import React, { Fragment, useState } from 'react';

import NotificationAdapterMutator from './components/notificationAdapter/NotificationAdapterMutator';
import NotificationAdapterTable from '../../../components/table/NotificationAdapterTable';
import { Header, Icon, Form, Popup, Button, Label } from 'semantic-ui-react';
import ProviderTable from '../../../components/table/ProviderTable';
import ProviderMutator from './components/provider/ProviderMutator';
import ToastContext from '../../../components/toasts/ToastContext';
import Headline from '../../../components/headline/Headline';
import { useDispatch, useSelector } from 'react-redux';
import { xhrPost } from '../../../services/xhr';
import { useHistory } from 'react-router-dom';
import { useParams } from 'react-router';

import './JobMutation.less';
import Switch from 'react-switch';

export default function JobMutator() {
  const jobs = useSelector((state) => state.jobs.jobs);
  const params = useParams();

  const jobToBeEdit = params.jobId == null ? null : jobs.find((job) => job.id === params.jobId);

  const defaultBlacklist = jobToBeEdit?.blacklist || [];
  const defaultName = jobToBeEdit?.name || null;
  const defaultProviderData = jobToBeEdit?.provider || [];
  const defaultNotificationAdapter = jobToBeEdit?.notificationAdapter || [];
  const defaultEnabled = jobToBeEdit?.enabled ?? true;

  const [providerCreationVisible, setProviderCreationVisibility] = useState(false);
  const [notificationCreationVisible, setNotificationCreationVisibility] = useState(false);
  const [editNotificationAdapter, setEditNotificationAdapter] = useState(null);
  const [providerData, setProviderData] = useState(defaultProviderData);
  const [name, setName] = useState(defaultName);
  const [blacklist, setBlacklist] = useState(defaultBlacklist);
  const [notificationAdapterData, setNotificationAdapterData] = useState(defaultNotificationAdapter);
  const [enabled, setEnabled] = useState(defaultEnabled);
  const history = useHistory();
  const dispatch = useDispatch();
  const ctx = React.useContext(ToastContext);

  const header = (name, icon) => (
    <Header as="h5" inverted>
      <Icon name={icon} inverted />
      {name}
    </Header>
  );

  const help = (helpText) => (
    <div>
      <Popup
        content={helpText}
        trigger={
          <Header as="h6" inverted>
            <Icon name="help circle" inverted />
            What is this?
          </Header>
        }
      />
    </div>
  );

  const isSavingEnabled = () => {
    return notificationAdapterData.length > 0 && providerData.length > 0 && name != null && name.length > 0;
  };

  const mutateJob = async () => {
    try {
      await xhrPost('/api/jobs', {
        provider: providerData,
        notificationAdapter: notificationAdapterData,
        name,
        blacklist,
        enabled,
        jobId: jobToBeEdit?.id || null,
      });
      await dispatch.jobs.getJobs();
      ctx.showToast({
        title: 'Success',
        message: 'Job successfully saved...',
        delay: 5000,
        backgroundColor: '#87eb8f',
        color: '#000',
      });
      history.push('/jobs');
    } catch (Exception) {
      console.error(Exception.json.message);

      ctx.showToast({
        title: 'Error',
        message: Exception.json != null ? Exception.json.message : Exception,
        delay: 8000,
        backgroundColor: '#db2828',
        color: '#fff',
      });
    }
  };

  return (
    <Fragment>
      <ProviderMutator
        visible={providerCreationVisible}
        onVisibilityChanged={(visible) => setProviderCreationVisibility(visible)}
        selected={providerData}
        onData={(data) => {
          setProviderData([...providerData, data]);
        }}
      />

      {notificationCreationVisible && (
        <NotificationAdapterMutator
          visible={notificationCreationVisible}
          onVisibilityChanged={(visible) => {
            setEditNotificationAdapter(null);
            setNotificationCreationVisibility(visible);
          }}
          selected={notificationAdapterData}
          editNotificationAdapter={
            editNotificationAdapter == null
              ? null
              : notificationAdapterData.find((adapter) => adapter.id === editNotificationAdapter)
          }
          onData={(data) => {
            const oldData = [...notificationAdapterData].filter((o) => o.id !== data.id);
            setNotificationAdapterData([...oldData, data]);
          }}
        />
      )}

