function varargout=jspostfil(FI,domain,field,cmd,varargin)
%JSPOSTFIL QP support for JSPost files.
%   Domains                 = XXXFIL(FI,[],'domains')
%   DataProps               = XXXFIL(FI,Domain)
%   Size                    = XXXFIL(FI,Domain,DataFld,'size')
%   Times                   = XXXFIL(FI,Domain,DataFld,'times',T)
%   StNames                 = XXXFIL(FI,Domain,DataFld,'stations')
%   SubFields               = XXXFIL(FI,Domain,DataFld,'subfields')
%   [TZshift   ,TZstr  ]    = XXXFIL(FI,Domain,DataFld,'timezone')
%   [Data      ,NewFI]      = XXXFIL(FI,Domain,DataFld,'data',subf,t,station,m,n,k)
%   [Data      ,NewFI]      = XXXFIL(FI,Domain,DataFld,'celldata',subf,t,station,m,n,k)
%   [Data      ,NewFI]      = XXXFIL(FI,Domain,DataFld,'griddata',subf,t,station,m,n,k)
%   [Data      ,NewFI]      = XXXFIL(FI,Domain,DataFld,'gridcelldata',subf,t,station,m,n,k)
%                             XXXFIL(FI,[],'options',OptionsFigure,'initialize')
%   [NewFI     ,cmdargs]    = XXXFIL(FI,[],'options',OptionsFigure,OptionsCommand, ...)
%
%   The DataFld can only be either an element of the DataProps structure.

%----- LGPL --------------------------------------------------------------------
%                                                                               
%   Copyright (C) 2011-2021 Stichting Deltares.                                     
%                                                                               
%   This library is free software; you can redistribute it and/or                
%   modify it under the terms of the GNU Lesser General Public                   
%   License as published by the Free Software Foundation version 2.1.                         
%                                                                               
%   This library 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            
%   Lesser General Public License for more details.                              
%                                                                               
%   You should have received a copy of the GNU Lesser General Public             
%   License along with this library; if not, see <http://www.gnu.org/licenses/>. 
%                                                                               
%   contact: delft3d.support@deltares.nl                                         
%   Stichting Deltares                                                           
%   P.O. Box 177                                                                 
%   2600 MH Delft, The Netherlands                                               
%                                                                               
%   All indications and logos of, and references to, "Delft3D" and "Deltares"    
%   are registered trademarks of Stichting Deltares, and remain the property of  
%   Stichting Deltares. All rights reserved.                                     
%                                                                               
%-------------------------------------------------------------------------------
%   http://www.deltaressystems.com
%   $HeadURL$
%   $Id$

%========================= GENERAL CODE =======================================
T_=1; ST_=2; M_=3; N_=4; K_=5;

if nargin<2
    error('Not enough input arguments')
elseif nargin==2
    varargout={infile(FI,domain)};
    return
elseif ischar(field)
    switch field
        case 'options'
            [varargout{1:2}]=options(FI,cmd,varargin{:});
        case 'domains'
            varargout={domains(FI)};
        case 'dimensions'
            varargout={dimensions(FI)};
        case 'locations'
            varargout={locations(FI)};
        case 'quantities'
            varargout={quantities(FI)};
        case 'getparams'
            varargout={[]};
        case 'data'
            [varargout{1:2}]=getdata(FI,cmd,varargin{:});
    end
    return
else
    Props=field;
end

cmd=lower(cmd);
switch cmd
    case 'size'
        varargout={getsize(FI,Props)};
        return
    case 'times'
        varargout={readtim(FI,Props,varargin{:})};
        return
    case 'timezone'
        [varargout{1:2}]=gettimezone(FI,domain,Props);
        return
    case 'stations'
        varargout={readsts(FI,Props,0)};
        return
    case 'subfields'
        varargout={{}};
        return
    otherwise
        [XYRead,DataRead,DataInCell]=gridcelldata(cmd);
end

DimFlag=Props.DimFlag;

% initialize and read indices ...
idx={[] [] 0 0 0};
fidx=find(DimFlag);
idx(fidx(1:length(varargin)))=varargin;

% select appropriate timestep ...
sz=getsize(FI,Props);
if DimFlag(T_)
    if isempty(idx{T_})
        idx{T_}=sz(T_);
    end
    if isequal(idx{T_},0)
        idx{T_}=1:sz(T_);
    end
end

%========================= GENERAL CODE =======================================
if max(idx{T_})>sz(T_)
    error('Selected timestep (%i) larger than number of timesteps (%i) in file.',max(idx{T_}),sz(T_))
end;

% read grid ...
x=[];
y=[];

% load data ...
%================== NEFIS SPECIFIC CODE =======================================
[T,val1]=jspost('read',FI,Props.Fld,idx{ST_},idx{T_});
val1=permute(val1,[3 2 1]);
if ~isempty(val1)
    val1(val1==-999)=NaN;
    val1(val1==999.999)=NaN;
end
val2=[];

% generate output ...
if XYRead
    Ans.X=x;
    Ans.Y=y;
end
if Props.NVal==0
elseif isempty(val2)
    Ans.Val=val1;
else
    Ans.XComp=val1;
    Ans.YComp=val2;
end

% read time ...
Ans.Time=T;

varargout={Ans FI};
% -----------------------------------------------------------------------------


% -----------------------------------------------------------------------------
function Out=infile(FI,domain);
%
%======================== SPECIFIC CODE =======================================
PropNames={'Name'                          'DimFlag'   'DataInCell' 'NVal'  'Fld'};
DataProps={};
for i=1:length(FI.SubsName)
    DataProps(i,:)={FI.SubsName{i}           [1 5 0 0 0]      0          1      i  };
end
Out=cell2struct(DataProps,PropNames,2);
%======================== SPECIFIC CODE ADD ===================================

% -----------------------------------------------------------------------------


% -----------------------------------------------------------------------------
function sz=getsize(FI,Props)
T_=1; ST_=2; M_=3; N_=4; K_=5;
sz=[0 0 0 0 0];
%======================== SPECIFIC CODE =======================================
sz(T_)=length(FI.Times);
sz(ST_)=length(FI.SegmentName);
% -----------------------------------------------------------------------------


% -----------------------------------------------------------------------------
function T=readtim(FI,Props,t)
%======================== SPECIFIC CODE =======================================
T=FI.Times;
if t~=0
    T=T(t);
end
T=FI.T0+T*FI.TStep;
% -----------------------------------------------------------------------------


% -----------------------------------------------------------------------------
function S=readsts(FI,Props,s)
%======================== SPECIFIC CODE =======================================
S=FI.SegmentName;
if s~=0
    S=S(s);
end
% -----------------------------------------------------------------------------
