/**
  @file
  @brief Loads CSV and sends to the staging area for approval
  @details this macro used to capture multiple CSVs (eg from one excel file) in
    a staging area and send them all to a landing area.  For simplicity this
    functionality is now deprecated, and each load should be made as a seperate
    request.  If there is a use case to load multiple tables at once, the client
    should manage this and load them seperately.

  @param url= used for debugging (provided by stagedata stp)
  @param dlm= use to provide alternative delimeters for CSVs (not just comma)
  @param [in] termstr= (crlf) Always crlf from adapter, whereas loadfile service
    figures it out

  <h4> SAS Macros </h4>
  @li dc_assignlib.sas
  @li mf_getattrn.sas
  @li mf_getuser.sas
  @li mf_mkdir.sas
  @li mf_verifymacvars.sas
  @li mp_abort.sas
  @li mp_cntlout.sas
  @li mp_dirlist.sas
  @li mp_lockanytable.sas
  @li mpe_accesscheck.sas
  @li mpe_alerts.sas
  @li mpe_xlmapvalidate.sas
  @li mpe_loadfail.sas
  @li mpe_runhook.sas

  @version 9.2
  @author 4GL Apps Ltd
  @copyright 4GL Apps Ltd.  This code may only be used within Data Controller
    and may not be re-distributed or re-sold without the express permission of
    4GL Apps Ltd.
**/

%macro mpe_loader(
    mperef= /* name of subfolder containing the staged data */
    ,mDebug=0 /* set to 1 for development or debugging */
    ,submitted_reason_txt= /* populates column of same name in sumo_approvals*/
    ,approver= /* allows a userid to be provided for direct approval email */
    ,url= /* optional - url for debugging */
    ,dlm=%str(,)
    ,termstr=crlf
    ,dc_dttmtfmt=E8601DT26.6
  );
%put entered mpe_loader from &=_program;
%put &=url;
%put &=termstr;
%put &=dlm;
  /* determine full path to CSV directory */
%local now;
%let now=&dc_dttmtfmt;
%put &=now;

/**
  * get full path to package (only subdirectory passed through)
  */
%mp_abort(
  iftrue=(%mf_verifymacvars(mperef mpelocapprovals)=0)
  ,mac=bitemporal_dataloader
  ,msg=%str(Missing: mperef mpelocapprovals)
)

%let csv_dir=%trim(&mpelocapprovals/&mperef);

/* exit if package has already been uploaded */
%local check;
proc sql noprint;
select count(*) into: check
  from &mpelib..mpe_loads
  where csv_dir="&mperef";
%if &check %then %do;
  %mp_abort(msg=Folder &mperef already has an entry in &mpelib..mpe_loads
      ,mac=mpe_loader.sas);
  %return;
%end;

/* get CSV directory contents */
%mp_dirlist(path=&csv_dir,outds=WORK.getfiles)
data WORK.csvs;
  set WORK.getfiles;
  if upcase(scan(filename,3,'.'))='CSV' then do;
    lib=upcase(scan(filename,1,'.'));
    ds=upcase(scan(filename,2,'.'));
    output;
  end;
run;

/* get table attributes */
proc sql noprint;
create table WORK.sumo_tables as
  select a.filename, b.*
  from WORK.csvs a
  left join &mpelib..mpe_tables b
  on a.lib=b.libref
    and a.ds=b.dsn
  where b.tx_from le &now
    and &now lt b.tx_to;

/* define user as meta user if available */
%local user;
%let user=%mf_getuser();

/* check if there is actually a table to load */
%if %mf_getattrn(WORK.sumo_tables,NLOBS)=0 %then %do;
  %let msg=Table not registered in &mpelib..mpe_tables;
  %mpe_loadfail(
    status=&msg
    ,now=&now
    ,mperef=&mperef
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %mp_abort(msg=&msg,mac=mpe_loader.sas);
  %return;
%end;

proc sql;
insert into &mpelib..mpe_loads
  set USER_NM="&user"
    ,STATUS='IN PROGRESS'
    ,CSV_dir="&mperef"
    ,PROCESSED_DTTM=&now
    ,reason_txt = symget('submitted_reason_txt');


/* import CSV */

%let droplist=;
%let attrib=;
%let droplist=;
%let libref=;
%let DS=;

