#ifndef __JABYENGINE_CD_IO_HPP__
#define __JABYENGINE_CD_IO_HPP__
#include "ioport.hpp"

namespace JabyEngine {
    namespace CD_IO {
        struct DataSector {
            static constexpr size_t SizeBytes = 2048;
            static constexpr size_t SizeWords = (SizeBytes/sizeof(uint32_t));

            uint32_t data[SizeWords];

            template<typename T>
            static constexpr T words_to_sectors(T size) {
                return (size + static_cast<T>(DataSector::SizeWords - 1))/static_cast<T>(DataSector::SizeWords);
            }
        };

        enum Index {
            Index0 = 0,
            Index1 = 1,
            Index2 = 2,
            Index3 = 3,
        };

        struct CDDAVolume {
            typedef uint8_t Type;

            static constexpr uint8_t Off     = 0x0;
            static constexpr uint8_t Default = 0x80;
            static constexpr uint8_t Max     = 0xFF;
        };

        __declare_io_type(IndexStatus, uint8_t, 
            static constexpr auto PortIndex             = BitRange::from_to(0, 1);
            static constexpr auto HasXAFifoData         = Bit(2);
            static constexpr auto IsParameterFifoEmpty  = Bit(3);
            static constexpr auto HasParameterFifoSpace = Bit(4);
            static constexpr auto HasResponseFifoData   = Bit(5);
            static constexpr auto HasDataFifoData       = Bit(6);
            static constexpr auto IsTransmissionBusy    = Bit(7);
        );

        __declare_io_type(InterruptEnable, uint8_t, 
            static constexpr auto InterruptTypValue = BitRange::from_to(0, 2);
            static constexpr auto InterruptExtended = BitRange::from_to(0, 4);
            static constexpr auto UnknownIRQ        = Bit(3);
            static constexpr auto CommandStartIRQ   = Bit(4);
        );
        typedef InterruptEnable_v InterruptFlag_v;

        __declare_io_type(Request, uint8_t, 
            static constexpr auto WantCommandStartIRQ = Bit(5);
            static constexpr auto WantData            = Bit(7);
        );

        __declare_io_type(SoundMapCoding, uint8_t,
            static constexpr auto Stereo             = Bit(0);
            static constexpr auto Mono               = !Stereo;
            static constexpr auto SampleRate_18900hz = Bit(2);
            static constexpr auto SampleRate_37800hz = !SampleRate_18900hz;
            static constexpr auto BitsPerSample8     = Bit(4);
            static constexpr auto BitsPerSample4     = !BitsPerSample8;
            static constexpr auto Emphasis           = Bit(6);
        );

        __declare_io_type(AudioVolumeApply, uint8_t, 
            static constexpr auto Mute         = Bit(0);
            static constexpr auto ApplyChanges = Bit(5);
        );

        __declare_io_type(ResponseFifo,    uint8_t,);
        __declare_io_type(CommandFifo,     uint8_t,);
        __declare_io_type(DataFifo,        uint8_t,);
        __declare_io_type(DataFifo16,      uint16_t,);
        __declare_io_type(ParameterFifo,   uint8_t,);
        __declare_io_type(SoundMapDataOut, uint8_t,);
        __declare_io_type(LeftCD2LeftSPU,  CDDAVolume::Type,);
        __declare_io_type(LeftCD2RightSPU, CDDAVolume::Type,);
        __declare_io_type(RightCD2RightSPU,CDDAVolume::Type,);
        __declare_io_type(RightCD2LeftSPU, CDDAVolume::Type,);

        struct Interrupt {
            enum Type : uint8_t {
                None        = 0,
                DataReady   = 1,
                Complete    = 2,
                Acknowledge = 3,
                DataEnd     = 4,
                DiskError   = 5
            };

            static void enable(InterruptEnable_v& port) {
                port.set(InterruptEnable_t::InterruptTypValue.range_max<uint8_t>());
            }

            static void enable_extended(InterruptEnable_v& port) {
                port = InterruptEnable_t::from(InterruptEnable_t::InterruptTypValue.range_max<uint8_t>(), InterruptEnable_t::UnknownIRQ, InterruptEnable_t::CommandStartIRQ);
            }

            static Type get_type(const InterruptFlag_v& port) {
                return static_cast<Type>(port.get(InterruptFlag_v::InterruptTypValue));
            }

