import React from 'react';
import { Alert, Button, Linking, Text, View } from 'react-native';
// Redux
import { connect } from 'react-redux';
import { initContact } from '../Store/Actions/contacts';
import { initDirectories } from '../Store/Actions/directories';
import { initDocuments } from '../Store/Actions/documents';
// Sentry
import * as Sentry from '@sentry/react-native';
// Style
import styles from '../../Resources/Styles/SyncStyle';
// Translations
import i18n from '../../I18n';
// Controller
import SyncController from '../Controllers/SyncController';
// Progress
import * as Progress from 'react-native-progress';
// Database
import {
  Contact,
  Directory,
  Document,
  SendBrochure,
  User,
} from '../../Database';
// FileSytem
import * as FileSystem from 'expo-file-system';

function mapStateToProps(state) {
  return {
    syncVersion: state.app.syncVersion,
    currentUser: state.app.currentUser,
    locale: state.locale.locale,
    mainColor: state.app.mainColor,
    directories: state.directories,
  };
}

const mapDispatchToProps = dispatch => {
  return {
    init: () => dispatch({ type: 'INIT' }),
    initUsers: () => dispatch({ type: 'INIT_USERS' }),
    initDirectories: (lang, user) => dispatch(initDirectories(lang, user)),
    initDocuments: (lang, directories) =>
      dispatch(initDocuments(lang, directories)),
    initContact: currentUser => dispatch(initContact(currentUser)),
    initBtns: () => dispatch({ type: 'INIT_HOME_BTNS' }),
    updateVersion: version =>
      dispatch({
        type: 'UPDATE_VERSION',
        data: version,
      }),
    updateShowIsActive: value =>
      dispatch({
        type: 'UPDATE_SHOW_IS_ACTIVE',
        data: value,
      }),
  };
};

class SyncScreen extends React.Component {
  state = {
    progress: 0,
    txtStep: '',
    downloadProgress: 0,
    downloadingFile: false,
    processing: false,
    newApp: false,
    forced: false,
  };

  componentDidMount() {
    const { forceSync } = this.props.route.params;
    if (forceSync === true) {
      this.setState({ forced: true });
      this.sync();
    }
  }

  render() {
    const fileProgress = this.fileProgress();
    return (
      <View style={styles.container}>
        <Progress.Circle
          size={250}
          progress={this.state.progress}
          showsText={true}
          color={this.props.mainColor}
        />
        <View style={styles.btnWrapper}>
          <Button
            disabled={this.state.processing}
            color={this.props.mainColor}
            title={i18n.t('sync_s.start_sync')}
            onPress={() => this.sync()}
          />
        </View>
        <View style={styles.btnWrapper}>
          <Text>
            {this.state.txtStep} {fileProgress}
          </Text>
        </View>
      </View>
    );
  }

  async sync() {
    let errorStatus = false;
    const isConnected = await SyncController.checkConnection()
      .then(state => {
        //console.log(state.isConnected)
        return state.isConnected;
      })
      .catch(error => {
        //console.log(error);
        return false;
      });
    if (!isConnected) {
      Alert.alert(
        i18n.t('global.warning'),
        i18n.t('error.must_be_connected_internet_sync'),
      );
      return;
    }
    this.setState({ processing: true });
    // getVersion
    const resVersion = await SyncController.getVersion()
      .then(res => {
        return res.data;
      })
      .catch(error => {
        Sentry.captureException(error);
        Alert.alert(i18n.t('error.error'), i18n.t('error.error_has_occurred'));
        errorStatus = true;
      });
    if (errorStatus) {
      return false;
    }
    this.props.updateVersion(resVersion.version);
    this.props.updateShowIsActive(resVersion.ShowIsActive);
    this.setState({ newApp: resVersion.newApp });
    // getUsers
    this.setState({ txtStep: i18n.t('sync_s.updating_users') + '...' });
    const resUsers = await SyncController.getUsers()
      .then(res => {
        User.clear();
        return res.data;
      })
      .catch(error => {
        Sentry.captureException(error);
        Alert.alert(i18n.t('error.error'), i18n.t('error.error_has_occurred'));
        errorStatus = true;
      });
    if (errorStatus) {
      return false;
    }
    resUsers.forEach(user => {
      User.add(user);
    });
    // getContacts
    this.setState({
      progress: 0.1,
      txtStep: i18n.t('sync_s.updating_contacts') + '...',
    });
    const resContacts = await SyncController.getContacts(
      this.props.currentUser.id,
    )
      .then(res => {
        Contact.clear();
        return res.data;
      })
      .catch(error => {
        Sentry.captureException(error);
        Alert.alert(i18n.t('error.error'), i18n.t('error.error_has_occurred'));
        errorStatus = true;
      });
    if (errorStatus) {
      return false;
    }
    resContacts.forEach(contact => {
      Contact.add(contact);
    });
    //sendBrochures
    this.setState({
      progress: 0.2,
      txtStep: i18n.t('sync_s.sending_flyers') + '...',
    });
    let brochures = SendBrochure.getAll();
    for (const brochure of brochures) {
      await SyncController.sendBrochure(brochure)
        .then(res => {
          SendBrochure.delete(brochure.id);
        })
        .catch(error => {
          Sentry.captureException(error);
          Alert.alert(
            i18n.t('error.error'),
            i18n.t('error.error_has_occurred') + ' : Brochures',
          );
          errorStatus = true;
        });
    }
    if (errorStatus) {
      return false;
    }
    //getDirectories
    this.setState({
      progress: 0.3,
      txtStep: i18n.t('sync_s.updating_folders') + '...',
    });
    const resDirectories = await SyncController.getDirectories()
      .then(res => {
        Directory.clear();
        return res.data;
      })
      .catch(error => {
        Sentry.captureException(error);
        Alert.alert(i18n.t('error.error'), i18n.t('error.error_has_occurred'));
        errorStatus = true;
      });
    if (errorStatus) {
      return false;
    }
    resDirectories.forEach(dir => {
      Directory.add(dir);
    });
    // getDocuments
    this.setState({
      progress: 0.4,
      txtStep: i18n.t('sync_s.updating_docs') + '...',
    });
    const resDocuments = await SyncController.getDocuments()
      .then(res => {
        return res.data;
      })
      .catch(error => {
        Sentry.captureException(error);
        Alert.alert(i18n.t('error.error'), i18n.t('error.error_has_occurred'));
        errorStatus = true;
      });
    if (errorStatus) {
      return false;
    }
    const toDelete = Document.clear(resDocuments);
    resDocuments.forEach(document => {
      Document.update(document);
    });
    this.downloadDocuments(Document.getAll(), toDelete);
    // End
    this.setState({
      txtStep: i18n.t('sync_s.update_completed') + '.',
      processing: false,
    });
  }

