position') ?? {};
  }

  /** @override */
  async _preRender(context, options) {
    if(this.currentFear > this.maxFear) await game.settings.set(SYSTEM.id, SYSTEM.SETTINGS.gameSettings.Resources.Fear, this.maxFear);
  }

  _onPosition(position) {
    game.user.setFlag(SYSTEM.id, 'app.resources.position', position);
  }

  async close(options={}) {
    if(!options.allowed) return;
    else super.close(options);
  }

  static async setFear(event, target) {
    if(!game.user.isGM) return;
    const fearCount = Number(target.dataset.index ?? 0);
    await this.updateFear(this.currentFear === fearCount + 1 ? fearCount : fearCount + 1);
  }

  static async increaseFear(event, target) {
    let value = target.dataset.increment ?? 0,
        operator = value.split('')[0] ?? null;
    value = Number(value);
    await this.updateFear(operator ? this.currentFear + value : value);
  }

  async updateFear(value) {
    if(!game.user.isGM) return;
    value = Math.max(0, Math.min(this.maxFear, value));
    await game.settings.set(SYSTEM.id, SYSTEM.SETTINGS.gameSettings.Resources.Fear, value);
    await this.render(true);
  }
}