# All files / atlas-mobile-ts/src/components/Map/Panels VoicePanel.tsx

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     ﻿/* Copyright (C) Click & Push Accessibility, Inc - All Rights Reserved
     * Unauthorized copying of this file, via any medium is strictly prohibited
     * Proprietary and confidential
     * Written and maintained by the Click & Push Development team
     * <dev@clicknpush.ca>, January 2022
     */

    import { FontAwesome } from '@expo/vector-icons';
    import * as Linking from "expo-linking";
    import React, { useEffect, useState } from 'react';
    import { ActivityIndicator, AppState, FlatList, Image, ImageURISource, KeyboardAvoidingView, Text, TouchableOpacity, View, ViewStyle } from 'react-native';
    import { Pulse, Wave } from 'react-native-animated-spinkit';
    import Config from 'react-native-config';
    import Modal from "react-native-modal";
    import { SafeAreaView } from 'react-native-safe-area-context';
    import Spokestack, { PipelineProfile } from 'react-native-spokestack';
    import { Landmark, useLandmarks } from '../../../hooks/useLandmarks';
    import { AuthTabsNavigationProp } from '../../../navigation/AuthorizedNavigator';
    import { colors, GlobalStyles, lmTypes } from '../../../utils/GlobalUtils';
    import { Separator } from '../../Separator';
    import * as Speech from 'expo-speech';

    export interface VoicePanelProps {
        voiceVisible: boolean,
        toggleVoiceVisible: (state: boolean) => void,
        toggleAlertedLandmarksVisible: (state: boolean) => void
        landmarksNearby: boolean,
        newLandmark: Landmark,
        setNewLandmark: (state: Landmark) => void,
        setSelectedLandmarkId: (state: string) => void,
        toggleLmDetails: (state: boolean) => void,
        userCoords: {latitude: number, longitude: number}
        navigation: AuthTabsNavigationProp
    }

    export interface VoiceAction {
        actionType: "Add landmark" | "Filter landmark"
        actionStep: number
    }

    /**
     * Panel that provides UI flows and backend logic for voice activated features. Relies on [Spokestack](https://www.npmjs.com/package/react-native-spokestack).
     * Check the documentation for more information about the Spokestack.initalize(), Spokestack.start(), and Spokestack.activate() and deactivate() methods.
     * A quick summary is as follows:
     * - Spokestack.initialize() -> Prepares the Spokestack service with a given configuration
     * - Spokestack.start() -> Starts the Spokestack service with the configuration given in initialize().
     *   After this method, Spokestack is ready to start recognizing speech, and can now be triggered by wakewords
     * - Spokestack.activate() -> Causes Spokestack to start listening and processing all speech and output the result.
     *   This can be triggered manually or triggered by a wakeword
     * - Spokestack.deactivate() -> Causes Spokestack to stop listening and processing all speech
     * - Spokestack.stop() -> After this method triggers, Spokestack no longer is able to listen for wakewords, or be activated
     * - Spokestack.destroy() -> The Spokestack service is torn down, and must be initialized with initialize() again for Spokestack to be used
     * @param
     * @returns
     */
    export const VoicePanel: React.FC<VoicePanelProps> = ({
            navigation,
            toggleVoiceVisible,
            toggleAlertedLandmarksVisible,
            landmarksNearby,
            voiceVisible,
            newLandmark,
            userCoords,
            setNewLandmark,
            setSelectedLandmarkId}
        ) => {

        // An array of words that will cause the app to stop listening once heard
        const stopResponses = ["cancel", "stop", "goodbye", "bye"]

        // A flag that toggles whether the app is current listening
        const [listening, setListening] = useState<boolean>(false);

        // Holds the value of the intermediate speech results, which update as the user speaks
        const [partialSpeechResult, setPartialSpeechResult] = useState<string>();

        // Holds the value of the final speech results, updates once the user is determined to be finished speaking
        const [speechResult, setSpeechResult] = useState<string>();

        // Holds the value of the previously recognized result, and is displayed to the user for better UX
        const [previousResult, setPreviousResult] = useState<string>();

        // A string that represents a response that app gives to the user once it executes some voice recognition
        const [response, setResponse] = useState<string>();

