/**************************************************************************/
/*!
    @file     PN532/PN532/emulatetag.h
    @author   Armin Wieser
    @license  BSD

    Implemented using NFC forum documents & library of libnfc
*/
/**************************************************************************/

#ifndef __EMULATETAG_H__
#define __EMULATETAG_H__

#include "PN532/PN532/PN532.h"

#define NDEF_MAX_LENGTH 128 // altough ndef can handle up to 0xfffe in size, arduino cannot.
typedef enum {
    COMMAND_COMPLETE,
    TAG_NOT_FOUND,
    FUNCTION_NOT_SUPPORTED,
    MEMORY_FAILURE,
    END_OF_FILE_BEFORE_REACHED_LE_BYTES
} responseCommand;

class EmulateTag {

  public:
    EmulateTag(PN532Interface& interface) : pn532(interface), uidPtr(0), tagWrittenByInitiator(false), tagWriteable(true),
        updateNdefCallback(0) {}

    bool init();

    bool emulate(const uint16_t tgInitAsTargetTimeout = 0);

    /*
        @param uid pointer to byte array of length 3 (uid is 4 bytes - first byte is fixed) or zero for uid
    */
    void setUid(uint8_t* uid = 0);

    void setNdefFile(const uint8_t* ndef, const int16_t ndefLength);

    void getContent(uint8_t** buf, uint16_t* length) {
        *buf = ndef_file + 2; // first 2 bytes = length
        *length = (ndef_file[0] << 8) + ndef_file[1];
    }

    bool writeOccured() {
        return tagWrittenByInitiator;
    }

    void setTagWriteable(bool setWriteable) {
        tagWriteable = setWriteable;
    }

    uint8_t* getNdefFilePtr() {
        return ndef_file;
    }

    uint8_t getNdefMaxLength() {
        return NDEF_MAX_LENGTH;
    }

    void attach(void (*func)(uint8_t* buf, uint16_t length)) {
        updateNdefCallback = func;
    };

  private:
    PN532 pn532;
    uint8_t ndef_file[NDEF_MAX_LENGTH];
    uint8_t* uidPtr;
    bool tagWrittenByInitiator;
    bool tagWriteable;
    void (*updateNdefCallback)(uint8_t* ndef, uint16_t length);

    void setResponse(responseCommand cmd, uint8_t* buf, uint8_t* sendlen, uint8_t sendlenOffset = 0);
};

#endif