/* get table info */
data _null_;
  set sumo_tables;
  libds=upcase(cats(libref,'.',dsn));
  call symputx('orig_libds',libds);
  is_fmt=0;
  if substr(cats(reverse(dsn)),1,3)=:'CF-' then do;
    libds=scan(libds,1,'-');
    putlog "Format Catalog Captured";
    libds='work.fmtextract';
    is_fmt=1;
  end;
  call symputx('is_fmt',is_fmt);
  call symputx('libds',libds);
  call symputx('FNAME',filename);
  call symputx('LIBREF',libref);
  call symputx('DS',dsn);
  call symputx('LOADTYPE',loadtype);
  call symputx('BUSKEY',buskey);
  call symputx('VAR_TXFROM',var_txfrom);
  call symputx('VAR_TXTO',var_txto);
  call symputx('VAR_BUSFROM',var_busfrom);
  call symputx('VAR_BUSTO',var_busto);
  call symputx('VAR_PROCESSED',var_processed);
  call symputx('RK_UNDERLYING',RK_UNDERLYING);
  call symputx('POST_EDIT_HOOK',POST_EDIT_HOOK);
  call symputx('NOTES',NOTES);
  call symputx('PK',coalescec(RK_UNDERLYING,buskey));
  call symputx('NUM_OF_APPROVALS_REQUIRED',NUM_OF_APPROVALS_REQUIRED,'l');
  put (_all_)(=);
  stop;
run;

%if %length(&ds)=0 %then %do;
  %let msg=%str(ERR)OR: Unable to extract record from &mpelib..mpe_tables;
  %mpe_loadfail(
      status=FAILED
    ,now=&now
    ,mperef=&mperef
    ,reason_txt=%quote(&msg)
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %mp_abort(msg=&msg,mac=mpe_loader.sas);
  %return;
%end;

/* export format catalog */
%mp_cntlout(
  iftrue=(&is_fmt=1)
  ,libcat=&orig_libds
  ,fmtlist=0
  ,cntlout=work.fmtextract
)

/* user must have EDIT access to load a table */
%mpe_accesscheck(&orig_libds
  ,outds=work.sumo_access
  ,user=&user
  ,access_level=EDIT )
%put exiting accesscheck;

%if %mf_getattrn(work.sumo_access,NLOBS)=0 %then %do;
  %let msg=%str(ERR)OR:  User is not authorised to edit &orig_libds!;
  %mpe_loadfail(
      status=UNAUTHORISED
    ,now=&now
    ,mperef=&mperef
    ,reason_txt=%quote(&msg)
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %mp_abort(msg=&msg,mac=mpe_loader.sas);
  %return;
%end;

%put now importing: "&csv_dir/&fname" termstr=&termstr;
/* get the variables from the CSV */
data vars_csv1(index=(idxname=(varnum name)) drop=infile);
  infile "&csv_dir/&fname" lrecl=32767 dsd termstr=&termstr encoding='utf-8';
  input;
  length infile $32767;
  infile=compress(_infile_,'"',);
  infile=compress(infile,"'",);
  format name $32.;
  putlog 'received vars: ' infile;
  call symputx('received_vars',infile,'l');
  do varnum=1 to countw(infile,"&dlm");
    /* keep writeable chars */
    name=compress(upcase(scan(infile,varnum)),,'kw');
    if name ne "_____DELETE__THIS__RECORD_____" then output;
  end;
  stop;
run;
%put received_vars = &received_vars;

%dc_assignlib(WRITE,&libref)

/* get list of variables and their formats */
proc contents noprint data=&libds
    out=vars(keep=name type length varnum format:);
run;
data vars(keep=name type length varnum format);
  set vars(rename=(format=format2 type=type2));
  name=upcase(name);
  format2=upcase(format2);
  /* not interested in transaction or processing dates
        (append table must be supplied without them) */
  if name not in ("&VAR_TXFROM","&VAR_TXTO","&VAR_PROCESSED"
  ,"_____DELETE__THIS__RECORD_____");
  if type2 in (2,6) then do;
    length format $49.;
    if format2='' then format=cats('$',length,'.');
    else format=cats(format2,max(formatl,length),'.');
    type='char';
  end;
  else do;
    if format2='' then format=cats(length,'.');
    else if format2=:'DATETIME' or format2=:'E8601DT' then do;
      format='DATETIME19.';
    end;
    else if format2=:'DATE' or format2=:'DDMMYY'
      or format2=:'MMDDYY' or format2=:'YYMMDD'
      or format2=:'E8601DA' or format2=:'B8601DA'
    then do;
      format='DATE9.';
    end;
    else if format2='BEST' & formatl=0 then format=cats('BEST',length,'.');
    /*
    else if format2=:'DATETIME' or format2=:'DATE' or format2=:'DDMMYY'
      or format2=:'MMDDYY' or format2=:'YYMMDD' then do;
      *date or datetime format so use original ;
      dsid=open("&libref..&ds");
      vnum=varnum(dsid,name);
      format=varfmt(dsid,vnum);
      dsid=close(dsid);
    end;
    */
    else do;
      if formatl=0 then formatl=length;
      format=cats(format2,formatl,'.',formatd);
    end;
    type='num';
  end;
  put (_all_)(=);
run;

