%'merge_proj': concatene several images from series, adjust their luminosity, can project them on a regular grid in phys coordinates
%------------------------------------------------------------------------
% function ParamOut=merge_proj(Param)
%------------------------------------------------------------------------
%%%%%%%%%%% GENERAL TO ALL SERIES ACTION FCTS %%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%OUTPUT
% ParamOut: sets options in the GUI series.fig needed for the function
%
%INPUT:
% In run mode, the input parameters are given as a Matlab structure Param copied from the GUI series.
% In batch mode, Param is the name of the corresponding xml file containing the same information
% when Param.Action.RUN=0 (as activated when the current Action is selected
% in series), the function ouput paramOut set the activation of the needed GUI elements
%
% Param contains the elements:(use the menu bar command 'export/GUI config' in series to 
% see the current structure Param)
%    .InputTable: cell of input file names, (several lines for multiple input)
%                      each line decomposed as {RootPath,SubDir,Rootfile,NomType,Extension}
%    .OutputSubDir: name of the subdirectory for data outputs
%    .OutputDirExt: directory extension for data outputs
%    .Action: .ActionName: name of the current activated function
%             .ActionPath:   path of the current activated function
%             .ActionExt: fct extension ('.m', Matlab fct, '.sh', compiled   Matlab fct
%             .RUN =0 for GUI input, =1 for function activation
%             .RunMode='local','background', 'cluster': type of function  use
%             
%    .IndexRange: set the file or frame indices on which the action must be performed
%    .FieldTransform: .TransformName: name of the selected transform function
%                     .TransformPath:   path  of the selected transform function
%    .InputFields: sub structure describing the input fields withfields
%              .FieldName: name(s) of the field
%              .VelType: velocity type
%              .FieldName_1: name of the second field in case of two input series
%              .VelType_1: velocity type of the second field in case of two input series
%              .Coord_y: name of y coordinate variable
%              .Coord_x: name of x coordinate variable
%    .ProjObject: %sub structure describing a projection object (read from ancillary GUI set_object)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%=======================================================================
% Copyright 2008-2021, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France
%   http://www.legi.grenoble-inp.fr
%   Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
%
%     This file is part of the toolbox UVMAT.
%
%     UVMAT 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.
%
%     UVMAT 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 (see LICENSE.txt) for more details.
%=======================================================================

function ParamOut=merge_proj(Param)

%% set the input elements needed on the GUI series when the function is selected in the menu ActionName or InputTable refreshed
ImageTypeOptions={'image','multimage','mmreader','video','cine_phantom'};
if isstruct(Param) && isequal(Param.Action.RUN,0)
    ParamOut.AllowInputSort='off';% allow alphabetic sorting of the list of input file SubDir (options 'off'/'on', 'off' by default)
    ParamOut.WholeIndexRange='off';% prescribes the file index ranges from min to max (options 'off'/'on', 'off' by default)
    ParamOut.NbSlice='off'; %nbre of slices ('off' by default)
    ParamOut.VelType='one';% menu for selecting the velocity type (options 'off'/'one'/'two',  'off' by default)
    ParamOut.FieldName='one';% menu for selecting the field (s) in the input file(options 'off'/'one'/'two', 'off' by default)
    ParamOut.FieldTransform = 'on';%can use a transform function
    ParamOut.TransformPath=fullfile(fileparts(which('uvmat')),'transform_field');% path to transform functions (needed for compilation only)
    ParamOut.ProjObject='on';%can use projection object(option 'off'/'on',
    ParamOut.Mask='on';%can use mask option   (option 'off'/'on', 'off' by default)
    ParamOut.OutputDirExt='.mproj';%set the output dir extension
    ParamOut.OutputFileMode='NbInput';% '=NbInput': 1 output file per input file index, '=NbInput_i': 1 file per input file index i, '=NbSlice': 1 file per slice
    first_j=[];
    if isequal(size(Param.InputTable,1),1) && ~isfield(Param,'ProjObject')
        msgbox_uvmat('WARNING','You need a projection object of type plane for merge_proj')
    end
    if isfield(Param.IndexRange,'first_j'); first_j=Param.IndexRange.first_j; end
    PairString='';
    if isfield(Param.IndexRange,'PairString'); PairString=Param.IndexRange.PairString; end
    [i1,i2,j1,j2] = get_file_index(Param.IndexRange.first_i,first_j,PairString);
    