        // Holds the current action state of a ongoing voice recognition flow
        const [action, setAction] = useState<VoiceAction>();
        const [nearbyLandmarksTrigger, toggleNearbyLandmarksTrigger] = useState<boolean>(false)
        const {addLandmarkAsync, addLandmarkStatus, resetAddLm} = useLandmarks();

        const containsAddVerb = () => {
            return (speechResult.includes("add") || speechResult.includes('create') || speechResult.includes('make'))
        }

        const containsViewVerb = () => {
            return (
                speechResult.includes("view") ||
                speechResult.includes("look") ||
                speechResult.includes("show"))
        }

        const containsNearAdjective = () => {
            return (
                speechResult.includes("near") ||
                speechResult.includes("close"))
        }

        const maybeOpenNearbyLandmarks = () => {
            Iif (nearbyLandmarksTrigger) {
                toggleNearbyLandmarksTrigger(false)
                toggleAlertedLandmarksVisible(true)
            }
        }

        useEffect(() => {
            if (voiceVisible) console.log('[Map]: Voice panel openeing')
            else console.log('[Map]: Voice panel closing')
        }, [voiceVisible])

        useEffect(() => {
            Iif (nearbyLandmarksTrigger) {
                toggleVoiceVisible(false)
            }
        }, [nearbyLandmarksTrigger])

        // Sets up and starts the Spokestack process the first time this component is rendered
        useEffect(() => {
            // Adds handler that will open the app, navigate to the Map screen and open the panel if necessary when Spokestack.activate() is called.
            // Also, listening will be set to true, and speechResult will be reset
            Spokestack.addEventListener('activate', () => {
                console.log('[Voice]: Spokestack activated')
                Iif (!navigation.isFocused()) {
                    navigation.navigate('Map')
                }
                Iif (AppState.currentState != 'active') {
                    Linking.openURL("cnp.mobile://")
                }
                Iif (!voiceVisible) {
                    toggleVoiceVisible(true)
                }
                setSpeechResult('')
                setListening(true)
            });
            // Adds handler that will set listening to false when Spokestack.deactivate() is called
            Spokestack.addEventListener('deactivate', () => {
                console.log('[Voice]: Spokestack deactivated')
                setListening(false)
            })
            // Adds handler that will be called when Spokestack finishes recognizing some speech (once the user stops speaking).
            // Sets speechResult and previousSpeechResult to the processed result
            Spokestack.addEventListener('recognize', ({transcript}) => {
                console.log('[Voice]: Spokestack finished recognizing')
                setPartialSpeechResult('')
                setSpeechResult((transcript as string).trim().toLowerCase())
                setPreviousResult(transcript)
            })
            // Adds handler that will be called when Spokestack recognizes an update to the speech it is currently listening to.
            // Sets partialSpeechResult to the processed result
            Spokestack.addEventListener('partial_recognize', ({transcript}) => {
                console.log('[Voice]: Spokestack recognizing')
                setPartialSpeechResult(transcript)
            })

            Spokestack.initialize(
                'c361ff3a-70c3-42e6-b0ee-0207edd03b18', // account id
                '1A8196594C401EB93035CC6D7D6328CF1855C2B359744E720953AC34B6F658CA', // api token
                {
                    pipeline: {
                        profile: PipelineProfile.TFLITE_WAKEWORD_NATIVE_ASR
                    },
                    wakeword: {
                        detect: 'https://s.spokestack.io/u/kHNUa/detect.tflite',
                        filter: 'https://s.spokestack.io/u/kHNUa/filter.tflite',
                        encode: 'https://s.spokestack.io/u/kHNUa/encode.tflite',
                    },
                }
            ).then(Spokestack.start).catch(error => console.log("[Voice]: Something went wrong when starting spokestack: " +error))

            return () => {
                Spokestack.removeAllListeners();
            };
        }, []);

        useEffect(() => {
            let isMounted = true;
            /**
             * Handles speech result once recognition completes
             */
            const handleSpeechtranscript = async () => {
                // make sure the component is mounted to avoid errors
                Iif (isMounted) {
                    // if the a speech result has been detected, and Spokestack is not currently listening, process that result
                    Iif (speechResult && !listening) {
                        await processSpeechTranscript();
                    }
                    // if there is no speech result has been detected, and Spokestack is not currently listening
                    Iif (!speechResult && !listening) {
                        // if there is no current action, treat it as a timeout and close the voice panel
                        if (!action) {
                            await closeVoice(false);
                        }
                        else {
                            // otherwise give the user another chance to speak
                            setListening(true)
                            await Spokestack.activate()
                        }
                    }
                }
              }
              handleSpeechtranscript()
              return () => {isMounted = false}
        }, [listening])

