/*
---------------------------------------------------------------------------
Free Asset Import Library (ASSIMP)
---------------------------------------------------------------------------

Copyright (c) 2006-2008, ASSIMP Development Team

All rights reserved.

Redistribution and use of this software in source and binary forms, 
with or without modification, are permitted provided that the following 
conditions are met:

* Redistributions of source code must retain the above
  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
  materials provided with the distribution.

* Neither the name of the ASSIMP team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/

#if (!defined AV_DISPLAY_H_INCLUDED)
#define AV_DISPLAY_H_INCLUDE

// see CDisplay::m_aiImageList
#define AI_VIEW_IMGLIST_NODE			0x0
#define AI_VIEW_IMGLIST_MATERIAL		0x1
#define AI_VIEW_IMGLIST_TEXTURE			0x2
#define AI_VIEW_IMGLIST_TEXTURE_INVALID 0x3
#define AI_VIEW_IMGLIST_MODEL			0x4

//-------------------------------------------------------------------------------
/* Corresponds to the "Display" combobox in the UI
*/
//-------------------------------------------------------------------------------
class CDisplay
	{
private:

	// default constructor
	CDisplay() 
		:	m_iViewMode(VIEWMODE_FULL), 
			m_pcCurrentTexture(NULL),
			m_pcCurrentNode(NULL),
			m_pcCurrentMaterial(NULL),
			m_hImageList(NULL),
			m_hRoot(NULL),
			m_fTextureZoom(1000.0f)
	{
		this->m_aiImageList[0] = 0;
		this->m_aiImageList[1] = 1;
		this->m_aiImageList[2] = 2;
		this->m_aiImageList[3] = 3;
		this->m_aiImageList[4] = 4;
	}

public:


	//------------------------------------------------------------------
	enum 
	{
		// the full model is displayed
		VIEWMODE_FULL,

		// a material is displayed on a simple spjere as model
		VIEWMODE_MATERIAL,

		// a texture with an UV set mapped on it is displayed
		VIEWMODE_TEXTURE,

		// a single node in the scenegraph is displayed
		VIEWMODE_NODE,
	};


	//------------------------------------------------------------------
	// represents a texture in the tree view
	struct TextureInfo
	{
		// texture info
		IDirect3DTexture9* piTexture;

		// Blend factor of the texture
		float fBlend;

		// blend operation for the texture
		aiTextureOp eOp;

		// UV index for the texture
		unsigned int iUV;

		// Associated tree item
		HTREEITEM hTreeItem;

		// Original path to the texture
		std::string szPath;

		// index of the corresponding material
		unsigned int iMatIndex;

		// type of the texture
		unsigned int iType;
	};

	//------------------------------------------------------------------
	// represents a node in the tree view
	struct NodeInfo
	{
		// node object
		aiNode* psNode;

		// corresponding tree view item
		HTREEITEM hTreeItem;
	};

	//------------------------------------------------------------------
	// represents a material in the tree view
	struct MaterialInfo
	{
		// material index
		unsigned int iIndex;

		// material object
		aiMaterial* psMaterial;

		// ID3DXEffect interface
		ID3DXEffect* piEffect;

		// corresponding tree view item
		HTREEITEM hTreeItem;
	};

	//------------------------------------------------------------------
	// Singleton accessors
	static CDisplay s_cInstance;
	inline static CDisplay& Instance ()
		{
		return s_cInstance;
		}


	//------------------------------------------------------------------
	// Called during the render loop. Renders the scene (including the 
	// HUD etc) in the current view mode
	int OnRender();

	//------------------------------------------------------------------
	// called when the user selects another item in the "Display" tree 
	// view the method determines the new view mode and performs all 
	// required operations
	// \param p_hTreeItem Selected tree view item
	int OnSetup(HTREEITEM p_hTreeItem);

	//------------------------------------------------------------------
	// Variant 1: Render the full scene with the asset
	int RenderFullScene();

