import React, { Fragment, useEffect, useRef } from 'react';

import { useDB } from 'react-pouchdb';

import {
  IonButton,
  IonButtons,
  IonContent,
  IonIcon,
  IonInput,
  IonItem,
  IonLabel,
  IonList,
  IonListHeader,
  IonModal,
  IonTitle,
  IonToolbar,
} from '@ionic/react';
import { options } from 'ionicons/icons';
import { enterAnimation, leaveAnimation } from '../../lib/animation';
import { useDispatch, useSelector } from 'react-redux';
import { settingsActions, SettingsState } from '../../store/settings';
import uri from '../../lib/ids';
import _ from 'lodash';

const Settings: React.FC<{}> = () => {
  const dispatch = useDispatch();
  const db = useDB();

  useEffect(() => {
    const initFromDb = async () => {
      try {
        const settingsFromDb = await db.get(uri('settings', {}));
        console.log(
          `settingsFromDb: ${JSON.stringify(settingsFromDb.settings)}`
        );
        dispatch(settingsActions.saveSettings(settingsFromDb.settings));
      } catch {}
    };
    initFromDb();
  }, [db, dispatch]);

  const settingsState = useSelector(
    (state: { settings: SettingsState }) => state.settings
  );

  useEffect(() => {
    if (!settingsState.default) {
      const settingsFromRedux = async () => {
        const id = uri('settings', {});
        var settingsFromDb;
        try {
          settingsFromDb = await db.get(id);
        } catch (error) {
          console.log(
            `Error getting settings from db: ${JSON.stringify(error)}`
          );
          settingsFromDb = { _id: id, settings: {} };
        }
        if (!_.isEqual(settingsState, settingsFromDb.settings)) {
          console.log(`settingsFromRedux: ${JSON.stringify(settingsState)}`);
          settingsFromDb.settings = settingsState;
          db.put(settingsFromDb);
        }
      };
      settingsFromRedux();
    }
  }, [db, settingsState]);

  const pseudo = useRef<HTMLIonInputElement>(null);
  const minTimeInterval = useRef<HTMLIonInputElement>(null);
  const minDistance = useRef<HTMLIonInputElement>(null);

  const modal = useRef<HTMLIonModalElement>(null);

  const dismiss = () => {
    modal.current?.dismiss();
  };

  const save = () => {
    dispatch(
      settingsActions.saveSettings({
        user: {
          pseudo: pseudo.current?.value,
        },
        geolocation: {
          minTimeInterval: minTimeInterval.current?.value,
          minDistance: minDistance.current?.value,
        },
      })
    );
    dismiss();
  };

  return (
    <Fragment>
      <IonButton id='open-SettingsDialog'>
        <IonIcon slot='icon-only' icon={options} />
      </IonButton>
      <IonModal
        ref={modal}
        trigger='open-SettingsDialog'
        enterAnimation={enterAnimation}
        leaveAnimation={leaveAnimation}
        className='full-height'
      >
        <IonToolbar>
          <IonTitle>Settings</IonTitle>
          <IonButtons slot='end'>
            <IonButton onClick={() => dismiss()}>Close</IonButton>
          </IonButtons>
        </IonToolbar>
        <IonContent>
          <IonList lines='full' class='ion-no-margin'>
            <IonListHeader lines='full'>
              <IonLabel>User</IonLabel>
            </IonListHeader>
            <IonItem>
              <IonLabel>Pseudo: </IonLabel>
              <IonInput
                ref={pseudo}
                value={settingsState.user.pseudo}
                autocomplete='nickname'
              ></IonInput>
            </IonItem>
          </IonList>
          <IonList lines='full' class='ion-no-margin'>
            <IonListHeader lines='full'>
              <IonLabel>Geolocation</IonLabel>
            </IonListHeader>
            <IonItem>
              <IonLabel>Minimal time interval (ms): </IonLabel>
              <IonInput
                value={settingsState.geolocation.minTimeInterval}
                ref={minTimeInterval}
                inputMode='numeric'
                type='number'
              ></IonInput>
            </IonItem>
            <IonItem>
              <IonLabel>Minimal distance (m): </IonLabel>
              <IonInput
                value={settingsState.geolocation.minDistance}
                ref={minDistance}
                inputMode='numeric'
                type='number'
              ></IonInput>
            </IonItem>
          </IonList>
          <IonItem>
            <IonToolbar class='secondary'>
              <IonButtons slot='secondary'>
                <IonButton
                  shape='round'
                  fill='solid'
                  color='primary'
                  onClick={() => save()}
                >
                  Save
                </IonButton>
                <IonButton
                  shape='round'
                  fill='outline'
                  color='primary'
                  onClick={() => dismiss()}
                >
                  Cancel
                </IonButton>
              </IonButtons>
            </IonToolbar>
          </IonItem>
        </IonContent>
      </IonModal>
    </Fragment>
  );
};

export default Settings;