import React, {Component} from 'react';
import axios from 'axios';
import styles from './App.css';
import Box from './components/UI/Box/Box';
import Configuration from './containers/Configuration/Configuration';
import CSSModules from 'react-css-modules';
import DependencyList from './components/DependencyList/DependencyList';
import DownloadProgress from './components/DownloadProgress/DownloadProgress';
import ErrorDetails from './components/ErrorDetails/ErrorDetails';
import Grid from './components/UI/Grid/Grid';
import Loading from './components/UI/Loading/Loading';
import Modal from './components/UI/Modal/Modal';
import MountItems from './containers/MountItems/MountItems';
import ReleaseVersionDisplay from './components/ReleaseVersionDisplay/ReleaseVersionDisplay';
import Text from './components/UI/Text/Text';
import UpgradeIcon from './components/UpgradeIcon/UpgradeIcon';
import UpgradeUI from './components/UpgradeUI/UpgradeUI';

const Constants = require('./constants');
const Scheduler = require('node-schedule');

let ipcRenderer = null;
if (!process.versions.hasOwnProperty('electron')) {
  ipcRenderer = ((window && window.require) ? window.require('electron').ipcRenderer : null);
}

class App extends Component {
  constructor(props) {
    super(props);

    if (ipcRenderer) {
      ipcRenderer.on(Constants.IPC_Check_Installed_Reply, this.onCheckInstalledReply);
      ipcRenderer.on(Constants.IPC_Download_File_Complete, this.onDownloadFileComplete);
      ipcRenderer.on(Constants.IPC_Download_File_Progress, this.onDownloadFileProgress);
      ipcRenderer.on(Constants.IPC_Extract_Release_Complete, this.onExtractReleaseComplete);
      ipcRenderer.on(Constants.IPC_Get_State_Reply, this.onGetStateReply);
      ipcRenderer.on(Constants.IPC_Grab_Releases_Reply, this.onGrabReleasesReply);
      ipcRenderer.on(Constants.IPC_Grab_UI_Releases_Reply, this.onGrabUiReleasesReply);
      ipcRenderer.on(Constants.IPC_Install_Dependency_Reply, this.onInstallDependencyReply);
      ipcRenderer.on(Constants.IPC_Install_Upgrade_Reply, this.onInstallUpgradeReply);

      ipcRenderer.send(Constants.IPC_Get_State, Constants.DATA_LOCATIONS[this.props.platform]);
      Scheduler.scheduleJob('23 11 * * *', this.updateCheckScheduledJob);
    }
  }

  state = {
    AllowDownload: false,
    AutoMountProcessed: false,
    ConfigStorageType: null,
    DisplayError: false,
    DisplayMainContent: false,
    Error: null,
    ErrorAction: null,
    ErrorCritical: false,
    DownloadActive: false,
    DownloadProgress: 0.0,
    DownloadingDependency: false,
    DownloadName: '',
    DownloadingRelease: false,
    DownloadingUpgrade: false,
    ExtractActive: false,
    Hyperspace: {
      AutoMount: false,
      MountLocation: '',
    },
    LocationsLookup: {},
    MissingDependencies: [],
    MountsBusy: false,
    Platform: 'unknown',
    Release: 3,
    ReleaseTypes: [
      'Release',   
      'RC',
      'Beta',
      'Alpha',
    ],
    InstalledVersion: 'none',
    Sia: {
      AutoMount: false,
      MountLocation: '',
    },
    UpgradeAvailable: false,
    UpgradeData: {},
    UpgradeDismissed: false,
    Version: -1,
    VersionAvailable: false,
    VersionLookup: {
      Alpha: [
        'unavailable'
      ],
      Beta: [
        'unavailable'
      ],
      RC: [
        'unavailable'
      ],
      Release: [
        'unavailable'
      ],
    }
  };

  checkVersionInstalled = (release, version, versionLookup) => {
    if (!versionLookup) {
      versionLookup = this.state.VersionLookup;
    }

    const selectedVersion = versionLookup[this.state.ReleaseTypes[release]][version];
    this.setState({
      AllowDownload: false,
    });

    if (selectedVersion !== 'unavailable') {
      if (ipcRenderer) {
        let dependencies = [];
        if (this.state.LocationsLookup[selectedVersion] && this.state.LocationsLookup[selectedVersion].dependencies) {
          dependencies = this.state.LocationsLookup[selectedVersion].dependencies;
        }

        ipcRenderer.send(Constants.IPC_Check_Installed, {
          Dependencies: dependencies,
          Directory: Constants.DATA_LOCATIONS[this.props.platform],
          Version: selectedVersion,
        });
      }
    }
  };