        /**
         * processes the speech recognition transcript
         */
        const processSpeechTranscript = async () => {
            // stop voice if speech result is one of the stop cases - highest priority
            if (stopResponses.some(response => speechResult.includes(response)) || (speechResult.includes('no') && !action) || (speechResult.includes('back') && !action)) {
                await closeVoice(true);
            }
            // when an action hasn't been initialized yet - discern which action is being requested
            else if (!action) {
                await discernActionRequest()
            }
            // when an action has been initialized - perform the associated action flow
            else if (action) {
                await performActionFlow()
            }
            // handle unrecognized result
            else {
                await Spokestack.activate();
            }
        }

        /**
         * method that initates an appropiate action for the detected action request. it executes when there isn't an action set yet.
         * each initate<ActionName>Action() method will set the action, then setResponse to the user accordingly.
         * once this method has been called, all subsequent transcript will be piped into performActionFlow
         */
        const discernActionRequest = async () => {
            // this branch will initiate whichever action is detected
            if (containsAddVerb() && speechResult.includes("landmark")) {
                await initiateAddLandmarkAction()
            }
            else if (speechResult.includes('near')) {
                await initiateViewNearLandmarksAction()
                return
            }
            else if (speechResult.includes("filter landmarks")) {
                // example action
            }
            // other possible actions

            // handle unrecognized result
            else {
                await respond("Sorry, I don't recognize that command. Try again.")
            }
            await Spokestack.activate()
        }

        // action initiators

        const initiateAddLandmarkAction = async () => {
            setNewLandmark({longitude: userCoords.longitude, latitude: userCoords.latitude})
            setAction({actionType: "Add landmark", actionStep: 1})
            await respond("Could you describe the landmark?")
            await Spokestack.activate();
        }

        const initiateViewNearLandmarksAction = async () => {
            if (landmarksNearby) {
                setAction(undefined)
                toggleNearbyLandmarksTrigger(true)
                await closeVoice(false)
            }
            else {
                await respond("No landmarks nearby")
            }
        }

        // end action initiators

        /**
         * method that performs an appropriate action flow for the currently set action
         */
         const performActionFlow = async () => {
            // add landmark flow
            if (action.actionType == "Add landmark") {
                await performAddLandmarkActionFlow()
            }
            // unrecognized speech
            else {
                await respond("Sorry, I don't recognize that command. Try again.")
            }

            await Spokestack.activate();
        }

    // action flows

        // addLandmark flow

         const performAddLandmarkActionFlow = async () => {
            switch (action.actionStep) {
                case 1:
                    await addLandmarkStep1();
                    break;
                case 2:
                    await addLandmarkStep2();
                    break;
                case 3:
                    await addLandmarkStep3();
                    break;
            }
        }

        const addLandmarkStep1 = async () => {
            if (speechResult == 'back') {
                setAction(undefined);
            }
            else {
                setNewLandmark({...newLandmark, description: speechResult})
                setAction({...action, actionStep: action.actionStep + 1});
                await respond("What type of landmark is it?")
            }
        }

        const addLandmarkStep2 = async () => {
            // get labels of icons from Icons dictionary
            const typeLabels = Object.values(lmTypes).map(icon => icon.label);
            // check if response matches any labels
            const chosenType = typeLabels.filter(label => label.includes(speechResult.toLowerCase()))[0];
            if (speechResult == 'back') {
                setAction({...action, actionStep: action.actionStep - 1})
                await respond("Could you describe the landmark?")
            }
            else if (chosenType.length > 0) {
                const chosenTypeKey = parseInt(Object.keys(lmTypes).find(key => lmTypes[key].label == chosenType));
                // get corrected icon id by getting index of chosen icon type in labels array created above
                setNewLandmark({...newLandmark, landmark_type: chosenTypeKey, title: chosenType[0]})
                setAction({...action, actionStep: action.actionStep + 1});
                await respond("Are you sure you want to add this landmark?")
            }
            else {
                setAction({...action, actionStep: action.actionStep});
                await respond("Sorry. I don't recognize that type of landmark. Please try again.")
            }
        }