    for iview=1:size(Param.InputTable,1)
        FirstFileName=fullfile_uvmat(Param.InputTable{iview,1},Param.InputTable{iview,2},Param.InputTable{iview,3},...
            Param.InputTable{iview,5},Param.InputTable{iview,4},i1,i2,j1,j2);
        if ~exist(FirstFileName,'file')
            msgbox_uvmat('WARNING',['the first input file ' FirstFileName ' does not exist'])
        end
        FileInfo=get_file_info(FirstFileName);
        CheckImage=~isempty(find(strcmp(FileInfo.FileType,ImageTypeOptions)));% =1 for images
        if ~CheckImage
            msgbox_uvmat('WARNING',['the input file ' FirstFileName ' is not an image'])
        end
    end
    return
end

%%%%%%%%%%%% STANDARD PART (DO NOT EDIT) %%%%%%%%%%%%
ParamOut=[]; %default output
%% read input parameters from an xml file if input is a file name (batch mode)
checkrun=1;
if ischar(Param)
    Param=xml2struct(Param);% read Param as input file (batch case)
    checkrun=0;
end
hseries=findobj(allchild(0),'Tag','series');
RUNHandle=findobj(hseries,'Tag','RUN');%handle of RUN button in GUI series
WaitbarHandle=findobj(hseries,'Tag','Waitbar');%handle of waitbar in GUI series

%% define the directory for result file (with path=RootPath{1})
OutputDir=[Param.OutputSubDir Param.OutputDirExt];% subdirectory for output files

if ~isfield(Param,'InputFields')
    Param.InputFields.FieldName='';
end

%% root input file type
RootPath=Param.InputTable(:,1);
RootFile=Param.InputTable(:,3);
SubDir=Param.InputTable(:,2);
NomType=Param.InputTable(:,4);
FileExt=Param.InputTable(:,5);
[filecell,i1_series,i2_series,j1_series,j2_series]=get_file_series(Param);
%%%%%%%%%%%%
% The cell array filecell is the list of input file names, while
% filecell{iview,fileindex}:
%        iview: line in the table corresponding to a given file series
%        fileindex: file index within  the file series, 
% i1_series(iview,ref_j,ref_i)... are the corresponding arrays of indices i1,i2,j1,j2, depending on the input line iview and the two reference indices ref_i,ref_j 
% i1_series(iview,fileindex) expresses the same indices as a 1D array in file indices
%%%%%%%%%%%%
% NbSlice=1;%default
% if isfield(Param.IndexRange,'NbSlice')&&~isempty(Param.IndexRange.NbSlice)
%     NbSlice=Param.IndexRange.NbSlice;
% end
NbView=numel(i1_series);%number of input file series (lines in InputTable)
NbField_j=size(i1_series{1},1); %nb of fields for the j index (bursts or volume slices)
NbField_i=size(i1_series{1},2); %nb of fields for the i index
NbField=NbField_j*NbField_i; %total number of fields

%% determine the file type on each line from the first input file 
ImageTypeOptions={'image','multimage','mmreader','video','cine_phantom'};
NcTypeOptions={'netcdf','civx','civdata'};
for iview=1:NbView
    if ~exist(filecell{iview,1}','file')
        disp_uvmat('ERROR',['the first input file ' filecell{iview,1} ' does not exist'],checkrun)
        return
    end
    [FileInfo{iview},MovieObject{iview}]=get_file_info(filecell{iview,1});
    FileType{iview}=FileInfo{iview}.FileType;
    CheckImage{iview}=~isempty(find(strcmp(FileType{iview},ImageTypeOptions)));% =1 for images
    
    if ~isempty(j1_series{iview})
        frame_index{iview}=j1_series{iview};
    else
        frame_index{iview}=i1_series{iview};
    end
end

