#include "externals.hh"
#include "demo.hh"
#include "sync.hh"
#include "globals.hh"


T_Demo::T_Demo( __rd__ const uint32_t width ,
		__rd__ const uint32_t height )
	: width( width ) , height( height )
{ }


bool T_Demo::initialise( )
{
	raymarcher = std::make_unique< T_Raymarcher >(
			width , height );
	dof = std::make_unique< T_DoFPass >(
			raymarcher->output( ) , raymarcher->depth( ) );
	bloom = std::make_unique< T_BloomPass >(
			raymarcher->output( ) );
	combine = std::make_unique< T_CombinePass >(
			dof->output( ) , bloom->output( ) );
	fxaa = std::make_unique< T_FXAAPass >(
			combine->output( ) );

	Globals::Sync( ).clearInputs( );
	Globals::Sync( ).addInput( "dof:sharp-distance" , 15 );
	Globals::Sync( ).addInput( "dof:sharp-range" , 5 );
	Globals::Sync( ).addInput( "dof:falloff" , 10 );
	Globals::Sync( ).addInput( "dof:max-blur" , 16 );
	Globals::Sync( ).addInput( "dof:samples" , 16 );

	// XXX test curve
	{
		T_SyncCurve curve;
		curve.name = "dof:sharp-distance";
		{
			T_SyncSegment seg;
			seg.nPoints = 4;
			seg.type = T_SyncSegment::SMOOTH;
			seg.durations.push_back( 300 );
			seg.durations.push_back( 300 );
			seg.durations.push_back( 300 );
			seg.values.push_back( 15 );
			seg.values.push_back( 30 );
			seg.values.push_back( 15 );
			seg.values.push_back( 15 );
			curve.segments.emplace_back( std::move( seg ) );
		}
		{
			T_SyncSegment seg;
			seg.nPoints = 2;
			seg.type = T_SyncSegment::LINEAR;
			seg.durations.push_back( 600 );
			seg.values.push_back( 100 );
			seg.values.push_back( 20 );
			curve.segments.emplace_back( std::move( seg ) );
		}
		Globals::Sync( ).setCurve( std::move( curve ) );
	}
	Globals::Sync( ).updateCurveCaches( );

	return true;
}

void T_Demo::makeUI( )
{
	auto const& dspSize( ImGui::GetIO( ).DisplaySize );
	ImGui::SetNextWindowSize( ImVec2( 300 , dspSize.y - 300 ) ,
			ImGuiSetCond_Once );
	ImGui::SetNextWindowPos( ImVec2( 0 , 150 ) ,
			ImGuiSetCond_Once );
	ImGui::Begin( "Demo controls" );

	raymarcher->makeUI( );
	dof->makeUI( );
	bloom->makeUI( );
	combine->makeUI( );
	fxaa->makeUI( );

	ImGui::End( );
}

void T_Demo::render( )
{
	auto& sync( Globals::Sync( ) );
	if ( playing ) {
		const float time = SDL_GetTicks( ) * 1e-3;
		if ( playingPrevious ) {
			sync.timeDelta( time - lastFrame );
			playing = !sync.finished( );
		}
		lastFrame = time;
	}
	playingPrevious = playing;

	raymarcher->render( );
	dof->render( );
	bloom->render( );
	combine->render( );
	fxaa->render( );
}

void T_Demo::handleDND(
		__rd__	ImVec2 const& move ,
		__rd__	const bool hasCtrl ,
		__rd__	const bool hasShift ,
		__rd__	const bool lmb		// Left mouse button
	)
{
	raymarcher->camera( ).handleDND( move , hasCtrl , hasShift , lmb );
}

void T_Demo::handleWheel(
		__rd__	const float wheel ,
		__rd__	const bool hasCtrl ,
		__rd__	const bool hasShift
	)
{
	raymarcher->camera( ).handleWheel( wheel , hasCtrl , hasShift );
}