#include "portaudiocpp/HostApi.hxx"

#include "portaudiocpp/System.hxx"
#include "portaudiocpp/Device.hxx"
#include "portaudiocpp/SystemDeviceIterator.hxx"
#include "portaudiocpp/Exception.hxx"

namespace portaudio
{

    // -----------------------------------------------------------------------------------

    HostApi::HostApi(PaHostApiIndex index) : devices_(NULL)
    {
        try
        {
            info_ = Pa_GetHostApiInfo(index);

            // Create and populate devices array:
            int numDevices = deviceCount();

            devices_ = new Device*[numDevices];

            for (int i = 0; i < numDevices; ++i)
            {
                PaDeviceIndex deviceIndex = Pa_HostApiDeviceIndexToDeviceIndex(index, i);

                if (deviceIndex < 0)
                {
                    throw PaException(deviceIndex);
                }

                devices_[i] = &System::instance().deviceByIndex(deviceIndex);
            }
        }
        catch (const std::exception &e)
        {
            // Delete any (partially) constructed objects (deconstructor isn't called):
            delete[] devices_; // devices_ is either NULL or valid

            // Re-throw exception:
            throw e;
        }
    }

    HostApi::~HostApi()
    {
        // Destroy devices array:
        delete[] devices_;
    }

    // -----------------------------------------------------------------------------------

    PaHostApiTypeId HostApi::typeId() const
    {
        return info_->type;
    }

    PaHostApiIndex HostApi::index() const
    {
        PaHostApiIndex index = Pa_HostApiTypeIdToHostApiIndex(typeId());

        if (index < 0)
            throw PaException(index);

        return index;
    }

    const char *HostApi::name() const
    {
        return info_->name;
    }

    int HostApi::deviceCount() const
    {
        return info_->deviceCount;
    }

    // -----------------------------------------------------------------------------------

    HostApi::DeviceIterator HostApi::devicesBegin()
    {
        DeviceIterator tmp;
        tmp.ptr_ = &devices_[0]; // begin (first element)
        return tmp;
    }

    HostApi::DeviceIterator HostApi::devicesEnd()
    {
        DeviceIterator tmp;
        tmp.ptr_ = &devices_[deviceCount()]; // end (one past last element)
        return tmp;
    }

    // -----------------------------------------------------------------------------------

    Device &HostApi::defaultInputDevice() const
    {
        return System::instance().deviceByIndex(info_->defaultInputDevice);
    }

    Device &HostApi::defaultOutputDevice() const
    {
        return System::instance().deviceByIndex(info_->defaultOutputDevice);
    }

    // -----------------------------------------------------------------------------------

    bool HostApi::operator==(const HostApi &rhs) const
    {
        return (typeId() == rhs.typeId());
    }

    bool HostApi::operator!=(const HostApi &rhs) const
    {
        return !(*this == rhs);
    }

    // -----------------------------------------------------------------------------------

} // namespace portaudio
