//
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
//
// This software is provided 'as-is', without any express or implied
// warranty.  In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
//

#ifndef RECASTSAMPLE_H
#define RECASTSAMPLE_H

#include "DebugDraw.h"
#include "RecastDump.h"
#include "DetourNavMesh.h"


// These are just sample areas to use consistent values across the samples.
// The use should specify these base on his needs.
enum SamplePolyAreas
{
	SAMPLE_POLYAREA_GROUND,
	SAMPLE_POLYAREA_WATER,
	SAMPLE_POLYAREA_ROAD,
	SAMPLE_POLYAREA_DOOR,
	SAMPLE_POLYAREA_GRASS,
	SAMPLE_POLYAREA_JUMP,
};
enum SamplePolyFlags
{
	SAMPLE_POLYFLAGS_WALK = 0x01,		// Ability to walk (ground, grass, road)
	SAMPLE_POLYFLAGS_SWIM = 0x02,		// Ability to swim (water).
	SAMPLE_POLYFLAGS_DOOR = 0x04,		// Ability to move through doors.
	SAMPLE_POLYFLAGS_JUMP = 0x08,		// Ability to jump.
	SAMPLE_POLYFLAGS_ALL = 0xffff		// All abilities.
};


// OpenGL debug draw implementation.
class DebugDrawGL : public duDebugDraw
{
public:
	virtual void depthMask(bool state);
	virtual void begin(duDebugDrawPrimitives prim, float size = 1.0f);
	virtual void vertex(const float* pos, unsigned int color);
	virtual void vertex(const float x, const float y, const float z, unsigned int color);
	virtual void end();
};

// stdio file implementation.
class FileIO : public duFileIO
{
	FILE* m_fp;
	int m_mode;
public:
	FileIO();
	virtual ~FileIO();
	bool openForWrite(const char* path);
	bool openForRead(const char* path);
	virtual bool isWriting() const;
	virtual bool isReading() const;
	virtual bool write(const void* ptr, const size_t size);
	virtual bool read(void* ptr, const size_t size);
};

// Tool types.
enum SampleToolType
{
	TOOL_NONE = 0,
	TOOL_TILE_EDIT,
	TOOL_TILE_HIGHLIGHT,
	TOOL_NAVMESH_TESTER,
	TOOL_OFFMESH_CONNECTION,
	TOOL_CONVEX_VOLUME,
};

struct SampleTool
{
	virtual ~SampleTool() {}
	virtual int type() = 0;
	virtual void init(class Sample* sample) = 0;
	virtual void reset() = 0;
	virtual void handleMenu() = 0;
	virtual void handleClick(const float* p, bool shift) = 0;
	virtual void handleRender() = 0;
	virtual void handleRenderOverlay(double* proj, double* model, int* view) = 0;
	virtual void handleStep() = 0;
};


class Sample
{
protected:
	class InputGeom* m_geom;
	dtNavMesh* m_navMesh;
	unsigned char m_navMeshDrawFlags;

	float m_cellSize;
	float m_cellHeight;
	float m_agentHeight;
	float m_agentRadius;
	float m_agentMaxClimb;
	float m_agentMaxSlope;
	float m_regionMinSize;
	float m_regionMergeSize;
	float m_edgeMaxLen;
	float m_edgeMaxError;
	float m_vertsPerPoly;
	float m_detailSampleDist;
	float m_detailSampleMaxError;
	
	SampleTool* m_tool;
	
public:
	Sample();
	virtual ~Sample();
	
	void setTool(SampleTool* tool);
	
	virtual void handleSettings();
	virtual void handleTools();
	virtual void handleDebugMode();
	virtual void handleClick(const float* p, bool shift);
	virtual void handleStep();
	virtual void handleRender();
	virtual void handleRenderOverlay(double* proj, double* model, int* view);
	virtual void handleMeshChanged(class InputGeom* geom);
	virtual bool handleBuild();

	virtual class InputGeom* getInputGeom() { return m_geom; }
	virtual class dtNavMesh* getNavMesh() { return m_navMesh; }
	virtual float getAgentRadius() { return m_agentRadius; }
	virtual float getAgentHeight() { return m_agentHeight; }
	virtual float getAgentClimb() { return m_agentMaxClimb; }
	virtual const float* getBoundsMin();
	virtual const float* getBoundsMax();
	
	inline unsigned char getNavMeshDrawFlags() const { return m_navMeshDrawFlags; }
	inline void setNavMeshDrawFlags(unsigned char flags) { m_navMeshDrawFlags = flags; }

	void resetCommonSettings();
	void handleCommonSettings();
};


#endif // RECASTSAMPLE_H