        const addLandmarkStep3 = async () => {
            if (speechResult == 'back') {
                setAction({...action, actionStep: action.actionStep - 1})
                await respond("What type of landmark is it?")
            }
            else if (speechResult.includes("yes")) {
                setAction(undefined);
                await addLandmarkAsync({landmarkValue: newLandmark});
                await respond("Great, I've added the landmark. Anything else?")
            }
            else if (speechResult.includes("no")) {
                setAction(undefined);
                await respond("Okay, I didn't add the landmark. Anything else?")
            }
            else {
                setAction({...action, actionStep: 3});
                await respond("Okay, I didn't add the landmark. Anything else?")
            }
        }
        useEffect(() => {
            /**
             * Resets the {@link addLandmarkAsync} mutation, and reports to the user on successful add. Reports error on failure.
             * Embedded in a useEffect that listens to the {@link addLandmarkStatus} value from the {@link useLandmarks} hook.
             * @memberOf AddLandmark
             */
            const finishAddAttempt = async () => {
                if (addLandmarkStatus == 'success') {
                    resetAddLm();
                    setSelectedLandmarkId(newLandmark.id)
                    await Spokestack.activate();
                }
                else Iif (addLandmarkStatus == 'error') {
                    await Spokestack.activate();
                }
            }
            finishAddAttempt();
        }, [addLandmarkStatus]);

        // end add landmark flow

    // end action flows

        const closeVoice = async (sayGoodbye: boolean) => {
            setSpeechResult('')
            setPreviousResult('')
            setResponse('')
            setListening(false)
            setAction(undefined);
            toggleVoiceVisible(false)
            Iif (sayGoodbye) {
                await respond('Goodbye!')
            }
            await Spokestack.deactivate();
        }

        const respond = async (responseSpeech: string) => {
            await Spokestack.deactivate()
            Speech.speak(responseSpeech)
            while (true) {
                Iif (!(await Speech.isSpeakingAsync())) {
                    break;
                }
            }
            await Spokestack.activate()
        }

        const back = async () => {
            setAction({...action, actionStep: action.actionStep - 1})
        }

        const LmTypeDisplay: React.FC<{lmType: {image: ImageURISource, label:string}, style?: ViewStyle}> = ({lmType, style}) => {
            return (
                <View style={[{marginVertical: 5, flexDirection: 'row'}, style]}>
                    <Image style={{height: 25, width: 18}} source={lmType.image} />
                    <Text style={{fontSize: 15, marginLeft: 10, textAlign: 'center', color: 'white'}}>{lmType.label}</Text>
                </View>
            )
        }

        const ActionOptions: React.FC<{currentAction?: VoiceAction}> = ({currentAction}) => {
            Iif (currentAction) {
                switch (currentAction.actionType) {
                    case 'Add landmark':
                        switch (currentAction.actionStep) {
                            case 1:
                                return <Text style={{fontSize: 20, margin: 20, color: 'white'}}>Describe the landmark</Text>
                            case 2:
                                return (
                                    <View>
                                        <Text style={{fontSize: 17, marginHorizontal: 20, marginBottom: 5, color: 'white'}}>Your description:</Text>
                                        <Text style={{fontSize: 15, marginHorizontal: 20, marginBottom: 10, color:'white'}}>{newLandmark.description}</Text>
                                        <Text style={{fontSize: 17, margin: 20, color: 'white'}}>Choose from the available types: </Text>
                                        <FlatList
                                            style={{marginBottom: 20, marginHorizontal:20}}
                                            data={Object.keys(lmTypes).map(typeId => typeId)}
                                            numColumns={2}
                                            keyExtractor={item => item}
                                            renderItem={(item => {
                                                return (
                                                    <LmTypeDisplay key={item.item} lmType={lmTypes[item.item]} style={{flexBasis: '50%'}} />
                                                )})} />
                                    </View>
                                )
                            case 3:
                                return (
                                    <View>
                                        <Text style={{fontSize: 20, margin: 20, marginTop: 10, color: 'white'}}>Your landmark: </Text>
                                        <View style={{marginLeft: 40, marginBottom: 20}}>
                                            <Text style={{fontSize: 17, marginBottom: 10, color: 'white'}}>Description: </Text>
                                            <Text style={{fontSize: 15, marginBottom: 20, marginLeft: 20, color: 'white'}}>{newLandmark.description}</Text>
                                            <Text style={{fontSize: 17, marginRight: 10, marginBottom: 10, color: 'white'}}>Type: </Text>
                                            <LmTypeDisplay lmType={lmTypes[newLandmark.landmark_type]} style={{marginLeft: 20}} />
                                        </View>
                                        <Text style={{fontSize: 17, marginHorizontal: 20, marginBottom:10, color: 'white'}}>Are you sure you want to add this landmark?</Text>
                                        <Text style={{fontSize: 15, marginHorizontal: 40, marginBottom: 10, color: 'white'}}>- Say "Yes" to confirm</Text>
                                        <Text style={{fontSize: 15, marginHorizontal: 40, marginBottom: 20, color: 'white'}}>- Say "No" to cancel</Text>
                                    </View>
                                )
                            case 4:
                                return (
                                    <View>
                                        <Text style={{fontSize: 20, margin: 20, color: 'white'}}>Done. Anything else?</Text>
                                    </View>
                                )
                        }
                }
            }

