/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------

Copyright (c) 2006-2020, assimp 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 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.
---------------------------------------------------------------------------
*/

/** @file  Main.cpp
 *  @brief main() function of assimp_cmd
 */

#include "Main.h"

const char* AICMD_MSG_ABOUT = 
"------------------------------------------------------ \n"
"Open Asset Import Library (\"Assimp\", https://github.com/assimp/assimp) \n"
" -- Commandline toolchain --\n"
"------------------------------------------------------ \n\n"

"Version %i.%i %s%s%s%s%s(GIT commit %x)\n\n";

const char* AICMD_MSG_HELP = 
"assimp <verb> <parameters>\n\n"
" verbs:\n"
" \tinfo       - Quick file stats\n"
" \tlistext    - List all known file extensions available for import\n"
" \tknowext    - Check whether a file extension is recognized by Assimp\n"
#ifndef ASSIMP_BUILD_NO_EXPORT
" \texport     - Export a file to one of the supported output formats\n"
" \tlistexport - List all supported export formats\n"
" \texportinfo - Show basic information on a specific export format\n"
#endif
" \textract    - Extract embedded texture images\n"
" \tdump       - Convert models to a binary or textual dump (ASSBIN/ASSXML)\n"
" \tcmpdump    - Compare dumps created using \'assimp dump <file> -s ...\'\n"
" \tversion    - Display Assimp version\n"
"\n Use \'assimp <verb> --help\' for detailed help on a command.\n"
;

/*extern*/ Assimp::Importer* globalImporter = NULL;

#ifndef ASSIMP_BUILD_NO_EXPORT
/*extern*/ Assimp::Exporter* globalExporter = NULL;
#endif

// ------------------------------------------------------------------------------
// Application entry point
int main (int argc, char* argv[])
{
	if (argc <= 1)	{
		printf("assimp: No command specified. Use \'assimp help\' for a detailed command list\n");
		return AssimpCmdError::Success;
	}

	// assimp version
	// Display version information
	if (! strcmp(argv[1], "version")) {
		const unsigned int flags = aiGetCompileFlags();
		printf(AICMD_MSG_ABOUT,
			aiGetVersionMajor(),
			aiGetVersionMinor(),
			(flags & ASSIMP_CFLAGS_DEBUG ?			"-debug "   : ""),
			(flags & ASSIMP_CFLAGS_NOBOOST ?		"-noboost " : ""),
			(flags & ASSIMP_CFLAGS_SHARED ?			"-shared "  : ""),
			(flags & ASSIMP_CFLAGS_SINGLETHREADED ? "-st "      : ""),
			(flags & ASSIMP_CFLAGS_STLPORT ?		"-stlport " : ""),
			aiGetVersionRevision());

		return AssimpCmdError::Success;
	}

	// assimp help
	// Display some basic help (--help and -h work as well 
	// because people could try them intuitively)
	if (!strcmp(argv[1], "help") || !strcmp(argv[1], "--help") || !strcmp(argv[1], "-h")) {
		printf("%s",AICMD_MSG_HELP);
		return AssimpCmdError::Success;
	}

	// assimp cmpdump
	// Compare two mini model dumps (regression suite) 
	if (! strcmp(argv[1], "cmpdump")) {
		return Assimp_CompareDump (&argv[2],argc-2);
	}

	// construct global importer and exporter instances
	Assimp::Importer imp;
	imp.SetPropertyBool("GLOB_MEASURE_TIME",true);
	globalImporter = &imp;

#ifndef ASSIMP_BUILD_NO_EXPORT
	// 
	Assimp::Exporter exp;
	globalExporter = &exp;
#endif

	// assimp listext
	// List all file extensions supported by Assimp
	if (! strcmp(argv[1], "listext")) {
		aiString s;
		imp.GetExtensionList(s);

		printf("%s\n",s.data);
		return AssimpCmdError::Success;
	}

#ifndef ASSIMP_BUILD_NO_EXPORT
	// assimp listexport
	// List all export file formats supported by Assimp (not the file extensions, just the format identifiers!)
	if (! strcmp(argv[1], "listexport")) {
		aiString s;
		
		for(size_t i = 0, end = exp.GetExportFormatCount(); i < end; ++i) {
			const aiExportFormatDesc* const e = exp.GetExportFormatDescription(i);
			s.Append( e->id );
			if (i!=end-1) {
				s.Append("\n");
			}
		}

		printf("%s\n",s.data);
		return AssimpCmdError::Success;
	}


	// assimp exportinfo
	// stat an export format
	if (! strcmp(argv[1], "exportinfo")) {
		aiString s;

