/*
	Copyright (C) 2005-2007 Feeling Software Inc.
	Portions of the code are:
	Copyright (C) 2005-2007 Sony Computer Entertainment America
	
	MIT License: http://www.opensource.org/licenses/mit-license.php
*/

/**
	@file FUError.h
	This file contains the FUError class.
*/

#ifndef _FU_ERROR_H_
#define _FU_ERROR_H_

#ifndef _FU_EVENT_H_
#include "FUtils/FUEvent.h"
#endif // _FU_EVENT_H_
#ifndef _FU_CRITICAL_SECTION_H_
#include "FUtils/FUCriticalSection.h"
#endif // _FU_CRITICAL_SECTION_H_

/** Windows API defines this. */
#undef ERROR

/**
	This class deals with error message generated by FCollada.
	The constructor and the destructor are private: this class is meant to be used as a namespace.
	All error handler is wrapped around a critical section to work correctly in a multi-threaded environment.
	@ingroup FUtils
*/
class FCOLLADA_EXPORT FUError
{
public:
	/**
		Error code used to retrieve localized error message.
	*/
	enum Code
	{
		//
		// Errors
		//
		ERROR_DEFAULT_ERROR = 0, ERROR_MALFORMED_XML, ERROR_PARSING_FAILED, ERROR_INVALID_ELEMENT, ERROR_MISSING_ELEMENT, /*[0, 4]*/
		ERROR_UNKNOWN_ELEMENT, ERROR_MISSING_INPUT, ERROR_INVALID_URI, ERROR_WRITE_FILE, ERROR_MISSING_PROPERTY, /*[5, 9]*/
		NO_MATCHING_PLUGIN,

		ERROR_ANIM_CURVE_DRIVER_MISSING,
		ERROR_SOURCE_SIZE,
		ERROR_IB_MATRIX_MISSING,
		ERROR_VCOUNT_MISSING,
		ERROR_V_ELEMENT_MISSING,
		ERROR_JC_BPMC_NOT_EQUAL,
		ERROR_INVALID_VCOUNT,
		ERROR_PARSING_PROG_ERROR,
		ERROR_UNKNOWN_CHILD,
		ERROR_UNKNOWN_GEO_CH,
		ERROR_UNKNOWN_MESH_ID,
		ERROR_INVALID_U_KNOT,
		ERROR_INVALID_V_KNOT,
		ERROR_NOT_ENOUGHT_V_KNOT,
		ERROR_NOT_ENOUGHT_U_KNOT,
		ERROR_INVALID_CONTROL_VERTICES,
		ERROR_NO_CONTROL_VERTICES,
		ERROR_UNKNOWN_POLYGONS,
		WARNING_NO_POLYGON,
		ERROR_NO_VERTEX_INPUT,
		ERROR_NO_VCOUNT,
		ERROR_MISPLACED_VCOUNT,
		ERROR_UNKNOWN_PH_ELEMENT,
		ERROR_INVALID_FACE_COUNT,
		ERROR_DUPLICATE_ID,
		ERROR_INVALID_CVS_WEIGHTS,
		ERROR_INVALID_SPLINE,
		ERROR_UNKNOWN_EFFECT_CODE,
		ERROR_BAD_FLOAT_VALUE,
		ERROR_BAD_BOOLEAN_VALUE,
		ERROR_BAD_FLOAT_PARAM,
		ERROR_BAD_FLOAT_PARAM2,
		ERROR_BAD_FLOAT_PARAM3,
		ERROR_BAD_FLOAT_PARAM4,
		ERROR_BAD_MATRIX,
		ERROR_PROG_NODE_MISSING,
		ERROR_INVALID_TEXTURE_SAMPLER,
		ERROR_PARAM_NODE_MISSING,
		ERROR_INVALID_IMAGE_FILENAME,
		ERROR_UNKNOWN_TEXTURE_SAMPLER,
		ERROR_COMMON_TECHNIQUE_MISSING,
		ERROR_TECHNIQUE_NODE_MISSING,
		ERROR_PHYSICS_MODEL_CYCLE_DETECTED,

