/**
 * Copyright Aquera Inc 2025
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */

import type { VirtualOption } from './types.js';

export class VirtualSelectSelectionManager {
  static createVirtualOptionsFromValues(
    value: string | string[], 
    data: any[], 
    getDisplayText: (item: any) => string,
    getItemValue?: (item: any) => string,
    allowHtmlLabel?: boolean
  ): VirtualOption[] {
    if (!value || (Array.isArray(value) && value.length === 0)) {
      return [];
    }

    const values = Array.isArray(value) ? value : [value];
    
    return values.map(valueItem => {
      // Use enhanced functions if available, otherwise fallback to basic logic
      const displayTextFn = getDisplayText;
      const valueFn = getItemValue || ((item: any) => item?.value || item);
      
      const item = data.find((item: any) => {
        const itemValue = valueFn(item);
        const itemDisplayText = displayTextFn(item);
        return String(itemValue) === String(valueItem) || String(itemDisplayText) === String(valueItem);
      });
      
      const displayText = item ? displayTextFn(item) : valueItem;
      
      return {
        value: valueItem,
        selected: true,
        getTextLabel: () => {
          if(!allowHtmlLabel){
            return displayText;
          }

          // If displayText contains HTML, strip tags
          if (typeof displayText === 'string' && /<[^>]+>/.test(displayText)) {
            const div = document.createElement('div');
            div.innerHTML = displayText;
            return div.textContent || div.innerText || '';
          }
          return displayText;
        },
        getOptionPrefix: () => '',
      };
    });
  }

  static updateDisplayLabel(selectedOptions: VirtualOption[], placeholder: string, multiple: boolean, value: string | string[]): string {
    if (multiple) {
      if (placeholder && selectedOptions.length === 0) {
        return '';
      } else {
        return selectedOptions.length + ' selected';
      }
    } else {
      const currentValue = Array.isArray(value) ? value[0] : value;
      return selectedOptions[0]?.getTextLabel()
        ? selectedOptions[0].getTextLabel()
        : currentValue ?? '';
    }
  }

  static updateValue(selectedOptions: VirtualOption[], multiple: boolean): string | string[] {
    if (multiple) {
      return selectedOptions.map(el => el.value);
    } else {
      return selectedOptions[0]?.value ?? '';
    }
  }
}