		if (argc<3) {
			printf("Expected file format id\n");
			return AssimpCmdError::NoFileFormatSpecified;
		}

		for(size_t i = 0, end = exp.GetExportFormatCount(); i < end; ++i) {
			const aiExportFormatDesc* const e = exp.GetExportFormatDescription(i);
			if (!strcmp(e->id,argv[2])) {
				printf("%s\n%s\n%s\n",e->id,e->fileExtension,e->description);
				return AssimpCmdError::Success;
			}
		}
		
		printf("Unknown file format id: \'%s\'\n",argv[2]);
		return AssimpCmdError::UnknownFileFormat;
	}

	// assimp export
	// Export a model to a file
	if (! strcmp(argv[1], "export")) {
		return Assimp_Export (&argv[2],argc-2);
	}

#endif

	// assimp knowext
	// Check whether a particular file extension is known by us, return 0 on success
	if (! strcmp(argv[1], "knowext")) {
		if (argc<3) {
			printf("Expected file extension");
			return AssimpCmdError::NoFileExtensionSpecified;
		}
		const bool b = imp.IsExtensionSupported(argv[2]);
		printf("File extension \'%s\'  is %sknown\n",argv[2],(b?"":"not "));
		return b? AssimpCmdError::Success : AssimpCmdError::UnknownFileExtension;
	}

	// assimp info
	// Print basic model statistics
	if (! strcmp(argv[1], "info")) {
		return Assimp_Info ((const char**)&argv[2],argc-2);
	}

	// assimp dump 
	// Dump a model to a file 
	if (! strcmp(argv[1], "dump")) {
		return Assimp_Dump (&argv[2],argc-2);
	}

	// assimp extract 
	// Extract an embedded texture from a file
	if (! strcmp(argv[1], "extract")) {
		return Assimp_Extract (&argv[2],argc-2);
	}

	// assimp testbatchload
	// Used by /test/other/streamload.py to load a list of files
	// using the same importer instance to check for incompatible
	// importers.
	if (! strcmp(argv[1], "testbatchload")) {
		return Assimp_TestBatchLoad (&argv[2],argc-2);
	}

	printf("Unrecognized command. Use \'assimp help\' for a detailed command list\n");
	return AssimpCmdError::UnrecognizedCommand;
}


// ------------------------------------------------------------------------------
void SetLogStreams(const ImportData& imp)
{
	printf("\nAttaching log stream   ...           OK\n");
		
	unsigned int flags = 0;
	if (imp.logFile.length()) {
		flags |= aiDefaultLogStream_FILE;
	}
	if (imp.showLog) {
		flags |= aiDefaultLogStream_STDERR;
	}
	DefaultLogger::create(imp.logFile.c_str(),imp.verbose ? Logger::VERBOSE : Logger::NORMAL,flags);
}


// ------------------------------------------------------------------------------
void FreeLogStreams()
{
	DefaultLogger::kill();
}


// ------------------------------------------------------------------------------
void PrintHorBar()
{
	printf("-----------------------------------------------------------------\n");
}

// ------------------------------------------------------------------------------
// Import a specific file
const aiScene* ImportModel(
	const ImportData& imp, 
	const std::string& path)
{
	// Attach log streams
	if (imp.log) {
		SetLogStreams(imp);
	}
	printf("Launching asset import ...           OK\n");

	// Now validate this flag combination
	if(!globalImporter->ValidateFlags(imp.ppFlags)) {
		printf("ERROR: Unsupported post-processing flags \n");
		return NULL;
	}
	printf("Validating postprocessing flags ...  OK\n");
	if (imp.showLog) {
		PrintHorBar();
	}
		

	// do the actual import, measure time
	const clock_t first = clock();
	const aiScene* scene = globalImporter->ReadFile(path,imp.ppFlags);

	if (imp.showLog) {
		PrintHorBar();
	}
	if (!scene) {
		printf("ERROR: Failed to load file: %s\n", globalImporter->GetErrorString());
		return NULL;
	}

	const clock_t second = ::clock();
	const double seconds = static_cast<double>(second-first) / CLOCKS_PER_SEC;

	printf("Importing file ...                   OK \n   import took approx. %.5f seconds\n"
		"\n",seconds);

