
///////////////////////////////////////////////////////////
//                                                       //
//                         SAGA                          //
//                                                       //
//      System for Automated Geoscientific Analyses      //
//                                                       //
//                     Tool Library                      //
//                   Projection_Proj4                    //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//                  crs_definition.cpp                   //
//                                                       //
//                 Copyright (C) 2024 by                 //
//                      Olaf Conrad                      //
//                                                       //
//-------------------------------------------------------//
//                                                       //
// This file is part of 'SAGA - System for Automated     //
// Geoscientific Analyses'. SAGA is free software; you   //
// can redistribute it and/or modify it under the terms  //
// of the GNU General Public License as published by the //
// Free Software Foundation, either version 2 of the     //
// License, or (at your option) any later version.       //
//                                                       //
// SAGA is distributed in the hope that it will be       //
// useful, but WITHOUT ANY WARRANTY; without even the    //
// implied warranty of MERCHANTABILITY or FITNESS FOR A  //
// PARTICULAR PURPOSE. See the GNU General Public        //
// License for more details.                             //
//                                                       //
// You should have received a copy of the GNU General    //
// Public License along with this program; if not, see   //
// <http://www.gnu.org/licenses/>.                       //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//    e-mail:     oconrad@saga-gis.org                   //
//                                                       //
//    contact:    Olaf Conrad                            //
//                Institute of Geography                 //
//                University of Hamburg                  //
//                Germany                                //
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#if PROJ_VERSION_MAJOR >= 6

//---------------------------------------------------------
#include "crs_definition.h"
#include "crs_transform.h"


///////////////////////////////////////////////////////////
//														 //
//														 //
//														 //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
CCRS_Definition::CCRS_Definition(void)
{
	Set_Name		(_TL("Coordinate Reference System Format Conversion"));

	Set_Author		("O.Conrad (c) 2024");

	Set_Description	(_TW(
		"Type in a Coordinate Reference System (CRS) definition and "
		"find its representation in various formats. Supported input formats are:<ul>"
		"<li>proj strings</li>"
		"<li>WKT strings</li>"
		"<li>object codes (e.g. \"EPSG:4326\", \"ESRI:31493\", \"urn:ogc:def:crs:EPSG::4326\", \"urn:ogc:def:coordinateOperation:EPSG::1671\")</li>"
		"<li>object names (e.g. \"WGS 84\", \"WGS 84 / UTM zone 31N\", \"Germany_Zone_3\". In this case as uniqueness is not guaranteed, heuristics are applied to determine the appropriate best match.</li>"
		"<li>OGC URN combining references for compound CRS (e.g \"urn:ogc:def:crs,crs:EPSG::2393,crs:EPSG::5717\" or custom abbreviated syntax \"EPSG:2393+5717\")</li>"
		"<li>OGC URN combining references for concatenated operations (e.g. \"urn:ogc:def:coordinateOperation,coordinateOperation:EPSG::3895,coordinateOperation:EPSG::1618\")</li>"
		"<li>PROJJSON strings (find the jsonschema at <a href=\"https://proj.org/schemas/v0.4/projjson.schema.json\">proj.org</a>)</li>"
		"<li>compound CRS made from two object names separated with \" + \" (e.g. \"WGS 84 + EGM96 height\")</li>"
		"</ul>"
	));

	Add_Reference("https://proj.org", SG_T("PROJ Homepage"));

	//-----------------------------------------------------
	Parameters.Add_String("",
		"DEFINITION", _TL("Definition"),
		_TL(""),
		"epsg:4326"
	);

	Parameters.Add_Choice("",
		"FORMAT"    , _TL("Format"),
		_TL(""),
		CSG_String::Format("PROJ|WKT-1|WKT-2|JSON|ESRI|%s", _TL("all")
		), has_GUI() ? 5 : 2
	);

	Parameters.Add_Info_String("", "PROJ", _TL("PROJ" ), _TL(""), "", false);
	Parameters.Add_Info_String("", "WKT1", _TL("WKT-1"), _TL(""), "",  true);
	Parameters.Add_Info_String("", "WKT2", _TL("WKT-2"), _TL(""), "",  true);
	Parameters.Add_Info_String("", "JSON", _TL("JSON" ), _TL(""), "",  true);
	Parameters.Add_Info_String("", "ESRI", _TL("ESRI" ), _TL(""), "", false);
	#ifdef _DEBUG
	Parameters.Add_Info_String("", "XML" , _TL("XML"  ), _TL(""), "",  true);
	#endif

	Parameters.Add_Bool(""    , "MULTILINE" , _TL("Multiline" ), _TL("applies to JSON and WKT"), true);
	Parameters.Add_Bool("WKT2", "SIMPLIFIED", _TL("Simplified"), _TL("applies to WKT-2"       ), true);

	Parameters.Add_Table("", "FORMATS", _TL("Formats"), _TL(""), PARAMETER_OUTPUT_OPTIONAL)->Set_UseInGUI(false);

	if( has_GUI() )
	{
		On_Parameter_Changed(&Parameters, Parameters("DEFINITION"));
	}
}