		// max only errors
		ERROR_MAX_CANNOT_RESIZE_MUT_LIST,

        //
		//Warnings
		//
		WARNING_UNSUPPORTED_TEXTURE_UVS,

		// Warnings
		WARNING_MISSING_URI_TARGET,
		WARNING_UNKNOWN_CHILD_ELEMENT,
		WARNING_UNKNOWN_AC_CHILD_ELEMENT,
		WARNING_BASE_NODE_TYPE,
		WARNING_INST_ENTITY_MISSING,
		WARNING_INVALID_MATERIAL_BINDING,
		WARNING_UNKNOWN_MAT_ID,
		WARNING_RIGID_CONSTRAINT_MISSING,
		WARNING_INVALID_ANIM_LIB,
		WARNING_INVALID_ANIM_TARGET,
		WARNING_UNKNOWN_ANIM_LIB_ELEMENT,
		WARNING_INVALID_SE_PAIR,
		WARNING_CURVES_MISSING,
		WARNING_EMPTY_ANIM_CLIP,
		WARNING_UNKNOWN_CAM_ELEMENT,
		WARNING_NO_STD_PROG_TYPE,
		WARNING_PARAM_ROOT_MISSING,
		WARNING_UNKNOWN_CAM_PROG_TYPE,
		WARNING_UNKNOWN_CAM_PARAM,
		WARNING_UNKNOWN_LIGHT_LIB_ELEMENT,
		WARNING_UNKNOWN_LIGHT_TYPE_VALUE,
		WARNING_UNKNOWN_LT_ELEMENT,
		WARNING_UNKNOWN_LIGHT_PROG_PARAM,
		WARNING_INVALID_CONTROLLER_LIB_NODE,
		WARNING_CONTROLLER_TYPE_CONFLICT,
		WARNING_SM_BASE_MISSING,
		WARNING_UNKNOWN_MC_PROC_METHOD,
		WARNING_UNKNOWN_MC_BASE_TARGET_MISSING,
		WARNING_UNKNOWN_MORPH_TARGET_TYPE,
		WARNING_TARGET_GEOMETRY_MISSING,
		WARNING_CONTROLLER_TARGET_MISSING,
		WARNING_UNKNOWN_SC_VERTEX_INPUT,
		WARNING_INVALID_TARGET_GEOMETRY_OP,
		WARNING_INVALID_JOINT_INDEX,
		WARNING_INVALID_WEIGHT_INDEX,
		WARNING_UNKNOWN_JOINT,
		WARNING_UNKNOWN_GL_ELEMENT,
		WARNING_EMPTY_GEOMETRY,
		WARNING_MESH_VERTICES_MISSING,
		WARNING_VP_INPUT_NODE_MISSING,
		WARNING_GEOMETRY_VERTICES_MISSING,
		WARNING_MESH_TESSELLATION_MISSING,
		WARNING_INVALID_POLYGON_MAT_SYMBOL,
		WARNING_EXTRA_VERTEX_INPUT,
		WARNING_UNKNOWN_POLYGONS_INPUT,
		WARNING_UNKNOWN_POLYGON_CHILD,
		WARNING_INVALID_PRIMITIVE_COUNT,
		WARNING_INVALID_GEOMETRY_SOURCE_ID,
		WARNING_EMPTY_SOURCE,
		WARNING_EMPTY_POLYGONS,
		WARNING_SPLINE_CONTROL_INPUT_MISSING,
		WARNING_CONTROL_VERTICES_MISSING,
		WARNING_VARYING_SPLINE_TYPE,
		WARNING_UNKNOWN_EFFECT_ELEMENT,
		WARNING_UNSUPPORTED_PROFILE,
		WARNING_SID_MISSING,
		WARNING_INVALID_ANNO_TYPE,
		WARNING_GEN_REF_ATTRIBUTE_MISSING,
		WARNING_MOD_REF_ATTRIBUTE_MISSING,
		WARNING_SAMPLER_NODE_MISSING,
		WARNING_EMPTY_SURFACE_SOURCE,
		WARNING_EMPTY_INIT_FROM,
		WARNING_EMPTY_IMAGE_NAME,
		WARNING_UNKNOWN_PASS_ELEMENT,
		WARNING_UNKNOWN_PASS_SHADER_ELEMENT,
		WARNING_UNAMED_EFFECT_PASS_SHADER,
		WARNING_UNKNOWN_EPS_STAGE,
		WARNING_INVALID_PROFILE_INPUT_NODE,
		WARNING_UNKNOWN_STD_MAT_BASE_ELEMENT,
		WARNING_TECHNIQUE_MISSING,
		WARNING_UNKNOWN_MAT_INPUT_SEMANTIC,
		WARNING_UNKNOWN_INPUT_TEXTURE,
		WARNING_UNSUPPORTED_SHADER_TYPE,
		WARNING_UNKNOWN_MAT_PARAM_NAME,
		WARNING_UNKNOWN_TECHNIQUE_ELEMENT,
		WARNING_UNKNOWN_IMAGE_LIB_ELEMENT,
		WARNING_UNKNOWN_TEX_LIB_ELEMENT,
		WARNING_UNKNOWN_CHANNEL_USAGE,
		WARNING_UNKNOWN_INPUTE_SEMANTIC,
		WARNING_UNKNOWN_IMAGE_SOURCE,
		WARNING_UNKNOWN_MAT_LIB_ELEMENT,
		WARNING_UNSUPPORTED_REF_EFFECTS,
		WARNING_EMPTY_INSTANCE_EFFECT,
		WARNING_EFFECT_MISSING,
		WARNING_UNKNOWN_FORCE_FIELD_ELEMENT,
		WARNING_UNKNOWN_ELEMENT,
		WARNING_INVALID_BOX_TYPE,
		WARNING_INVALID_PLANE_TYPE,
		WARNING_INVALID_SPHERE_TYPE,
		WARNING_INVALID_CAPSULE_TYPE,
		WARNING_INVALID_TCAPSULE_TYPE,
		WARNING_INVALID_TCYLINDER_TYPE,
		WARNING_UNKNOWN_PHYS_MAT_LIB_ELEMENT,
		WARNING_UNKNOWN_PHYS_LIB_ELEMENT,
		WARNING_CORRUPTED_INSTANCE,
		WARNING_UNKNOWN_PRB_LIB_ELEMENT,
		WARNING_PHYS_MAT_INST_MISSING,
		WARNING_PHYS_MAT_DEF_MISSING,
		WARNING_UNKNOWN_RGC_LIB_ELEMENT,
		WARNING_INVALID_NODE_TRANSFORM,
		WARNING_RF_NODE_MISSING,
		WARNING_RF_REF_NODE_MISSING,
		WARNING_TARGET_BS_NODE_MISSING,
		WARNING_TARGE_BS_REF_NODE_MISSING,
		WARNING_UNKNOW_PS_LIB_ELEMENT,
		WARNING_FCDGEOMETRY_INST_MISSING,
		WARNING_INVALID_SHAPE_NODE,
		WARNING_SHAPE_NODE_MISSING,
		WARNING_UNKNOW_NODE_ELEMENT_TYPE,
		WARNING_CYCLE_DETECTED,
		WARNING_INVALID_NODE_INST,
		WARNING_INVALID_WEAK_NODE_INST,
		WARNING_UNSUPPORTED_EXTERN_REF,
		WARNING_UNEXPECTED_ASSET,
		WARNING_INVALID_TRANSFORM,
		WARNING_TARGET_SCENE_NODE_MISSING,
		WARNING_UNSUPPORTED_EXTERN_REF_NODE,
		WARNING_XREF_UNASSIGNED,
		WARNING_MASS_AND_DENSITY_MISSING,