#if 0
	//------------------------------------------------------------------
	// Variant 2: Render only a part of the scene. One node to
	// be exact
	int RenderScenePart();
#endif

	//------------------------------------------------------------------
	// Variant 3: Render a large sphere and map a given material on it
	int RenderMaterialView();

	//------------------------------------------------------------------
	// Variant 4: Render a flat plane, map a texture on it and
	// display the UV wire on it
	int RenderTextureView();

	//------------------------------------------------------------------
	// Fill the UI combobox with a list of all supported view modi
	//
	// The display modes are added in order
	int FillDisplayList(void);

	//------------------------------------------------------------------
	// Add a material and all sub textures to the display mode list
	// hRoot - Handle to the root of the tree view
	// iIndex - Material index
	int AddMaterialToDisplayList(HTREEITEM hRoot, 
		unsigned int iIndex);

	//------------------------------------------------------------------
	// Add a texture to the display list
	// pcMat - material containing the texture
	// hTexture - Handle to the material tree item
	// szPath - Path to the texture
	// iUVIndex - UV index to be used for the texture
	// fBlendFactor - Blend factor to be used for the texture
	// eTextureOp - texture operation to be used for the texture
	int AddTextureToDisplayList(unsigned int iType,
		unsigned int iIndex,
		const aiString* szPath,
		HTREEITEM hFX, 
		unsigned int iUVIndex		= 0,
		const float fBlendFactor	= 0.0f,
		aiTextureOp eTextureOp		= aiTextureOp_Multiply,
		unsigned int iMesh			= 0);

	//------------------------------------------------------------------
	// Add a node to the display list
	// Recusrivly add all subnodes
	// iIndex - Index of the node in the parent's child list
	// iDepth - Current depth of the node
	// pcNode - Node object
	// hRoot - Parent tree view node
	int AddNodeToDisplayList(
		unsigned int iIndex, 
		unsigned int iDepth,
		aiNode* pcNode,
		HTREEITEM hRoot);

	//------------------------------------------------------------------
	// Load the image list for the tree view item
	int LoadImageList(void);

	//------------------------------------------------------------------
	// Expand all nodes in the tree 
	int ExpandTree();

	//------------------------------------------------------------------
	// Fill the UI combobox with a list of all supported animations
	// The animations are added in order
	int FillAnimList(void);

	//------------------------------------------------------------------
	// Clear the combox box containing the list of animations
	int ClearAnimList(void);

	//------------------------------------------------------------------
	// Clear the combox box containing the list of scenegraph items
	int ClearDisplayList(void);

	//------------------------------------------------------------------
	// Fill in the default statistics
	int FillDefaultStatistics(void);

	//------------------------------------------------------------------
	// Called by LoadAsset()
	// reset the class instance to the default values
	int Reset(void);

	//------------------------------------------------------------------
	// Replace the texture that is current selected with
	// a new texture
	int ReplaceCurrentTexture(const char* szPath);

	//------------------------------------------------------------------
	// Display the context menu (if there) for the specified tree item
	// hItem Valid tree view item handle
	int ShowTreeViewContextMenu(HTREEITEM hItem);

	//------------------------------------------------------------------
	// Event handling for pop-up menus displayed by th tree view
	int HandleTreeViewPopup(WPARAM wParam,LPARAM lParam);

	//------------------------------------------------------------------
	// setter for m_iViewMode
	inline void SetViewMode(unsigned int p_iNew)
	{
		this->m_iViewMode = p_iNew;
	}

	//------------------------------------------------------------------
	// getter for m_iViewMode
	inline unsigned int GetViewMode()
	{
		return m_iViewMode;
	}

	//------------------------------------------------------------------
	// change the texture view's zoom factor
	inline void SetTextureViewZoom(float f)
	{
		// FIX: Removed log(), seems to make more problems than it fixes
		this->m_fTextureZoom += f* 15;
		if (this->m_fTextureZoom < 0.05f)this->m_fTextureZoom = 0.05f;
	}

