/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2016 - ROLI Ltd.

   Permission is granted to use this software under the terms of the ISC license
   http://www.isc.org/downloads/software-support-policy/isc-license/

   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
   copyright notice and this permission notice appear in all copies.

   THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
   FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
   OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
   USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
   OF THIS SOFTWARE.

   -----------------------------------------------------------------------------

   To release a closed-source product which uses other parts of JUCE not
   licensed under the ISC terms, commercial licenses are available: visit
   www.juce.com for more information.

  ==============================================================================
*/

MidiBuffer MPEMessages::addZone (MPEZone zone)
{
    MidiBuffer buffer (MidiRPNGenerator::generate (zone.getFirstNoteChannel(),
                                                   zoneLayoutMessagesRpnNumber,
                                                   zone.getNumNoteChannels(),
                                                   false, false));

    buffer.addEvents (perNotePitchbendRange (zone), 0, -1, 0);
    buffer.addEvents (masterPitchbendRange (zone), 0, -1, 0);

    return buffer;
}

MidiBuffer MPEMessages::perNotePitchbendRange (MPEZone zone)
{
    return MidiRPNGenerator::generate (zone.getFirstNoteChannel(), 0,
                                       zone.getPerNotePitchbendRange(),
                                       false, false);
}

MidiBuffer MPEMessages::masterPitchbendRange (MPEZone zone)
{
    return MidiRPNGenerator::generate (zone.getMasterChannel(), 0,
                                       zone.getMasterPitchbendRange(),
                                       false, false);
}

MidiBuffer MPEMessages::clearAllZones()
{
    return MidiRPNGenerator::generate (1, zoneLayoutMessagesRpnNumber, 16, false, false);
}

MidiBuffer MPEMessages::setZoneLayout (const MPEZoneLayout& layout)
{
    MidiBuffer buffer;

    buffer.addEvents (clearAllZones(), 0, -1, 0);

    for (int i = 0; i < layout.getNumZones(); ++i)
        buffer.addEvents (addZone (*layout.getZoneByIndex (i)), 0, -1, 0);

    return buffer;
}

//==============================================================================
//==============================================================================
#if JUCE_UNIT_TESTS

class MPEMessagesTests  : public UnitTest
{
public:
    MPEMessagesTests() : UnitTest ("MPEMessages class") {}

    void runTest() override
    {
        beginTest ("add zone");
        {
            {
                MidiBuffer buffer = MPEMessages::addZone (MPEZone (1, 7));

                const uint8 expectedBytes[] =
                {
                    0xb1, 0x64, 0x06, 0xb1, 0x65, 0x00, 0xb1, 0x06, 0x07, // set up zone
                    0xb1, 0x64, 0x00, 0xb1, 0x65, 0x00, 0xb1, 0x06, 0x30, // per-note pbrange (default = 48)
                    0xb0, 0x64, 0x00, 0xb0, 0x65, 0x00, 0xb0, 0x06, 0x02  // master pbrange (default = 2)
                };

                testMidiBuffer (buffer, expectedBytes, sizeof (expectedBytes));
            }
            {
                MidiBuffer buffer = MPEMessages::addZone (MPEZone (11, 5, 96, 0));

                const uint8 expectedBytes[] =
                {
                    0xbb, 0x64, 0x06, 0xbb, 0x65, 0x00, 0xbb, 0x06, 0x05, // set up zone
                    0xbb, 0x64, 0x00, 0xbb, 0x65, 0x00, 0xbb, 0x06, 0x60, // per-note pbrange (custom)
                    0xba, 0x64, 0x00, 0xba, 0x65, 0x00, 0xba, 0x06, 0x00  // master pbrange (custom)
                };

                testMidiBuffer (buffer, expectedBytes, sizeof (expectedBytes));
            }
        }

        beginTest ("set per-note pitchbend range");
        {
            MPEZone zone (3, 7, 96);
            MidiBuffer buffer = MPEMessages::perNotePitchbendRange (zone);