            static void ack(InterruptFlag_v& port) {
                port.set(InterruptFlag_v::InterruptTypValue.range_max<uint8_t>());
            }

            static void ack_extended(InterruptFlag_v& port) {
                port = InterruptFlag_v::from(InterruptFlag_v::InterruptTypValue.range_max<uint8_t>(), InterruptEnable_v::UnknownIRQ, InterruptEnable_v::CommandStartIRQ);
            }
        };

        struct Command {
            struct Desc {
                uint8_t         id;
                Interrupt::Type complete_irq;
            };

            static constexpr Desc GetStat{0x01, Interrupt::Type::Acknowledge};
            static constexpr Desc  SetLoc{0x02, Interrupt::Type::Acknowledge};
            static constexpr Desc   ReadN{0x06, Interrupt::Type::DataReady};
            static constexpr Desc   Pause{0x09, Interrupt::Type::Complete};
            static constexpr Desc    Init{0x0A, Interrupt::Type::Complete};
            static constexpr Desc SetMode{0x0E, Interrupt::Type::Acknowledge};
        };
        
        static constexpr auto IORegister1Adr = 0x1F801801;
        static constexpr auto IORegister2Adr = 0x1F801802;
        static constexpr auto IORegister3Adr = 0x1F801803;

        __declare_new_io_port(IndexStatus, 0x1F801800);

        #define __declare_index_io_port(type, name, adr)       __cast_io_adr_with_type(inline, type, name, adr)
        #define __declare_index_io_port_const(type, name, adr) __cast_io_adr_with_type(const inline, type, name, adr)

        struct PortIndex0 {
            __declare_new_const_io_port(ResponseFifo, IORegister1Adr);
                  __declare_new_io_port(CommandFifo,  IORegister1Adr);

            __declare_new_const_io_port(DataFifo,      IORegister2Adr);
            __declare_new_const_io_port(DataFifo16,    IORegister2Adr);
                  __declare_new_io_port(ParameterFifo, IORegister2Adr);

            __declare_new_const_io_port(InterruptEnable, IORegister3Adr);
                  __declare_new_io_port(Request,         IORegister3Adr);

            static void change_to() {
                IndexStatus = Index::Index0;
            }
        };

        struct PortIndex1 {
            __declare_new_const_io_port(ResponseFifo,    IORegister1Adr);
                  __declare_new_io_port(SoundMapDataOut, IORegister1Adr);

            __declare_new_const_io_port(DataFifo,        IORegister2Adr);
            __declare_new_const_io_port(DataFifo16,      IORegister2Adr);
                  __declare_new_io_port(InterruptEnable, IORegister2Adr);

            __declare_new_io_port(InterruptFlag, IORegister3Adr);

            static void change_to() {
                IndexStatus = Index::Index1;
            }   
        };

        struct PortIndex2 {
            __declare_new_const_io_port(ResponseFifo,   IORegister1Adr);
                  __declare_new_io_port(SoundMapCoding, IORegister1Adr);

            __declare_new_const_io_port(DataFifo,       IORegister2Adr);
            __declare_new_const_io_port(DataFifo16,     IORegister2Adr);
                  __declare_new_io_port(LeftCD2LeftSPU, IORegister2Adr);

            __declare_new_const_io_port(InterruptEnable, IORegister3Adr);
                  __declare_new_io_port(LeftCD2RightSPU, IORegister3Adr);

            static void change_to() {
                IndexStatus = Index::Index2;
            }
        };

        struct PortIndex3 {
            __declare_new_const_io_port(ResponseFifo,     IORegister1Adr);
                  __declare_new_io_port(RightCD2RightSPU, IORegister1Adr);

            __declare_new_const_io_port(DataFifo,        IORegister2Adr);
            __declare_new_const_io_port(DataFifo16,      IORegister2Adr);
                  __declare_new_io_port(RightCD2LeftSPU, IORegister1Adr);

            __declare_new_const_io_port(InterruptFlag,    IORegister3Adr);
                  __declare_new_io_port(AudioVolumeApply, IORegister3Adr);

            static void change_to() {
                IndexStatus = Index::Index3;
            }
        };

        #undef __declare_index_io_port
        #undef __declare_index_io_port_const
    }
}

#endif //!__JABYENGINE_CD_IO_HPP__