  closeErrorDisplay = () => {
    if (this.state.ErrorAction) {
      this.state.ErrorAction();
    }

    if (this.state.ErrorCritical) {
      if (ipcRenderer) {
        ipcRenderer.send(Constants.IPC_Shutdown);
      }
    } else {
      this.setState({
        DisplayError: false,
        Error: null,
      });
    }
  };

  componentWillUnmount = () => {
    if (ipcRenderer) {
      ipcRenderer.removeListener(Constants.IPC_Check_Installed_Reply, this.onCheckInstalledReply);
      ipcRenderer.removeListener(Constants.IPC_Download_File_Complete, this.onDownloadFileComplete);
      ipcRenderer.removeListener(Constants.IPC_Download_File_Progress, this.onDownloadFileProgress);
      ipcRenderer.removeListener(Constants.IPC_Extract_Release_Complete, this.onExtractReleaseComplete);
      ipcRenderer.removeListener(Constants.IPC_Get_State_Reply, this.onGetStateReply);
      ipcRenderer.removeListener(Constants.IPC_Grab_Releases_Reply, this.onGrabReleasesReply);
      ipcRenderer.removeListener(Constants.IPC_Grab_UI_Releases_Reply, this.onGrabUiReleasesReply);
      ipcRenderer.removeListener(Constants.IPC_Install_Dependency_Reply, this.onInstallDependencyReply);
      ipcRenderer.removeListener(Constants.IPC_Install_Upgrade_Reply, this.onInstallUpgradeReply);
    }  
  };

  grabReleases = () => {
    if (this.props.platform !== 'unknown') {
      if (ipcRenderer) {
        ipcRenderer.send(Constants.IPC_Grab_Releases);
        ipcRenderer.send(Constants.IPC_Grab_UI_Releases);
      }
    }
  };

  handleAutoMountChanged = (storageType, e) => {
    let sia = {
      ...this.state.Sia
    };

    let hyperspace = {
      ...this.state.Hyperspace
    };

    if (storageType === 'Hyperspace') {
      hyperspace.AutoMount = e.target.checked;
      this.setState({
        Hyperspace: hyperspace,
      });
    } else if (storageType === 'Sia') {
      sia.AutoMount = e.target.checked;
      this.setState({
        Sia: sia,
      });
    }

    this.saveState(this.state.Release, this.state.Version, sia, hyperspace);
  };

  handleConfigClicked = (storageType) => {
    this.setState({
      ConfigStorageType: storageType,
    })
  };

  handleConfigClosed = () => {
    this.setState({
      ConfigStorageType: null,
    });
  };

  handleDependencyDownload = (url) => {
    if (ipcRenderer) {
      const items = url.split('/');
      const fileName = items[items.length - 1];

      this.setState({
        DownloadActive: true,
        DownloadingDependency: true,
        DownloadName: fileName,
      });

      ipcRenderer.send(Constants.IPC_Download_File, {
        Directory: Constants.DATA_LOCATIONS[this.props.platform],
        Filename: fileName,
        URL: url,
      });
    }
  };

  handleMountLocationChanged = (storageType, location) => {
    const state = {
      ...this.state[storageType],
      MountLocation: location,
    };
    this.setState({
      [storageType]: state,
    });
    const hyperspace = (storageType === 'Hyperspace') ? state : {
      ...this.state.Hyperspace,
    };
    const sia = storageType === 'Sia' ? state : {
      ...this.state.Sia,
    };

    this.saveState(this.state.Release, this.state.Version, sia, hyperspace);
  };

  handleReleaseChanged = (e) => {
    const val = parseInt(e.target.value, 10);
    const versionIndex = this.state.VersionLookup[this.state.ReleaseTypes[val]].length - 1;
    this.setState({
      Release: val,
      Version: versionIndex
    });
    this.saveState(val, versionIndex, this.state.Sia, this.state.Hyperspace);
    this.checkVersionInstalled(val, versionIndex);
  };

  handleReleaseDownload = () => {
    const selectedVersion = this.state.VersionLookup[this.state.ReleaseTypes[this.state.Release]][this.state.Version];
    const fileName = selectedVersion + '.zip';
    if (ipcRenderer) {
      this.setState({
        DownloadActive: true,
        DownloadingRelease: true,
        DownloadName: fileName,
      });

      ipcRenderer.send(Constants.IPC_Download_File, {
        Directory: Constants.DATA_LOCATIONS[this.props.platform],
        Filename: fileName,
        URL: this.state.LocationsLookup[selectedVersion].urls[0],
      });
    }
  };