%% calibration data and timing: read the ImaDoc files
[XmlData,NbSlice_calib,time,errormsg]=read_multimadoc(RootPath,SubDir,RootFile,FileExt,i1_series,i2_series,j1_series,j2_series);
if size(time,1)>1
    diff_time=max(max(diff(time)));
    if diff_time>0
        disp_uvmat('WARNING',['times of series differ by (max) ' num2str(diff_time) ': the mean time is chosen in result'],checkrun)
    end
end
if ~isempty(errormsg)
    disp_uvmat('WARNING',errormsg,checkrun)
end
time=mean(time,1); %averaged time taken for the merged field

%% coordinate transform or other user defined transform
transform_fct='';%default fct handle
if isfield(Param,'FieldTransform')&&~isempty(Param.FieldTransform.TransformName)
    currentdir=pwd;
    cd(Param.FieldTransform.TransformPath)
    transform_fct=str2func(Param.FieldTransform.TransformName);
    cd (currentdir)
end

%% output file type (8 bits)

FileExtOut='.png'; %image output (input and proj result = image)
% for iview=1:NbView
%     BitDepth(iview)=FileInfo{iview}.BitDepth;
% end
% BitDepth=max(BitDepth);
BitDepth=8;

NomTypeOut=NomType;% output file index will indicate the first and last ref index in the series
RootFileOut=RootFile{1};
for iview=2:NbView
    if ~strcmp(RootFile{iview},RootFile{1})
        RootFileOut='mproj';
        break
    end
end

%% mask 
MaskData=cell(NbView,1);
if Param.CheckMask
    if ischar(Param.MaskTable)% case of a single mask (char chain)
        Param.MaskTable={Param.MaskTable};
    end
    for iview=1:numel(Param.MaskTable)
        if exist(Param.MaskTable{iview},'file')
            [MaskData{iview},tild,errormsg] = read_field(Param.MaskTable{iview},'image');
            if ~isempty(transform_fct) && nargin(transform_fct)>=2
                MaskData{iview}=transform_fct(MaskData{iview},XmlData{iview});
            end
        end
    end
end

%% Set field names and velocity types
%use Param.InputFields for all views

%% MAIN LOOP ON FIELDS
%%%%%%%%%%%%% STANDARD PART (DO NOT EDIT) %%%%%%%%%%%%
% for i_slice=1:NbSlice
%     index_slice=i_slice:NbSlice:NbField;% select file indices of the slice
%     NbFiles=0;
%     nbmissing=0;

%%%%%%%%%%%%%%%% loop on field indices %%%%%%%%%%%%%%%%
for index=1:NbField
    update_waitbar(WaitbarHandle,index/NbField)
    if ~isempty(RUNHandle) && ~strcmp(get(RUNHandle,'BusyAction'),'queue')
        disp('program stopped by user')
        return
    end
    
    %%%%%%%%%%%%%%%% loop on views (input lines) %%%%%%%%%%%%%%%%
    Data=cell(1,NbView);%initiate the set Data
    timeread=zeros(1,NbView);
    for iview=1:NbView
        %% reading input file(s)
        [Data{iview},tild,errormsg] = read_field(filecell{iview,index},FileType{iview},Param.InputFields,frame_index{iview}(index));
        if ~isempty(errormsg)
            disp(['ERROR in merge_proj/read_field/' errormsg])
            return
        end
        % get the time defined in the current file if not already defined from the xml file
        if ~isempty(time) && isfield(Data{iview},'Time')
            timeread(iview)=Data{iview}.Time;
        end
        if ~isempty(NbSlice_calib)
            Data{iview}.ZIndex=mod(i1_series{iview}(index)-1,NbSlice_calib{iview})+1;%Zindex for phys transform
        end
        