	//------------------------------------------------------------------
	// change the texture view's offset on the x axis
	inline void SetTextureViewOffsetX(float f)
	{
		this->m_vTextureOffset.x += f;
	}

	//------------------------------------------------------------------
	// change the texture view's offset on the y axis
	inline void SetTextureViewOffsetY(float f)
	{
		this->m_vTextureOffset.y += f;
	}

	//------------------------------------------------------------------
	// add a new texture to the list
	inline void AddTexture(const TextureInfo& info)
	{
		this->m_asTextures.push_back(info);
	}

	//------------------------------------------------------------------
	// add a new node to the list
	inline void AddNode(const NodeInfo& info)
	{
		this->m_asNodes.push_back(info);
	}

	//------------------------------------------------------------------
	// add a new material to the list
	inline void AddMaterial(const MaterialInfo& info)
	{
		this->m_asMaterials.push_back(info);
	}

private:

	//------------------------------------------------------------------
	// Render a screen-filling square using the checker pattern shader
	int RenderPatternBG();

	//------------------------------------------------------------------
	// Render a given node in the scenegraph
	// piNode Node to be rendered
	// piMatrix Current transformation matrix
	// bAlpha Render alpha or opaque objects only?
	int RenderNode (aiNode* piNode,const aiMatrix4x4& piMatrix,
		bool bAlpha = false);

	//------------------------------------------------------------------
	// Setup the camera for the stereo view rendering mode
	int SetupStereoView();

	//------------------------------------------------------------------
	// Render the second view (for the right eye) in stereo mod
	// m - World matrix
	int RenderStereoView(const aiMatrix4x4& m);

	//------------------------------------------------------------------
	// Handle user input
	int HandleInput();

	//------------------------------------------------------------------
	// Handle user input for the texture viewer
	int HandleInputTextureView();

	//------------------------------------------------------------------
	// Handle user input if no asset is loaded
	int HandleInputEmptyScene();

	//------------------------------------------------------------------
	// Draw the HUD (call only if FPS mode isn't active)
	int DrawHUD();

	//------------------------------------------------------------------
	// Used by OnSetup().
	// Do everything necessary to switch to texture view mode
	int OnSetupTextureView(TextureInfo* pcNew);

	//------------------------------------------------------------------
	// Used by OnSetup().
	// Do everything necessary to switch to material view mode
	int OnSetupMaterialView(MaterialInfo* pcNew);

	//------------------------------------------------------------------
	// Used by OnSetup().
	// Do everything necessary to switch to node view mode
	int OnSetupNodeView(NodeInfo* pcNew);

	//------------------------------------------------------------------
	// Used by OnSetup().
	// Do everything necessary to switch back to normal view mode
	int OnSetupNormalView();

	//------------------------------------------------------------------
	// Used by HandleTreeViewPopup().
	int HandleTreeViewPopup2(WPARAM wParam,LPARAM lParam);

private:

	// view mode
	unsigned int m_iViewMode;

	// List of all textures in the display CB
	std::vector<TextureInfo> m_asTextures;

	// current texture or NULL if no texture is active
	TextureInfo* m_pcCurrentTexture;

	// List of all node in the display CB
	std::vector<NodeInfo> m_asNodes;

	// current Node or NULL if no Node is active
	NodeInfo* m_pcCurrentNode;

	// List of all materials in the display CB
	std::vector<MaterialInfo> m_asMaterials;

	// current material or NULL if no material is active
	MaterialInfo* m_pcCurrentMaterial;

	// indices into the image list of the "display" tree view control
	unsigned int m_aiImageList[5]; /* = {0,1,2,3,4};*/

	// Image list
	HIMAGELIST m_hImageList;

	// Root node of the tree, "Model"
	HTREEITEM m_hRoot;

	// Current zoom factor of the texture viewer
	float m_fTextureZoom;

	// Current offset (in pixels) of the texture viewer
	aiVector2D m_vTextureOffset;
	};

#endif // AV_DISPLAY_H_INCLUDE