DFPReader.h

#pragma once

#include <stdint.h>
#include <DFPlayerMini.h>

class DFPReader : public DFPlayerMini {
public:
    static const uint8_t PlaybackStartMs =   120;

    // Track file numbers
    static const uint8_t Mp3TrackZero =           200;
    static const uint8_t Mp3TrackTen =            210;
    static const uint8_t Mp3TrackTwenty =         220;
    static const uint8_t Mp3TrackThirty =         221;
    static const uint8_t Mp3TrackFourty =         222;
    static const uint8_t Mp3TrackFifty =          223;
    static const uint8_t Mp3TrackSixty =          224;
    static const uint8_t Mp3TrackSeventy =        225;
    static const uint8_t Mp3TrackEighty =         226;
    static const uint8_t Mp3TrackNinety =         227;
    static const uint8_t Mp3TrackHundred =        228;
    static const uint8_t Mp3TrackThousand =       229;
    static const uint8_t Mp3TrackMillion =        230;
    static const uint8_t Mp3TrackBillion =        231;
    static const uint8_t Mp3TrackTrillion =       232;
    static const uint8_t Mp3TrackPoint =          233;
    static const uint8_t Mp3TrackMinus =          234;
    static const uint8_t Mp3TrackYear =           235;
    static const uint8_t Mp3TrackYears =          236;
    static const uint8_t Mp3TrackMonth =          237;
    static const uint8_t Mp3TrackMonths =         238;
    static const uint8_t Mp3TrackWeek =           239;
    static const uint8_t Mp3TrackWeeks =          240;
    static const uint8_t Mp3TrackDay =            241;
    static const uint8_t Mp3TrackDays =           242;
    static const uint8_t Mp3TrackHour =           243;
    static const uint8_t Mp3TrackHours =          244;
    static const uint8_t Mp3TrackMinute =         245;
    static const uint8_t Mp3TrackMinutes =        246;
    static const uint8_t Mp3TrackSecond =         247;
    static const uint8_t Mp3TrackSeconds =        248;
    static const uint8_t Mp3TrackMillisecond =    249;
    static const uint8_t Mp3TrackMilliseconds =   250;
    static const uint8_t Mp3TrackAnd =            251;

public:
    enum PlaybackState {
        Idle,       
        Pending,    
        Playing     
    };

    DFPReader(Stream& serial, DFPlayerMini::Cmd playCmd=DFPlayerMini::PlayTf, uint8_t busyPin=0, uint8_t readerBufferSize=30);

    ~DFPReader();

    void begin(bool bootWait=true);

    void update();

    void readNumber(double number, uint8_t dp=0);

    bool reading();

    void resetReaderBuf();

    bool appendElement(uint8_t value);

private:
    DFPlayerMini::Cmd _playCmd;

    void startPlayback(uint16_t track);

    uint8_t popElement();

    void appendSubThousand(int16_t num);

    void appendMagnitude(double* number, double magnitude, uint8_t magnitudeElement);

    // Some data for figuring out this pesky human speech stuff
    static const uint8_t SMALL_NUMBERS[];
    static const uint8_t TENS[];

    // Ring buffer
    const uint8_t readerBufSize;
    uint8_t *readerBuf;
    uint8_t tailPtr;
    uint8_t unplayedElements;

    uint32_t lastPlayStart;
    PlaybackState playbackState;

};