import React, { Component, setState } from 'react';
import { Text, TouchableOpacity, Alert, View, StyleSheet } from 'react-native';
import Voice from '@react-native-community/voice';
import Icon from 'react-native-vector-icons/FontAwesome';
import { tr } from 'date-fns/locale';
import Modal from 'react-native-modalbox';
import { Icons } from '../globals';
import { MapContext } from '../contexts/MapContext'
import RNLocation from 'react-native-location';
import { alternatives } from 'joi';

class VoiceView extends Component {
    static contextType = MapContext;

    constructor(props) {
        super(props);
        Voice.onSpeechStart = this.onSpeechStart;
        Voice.onSpeechResults = this.onSpeechResults;
        Voice.onSpeechRecognized = this.onSpeechRecognized;
        Voice.onSpeechPartialResults = this.onSpeechPartialResults;
        Voice.onSpeechError = this.onSpeechError;
        Voice.onSpeechEnd = this.onSpeechEnd;
        this.modalRef = React.createRef();
        this.state = {
            recognized: false,
            started: false,
            ended: false,
            actionText: '',
            action: null,
            results: [],
            partialResults: [],
            error: ''
        }
    }

    addLandmark = (type) => {
        this.modalRef.current.close();
        console.log(this.context.mapState.location.latitude)
        console.log(this.context.mapState.location.longitude)
        this.props.changeSelectedLandmark({icon: type, title: 'New landmark', latitude: this.context.mapState.location.latitude, longitude: this.context.mapState.location.longitude,});
        this.props.editLandmark();
    }

    open() {
        this.modalRef.current.open();
        this._startRecognizing();
    }

    close() {
        this.modalRef.current.close();
        this._stopRecognizing();
    }

    stop() {
        this._stopRecognizing()
    }

    componentWillUnmount() {
        this._stopRecognizing();
    }
        
    onSpeechStart = (e) => {
        this.setState({
            started: true
        });
    };

    onSpeechRecognized = (e) => {
        this.setState({
            recognized: true
        });
    };

    onSpeechResults = (e) => {
        this.setState({
            results: e.value
        });
        let requestedAction = '';
        if ((e.value[0].includes("add") || e.value[0].includes("ad") || e.value[0].includes("had"))) {
            if (e.value[0].includes('landmark')) {
                requestedAction = 'Add Landmark'    
                this.state.action = () => this.addLandmark();
            }
            if (Object.keys(Icons).some(icon => {return e.value[0].includes(icon)})) {
                const requestedTypes = Object.keys(Icons).filter(icon => {return e.value[0].includes(icon)})
                requestedAction = 'Add ' + requestedTypes[0].toString();
                this.state.action = () => this.addLandmark(requestedTypes[0]);
            }
            if (e.value[0].includes('road') && e.value[0].includes('block')) {
                requestedAction = 'Add ' + 'roadblock';
                this.state.action = () => this.addLandmark('roadblock');
            }
        }
        if (e.value) {
            
        }
        this.setState({
            actionText: requestedAction
        });
    };

    onSpeechPartialResults = (e) => {
        this.setState({
            partialResults: e.value
        });
    };

    onSpeechError = (e) => {
        this.setState({
            error: e.value
        })
    };

    onSpeechEnd = (e) => {
        this.setState({
            ended: true
        })
    }

    _startRecognizing = async (e) => {
        this.setState({
            started: false,
            ended: false,
            recognized: false,
            error: '',
            results: [],
            partialResults: [],
        })

        try {
            await Voice.start('en-US')
        } catch (error) {
        }
    }

    _stopRecognizing = async (e) => {
        Voice.destroy().then(Voice.removeAllListeners);
    }

    render() {
        return (
            <Modal position='bottom' style={styles.voiceModal} ref={this.modalRef} onClosed={() => Voice.destroy().then(Voice.removeAllListeners)}>
                <TouchableOpacity style={{alignSelf: 'flex-end', margin: 10}} onPress={() => this.modalRef.current.close()}><Icon size={20} color='white' name='times'/></TouchableOpacity>
                {this.state.started && !this.state.ended ? <Text style={{fontSize: 20, margin: 20, color: 'white'}}>Listening...</Text> : null}
                {this.state.results.length ? <Text style={{fontSize: 20, margin: 20, color: 'white'}}>We heard: {this.state.results[0]}</Text> : null}
                {this.state.partialResults.length > 0 && !this.state.ended ? <Text style={{fontSize: 15, marginHorizontal: 20, color: 'white'}}>{this.state.partialResults[0]}</Text> : null}
                {this.state.ended ? 
                <View style={styles.btnContainer}>
                    <TouchableOpacity onPress={this._startRecognizing}><Icon size={20} color='white' name='refresh'/></TouchableOpacity>
                    {this.state.actionText ? 
                    <TouchableOpacity onPress={this.state.action}><Text style={{color: 'white', fontSize: 20}}>{this.state.actionText} - Confirm?</Text></TouchableOpacity> : 
                    <Text style={{fontSize: 20,color: 'white'}}>No valid action was percieved.</Text>}
                </View>
                : null}
            </Modal>
        )
    }
}

const styles = StyleSheet.create({
    voiceModal: {
        backgroundColor: '#df3f3f',
        height: 200,
    },
    btnContainer: {
        paddingTop: 20,
        borderTopWidth: 1,
        borderColor: 'lightgrey',
        flexDirection: 'row', 
        justifyContent: 'space-between', 
        alignItems: 'center',
        position: 'absolute',
        width: 300,
        bottom: 30,
        right: 30,
    }
})

export default VoiceView;