  handleUIDownload = () => {
    if (ipcRenderer) {
      this.setState({
        DownloadActive: true,
        DownloadingUpgrade: true,
        DownloadName: 'UI Upgrade',
      });

      ipcRenderer.send(Constants.IPC_Download_File, {
        Directory: Constants.DATA_LOCATIONS[this.props.platform],
        Filename: this.props.platform === 'win32' ? 'upgrade.exe' : 'upgrade',
        URL: this.state.UpgradeData.urls[0],
      });
    } else {
      this.setState({UpgradeDismissed: true});
    }
  };

  handleVersionChanged = (e) => {
    const val = parseInt(e.target.value, 10);
    this.setState({
      Version: val
    });
    this.saveState(this.state.Release, val, this.state.Sia, this.state.Hyperspace);
    this.checkVersionInstalled(this.state.Release, val);
  };

  notifyAutoMountProcessed = () => {
    this.setState({AutoMountProcessed: true});
  };

  notifyMountsBusy = (busy) => {
    this.setState({MountsBusy: busy})
  };

  onCheckInstalledReply = (event, arg) => {
    const action = () => {
      const installedVersion = arg.data.Success && arg.data.Exists ? arg.data.Version : 'none';
      let versionAvailable = false;

      if (installedVersion !== 'none') {
        const latestVersion = this.state.VersionLookup[this.state.ReleaseTypes[this.state.Release]].length - 1;
        let version = this.state.Version;
        if (version === -1) {
          version = latestVersion;
        }
        versionAvailable = version !== latestVersion;
      }

      this.setState({
        AllowDownload: true,
        DownloadingDependency: false,
        MissingDependencies: arg.data.Dependencies,
        InstalledVersion: installedVersion,
        VersionAvailable: versionAvailable,
      });
    };

    if (arg.data.Success) {
      action();
    } else {
      this.setErrorState(arg.data.Error, action);
    }
  };
  
  onDownloadFileComplete = (event, arg) => {
    if (this.state.DownloadingRelease) {
      if (arg.data.Success) {
        const selectedVersion = this.state.VersionLookup[this.state.ReleaseTypes[this.state.Release]][this.state.Version];
        ipcRenderer.send(Constants.IPC_Extract_Release, {
          Directory: Constants.DATA_LOCATIONS[this.props.platform],
          Source: arg.data.Destination,
          Version: selectedVersion,
        });
      }

      this.setState({
        DownloadActive: false,
        DownloadProgress: 0.0,
        DownloadingRelease: false,
        ExtractActive: arg.data.Success,
        DownloadName: '',
      });
    } else if (this.state.DownloadingDependency) {
      if (arg.data.Success) {
        ipcRenderer.send(Constants.IPC_Install_Dependency, {
          Source: arg.data.Destination,
        });
      }

      this.setState({
        DownloadActive: false,
        DownloadProgress: 0.0,
        DownloadingDependency: arg.data.Success,
        DownloadName: '',
      });
    } else if (this.state.DownloadingUpgrade) {
      if (arg.data.Success) {
        ipcRenderer.send(Constants.IPC_Install_Upgrade, {
          Source: arg.data.Destination,
        });
      } else {
        this.setState({
          DownloadActive: false,
          DownloadProgress: 0.0,
          DownloadingUpgrade: false,
          DownloadName: '',
        });
      }
    } else {
      this.setState({
        DownloadActive: false,
        DownloadProgress: 0.0,
        DownloadName: '',
      });
    }
  };
  
  onDownloadFileProgress = (event, arg) => {
    this.setState({
      DownloadProgress: arg.data.Progress,
    });
  };
  
  onExtractReleaseComplete = (event, arg) => {
    ipcRenderer.send(Constants.IPC_Delete_File, {
      FilePath: arg.data.Source,
    });

    this.setState({
      ExtractActive: false,
    });
    this.checkVersionInstalled(this.state.Release, this.state.Version);
  };
  
  onGetStateReply = (event, arg) => {
    if (arg.data) {
      if (arg.data.Hyperspace.AutoMount === undefined) {
        arg.data.Hyperspace['AutoMount'] = false;
      }
      if (arg.data.Sia.AutoMount === undefined) {
        arg.data.Sia['AutoMount'] = false;
      }
      this.setState({
        Hyperspace: arg.data.Hyperspace,
        Release: arg.data.Release,
        Sia: arg.data.Sia,
        Version: arg.data.Version,
      });
    }
    this.grabReleases();
  };
  