        %% transform the input field (e.g; phys) if requested (no transform involving two input fields)
        if ~isempty(transform_fct)
            if nargin(transform_fct)>=2
                Data{iview}=transform_fct(Data{iview},XmlData{iview});
            else
                Data{iview}=transform_fct(Data{iview});
            end
        end
        
        %% CUSTOM ADJUSTMENT OF LUMINOSITY ANDCONTRAST%%%%%%%%%%%
        if iview==1
        Data{iview}.A=Data{iview}.A-100; %remove offset on Dalsa1
        else
        Data{iview}.A=Data{iview}.A-60; %remove offset on Dalsa2
        Data{iview}.A=Data{iview}.A*3;%adjust luminosity of Dalsa2
        Data{iview}.A=filter2(ones(2,2)/4,Data{iview}.A); %filter image Dalsa2 to fit with the projection grid resolution
        end
        
        %% projection on object (gridded plane)
        if Param.CheckObject
            [Data{iview},errormsg]=proj_field(Data{iview},Param.ProjObject);
            if ~isempty(errormsg)
                disp(['ERROR in merge_proge/proj_field: ' errormsg])
                return
            end
        end
        
        %% mask
        if Param.CheckMask && ~isempty(MaskData{iview})
            [Data{iview},errormsg]=mask_proj(Data{iview},MaskData{iview});
        end
    end
    %%%%%%%%%%%%%%%% END LOOP ON VIEWS %%%%%%%%%%%%%%%%
    
    %% merge the NbView fields
    MergeData=merge_field(Data);
    if isfield(MergeData,'Txt')
        disp(MergeData.Txt);
        return
    end
    
    %% time of the merged field: take the average of the different views
    if ~isempty(time)
        timeread=time(index);
    elseif ~isempty(find(timeread))% time defined from ImaDoc
        timeread=mean(timeread(timeread~=0));% take average over times form the files (when defined)
    else
        timeread=index;% take time=file index
    end
    
    %% generating the name of the merged field
    i1=i1_series{1}(index);
    if ~isempty(i2_series{end})
        i2=i2_series{end}(index);
    else
        i2=i1;
    end
    j1=1;
    j2=1;
    if ~isempty(j1_series{1})
        j1=j1_series{1}(index);
        if ~isempty(j2_series{end})
            j2=j2_series{end}(index);
        else
            j2=j1;
        end
    end
    OutputFile=fullfile_uvmat(RootPath{1},OutputDir,RootFileOut,FileExtOut,NomType{1},i1,i2,j1,j2);
    
    %% recording the merged field
    
    if BitDepth==8
        imwrite(uint8(MergeData.A),OutputFile,'BitDepth',8)
    else
        imwrite(uint16(MergeData.A),OutputFile,'BitDepth',16)
    end
    if index==1
        %write xml calibration file, using the first file
        siz=size(MergeData.A);
        npy=siz(1);
        npx=siz(2);
        if isfield(MergeData,'coord_x') && isfield(MergeData,'coord_y')
            Rangx=MergeData.coord_x;
            Rangy=MergeData.coord_y;
        elseif isfield(MergeData,'AX')&& isfield(MergeData,'AY')
            Rangx=[MergeData.AX(1) MergeData.AX(end)];
            Rangy=[MergeData.AY(1) MergeData.AY(end)];
        else
            Rangx=[0.5 npx-0.5];
            Rangy=[npy-0.5 0.5];%default
        end
        pxcmx=(npx-1)/(Rangx(2)-Rangx(1));
        pxcmy=(npy-1)/(Rangy(1)-Rangy(2));
        T_x=-pxcmx*Rangx(1)+0.5;
        T_y=-pxcmy*Rangy(2)+0.5;
        GeometryCal.CalibrationType='rescale';
        GeometryCal.CoordUnit=MergeData.CoordUnit;
        GeometryCal.focal=1;
        GeometryCal.R=[pxcmx,0,0;0,pxcmy,0;0,0,1];
        GeometryCal.Tx_Ty_Tz=[T_x T_y 1];
        ImaDoc.GeometryCalib=GeometryCal;
        t=struct2xml(ImaDoc);
        t=set(t,1,'name','ImaDoc');
        save(t,[fileparts(OutputFile) '.xml'])
    end
end   