            if (addLandmarkStatus == 'loading') {
                return <ActivityIndicator color='white' size="large"/>
            }
            else Iif (addLandmarkStatus == "error") {
                return <Text style={{fontSize: 20, margin: 20, color: 'white'}}>Something went wrong when trying to upload the landmark.</Text>
            }
        }

        const ActionProcessingIndicator: React.FC = () => {
            return (
                <View style={{margin: 20}}>
                    <Text style={{fontSize: 20, margin: 20, color: 'white'}}>Adding landmark...</Text>
                    <ActivityIndicator color="white" size="large" />
                </View>
            )
        }

        const SpeechActivity: React.FC = () => {
            return (
                <View style={{justifyContent: 'center', margin: 20, padding: 10, backgroundColor: 'white'}}>
                    {previousResult ? <Text style={{fontSize: 15, marginHorizontal: 20, marginBottom: 10, color: "black", alignSelf: 'center'}}>Last result: {previousResult}</Text> : null }
                    {partialSpeechResult ?
                    <Wave color={colors.red} hidesWhenStopped={false} animating={true} style={{alignSelf: 'center', marginBottom: 10}} /> :
                    <Pulse color={colors.red} hidesWhenStopped={false} animating={true} style={{alignSelf: 'center', marginBottom: 10}} />}
                    <Text style={{fontSize: 15, marginHorizontal: 20, color: "black", alignSelf: 'center'}}>{
                        speechResult ? speechResult :
                        partialSpeechResult ? partialSpeechResult : ""}
                    </Text>
                </View>
            )
        }

        const VoicePanelHeader: React.FC = () => {
            return (
                <View style={[GlobalStyles.itemRowContainer, {width: '100%'}]} >
                    <Text style={{fontSize: 20, margin: 20, color: 'white', flexBasis: "70%"}}>{action ? action.actionType : "Waiting for command..."}</Text>
                    <TouchableOpacity style={{margin: 20}} onPress={async () => await closeVoice(true)}><FontAwesome size={20} color='white' name='times'/></TouchableOpacity>
                </View>
            )
        }

        return (
        <Modal
            onModalHide={maybeOpenNearbyLandmarks}
            swipeDirection='down'
            useNativeDriver={true}
            useNativeDriverForBackdrop={true}
            avoidKeyboard={true}
            onBackdropPress={async () => await closeVoice(true)}
            style={{justifyContent: "flex-end", height: '100%', margin: 0}}
            isVisible={voiceVisible} >
            <KeyboardAvoidingView>
                <SafeAreaView style={{backgroundColor: colors.red}}>
                    {addLandmarkStatus == "loading" ?
                    <ActionProcessingIndicator /> :
                    <View>
                        <VoicePanelHeader />
                        <Separator color="lightgray" style={{marginHorizontal: 20, marginBottom: 20, opacity: .5}} />
                        {action ?
                        <ActionOptions currentAction={action} /> :
                        <View style={{marginBottom: 20}}>
                            <Text style={{fontSize: 15, marginHorizontal: 40, marginBottom: 10, color: 'white'}}>- Say "Add landmark" to add a landmark</Text>
                            <Text style={{fontSize: 15, marginHorizontal: 40, marginBottom: 10, color: 'white'}}>- Say "Near" to view nearby landmarks</Text>
                        </View>}
                        {response? <Text style={{fontSize: 13, marginHorizontal: 40, marginBottom: 20, color: 'white'}}>{response}</Text> : null}
                        <SpeechActivity />
                        <Text style={{fontSize: 13, marginHorizontal: 40, marginBottom: 20, color: 'white'}}>Say "cancel", "bye", "goodbye", or "stop" to exit.</Text>
                        <Text style={{fontSize: 13, marginHorizontal: 40, marginBottom: 20, color: 'white'}}>Say "back" to go back a step.</Text>
                    </View>}
                </SafeAreaView>
            </KeyboardAvoidingView>
        </Modal>
        )
    }