#include "pch.h"
#include "SoundEffect.h"
#include <iostream>

float SoundEffect::m_GlobalVolume{ 1.f };

SoundEffect::SoundEffect(const  std::string& path )
	:m_pMixChunk{ Mix_LoadWAV( path.c_str( ) ) }
{
	if ( m_pMixChunk == nullptr )
	{
		throw std::runtime_error("SoundEffect: Failed to load " + path + ",\nSDL_mixer Error: " + Mix_GetError());
	}
	else
	{
		Mix_VolumeChunk(m_pMixChunk, int(m_GlobalVolume * 128));
	}
}
SoundEffect::~SoundEffect( )
{
	Mix_FreeChunk( m_pMixChunk );
	m_pMixChunk = nullptr;
}

bool SoundEffect::IsLoaded( ) const
{
	return m_pMixChunk != nullptr;
}

bool SoundEffect::Play( int loops ) const
{
	// Don't save the channel as a data member, 
	// because when it stops playing the channel becomes free
	// and available for usage by other effects
	if ( m_pMixChunk != nullptr )
	{
		int channel{ Mix_PlayChannel( -1, m_pMixChunk, loops ) };
		return channel == -1 ? false : true;
	}
	else
	{
		return false;
	}
}

void SoundEffect::SetVolume( float value )
{
	if ( m_pMixChunk != nullptr )
	{
		Mix_VolumeChunk( m_pMixChunk, int(value * m_GlobalVolume * 128) );
	}
}

float SoundEffect::GetVolume( ) const
{
	if ( m_pMixChunk != nullptr )
	{
		return Mix_VolumeChunk( m_pMixChunk, -1 ) / 128.f;
	}
	else
	{
		return -1;
	}
}

void SoundEffect::StopAll( )
{
	Mix_HaltChannel(-1 );
}

void SoundEffect::PauseAll( )
{
	Mix_Pause( -1 );
}
void SoundEffect::ResumeAll( )
{
	Mix_Resume( -1 );
}