PRO dustem_write_grain_release,file,st,help=help

;+
; NAME:
;   dustem_write_grain_release
;
; PURPOSE:
;   writes information relating to grain parameters to the .DAT files 
;
; CATEGORY:
;    DustEMWrap, Distributed, LowLevel, Initialization
;
; CALLING SEQUENCE:
;   dustem_write_grain_release,dir,st
;
; INPUTS:
;    st   : dustem data structure
;    file  : output file to be written
;
; OPTIONAL INPUT PARAMETERS:
;    None
;
; OUTPUTS:
;    None
;
; OPTIONAL OUTPUT PARAMETERS:
;    None
;
; ACCEPTED KEY-WORDS:
;    help     : writes this help
;
; COMMON BLOCKS:
;    None
;
; SIDE EFFECTS:
;    Files are written
;
; RESTRICTIONS:
;    The DustEM fortran code must be installed
;    The DustEMWrap IDL code must be installed
;
; PROCEDURES AND SUBROUTINES USED:  
;
; EXAMPLES:
;
; MODIFICATION HISTORY:
;    Evolution details on the DustEMWrap gitlab.
;    See http://dustemwrap.irap.omp.eu/ for FAQ and help.  
;-
  
  IF keyword_set(help) THEN BEGIN
     doc_library,'dustem_write_grain_release'
     goto,the_end
  ENDIF
  
  
;Remark: It is a bit odd that this is using both st and (*!dustem_params)
;Remark: This should use automated comment detection, as in dustem_write_gas.pro

;stop

Ncomments=100
c=strarr(Ncomments)

ii=0L
c(ii)='# DUSTEM: definition of grain populations' & ii=ii+1
c(ii)='# for each grain TYPE make sure you have the following files' & ii=ii+1
c(ii)='# Q_TYPE.DAT in code_f90/les_QABS' & ii=ii+1
c(ii)='# C_TYPE.DAT in code_f90/les_CAPA' & ii=ii+1
c(ii)='# if option(MIX) MIX_TYPE.DAT in code_f90/les_DAT' & ii=ii+1
c(ii)='# if option(POL) POL_TYPE.DAT in code_f90/les_DAT' & ii=ii+1
c(ii)='# if option(DTLS) DTLS_TYPE.DAT in code_f90/les_DAT' & ii=ii+1
c(ii)='# if keyword(SIZE) SIZE_TYPE.DAT in code_f90/les_DAT' & ii=ii+1
c(ii)='# Written by the DUSTEM IDL Wrapper: dustem_write_grain_release.pro' & ii=ii+1
c(ii)='#' & ii=ii+1
c(ii)='# run keywords' & ii=ii+1
c(ii)='# G0 scaling factor for radiation field' & ii=ii+1
c(ii)='# grain type, nsize, type keywords, Mdust/MH, rho, amin, amax, alpha/a0 [, at, ac, gamma (ED)] [, au, zeta, eta (CV)]' & ii=ii+1
c(ii)='# cgs units' & ii=ii+1
c(ii)='#' & ii=ii+1
Ncomments=ii
c=c(0:Ncomments-1)

openw,unit,file,/get_lun

FOR i=0,Ncomments-1 DO BEGIN
  printf,unit,c(i)
ENDFOR
;stop

printf,unit,(*!dustem_params).keywords
printf,unit,(*!dustem_params).G0
;printf,unit,(*!dustem_params).ngrains
;===== JPB: updating for longer keywords
;frmt='(A12,I4,A12,11E14.6)'
;frmt='(A12,I4,A20,11E14.6)'
;frmt='(A20,I4,A20,11E14.6)'
frmt='(A25,I4,A20,11E14.6)'
;frmt='(A30,I4,A25,11E14.6)'

;stop

FOR i=0L,(*!dustem_params).ngrains-1 DO BEGIN
   printf,unit,st(i).grain_type, $
          st(i).nsize, $
          st(i).type_keywords, $
          st(i).mdust_o_mh, $
          st(i).rho, $
          st(i).amin, $
          st(i).amax, $
          st(i).alpha_o_a0, $
          st(i).at, $
          st(i).ac, $
          st(i).gamma, $
          st(i).au, $
          st(i).zeta, $
          st(i).eta, $
          format=frmt
   ;IF !dustem_verbose EQ 1 THEN BEGIN
   ; ;stop
   ; print,st(i).grain_type,st(i).nsize,st(i).type_keywords,st(i).mdust_o_mh,st(i).rho,st(i).amin,st(i).amax, $
   ;           st(i).alpha_o_a0, st(i).at,st(i).ac,st(i).gamma,st(i).au,st(i).zeta,st(i).eta,format=frmt
  ;ENDIF
ENDFOR

close,unit
free_lun,unit


the_end:
END