	if (imp.log) { 
		FreeLogStreams();
	}
	return scene;
}

#ifndef ASSIMP_BUILD_NO_EXPORT
// ------------------------------------------------------------------------------
bool ExportModel(const aiScene* pOut,  
	const ImportData& imp, 
	const std::string& path,
	const char* pID)
{
	// Attach log streams
	if (imp.log) {
		SetLogStreams(imp);
	}
	printf("Launching asset export ...           OK\n");

	if (imp.showLog) {
		PrintHorBar();
	}

	// do the actual export, measure time
	const clock_t first = clock();
	const aiReturn res = globalExporter->Export(pOut,pID,path);

	if (imp.showLog) {
		PrintHorBar();
	}
	if (res != AI_SUCCESS) {
		printf("Failed to write file\n");
		printf("ERROR: %s\n", globalExporter->GetErrorString());
		return false;
	}

	const clock_t second = ::clock();
	const double seconds = static_cast<double>(second-first) / CLOCKS_PER_SEC;

	printf("Exporting file ...                   OK \n   export took approx. %.5f seconds\n"
		"\n",seconds);

	if (imp.log) { 
		FreeLogStreams();
	}

	return true;
}
#endif

// ------------------------------------------------------------------------------
// Process standard arguments
int ProcessStandardArguments(
	ImportData& fill, 
	const char* const * params,
	unsigned int num)
{
	// -ptv    --pretransform-vertices
	// -gsn    --gen-smooth-normals
	// -gn     --gen-normals
	// -cts    --calc-tangent-space
	// -jiv    --join-identical-vertices
	// -rrm    --remove-redundant-materials
	// -fd     --find-degenerates
	// -slm    --split-large-meshes
	// -lbw    --limit-bone-weights
	// -vds    --validate-data-structure
	// -icl    --improve-cache-locality
	// -sbpt   --sort-by-ptype
	// -lh     --convert-to-lh
	// -fuv    --flip-uv
	// -fwo    --flip-winding-order
	// -tuv    --transform-uv-coords
	// -guv    --gen-uvcoords
	// -fid    --find-invalid-data
	// -fixn   --fix normals
	// -tri    --triangulate
	// -fi     --find-instances
	// -og     --optimize-graph
	// -om     --optimize-meshes
	// -db     --debone
	// -sbc    --split-by-bone-count
	// -gs	   --global-scale
	//
	// -c<file> --config-file=<file>