  onGrabReleasesReply = ()=> {
    const doUpdate = (locationsLookup, versionLookup) => {
      const latestVersion = versionLookup[this.state.ReleaseTypes[this.state.Release]].length - 1;
      let version = this.state.Version;
      if ((version === -1) || !versionLookup[this.state.ReleaseTypes[this.state.Release]][version]) {
        version = latestVersion;
        this.saveState(this.state.Release, version, this.state.Sia, this.state.Hyperspace);
      }

      this.setState({
        DisplayMainContent: true,
        LocationsLookup: locationsLookup,
        Version: version,
        VersionAvailable: version !== latestVersion,
        VersionLookup: versionLookup,
      });

      this.checkVersionInstalled(this.state.Release, version, versionLookup);
    };

    axios.get(Constants.RELEASES_URL)
    .then(response => {
      const versionLookup = {
        Alpha: response.data.Versions.Alpha[this.props.platform],
        Beta: response.data.Versions.Beta[this.props.platform],
        RC: response.data.Versions.RC[this.props.platform],
        Release: response.data.Versions.Release[this.props.platform],
      };
      const locationsLookup = {
        ...response.data.Locations[this.props.platform],
      };

      window.localStorage.setItem('releases', JSON.stringify({
        LocationsLookup: locationsLookup,
        VersionLookup: versionLookup
      }));

      doUpdate(locationsLookup, versionLookup);
    }).catch(error => {
      const releases = window.localStorage.getItem('releases');
      if (releases && (releases.length > 0)) {
        const obj = JSON.parse(releases);
        const locationsLookup = obj.LocationsLookup;
        const versionLookup = obj.VersionLookup;

        doUpdate(locationsLookup, versionLookup);
      } else {
        this.setErrorState(error, null, true);
      }
    });
  };
  
  onGrabUiReleasesReply = ()=> {
    axios.get(Constants.UI_RELEASES_URL)
    .then(response => {
      const data = response.data;
      if (data.Versions &&
        data.Versions[this.props.platform] &&
        (data.Versions[this.props.platform].length > 0) &&
        (data.Versions[this.props.platform][0] !== this.props.version)) {
        this.setState({
          UpgradeAvailable: true,
          UpgradeDismissed: false,
          UpgradeData: data.Locations[this.props.platform][data.Versions[this.props.platform][0]],
        });
      }
    }).catch(() => {
      this.setState({
        UpgradeAvailable: false,
        UpgradeData: {},
      });
    });
  };
  
  onInstallDependencyReply = (event, arg) => {
    ipcRenderer.send(Constants.IPC_Delete_File, {
      FilePath: arg.data.Source,
    });
    this.checkVersionInstalled(this.state.Release, this.state.Version);
  };
  
  onInstallUpgradeReply = (event, arg) => {
    ipcRenderer.sendSync(Constants.IPC_Delete_File, {
      FilePath: arg.data.Source,
    });

    this.setState({
      DownloadActive: false,
      DownloadProgress: 0.0,
      DownloadName: '',
    });
  };
  
  saveState = (release, version, sia, hyperspace)=> {
    if (ipcRenderer) {
      ipcRenderer.send(Constants.IPC_Save_State, {
        Directory: Constants.DATA_LOCATIONS[this.props.platform],
        State: {
          Hyperspace: hyperspace,
          Release: release,
          Sia: sia,
          Version: version,
        }
      });
    }
  };

  setErrorState = (error, action, critical) => {
    this.setState({
      DisplayError: true,
      Error: error,
      ErrorAction: action,
      ErrorCritical: critical,
    });
  };

  updateCheckScheduledJob = () => {
    if (this.props.platform !== 'unknown') {
      this.grabReleases();
    }
  };

  render() {
    const selectedVersion = (this.state.Version === -1) ?
      'unavailable' :
      this.state.VersionLookup[this.state.ReleaseTypes[this.state.Release]][this.state.Version];

    const downloadEnabled = this.state.AllowDownload &&
      !this.state.MountsBusy &&
      !this.state.DownloadActive &&
      (selectedVersion !== 'unavailable') &&
      (selectedVersion !== this.state.InstalledVersion);

    const allowMount = this.state.InstalledVersion !== 'none';
    const missingDependencies = (this.state.MissingDependencies.length > 0);
    const allowConfig = this.state.LocationsLookup[selectedVersion] &&
      this.state.LocationsLookup[selectedVersion].config_support;

    const showDependencies = missingDependencies &&
      !this.state.DownloadActive;

    const showConfig = !missingDependencies &&
      this.state.ConfigStorageType &&
      allowConfig;

