import * as React from 'react';
import { useEffect, useState } from 'react';
import { SubmitHandler, useForm, useWatch } from 'react-hook-form';
import { Machine } from '../../models/machine';
import MachineAPI from '../../api/machine';
import { useTranslation } from 'react-i18next';
import { FormInput } from '../form/form-input';
import { FormImageUpload } from '../form/form-image-upload';
import { IApplication } from '../../models/application';
import { Loader } from '../base/loader';
import { react2angular } from 'react2angular';
import { ErrorBoundary } from '../base/error-boundary';
import { FormRichText } from '../form/form-rich-text';
import { FormSwitch } from '../form/form-switch';
import { FormMultiFileUpload } from '../form/form-multi-file-upload';
import { FabButton } from '../base/fab-button';
import { AdvancedAccountingForm } from '../accounting/advanced-accounting-form';
import { FormSelect } from '../form/form-select';
import { SelectOption } from '../../models/select';
import MachineCategoryAPI from '../../api/machine-category';
import SettingAPI from '../../api/setting';
import { MachineCategory } from '../../models/machine-category';
import { FabAlert } from '../base/fab-alert';

declare const Application: IApplication;

interface MachineFormProps {
  action: 'create' | 'update',
  machine?: Machine,
  onError: (message: string) => void,
  onSuccess: (message: string) => void,
}

/**
 * Form to edit or create machines
 */
export const MachineForm: React.FC<MachineFormProps> = ({ action, machine, onError, onSuccess }) => {
  const { handleSubmit, register, control, setValue, formState } = useForm<Machine>({ defaultValues: { ...machine } });
  const output = useWatch<Machine>({ control });
  const { t } = useTranslation('admin');

  const [machineCategories, setMachineCategories] = useState<Array<MachineCategory>>([]);
  const [isActiveAccounting, setIsActiveAccounting] = useState<boolean>(false);

  // retrieve the full list of machine categories on component mount
  // check advanced accounting activation
  useEffect(() => {
    MachineCategoryAPI.index()
      .then(data => setMachineCategories(data))
      .catch(e => onError(e));
    SettingAPI.get('advanced_accounting').then(res => setIsActiveAccounting(res.value === 'true')).catch(onError);
  }, []);

  /**
   * Callback triggered when the user validates the machine form: handle create or update
   */
  const onSubmit: SubmitHandler<Machine> = (data: Machine) => {
    MachineAPI[action](data).then((res) => {
      onSuccess(t(`app.admin.machine_form.${action}_success`));
      window.location.href = `/#!/machines/${res.slug}`;
    }).catch(error => {
      onError(error);
    });
  };

  /**
   * Callack triggered when the user changes the 'reservable' status of the machine:
   * A reservable machine cannot be disabled
   */
  const onReservableToggled = (reservable: boolean) => {
    if (reservable) {
      setValue('disabled', false);
    }
  };

  /**
   * Callack triggered when the user changes the 'disabled' status of the machine:
   * A disabled machine cannot be reservable
   */
  const onDisabledToggled = (disabled: boolean) => {
    if (disabled) {
      setValue('reservable', false);
    }
  };

  /**
   * Convert all machine categories to the select format
   */
  const buildOptions = (): Array<SelectOption<number>> => {
    return machineCategories.map(t => {
      return { value: t.id, label: t.name };
    });
  };

  return (
    <div className="machine-form">
      <header>
        <h2>{t('app.admin.machine_form.ACTION_title', { ACTION: action })}</h2>
        <FabButton onClick={handleSubmit(onSubmit)} className="fab-button save-btn is-main">
          {t('app.admin.machine_form.save')}
        </FabButton>
      </header>
      <form className="machine-form-content" onSubmit={handleSubmit(onSubmit)}>
        {action === 'create' &&
          <FabAlert level='warning'>
            {t('app.admin.machine_form.watch_out_when_creating_a_new_machine_its_prices_are_initialized_at_0_for_all_subscriptions')} {t('app.admin.machine_form.consider_changing_them_before_creating_any_reservation_slot')}
          </FabAlert>
        }
        <section>
          <header>
            <p className="title">{t('app.admin.machine_form.description')}</p>
          </header>
          <div className="content">
            <FormInput register={register} id="name"
                       formState={formState}
                       rules={{ required: true }}
                       label={t('app.admin.machine_form.name')} />
            <FormImageUpload setValue={setValue}
                             register={register}
                             control={control}
                             formState={formState}
                             rules={{ required: true }}
                             id="machine_image_attributes"
                             accept="image/*"
                             defaultImage={output.machine_image_attributes}
                             label={t('app.admin.machine_form.illustration')} />
            <FormRichText control={control}
                          id="description"
                          rules={{ required: true }}
                          formState={formState}
                          label={t('app.admin.machine_form.description')}
                          limit={null}
                          heading bulletList blockquote link image video />
            <FormRichText control={control}
                          id="spec"
                          rules={{ required: true }}
                          formState={formState}
                          label={t('app.admin.machine_form.technical_specifications')}
                          limit={null}
                          heading bulletList link />
            <FormSelect options={buildOptions()}
                        control={control}
                        id="machine_category_id"
                        formState={formState}
                        label={t('app.admin.machine_form.category')} />
          </div>
        </section>

        <section>
          <header>
            <p className="title">{t('app.admin.machine_form.attachments')}</p>
          </header>
          <div className="content">
            <div className='form-item-header machine-files-header'>
              <p>{t('app.admin.machine_form.attached_files_pdf')}</p>
            </div>
            <FormMultiFileUpload setValue={setValue}
                                 addButtonLabel={t('app.admin.machine_form.add_an_attachment')}
                                 control={control}
                                 accept="application/pdf"
                                 register={register}
                                 id="machine_files_attributes"
                                 className="machine-files" />
          </div>
        </section>

        <section>
          <header>
            <p className="title">{t('app.admin.machine_form.settings')}</p>
          </header>
          <div className="content">
            <FormSwitch control={control}
                      id="reservable"
                      label={t('app.admin.machine_form.reservable')}
                      onChange={onReservableToggled}
                      tooltip={t('app.admin.machine_form.reservable_help')}
                      defaultValue={true} />
            <FormSwitch control={control}
                        id="disabled"
                        onChange={onDisabledToggled}
                        label={t('app.admin.machine_form.disable_machine')}
                        tooltip={t('app.admin.machine_form.disabled_help')} />
          </div>
        </section>

        {isActiveAccounting &&
          <section>
            <AdvancedAccountingForm register={register} onError={onError} />
          </section>
        }
      </form>
    </div>
  );
};

const MachineFormWrapper: React.FC<MachineFormProps> = (props) => {
  return (
    <Loader>
      <ErrorBoundary>
        <MachineForm {...props} />
      </ErrorBoundary>
    </Loader>
  );
};

Application.Components.component('machineForm', react2angular(MachineFormWrapper, ['action', 'machine', 'onError', 'onSuccess']));