#include "ShaderScene.h"
#include "ShaderManager.h"

CShaderManager::CShaderManager() {
	m_lstShaders.clear();
	m_iShadersNum = 0;

}
CShaderManager::~CShaderManager() {
	if((m_iShadersNum >0) && (m_lstShaders.size() > 0)) {
		int i;
		for( i = 0; i < m_lstShaders.size(); i++ ) {
			if(m_lstShaders[i] != NULL) {
				delete m_lstShader[i];
				m_lstShaders[i] = NULL;
			}
		}
		m_lstShaders.clear();
		m_iShadersNum = 0;
	}
}
void CShaderManager::Apply(int iShaderIndex) {
	if((iShaderIndex >= 0) && (iShaderIndex < m_iShadersNum)) {
		if(m_lstShader[iShaderIndex] != NULL) {
			m_lstShader[iShaderIndex]->Apply();
			break;
		}
	}
}
void CShaderManager::DeleteAllShader() {
	if((m_iShadersNum >0) && (m_lstShaders.size() > 0)) {
		int i;
		for( i = 0; i < m_lstShaders.size(); i++ ) {
			if(m_lstShaders[i] != NULL) {
				delete m_lstShader[i];
				m_lstShaders[i] = NULL;
			}
		}
		m_lstShaders.clear();
		m_iShadersNum = 0;
	}	
}

int CShaderManager::GetShader(char *strShader) {

	if((strShader != NULL) && (strlen(&strShader) > 1) {
		int i;
		for( i = 0; i < m_lstShaders.size() ; i++ ) {
			if(m_lstShaders[i] != NULL) {
				if(strcmp(strShader,m_lstShaders[i]->GetShaderName()) == 0)
					return i;

			}
		}
		LoadShader(strShader);
		return (m_lstShaders.size() - 1);
	}
	return -1;

}

void CShaderManager::LoadShader(char *strShader) {
	
	CShaderScene *pNewNode = new CShaderScene;
	pNewNode->Create(strShader);
	m_lstShaders.push_back(pNewNode);
	m_iShadersNum = m_lstShaders.size();


}