///////////////////////////////////////////////////////////
//														 //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
int CCRS_Definition::On_Parameter_Changed(CSG_Parameters *pParameters, CSG_Parameter *pParameter)
{
	if( pParameter->Cmp_Identifier("DEFINITION") || pParameter->Cmp_Identifier("FORMAT") || pParameter->Cmp_Identifier("MULTILINE") || pParameter->Cmp_Identifier("SIMPLIFIED") )
	{
		CSG_String Definition((*pParameters)["DEFINITION"].asString());
		
		if( Definition.Replace("\\n", "\n") > 0 )
		{
			Definition.Trim(); pParameter->Set_Value(Definition);
		}

		int       Format = (*pParameters)["FORMAT"    ].asInt ();
		bool  bMultiLine = (*pParameters)["MULTILINE" ].asBool();
		bool bSimplified = (*pParameters)["SIMPLIFIED"].asBool();

		if( Format >= 5 || Format == 0 ) { pParameters->Set_Parameter("PROJ", CSG_CRSProjector::Convert_CRS_To_PROJ(Definition                         )); }
		if( Format >= 5 || Format == 1 ) { pParameters->Set_Parameter("WKT1", CSG_CRSProjector::Convert_CRS_To_WKT1(Definition, bMultiLine             )); }
		if( Format >= 5 || Format == 2 ) { pParameters->Set_Parameter("WKT2", CSG_CRSProjector::Convert_CRS_To_WKT2(Definition, bMultiLine, bSimplified)); }
		if( Format >= 5 || Format == 3 ) { pParameters->Set_Parameter("JSON", CSG_CRSProjector::Convert_CRS_To_JSON(Definition, bMultiLine             )); }
		if( Format >= 5 || Format == 4 ) { pParameters->Set_Parameter("ESRI", CSG_CRSProjector::Convert_CRS_To_ESRI(Definition                         )); }
		#ifdef _DEBUG
		if( Format >= 5 || Format == 2 ) { pParameters->Set_Parameter("XML" , CSG_Projections::Convert_WKT2_to_XML((*pParameters)("WKT2")->asString()  )); }
		#endif
	}

	return( CSG_Tool::On_Parameter_Changed(pParameters, pParameter) );
}

//---------------------------------------------------------
int CCRS_Definition::On_Parameters_Enable(CSG_Parameters *pParameters, CSG_Parameter *pParameter)
{
	if( pParameter->Cmp_Identifier("FORMAT") )
	{
		int Format = pParameter->asInt();

		pParameters->Set_Enabled("PROJ", Format >= 5 || Format == 0);
		pParameters->Set_Enabled("WKT1", Format >= 5 || Format == 1);
		pParameters->Set_Enabled("WKT2", Format >= 5 || Format == 2);
		pParameters->Set_Enabled("JSON", Format >= 5 || Format == 3);
		pParameters->Set_Enabled("ESRI", Format >= 5 || Format == 4);
		#ifdef _DEBUG
		pParameters->Set_Enabled("XML" , Format >= 5 || Format == 2);
		#endif
	}

	return( CSG_Tool::On_Parameters_Enable(pParameters, pParameter) );
}


///////////////////////////////////////////////////////////
//														 //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
bool CCRS_Definition::On_Execute(void)
{
	CSG_String Definition(Parameters["DEFINITION"].asString());

	if( Definition.is_Empty() )
	{
		return( false );
	}

	int       Format = Parameters["FORMAT"    ].asInt ();
	bool  bMultiLine = Parameters["MULTILINE" ].asBool();
	bool bSimplified = Parameters["SIMPLIFIED"].asBool();

	Set_Parameter("PROJ", Format < 5 && Format != 0 ? CSG_String("") : CSG_CRSProjector::Convert_CRS_To_PROJ(Definition                         ));
	Set_Parameter("WKT1", Format < 5 && Format != 1 ? CSG_String("") : CSG_CRSProjector::Convert_CRS_To_WKT1(Definition, bMultiLine             ));
	Set_Parameter("WKT2", Format < 5 && Format != 2 ? CSG_String("") : CSG_CRSProjector::Convert_CRS_To_WKT2(Definition, bMultiLine, bSimplified));
	Set_Parameter("JSON", Format < 5 && Format != 3 ? CSG_String("") : CSG_CRSProjector::Convert_CRS_To_JSON(Definition, bMultiLine             ));
	Set_Parameter("ESRI", Format < 5 && Format != 4 ? CSG_String("") : CSG_CRSProjector::Convert_CRS_To_ESRI(Definition                         ));
	#ifdef _DEBUG
	Set_Parameter("XML" , Format < 5 && Format != 2 ? CSG_String("") : CSG_Projections::Convert_WKT2_to_XML(Parameters("WKT2")->asString()      ));
	#endif

	if( Parameters["FORMATS"].asTable() )
	{
		CSG_Table &Formats = *Parameters["FORMATS"].asTable(); Formats.Destroy(); Formats.Set_Name(_TL("CRS Definition"));

		Formats.Add_Field("Format"    , SG_DATATYPE_String);
		Formats.Add_Field("Definition", SG_DATATYPE_String);

		#define Add_Format(id) { CSG_Table_Record &r = *Formats.Add_Record(); r.Set_Value(0, Parameters[id].Get_Name()); r.Set_Value(1, Parameters[id].asString()); }

		if( Format >= 5 || Format == 0 ) { Add_Format("PROJ"); }
		if( Format >= 5 || Format == 1 ) { Add_Format("WKT1"); }
		if( Format >= 5 || Format == 2 ) { Add_Format("WKT2"); }
		if( Format >= 5 || Format == 3 ) { Add_Format("JSON"); }
		if( Format >= 5 || Format == 4 ) { Add_Format("ESRI"); }
	}

	switch( Format )
	{
	case  0: Definition = Parameters["PROJ"].asString(); break;
	case  1: Definition = Parameters["WKT1"].asString(); break;
	default: Definition = Parameters["WKT2"].asString(); break;
	case  3: Definition = Parameters["JSON"].asString(); break;
	case  4: Definition = Parameters["ESRI"].asString(); break;
	}

	return( Definition.is_Empty() == false );
}


///////////////////////////////////////////////////////////
//														 //
//														 //
//														 //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#endif // #if PROJ_VERSION_MAJOR >= 6