  fileProgress() {
    if (this.state.downloadingFile === true) {
      return this.state.downloadProgress + ' %';
    }
  }

  downloadDocuments(docs, toDelete) {
    const version = this.props.syncVersion;
    this.getToDL(docs, 0).then(toDownload => {
      if (toDownload.length > 0) {
        this.setState({ progress: 0.5 });
        const docProgress = 0.5 / toDownload.length;
        this.download(toDownload, docProgress, 0).then(status => {
          if (status === true) {
            this.deleteFile(toDelete, 0).then(status => {
              this.finishSync(version);
            });
          } else {
            this.setState({
              txtStep: i18n.t('error.error_has_occurred') + '.',
            });
          }
        });
      } else {
        this.deleteFile(toDelete, 0).then(status => {
          this.setState({ progress: 1 });
          this.finishSync(version);
        });
      }
    });
  }

  async getToDL(docs, i, toDL = []) {
    if (docs.length < 1) {
      return toDL;
    }
    const item = docs[i];
    const { exists, modificationTime } = await FileSystem.getInfoAsync(
      FileSystem.documentDirectory + item.uuid + '.' + item.type,
    );
    if (exists === false) {
      toDL.push(item);
    } else {
      if (modificationTime.toString() !== item.updated_at) {
        toDL.push(item);
      }
    }
    if (i < docs.length - 1) {
      return this.getToDL(docs, i + 1, toDL);
    }
    return toDL;
  }

  async deleteFile(docs, i) {
    if (docs.length > 0) {
      const file = docs[i];
      await FileSystem.deleteAsync(
        FileSystem.documentDirectory + file.uuid + '.' + file.type,
        { idempotent: true },
      );
      if (i < docs.length - 1) {
        return this.deleteFile(docs, i + 1);
      }
    }
    return true;
  }

  callback(downloadProgress) {
    let progress =
      (downloadProgress.totalBytesWritten /
        downloadProgress.totalBytesExpectedToWrite) *
      100;
    progress = Math.round(progress);
    progress = progress.toString();
    this.setState({
      downloadProgress: progress,
    });
  }

  downloadResumable(url, uuid, type) {
    return FileSystem.createDownloadResumable(
      url,
      FileSystem.documentDirectory + uuid + '.' + type,
      {},
      this.callback.bind(this),
    );
  }

  async download(documents, progress, i) {
    if (this.state.downloadingFile === false) {
      this.setState({ downloadingFile: true });
    }
    const endpoint = SyncController.getUrlBo() + '/storage/docs/';
    const doc = documents[i];
    this.setState({
      txtStep:
        i18n.t('sync_s.download') +
        ' : ' +
        doc.title +
        ' (' +
        doc.type.toUpperCase() +
        ') ...',
    });
    try {
      await this.downloadResumable(
        endpoint + doc.uuid + '.' + doc.type,
        doc.uuid,
        doc.type,
      ).downloadAsync();
      const { modificationTime } = await FileSystem.getInfoAsync(
        FileSystem.documentDirectory + doc.uuid + '.' + doc.type,
      );
      SyncController.updateLastModificationDoc(doc.id, modificationTime);
      //console.log('Finished downloading to ', uri);
      this.setState({ progress: this.state.progress + progress });
      if (i < documents.length - 1) {
        return this.download(documents, progress, i + 1);
      }
      this.setState({ downloadingFile: false });
      return true;
    } catch (e) {
      console.error(e);
      return false;
    }
  }

  finishSync(version) {
    this.props.init();
    this.props.initUsers();
    this.props.initContact(this.props.currentUser);
    this.props.initDirectories(this.props.locale, this.props.currentUser);
    this.props.initDocuments(this.props.locale, this.props.directories.global);
    this.props.initBtns();
    if (this.state.forced) {
      SyncController.setInstalled();
    }
    SyncController.updateVersion(version);
    this.setState({
      txtStep: i18n.t('sync_s.update_completed') + '.',
      processing: false,
    });
    if (this.state.newApp === true) {
      const appUUID = SyncController.getAppStoreUUID();
      const url = 'https://store.ldc.fr' + '/app/' + appUUID;
      Alert.alert(
        'LDC Store',
        i18n.t('sync_s.new_app_version'),
        [
          {
            text: i18n.t('global.cancel'),
            onPress: () => console.log('Cancel Pressed'),
            style: 'cancel',
          },
          {
            text: i18n.t('sync_s.open_store'),
            onPress: () =>
              Linking.openURL(url).catch(err =>
                console.error('An error occurred', err),
              ),
          },
        ],
        { cancelable: false },
      );
    }
  }
}

export default connect(mapStateToProps, mapDispatchToProps)(SyncScreen);