import {pushUnique} from '../../lib/utils.js';
import {parseHTML, replaceChildNodes} from '../../lib/dom.js';

// Base class of the view classes
export default class View {
  constructor(picker, config) {
    Object.assign(this, config, {
      picker,
      element: parseHTML(`<div class="datepicker-view"></div>`).firstChild,
      selected: [],
    });
    this.init(this.picker.datepicker.config);
  }

  init(options) {
    if (options.pickLevel !== undefined) {
      this.isMinView = this.id === options.pickLevel;
    }
    this.setOptions(options);
    this.updateFocus();
    this.updateSelection();
  }

  // Execute beforeShow() callback and apply the result to the element
  // args:
  // - current - current value on the iteration on view rendering
  // - timeValue - time value of the date to pass to beforeShow()
  performBeforeHook(el, current, timeValue) {
    let result = this.beforeShow(new Date(timeValue));
    switch (typeof result) {
      case 'boolean':
        result = {enabled: result};
        break;
      case 'string':
        result = {classes: result};
    }

    if (result) {
      if (result.enabled === false) {
        el.classList.add('disabled');
        pushUnique(this.disabled, current);
      }
      if (result.classes) {
        const extraClasses = result.classes.split(/\s+/);
        el.classList.add(...extraClasses);
        if (extraClasses.includes('disabled')) {
          pushUnique(this.disabled, current);
        }
      }
      if (result.content) {
        replaceChildNodes(el, result.content);
      }
    }
  }
}