#include <algorithm>

#include "defines.h"
#include "Session.h"

Session::Session()
{

}
Session::~Session()
{
    // TODO delete all sources
    for(auto it = sources_.begin(); it != sources_.end(); ) {
        // delete source
        delete (*it);
        // erase this iterator from the list
        it = sources_.erase(it);
    }
}

// update all sources
void Session::update(float dt)
{
    // render of all sources
    for( SourceList::iterator it = sources_.begin(); it != sources_.end(); it++){
        (*it)->render( );
    }

    render_.update(dt);

    // always draw render view
    render_.draw();
}


SourceList::iterator Session::addSource(Source *s)
{
    // insert the source in the rendering
    render_.scene.root()->addChild(s->group(View::RENDERING));
    // insert the source to the beginning of the list
    sources_.push_front(s);
    // return the iterator to the source created at the beginning
    return sources_.begin();
}

SourceList::iterator Session::deleteSource(Source *s)
{
    // find the source
    SourceList::iterator its = find(s);
    // ok, its in the list !
    if (its != sources_.end()) {
        // iterate backward to previous element in the list (hopefully exist)
        its--;

        // remove the source and delete it
        sources_.remove(s);
        delete s;

        // return
        return its;
    }

    return sources_.end();
}


SourceList::iterator Session::begin()
{
    return sources_.begin();
}

SourceList::iterator Session::end()
{
    return sources_.end();
}

SourceList::iterator Session::find(int index)
{
    int i = 0;
    SourceList::iterator it = sources_.begin();
    while ( i < index && it != sources_.end() ){
        i++;
        it++;
    }
    return it;
}

SourceList::iterator Session::find(Source *s)
{
    return std::find(sources_.begin(), sources_.end(), s);
}

SourceList::iterator Session::find(std::string namesource)
{
    return std::find_if(sources_.begin(), sources_.end(), hasName(namesource));
}

SourceList::iterator Session::find(Node *node)
{
    return std::find_if(sources_.begin(), sources_.end(), hasNode(node));
}

uint Session::numSource() const
{
    return sources_.size();
}