      <Headline text={jobToBeEdit ? 'Edit a Job' : 'Create a new Job'} />
      <Form className="jobMutation__form">
        <div className="jobMutation__block">
          <Form.Input
            type="text"
            maxLength={40}
            placeholder="Name"
            autoFocus
            inverted
            width={6}
            defaultValue={name}
            onChange={(e) => setName(e.target.value)}
          />
        </div>

        <div className="jobMutation__block jobMutation__separator">
          {header('Provider', 'briefcase')}

          <div className="jobMutation__helpContainer">
            {help(
              'A provider is essentially the service (Immowelt etc.) that Fredy is using to search for new listings. When adding a new provider, Fredy will open a new tab pointing ' +
                'to the website of this provider. You have to adjust your search parameter and click on "Search". If the results are being shown, copy the browser url. This is the url, Fredy will use ' +
                'to search for new listings.'
            )}

            <Form.Button primary className="jobMutation__newButton" onClick={() => setProviderCreationVisibility(true)}>
              <Icon name="plus" />
              Add new Provider
            </Form.Button>
          </div>
          <ProviderTable
            providerData={providerData}
            onRemove={(providerId) => {
              setProviderData(providerData.filter((provider) => provider.id !== providerId));
            }}
          />
        </div>

        <div className="jobMutation__block jobMutation__separator">
          {header('Notification Adapter', 'bell')}

          <div className="jobMutation__helpContainer">
            {help(
              'Fredy supports multiple ways to notify you about new findings. These are called notification adapter. You can chose between email, Telegram etc.'
            )}

            <Form.Button
              primary
              className="jobMutation__newButton"
              onClick={() => setNotificationCreationVisibility(true)}
            >
              <Icon name="plus" />
              Add new Notification Adapter
            </Form.Button>
          </div>

          <NotificationAdapterTable
            notificationAdapter={notificationAdapterData}
            onRemove={(adapterId) => {
              setEditNotificationAdapter(null);
              setNotificationAdapterData(notificationAdapterData.filter((adapter) => adapter.id !== adapterId));
            }}
            onEdit={(adapterId) => {
              setEditNotificationAdapter(adapterId);
              setNotificationCreationVisibility(true);
            }}
          />
        </div>

        <div className="jobMutation__block jobMutation__separator">
          {header('Blacklist', 'bell')}

          <div className="jobMutation__helpContainer">
            {help(
              'If a listing contains one of these words, it will be filtered out. Words must be comma separated. To remove a word from the black list, just click the red label(s).'
            )}
          </div>

          <Form.Input
            type="text"
            className="jobMutation__spaceTop"
            maxLength={40}
            placeholder="Comma separated list of blacklisted words"
            autoFocus
            inverted
            width={6}
            onChange={(e) => {
              if (e.target.value.indexOf(',') !== -1) {
                setBlacklist([...blacklist, e.target.value.replace(',', '')]);
                e.target.value = '';
              }
            }}
          />
          {blacklist.map((blacklistWord) => (
            <Label
              as="a"
              key={`blacklist_${blacklistWord}`}
              onClick={(e, obj) => {
                setBlacklist(blacklist.filter((word) => word !== obj.content));
              }}
              content={blacklistWord}
              icon="thumbs down"
              color="red"
            />
          ))}
        </div>

        <div className="jobMutation__block jobMutation__separator">
          {header('Job activation', 'play circle outline')}

          <div className="jobMutation__helpContainer">
            {help(
              'Whether or not the job is activated. If it is not activated, it will be ignored when Fredy checks for new listings.'
            )}
          </div>

          <Switch className="jobMutation__spaceTop" onChange={(checked) => setEnabled(checked)} checked={enabled} />
        </div>

        <Button color="red" onClick={() => history.push('/jobs')}>
          Cancel
        </Button>
        <Button color="green" disabled={!isSavingEnabled()} onClick={mutateJob}>
          Save
        </Button>
      </Form>
    </Fragment>
  );
}