import React from 'react';
import {Component} from 'react';
import CSSModules from 'react-css-modules';
import styles from './MountItems.css';
import MountItem from '../../components/MountItem/MountItem';

const Constants = require('../../constants');

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

class MountItems extends Component {
  constructor(props) {
    super(props);
    if (ipcRenderer) {
      ipcRenderer.on(Constants.IPC_Detect_Mounts_Reply, this.onDetectMountsReply);
      ipcRenderer.on(Constants.IPC_Mount_Drive_Reply, this.onMountDriveReply);
      ipcRenderer.on(Constants.IPC_Unmount_Drive_Reply, this.onUnmountDriveReply);

      this.detectMounts();
    }
  }

  state = {
    Hyperspace: {
      AllowMount: false,
      DriveLetters: [],
      Mounted: false,
      PID: -1,
    },
    Sia: {
      AllowMount: false,
      DriveLetters: [],
      Mounted: false,
      PID: -1,
    },
    SiaPrime: {
      AllowMount: false,
      DriveLetters: [],
      Mounted: false,
      PID: -1,
    },
  };

  componentWillUnmount = () => {
    if (ipcRenderer) {
      ipcRenderer.removeListener(Constants.IPC_Detect_Mounts_Reply, this.onDetectMountsReply);
      ipcRenderer.removeListener(Constants.IPC_Mount_Drive_Reply, this.onMountDriveReply);
      ipcRenderer.removeListener(Constants.IPC_Unmount_Drive_Reply, this.onUnmountDriveReply);
    }
  };

  detectMounts = ()=> {
    this.props.mountsBusy(true);
    ipcRenderer.send(Constants.IPC_Detect_Mounts, {
      Directory: this.props.directory,
      Version: this.props.version,
    });
  };

  handleMountLocationChanged = (systemType, value) => {
    if (this.props.platform === 'win32') {
      this.props.changed(systemType, this.state[systemType].DriveLetters[value]);
    }
    else {
      this.props.changed(systemType, value);
    }
  };

  handleMountUnMount = (storageType, mount, location, pid) => {
    if (ipcRenderer) {
      const state = {
        ...this.state[storageType],
        AllowMount: false,
      };

      this.props.mountsBusy(true);

      this.setState({
        [storageType]: state,
      }, ()=> {
        if (mount) {
          ipcRenderer.send(Constants.IPC_Mount_Drive, {
            Directory: this.props.directory,
            Location: location,
            StorageType: storageType,
            Version: this.props.version,
          });
        } else {
          ipcRenderer.send(Constants.IPC_Unmount_Drive, {
            Directory: this.props.directory,
            Location: location,
            PID: pid,
            StorageType: storageType,
            Version: this.props.version,
          });
        }
      });
    }
  };

  onDetectMountsReply = (event, arg) => {
    if (arg.data.Success) {
      const sia = {
        ...this.state.Sia,
        AllowMount: true,
        DriveLetters: (arg.data.DriveLetters.Sia),
        Mounted: (arg.data.Locations.Sia.length > 0),
        PID: arg.data.PIDS.Sia,
      };
      const siaPrime = {
        ...this.state.SiaPrime,
        AllowMount: true,
        DriveLetters: (arg.data.DriveLetters.SiaPrime),
        Mounted: (arg.data.Locations.SiaPrime.length > 0),
        PID: arg.data.PIDS.SiaPrime,
      };
      const hs = {
        ...this.state.Hyperspace,
        AllowMount: true,
        DriveLetters: (arg.data.DriveLetters.Hyperspace),
        Mounted: (arg.data.Locations.Hyperspace.length > 0),
        PID: arg.data.PIDS.Hyperspace,
      };

      this.props.mountsBusy(hs.Mounted || sia.Mounted);

      this.setState({
        Hyperspace: hs,
        Sia: sia,
        SiaPrime: siaPrime,
      }, () => {
        let hsLocation = arg.data.Locations.Hyperspace;
        if ((hsLocation.length === 0) && (this.props.platform === 'win32')) {
          hsLocation = this.props.hyperspace.MountLocation || arg.data.DriveLetters.Hyperspace[0];
        }
        if (hsLocation !== this.props.hyperspace.MountLocation) {
          this.props.changed('Hyperspace', hsLocation);
        }

        let siaLocation = arg.data.Locations.Sia;
        if ((siaLocation.length === 0) && (this.props.platform === 'win32')) {
          siaLocation = this.props.sia.MountLocation || arg.data.DriveLetters.Sia[0];
        }
        if (siaLocation !== this.props.sia.MountLocation) {
          this.props.changed('Sia', siaLocation);
        }