		//
		//Debug
		//
		DEBUG_LOAD_SUCCESSFUL,
		DEBUG_WRITE_SUCCESSFUL,

		ERROR_CUSTOM_STRING = 5000
	};

	/**
		Error level defines supported error message levels in FCollada
	*/
	enum Level
	{
		DEBUG_LEVEL = 0,
		WARNING_LEVEL = 1,
		ERROR_LEVEL = 2,

		LEVEL_COUNT
	};

	/** Callback functor definition. */
	typedef IFunctor3<FUError::Level, uint32, uint32, void> FUErrorFunctor;

private:
	static FUCriticalSection criticalSection;
	static FUEvent3<FUError::Level, uint32, uint32> onErrorEvent;
	static FUEvent3<FUError::Level, uint32, uint32> onWarningEvent;
	static FUEvent3<FUError::Level, uint32, uint32> onDebugEvent;
	static fm::string customErrorString;
	static FUError::Level fatalLevel;

	// This class is not meant to be constructed.
	FUError();
	~FUError();

public:
	/** Logs and error message.
		@param errorLevel The error level of this error. Different callback is 
		called for corresponding error level.
		@param errorCode The error code for the error message
		@param line The line number to indicate where the error has occured
		@return Whether the error is non-fatal. */
	static bool Error(FUError::Level errorLevel, uint32 errorCode, uint32 line = 0);