%'merge_field': concatene fields
%------------------------------------------------------------------------
function [MergeData,errormsg]=merge_field(Data)
%% default output
if isempty(Data)||~iscell(Data)
    MergeData=[];
    return
end
errormsg='';
MergeData=Data{1};% merged field= first field by default, reproduces the glabal attributes of the first field
NbView=length(Data);
if NbView==1
    return
end

%% group the variables (fields of 'Data') in cells of variables with the same dimensions
[CellInfo,NbDim,errormsg]=find_field_cells(Data{1});
if ~isempty(errormsg)
    return
end

%LOOP ON GROUPS OF VARIABLES SHARING THE SAME DIMENSIONS
for icell=1:length(CellInfo)
    if NbDim(icell)~=1 % skip field cells which are of dim 1
        switch CellInfo{icell}.CoordType
            case 'scattered'  %case of input fields with unstructured coordinates: just concacene data
                for ivar=CellInfo{icell}.VarIndex %  indices of the selected variables in the list FieldData.ListVarName
                    VarName=Data{1}.ListVarName{ivar};
                    %MergeData=Data{1};% merged field= first field by default, reproduces the glabal attributes of the first field
                    for iview=2:NbView
                        MergeData.(VarName)=[MergeData.(VarName); Data{iview}.(VarName)];
                    end
                end
            case 'grid'        %case of fields defined on a structured  grid
                FFName='';
                if isfield(CellInfo{icell},'VarIndex_errorflag') && ~isempty(CellInfo{icell}.VarIndex_errorflag)
                    FFName=Data{1}.ListVarName{CellInfo{icell}.VarIndex_errorflag};% name of errorflag variable
                end
                % select good data on each view
                for ivar=CellInfo{icell}.VarIndex  %  indices of the selected variables in the list FieldData.ListVarName
                    VarName=Data{1}.ListVarName{ivar};
                    for iview=1:NbView
                        if isempty(FFName)
                            check_bad=isnan(Data{iview}.(VarName));%=0 for NaN data values, 1 else
                        else
                            check_bad=isnan(Data{iview}.(VarName)) | Data{iview}.(FFName)~=0;%=0 for NaN or error flagged data values, 1 else
                        end
                        Data{iview}.(VarName)(check_bad)=0; %set to zero NaN or masked data
                        if iview==1
                            MergeData.(VarName)=Data{1}.(VarName);% correct the field of MergeData
                            NbAver=~check_bad;% initiate NbAver: the nbre of good data for each point
                        elseif size(Data{iview}.(VarName))~=size(MergeData.(VarName))
                            errormsg='sizes of the input matrices do not agree, need to interpolate on a common grid using a projection object';
                            return
                        else                     
                            MergeData.(VarName)=MergeData.(VarName) + Data{iview}.(VarName);%add data
                            NbAver=NbAver + ~check_bad;% add 1 for good data, 0 else
                        end
                    end
                    MergeData.(VarName)(NbAver~=0)=MergeData.(VarName)(NbAver~=0)./NbAver(NbAver~=0);% take average of defined data at each point
                end
        end
        if isempty(FFName)
            FFName='FF';
        end
        MergeData.(FFName)(NbAver~=0)=0;% flag to 1 undefined summed data
        MergeData.(FFName)(NbAver==0)=1;% flag to 1 undefined summed data
    end
end



    