            const uint8 expectedBytes[] = { 0xb3, 0x64, 0x00, 0xb3, 0x65, 0x00, 0xb3, 0x06, 0x60 };

            testMidiBuffer (buffer, expectedBytes, sizeof (expectedBytes));
        }


        beginTest ("set master pitchbend range");
        {
            MPEZone zone (3, 7, 48, 60);
            MidiBuffer buffer = MPEMessages::masterPitchbendRange (zone);

            const uint8 expectedBytes[] = { 0xb2, 0x64, 0x00, 0xb2, 0x65, 0x00, 0xb2, 0x06, 0x3c };

            testMidiBuffer (buffer, expectedBytes, sizeof (expectedBytes));
        }

        beginTest ("clear all zones");
        {
            MidiBuffer buffer = MPEMessages::clearAllZones();

            const uint8 expectedBytes[] = { 0xb0, 0x64, 0x06, 0xb0, 0x65, 0x00, 0xb0, 0x06, 0x10 };

            testMidiBuffer (buffer, expectedBytes, sizeof (expectedBytes));
        }

        beginTest ("set complete state");
        {
            MPEZoneLayout layout;
            layout.addZone (MPEZone (1, 7, 96, 0));
            layout.addZone (MPEZone (9, 7));
            layout.addZone (MPEZone (5, 3));
            layout.addZone (MPEZone (5, 4));
            layout.addZone (MPEZone (6, 4));

            MidiBuffer buffer = MPEMessages::setZoneLayout (layout);

            const uint8 expectedBytes[] = {
                0xb0, 0x64, 0x06, 0xb0, 0x65, 0x00, 0xb0, 0x06, 0x10,  // clear all zones
                0xb1, 0x64, 0x06, 0xb1, 0x65, 0x00, 0xb1, 0x06, 0x03,  // set zone 1 (1, 3)
                0xb1, 0x64, 0x00, 0xb1, 0x65, 0x00, 0xb1, 0x06, 0x60,  // per-note pbrange (custom)
                0xb0, 0x64, 0x00, 0xb0, 0x65, 0x00, 0xb0, 0x06, 0x00,  // master pbrange (custom)
                0xb6, 0x64, 0x06, 0xb6, 0x65, 0x00, 0xb6, 0x06, 0x04,  // set zone 2 (6, 4)
                0xb6, 0x64, 0x00, 0xb6, 0x65, 0x00, 0xb6, 0x06, 0x30,  // per-note pbrange (default = 48)
                0xb5, 0x64, 0x00, 0xb5, 0x65, 0x00, 0xb5, 0x06, 0x02   // master pbrange (default = 2)
            };

            testMidiBuffer (buffer, expectedBytes, sizeof (expectedBytes));
        }
    }

private:
    //==============================================================================
    void testMidiBuffer (MidiBuffer& buffer, const uint8* expectedBytes, int expectedBytesSize)
    {
        uint8 actualBytes[128] = { 0 };
        extractRawBinaryData (buffer, actualBytes, sizeof (actualBytes));

        expectEquals (std::memcmp (actualBytes, expectedBytes, (std::size_t) expectedBytesSize), 0);
    }

    //==============================================================================
    void extractRawBinaryData (const MidiBuffer& midiBuffer, const uint8* bufferToCopyTo, std::size_t maxBytes)
    {
        std::size_t pos = 0;
        MidiBuffer::Iterator iter (midiBuffer);
        MidiMessage midiMessage;
        int samplePosition; // Note: not actually used, so no need to initialise.

        while (iter.getNextEvent (midiMessage, samplePosition))
        {
            const uint8* data = midiMessage.getRawData();
            std::size_t dataSize = (std::size_t) midiMessage.getRawDataSize();

            if (pos + dataSize > maxBytes)
                return;

            std::memcpy ((void*) (bufferToCopyTo + pos), data, dataSize);
            pos += dataSize;
        }
    }
};

static MPEMessagesTests MPEMessagesUnitTests;

#endif // JUCE_UNIT_TESTS