        let siaPrimeLocation = arg.data.Locations.SiaPrime;
        if ((siaPrimeLocation.length === 0) && (this.props.platform === 'win32')) {
          siaPrimeLocation = this.props.siaprime.MountLocation || arg.data.DriveLetters.SiaPrime[0];
        }
        if (siaPrimeLocation !== this.props.siaprime.MountLocation) {
          this.props.changed('SiaPrime', siaPrimeLocation);
        }

        this.performAutoMount();
      });
    } else {
      this.props.errorHandler(arg.data.Error);
    }
  };

  onMountDriveReply = (event, arg) => {
    const state = {
      ...this.state[arg.data.StorageType],
      PID: arg.data.PID,
      Mounted: arg.data.Success,
    };
    this.setState({
      [arg.data.StorageType]: state,
    }, ()=> {
      this.detectMounts();
    });
  };

  onUnmountDriveReply = (event, arg) => {
    this.detectMounts();
  };

  performAutoMount = ()=> {
    if (this.props.processAutoMount) {
      this.props.autoMountProcessed();
      if (this.props.hyperspace.AutoMount &&
        !this.state.Hyperspace.Mounted &&
        (this.props.hyperspace.MountLocation.length > 0)) {
        this.handleMountUnMount('Hyperspace', true, this.props.hyperspace.MountLocation);
      }
      if (this.props.sia.AutoMount &&
        !this.state.Sia.Mounted &&
        (this.props.sia.MountLocation.length > 0)) {
        this.handleMountUnMount('Sia', true, this.props.sia.MountLocation);
      }
      if (this.props.siaprime.AutoMount &&
        !this.state.SiaPrime.Mounted &&
        (this.props.siaprime.MountLocation.length > 0)) {
        this.handleMountUnMount('SiaPrime', true, this.props.siaprime.MountLocation);
      }
    }
  };

  render() {
    return (
      <div styleName='MountItems'>
        <MountItem allowConfig={this.props.allowConfig}
                   allowMount={this.state.Hyperspace.AllowMount}
                   autoMount={this.props.hyperspace.AutoMount}
                   autoMountChanged={(e)=>this.props.autoMountChanged('Hyperspace', e)}
                   changed={(e) => this.handleMountLocationChanged('Hyperspace', e.target.value)}
                   clicked={this.handleMountUnMount}
                   configClicked={()=>this.props.configClicked('Hyperspace')}
                   items={this.state.Hyperspace.DriveLetters}
                   location={this.props.hyperspace.MountLocation}
                   mounted={this.state.Hyperspace.Mounted}
                   pid={this.state.Hyperspace.PID}
                   platform={this.props.platform}
                   title={'Hyperspace'}/>
        <div style={{paddingTop: '8px'}}/>
        <MountItem allowConfig={this.props.allowConfig}
                   allowMount={this.state.Sia.AllowMount}
                   autoMount={this.props.sia.AutoMount}
                   autoMountChanged={(e)=>this.props.autoMountChanged('Sia', e)}
                   changed={(e) => this.handleMountLocationChanged('Sia', e.target.value)}
                   clicked={this.handleMountUnMount}
                   configClicked={()=>this.props.configClicked('Sia')}
                   items={this.state.Sia.DriveLetters}
                   location={this.props.sia.MountLocation}
                   mounted={this.state.Sia.Mounted}
                   pid={this.state.Sia.PID}
                   platform={this.props.platform}
                   title={'Sia'}/>
        <div style={{paddingTop: '8px'}}/>
        <MountItem allowConfig={this.props.allowConfig}
                   allowMount={this.state.Sia.AllowMount}
                   autoMount={this.props.siaprime.AutoMount}
                   autoMountChanged={(e)=>this.props.autoMountChanged('SiaPrime', e)}
                   changed={(e) => this.handleMountLocationChanged('SiaPrime', e.target.value)}
                   clicked={this.handleMountUnMount}
                   configClicked={()=>this.props.configClicked('SiaPrime')}
                   items={this.state.SiaPrime.DriveLetters}
                   location={this.props.siaprime.MountLocation}
                   mounted={this.state.SiaPrime.Mounted}
                   pid={this.state.SiaPrime.PID}
                   platform={this.props.platform}
                   title={'SiaPrime'}/>
      </div>);
  }
}

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