	/** Add callback for error messages.
		@param errorLevel The error level whose callback is to be set.
		@param callback Callback to be called when FCollada generates error message. */
	static void AddErrorCallback(FUError::Level errorLevel, FUErrorFunctor* callback);

	/** Adds a new callback that handles the event.
		@param errorLevel The error level whose callback is to be set.
		@param handle The object that contains the member function.
		@param _function The member function to callback. */
	template <class Class>
	static void AddErrorCallback(FUError::Level errorLevel, Class* handle, void (Class::*_function)(FUError::Level, uint32, uint32))
	{
		AddErrorCallback(errorLevel, new FUFunctor3<Class, FUError::Level, uint32, uint32, void>(handle, _function));
	}

	/** Adds a new callback that handles the event.
		@param errorLevel The error level whose callback is to be set.
		@param _function The static function to callback. */
	static void AddErrorCallback(FUError::Level errorLevel, void (*_function)(FUError::Level, uint32, uint32))
	{
		AddErrorCallback(errorLevel, new FUStaticFunctor3<FUError::Level, uint32, uint32, void>(_function));
	}

	/** Removes and releases a callback for error messages.
		@param errorLevel The error level whose callback is to be removed.
		@param object The object that contains the callback.
		@param function Callback that was registered to be called when FCollada generates error message. */
	static void RemoveErrorCallback(FUError::Level errorLevel, void* object, void* function);

	/** Removes and releases a callback for error messages.
		@param errorLevel The error level whose callback is to be removed.
		@@param handle The object that contains the member function.
		@param _function The member function callback to unregister. */
	template <class Class>
	static void RemoveErrorCallback(FUError::Level errorLevel, Class* handle, void (Class::*_function)(FUError::Level, uint32, uint32))
	{
		void* function = *(void**)(size_t)&_function;
		RemoveErrorCallback(errorLevel, (void*) handle, function);
	}

	/** Removes and releases a static callback for error messages.
		@param errorLevel The error level whose callback is to be removed.
		@@param _function The static function callback to unregister. */
	static void RemoveErrorCallback(FUError::Level errorLevel, void (*_function)(FUError::Level, uint32, uint32))
	{
		void* function = *(void**)(size_t)&_function;
		RemoveErrorCallback(errorLevel, NULL, function);
	}

	/** Retrieves the string description of the error code
		@param errorCode The error code whose string description is to be obtained.
		@Return The string description in raw pointer to array of characters. */
	static const char* GetErrorString(FUError::Code errorCode);

	/** Sets the error string for the custom error (ERROR_CUSTOM_STRING)
		Used mainly for the FUDebug structure. We encourage applications
		to also use it in conjunction with the FUErrorLog class.
		@param customErrorString. */
	static void SetCustomErrorString(const char* customErrorString);

	/** Retrieves the level at which errors are considered fatal.
		@return The fatality level. */
	static FUError::Level GetFatalityLevel() { return fatalLevel; }

	/** Sets the level at which errors will cancel the processing of a COLLADA document.
		@param _fatalLevel The fatality level. Is it highly recommended to leave this value at 'FUError::ERROR_LEVEL'. */
	static void SetFatalityLevel(FUError::Level _fatalLevel) { fatalLevel = _fatalLevel; }
};

/**
	This class is used as an example of error-handling.
	It simply retrieves and concatenates the english error strings.

	@ingroup FUtils
*/
class FCOLLADA_EXPORT FUErrorSimpleHandler
{
private:
	FUSStringBuilder message;
	FUError::Level localFatalityLevel;
	bool fails;

public:
	/** Constructor.
		@param fatalLevel The minimum error level which will cause the simple handler to
			consider the process to be a failure. */
	FUErrorSimpleHandler(FUError::Level fatalLevel = FUError::ERROR_LEVEL);

	/** Destructor. */
	~FUErrorSimpleHandler();

	/** Retrieves the complete error string.
		The complete error string is the concatenation of all the indivual
		errors encountered.
		@see FUError::GetErrorString
		@return The complete error string. */
	inline const char* GetErrorString() const { return message.ToCharPtr(); }

	/** Retrieves whether the process was successful.
		@return Whether the process was successful. */
	inline bool IsSuccessful() const { return !fails; }

private:
	void OnError(FUError::Level errorLevel, uint32 errorCode, uint32 lineNumber);
};

#endif // _FU_ERROR_H_