/*
 This file is part of GNU Taler
 (C) 2021 Taler Systems S.A.

 GNU Taler is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

/**
*
* @author Sebastian Javier Marchano (sebasjm)
*/
import { h, VNode } from "preact";
import { useState } from "preact/hooks";
import { Translate, useTranslator } from "../../i18n";
import { InputProps, useField } from "./useField";

export interface Props<T> extends InputProps<T> {
  isValid?: (e: any) => boolean;
  addonBefore?: string;
  toStr?: (v?: any) => string;
  fromStr?: (s: string) => any;
}

const defaultToString = (f?: any): string => f || ''
const defaultFromString = (v: string): any => v as any

export function InputArray<T>({ name, readonly, placeholder, tooltip, label, help, addonBefore, isValid = () => true, fromStr = defaultFromString, toStr = defaultToString }: Props<keyof T>): VNode {
  const { error: formError, value, onChange, required } = useField<T>(name);
  const [localError, setLocalError] = useState<string | null>(null)

  const error = localError || formError

  const array: any[] = (value ? value! : []) as any;
  const [currentValue, setCurrentValue] = useState('');
  const i18n = useTranslator();

  return <div class="field is-horizontal">
    <div class="field-label is-normal">
      <label class="label">
        {label}
        {tooltip && <span class="icon has-tooltip-right" data-tooltip={tooltip}>
          <i class="mdi mdi-information" />
        </span>}
      </label>
    </div>
    <div class="field-body is-flex-grow-3">
      <div class="field">
        <div class="field has-addons">
          {addonBefore && <div class="control">
            <a class="button is-static">{addonBefore}</a>
          </div>}
          <p class="control is-expanded has-icons-right">
            <input class={error ? "input is-danger" : "input"} type="text"
              placeholder={placeholder} readonly={readonly} disabled={readonly}
              name={String(name)} value={currentValue}
              onChange={(e): void => setCurrentValue(e.currentTarget.value)} />
            {required && <span class="icon has-text-danger is-right">
              <i class="mdi mdi-alert" />
            </span>}
          </p>
          <p class="control">
            <button class="button is-info has-tooltip-left" disabled={!currentValue} onClick={(): void => {
              const v = fromStr(currentValue)
              if (!isValid(v)) {
                setLocalError(i18n`The value ${v} is invalid for a payment url`)
                return;
              }
              setLocalError(null)
              onChange([v, ...array] as any);
              setCurrentValue('');
            }} data-tooltip={i18n`add element to the list`}><Translate>add</Translate></button>
          </p>
        </div>
        {help}
        {error && <p class="help is-danger"> {error} </p>}
        {array.map((v, i) => <div key={i} class="tags has-addons mt-3 mb-0">
          <span class="tag is-medium is-info mb-0" style={{ maxWidth: '90%' }}>{v}</span>
          <a class="tag is-medium is-danger is-delete mb-0" onClick={() => {
            onChange(array.filter(f => f !== v) as any);
            setCurrentValue(toStr(v));
          }} />
        </div>
        )}
      </div>

    </div>
  </div>;
}