    const showUpgrade = this.state.UpgradeAvailable &&
      !this.state.DisplayError &&
      !showConfig &&
      !missingDependencies &&
      !this.state.DownloadActive &&
      !this.state.UpgradeDismissed;

    let errorDisplay = null;
    if (this.state.DisplayError) {
      errorDisplay = (
        <Modal critical>
          <ErrorDetails closed={this.closeErrorDisplay}
                        critical={this.state.ErrorCritical}
                        error={this.state.Error}/>
        </Modal>
      );
    }

    let configDisplay = null;
    if (showConfig) {
      configDisplay = (
        <Modal>
          <Configuration closed={this.handleConfigClosed}
                         directory={Constants.DATA_LOCATIONS[this.props.platform]}
                         errorHandler={this.setErrorState}
                         storageType={this.state.ConfigStorageType}
                         version={selectedVersion} />
        </Modal>
      );
    }

    let dependencyDisplay = null;
    if (showDependencies) {
      dependencyDisplay = (
        <Modal>
          <DependencyList allowDownload={!this.state.DownloadingDependency}
                          dependencies={this.state.MissingDependencies}
                          onDownload={this.handleDependencyDownload}/>
        }
        </Modal>
      )
    }

    let downloadDisplay = null;
    if (this.state.DownloadActive) {
      downloadDisplay = (
        <Modal>
          <DownloadProgress display={this.state.DownloadName}
                            progress={this.state.DownloadProgress}/>
        </Modal>);
    }

    let upgradeDisplay = null;
    if (showUpgrade) {
      upgradeDisplay = (
        <Modal>
          <UpgradeUI cancel={()=>this.setState({UpgradeDismissed: true})}
                     upgrade={this.handleUIDownload}/>
        </Modal>
      );
    }

    let mainContent = [];
    if (this.state.DisplayMainContent) {
      let key = 0;
      mainContent.push((
        <div key={'rvd_' + key++}
             style={{height: '40%'}}>
          <ReleaseVersionDisplay disabled={this.state.DownloadActive || this.state.ExtractActive || this.state.MountsBusy}
                                 downloadClicked={this.handleReleaseDownload}
                                 downloadDisabled={!downloadEnabled}
                                 installedVersion={this.state.InstalledVersion}
                                 release={this.state.Release}
                                 releaseChanged={this.handleReleaseChanged}
                                 releaseExtracting={this.state.ExtractActive}
                                 releaseTypes={this.state.ReleaseTypes}
                                 version={this.state.Version}
                                 versionAvailable={this.state.VersionAvailable}
                                 versionChanged={this.handleVersionChanged}
                                 versions={this.state.VersionLookup[this.state.ReleaseTypes[this.state.Release]]}/>
        </div>
      ));

      if (allowMount) {
        mainContent.push((
          <div key={'md_' + key++}
               style={{height: '60%'}}>
            <MountItems allowConfig={allowConfig}
                        autoMountChanged={this.handleAutoMountChanged}
                        autoMountProcessed={this.notifyAutoMountProcessed}
                        changed={this.handleMountLocationChanged}
                        configClicked={this.handleConfigClicked}
                        directory={Constants.DATA_LOCATIONS[this.props.platform]}
                        errorHandler={this.setErrorState}
                        hyperspace={this.state.Hyperspace}
                        mountsBusy={this.notifyMountsBusy}
                        platform={this.props.platform}
                        processAutoMount={!this.state.AutoMountProcessed}
                        sia={this.state.Sia}
                        version={this.state.InstalledVersion}/>
          </div>
        ));
      }
    } else {
      mainContent = <Loading/>
    }

    return (
      <div styleName='App'>
        {errorDisplay}
        {dependencyDisplay}
        {upgradeDisplay}
        {downloadDisplay}
        {configDisplay}
        <div styleName='Container'>
          <div styleName='Header'>
            <Box>
              <Grid>
                <Text col={0}
                      colSpan={'remain'}
                      row={0}
                      rowSpan={'remain'}
                      text={'Repertory UI v' + this.props.version}
                      textAlign={'center'}
                      type={'Heading1'}/>
                <UpgradeIcon
                  available={this.state.UpgradeAvailable}
                  clicked={()=>this.setState({UpgradeDismissed: false})}
                  col={dimensions => dimensions.columns - 6}
                  colSpan={5}
                  row={1}
                  rowSpan={remain=>remain - 2}/>
              </Grid>
            </Box>
          </div>
          <div styleName='Content'>
            <Box dxStyle={{padding: '8px'}}>
              {mainContent}
            </Box>
          </div>
        </div>
      </div>
    );
  }
}

export default CSSModules(App, styles, {allowMultiple: true});