	for (unsigned int i = 0; i < num;++i) 
	{
        const char *param = params[ i ];
        printf( "param = %s\n", param );
		if (! strcmp( param, "-ptv") || ! strcmp( param, "--pretransform-vertices")) {
			fill.ppFlags |= aiProcess_PreTransformVertices;
		}
		else if (! strcmp( param, "-gsn") || ! strcmp( param, "--gen-smooth-normals")) {
			fill.ppFlags |= aiProcess_GenSmoothNormals;
		}
    else if (! strcmp( param, "-dn") || ! strcmp( param, "--drop-normals")) {
			fill.ppFlags |= aiProcess_DropNormals;
		}
		else if (! strcmp( param, "-gn") || ! strcmp( param, "--gen-normals")) {
			fill.ppFlags |= aiProcess_GenNormals;
		}
		else if (! strcmp( param, "-jiv") || ! strcmp( param, "--join-identical-vertices")) {
			fill.ppFlags |= aiProcess_JoinIdenticalVertices;
		}
		else if (! strcmp( param, "-rrm") || ! strcmp( param, "--remove-redundant-materials")) {
			fill.ppFlags |= aiProcess_RemoveRedundantMaterials;
		}
		else if (! strcmp( param, "-fd") || ! strcmp( param, "--find-degenerates")) {
			fill.ppFlags |= aiProcess_FindDegenerates;
		}
		else if (! strcmp( param, "-slm") || ! strcmp( param, "--split-large-meshes")) {
			fill.ppFlags |= aiProcess_SplitLargeMeshes;
		}
		else if (! strcmp( param, "-lbw") || ! strcmp( param, "--limit-bone-weights")) {
			fill.ppFlags |= aiProcess_LimitBoneWeights;
		}
		else if (! strcmp( param, "-vds") || ! strcmp( param, "--validate-data-structure")) {
			fill.ppFlags |= aiProcess_ValidateDataStructure;
		}
		else if (! strcmp( param, "-icl") || ! strcmp( param, "--improve-cache-locality")) {
			fill.ppFlags |= aiProcess_ImproveCacheLocality;
		}
		else if (! strcmp( param, "-sbpt") || ! strcmp( param, "--sort-by-ptype")) {
			fill.ppFlags |= aiProcess_SortByPType;
		}
		else if (! strcmp( param, "-lh") || ! strcmp( param, "--left-handed")) {
			fill.ppFlags |= aiProcess_ConvertToLeftHanded;
		}
		else if (! strcmp( param, "-fuv") || ! strcmp( param, "--flip-uv")) {
			fill.ppFlags |= aiProcess_FlipUVs;
		}
		else if (! strcmp( param, "-fwo") || ! strcmp( param, "--flip-winding-order")) {
			fill.ppFlags |= aiProcess_FlipWindingOrder;
		}
		else if (! strcmp( param, "-tuv") || ! strcmp( param, "--transform-uv-coords")) {
			fill.ppFlags |= aiProcess_TransformUVCoords;
		}
		else if (! strcmp( param, "-guv") || ! strcmp( param, "--gen-uvcoords")) {
			fill.ppFlags |= aiProcess_GenUVCoords;
		}
		else if (! strcmp( param, "-fid") || ! strcmp( param, "--find-invalid-data")) {
			fill.ppFlags |= aiProcess_FindInvalidData;
		}
		else if (! strcmp( param, "-fixn") || ! strcmp( param, "--fix-normals")) {
			fill.ppFlags |= aiProcess_FixInfacingNormals;
		}
		else if (! strcmp( param, "-tri") || ! strcmp( param, "--triangulate")) {
			fill.ppFlags |= aiProcess_Triangulate;
		}
		else if (! strcmp( param, "-cts") || ! strcmp( param, "--calc-tangent-space")) {
			fill.ppFlags |= aiProcess_CalcTangentSpace;
		}
		else if (! strcmp( param, "-fi") || ! strcmp( param, "--find-instances")) {
			fill.ppFlags |= aiProcess_FindInstances;
		}
		else if (! strcmp( param, "-og") || ! strcmp( param, "--optimize-graph")) {
			fill.ppFlags |= aiProcess_OptimizeGraph;
		}
		else if (! strcmp( param, "-om") || ! strcmp( param, "--optimize-meshes")) {
			fill.ppFlags |= aiProcess_OptimizeMeshes;
		}
		else if (! strcmp( param, "-db") || ! strcmp( param, "--debone")) {
			fill.ppFlags |= aiProcess_Debone;
		}
		else if (! strcmp( param, "-sbc") || ! strcmp( param, "--split-by-bone-count")) {
			fill.ppFlags |= aiProcess_SplitByBoneCount;
		}
		else if (!strcmp(param, "-embtex") || ! strcmp(param, "--embed-textures")) {
			fill.ppFlags |= aiProcess_EmbedTextures;
		}
		else if (!strcmp(param, "-gs") || ! strcmp(param, "--global-scale")) {
			fill.ppFlags |= aiProcess_GlobalScale;
		}
		else if (! strncmp( param, "-c",2) || ! strncmp( param, "--config=",9)) {
			const unsigned int ofs = (params[i][1] == '-' ? 9 : 2);

			// use default configurations
            if (!strncmp( param + ofs, "full", 4 )) {
                fill.ppFlags |= aiProcessPreset_TargetRealtime_MaxQuality;
            } else if (!strncmp( param + ofs, "default", 7 )) {
				fill.ppFlags |= aiProcessPreset_TargetRealtime_Quality;
			} else if (! strncmp( param +ofs,"fast",4)) {
				fill.ppFlags |= aiProcessPreset_TargetRealtime_Fast;
			}
		} else if (! strcmp( param, "-l") || ! strcmp( param, "--show-log")) {
			fill.showLog = true;
		}
		else if (! strcmp( param, "-v") || ! strcmp( param, "--verbose")) {
			fill.verbose = true;
		}
		else if (! strncmp( param, "--log-out=",10) || ! strncmp( param, "-lo",3)) {
			fill.logFile = std::string(params[i]+(params[i][1] == '-' ? 10 : 3));
			if (!fill.logFile.length()) {
				fill.logFile = "assimp-log.txt";
			}
		}
	}

	if (fill.logFile.length() || fill.showLog || fill.verbose) {
		fill.log = true;
	}

	return AssimpCmdError::Success;
}

// ------------------------------------------------------------------------------
int Assimp_TestBatchLoad (
	const char* const* params, 
	unsigned int num)
{
	for(unsigned int i = 0; i < num; ++i) {
		globalImporter->ReadFile(params[i],aiProcessPreset_TargetRealtime_MaxQuality);
		// we're totally silent. scene destructs automatically.
	}
	return AssimpCmdError::Success;
}
