import { ConverterSet, ConverterType } from '../domain.js';
import {
  alignIfLegacy,
  decodeText,
  encodeText,
  WIX_PROTOCOL,
} from './converters-utils.js';

export function createMediaConverter<
  T extends {
    id?: string | null;
    url?: string | null;
    filename?: string | null;
  },
>(fieldType: string, commonType: string): ConverterSet {
  return {
    types: [commonType],

    [ConverterType.FROM_JSON]: {
      transform: (val: T) => {
        if (!val) {
          return;
        }

        let fileName = '';
        if (val?.filename) {
          fileName = `/${encodeText(val.filename)}`;
        }

        return val.id ? `wix:${fieldType}://v1/${val.id}${fileName}` : val.url;
      },
    },

    [ConverterType.TO_JSON]: {
      transform: (val: string): T | undefined => {
        if (!val) {
          return;
        }

        const alignedUrl = alignIfLegacy(val, fieldType);

        const { protocol, pathname } = new URL(alignedUrl);

        const [id, filename] = pathname
          .replace(`${fieldType}://v1/`, '')
          .split('/');

        if (protocol === WIX_PROTOCOL) {
          if (!filename) {
            return { id } as T;
          }

          return {
            id,
            filename: decodeText(filename),
          } as T;
        }

        return { url: val } as T;
      },
    },
  };
}