// Copyright 2016 Massimiliano Pinto
// Copyright 2017 David Conran
/// @file
/// @brief Denon support
/// Original Denon support added by https://github.com/csBlueChip
/// Ported over by Massimiliano Pinto
/// @see https://github.com/z3t0/Arduino-IRremote/blob/master/ir_Denon.cpp
/// @see http://assets.denon.com/documentmaster/us/denon%20master%20ir%20hex.xls

// Supports:
//   Brand: Denon, Model: AVR-3801 A/V Receiver (probably)

#include <algorithm>
#include "IRrecv.h"
#include "IRsend.h"
#include "IRutils.h"


// Constants
const uint16_t kDenonTick = 263;
const uint16_t kDenonHdrMarkTicks = 1;
const uint16_t kDenonHdrMark = kDenonHdrMarkTicks * kDenonTick;
const uint16_t kDenonHdrSpaceTicks = 3;
const uint16_t kDenonHdrSpace = kDenonHdrSpaceTicks * kDenonTick;
const uint16_t kDenonBitMarkTicks = 1;
const uint16_t kDenonBitMark = kDenonBitMarkTicks * kDenonTick;
const uint16_t kDenonOneSpaceTicks = 7;
const uint16_t kDenonOneSpace = kDenonOneSpaceTicks * kDenonTick;
const uint16_t kDenonZeroSpaceTicks = 3;
const uint16_t kDenonZeroSpace = kDenonZeroSpaceTicks * kDenonTick;
const uint16_t kDenonMinCommandLengthTicks = 510;
const uint16_t kDenonMinGapTicks =
    kDenonMinCommandLengthTicks -
    (kDenonHdrMarkTicks + kDenonHdrSpaceTicks +
     kDenonBits * (kDenonBitMarkTicks + kDenonOneSpaceTicks) +
     kDenonBitMarkTicks);
const uint32_t kDenonMinGap = kDenonMinGapTicks * kDenonTick;
const uint64_t kDenonManufacturer = 0x2A4CULL;

#if SEND_DENON
/// Send a Denon formatted message.
/// Status: STABLE / Should be working.
/// @param[in] data The message to be sent.
/// @param[in] nbits The number of bits of message to be sent.
/// @param[in] repeat The number of times the command is to be repeated.
/// @note Some Denon devices use a Kaseikyo/Panasonic 48-bit format
///   Others use the Sharp protocol.
void IRsend::sendDenon(uint64_t data, uint16_t nbits, uint16_t repeat) {
  if (nbits >= kPanasonicBits)  // Is this really Panasonic?
    sendPanasonic64(data, nbits, repeat);
  else if (nbits == kDenonLegacyBits)
    // Support legacy (broken) calls of sendDenon().
    sendSharpRaw(data & (~0x2000ULL), nbits + 1, repeat);
  else
    sendSharpRaw(data, nbits, repeat);
}
#endif

#if DECODE_DENON
/// Decode the supplied Delonghi A/C message.
/// Status: STABLE / Should work fine.
/// @param[in,out] results Ptr to the data to decode & where to store the decode
///   result.
/// @param[in] offset The starting index to use when attempting to decode the
///   raw data. Typically/Defaults to kStartOffset.
/// @param[in] nbits The number of data bits to expect.
/// @param[in] strict Flag indicating if we should perform strict matching.
/// @return A boolean. True if it can decode it, false if it can't.
/// @see https://github.com/z3t0/Arduino-IRremote/blob/master/ir_Denon.cpp
bool IRrecv::decodeDenon(decode_results *results, uint16_t offset,
                         const uint16_t nbits, const bool strict) {
  // Compliance
  if (strict) {
    switch (nbits) {
      case kDenonBits:
      case kDenon48Bits:
      case kDenonLegacyBits:
        break;
      default:
        return false;
    }
  }

  // Denon uses the Sharp & Panasonic(Kaseikyo) protocol for some
  // devices, so check for those first.
  // It is not exactly like Sharp's protocols, but close enough.
  // e.g. The expansion bit is not set for Denon vs. set for Sharp.
  // Ditto for Panasonic, it's the same except for a different
  // manufacturer code.

  if (!decodeSharp(results, offset, nbits, true, false) &&
      !decodePanasonic(results, offset, nbits, true, kDenonManufacturer)) {
    // We couldn't decode it as expected, so try the old legacy method.
    // NOTE: I don't think this following protocol actually exists.
    //       Looks like a partial version of the Sharp protocol.
    if (strict && nbits != kDenonLegacyBits) return false;

    uint64_t data = 0;

    // Match Header + Data + Footer
    if (!matchGeneric(results->rawbuf + offset, &data,
                      results->rawlen - offset, nbits,
                      kDenonHdrMark, kDenonHdrSpace,
                      kDenonBitMark, kDenonOneSpace,
                      kDenonBitMark, kDenonZeroSpace,
                      kDenonBitMark, 0, false)) return false;

    // Success
    results->bits = nbits;
    results->value = data;
    results->address = 0;
    results->command = 0;
  }  // Legacy decode.

  // Compliance
  if (strict && nbits != results->bits) return false;

  // Success
  results->decode_type = DENON;
  return true;
}
#endif