/* build attrib statement */
data vars_attrib;
  length attrib_statement $32767 type2 $20;
  set vars end=lastobs;
  retain attrib_statement;

  if type='char' then type2='$';
  str1=catx(' ',name,'length=',cats(type2,length));
  attrib_statement=trim(attrib_statement)!!' '!!trim(str1);

  if lastobs then call symputx('ATTRIB',attrib_statement,'L');
run;

/* build input statement - first get vars in right order
      and join with target formats*/
proc sql noprint;
create table vars_csv2 as
  select b.*
  from vars_csv1 a
  left join vars_attrib b
  on a.name=b.name
  order by a.varnum;


/* now build input statement */
data final_check;
  set vars_csv2 end=lastobs;
  length input_statement $32767 type2 $20 droplist $32767;
  retain input_statement droplist;

  /* Build input statement - CATCH EXCEPTIONS HERE!*/
  if name in ('QUOTE_DTTM') then do;
    name=cats(name,'2');
    droplist=catx(' ',trim(droplist),name);
    type2='$20.';/* converted below */
  end;
  else if type='char' then type2=cats('$CHAR', length,'.');
  else if format='DATE9.' then type2='ANYDTDTE.';
  else if format='DATETIME19.' then type2='ANYDTDTM.';
  else if format=:'TIME' then type2='ANYDTTME.';
  else if name='' then do;/* additional vars in input data */
    name='_____DELETE__THIS__VARIABLE_____';
    droplist=catx(' ',trim(droplist),'_____DELETE__THIS__VARIABLE_____');
    type2='$1.';
  end;
  else type2='best32.';
  * else type2=cats(length,'.');

  input_statement=catx(' ',input_statement,name,':',type2);

  if lastobs then do;
    call symputx('INPUT', input_statement,'L');
    if trim(droplist) ne '' then
      call symputx('droplist',"drop "!!droplist!!';','l');
  end;
run;

%let mpeloadstop=0;

data work.STAGING_DS;
  &droplist;
  infile "&csv_dir/&fname" dsd dlm="&dlm" lrecl=32767
          firstobs=2 missover termstr=&termstr encoding='utf-8';
  attrib &attrib ;
  if _n_=1 then call missing (of _all_);
  missing a b c d e f g h i j k l m n o p q r s t u v w x y z _;
  input
  %if %scan(%quote(&received_vars),1)=_____DELETE__THIS__RECORD_____ %then %do;
    _____DELETE__THIS__RECORD_____: $3.
  %end;
    &input;

  %if %index(%quote(&attrib.),UNLIKELY_VAR ) %then %do;
    /*UNLIKELY_VAR=input(UNLIKELY_VAR2,ANYDTDTM21.);*/
    /* SPECIAL LOGIC FOR SPECIAL VARS */
  %end;

  if _error_ ne 0 then do;
    putlog _infile_;
    call symputx('mpeloadstop',_n_);
    stop;
  end;
  /* remove all blank rows */
  if compress(cats(of _all_),'.')=' ' then delete;
run;

%if &mpeloadstop>0 %then %do;
  %if %symexist(SYSPRINTTOLOG) %then %let logloc=&SYSPRINTTOLOG;
  %else %let logloc=%qsysfunc(getoption(LOG));
  %put redirecting log output to capture return message;
  %put currentloc=&logloc;
  filename tmp temp;
  proc printto log=tmp;run;
  data _null_;
    &droplist;
    infile "&csv_dir/&fname" dsd dlm="&dlm" lrecl=32767 firstobs=2
        missover termstr=&termstr;
    attrib &attrib ;
    input
    %if %scan(%quote(&received_vars),1)=_____DELETE__THIS__RECORD_____
    %then %do;
      _____DELETE__THIS__RECORD_____: $3.
    %end;
      &input;
    if _error_ then stop;
  run;
  /* get log back */
  proc printto log=&logloc;run;
  data _null_; infile tmp; input; putlog _infile_;run;
  /* scan log for invalid data warning */
  data _null_;
    infile tmp;
    input;
    length msg1 msg2 msg3 msg4 msg5 msg url $32767;
    if index(_infile_,'NOTE: Invalid data for') then do;
      msg1=_infile_;
      input;
      msg2=_infile_;
      input;
      msg3=_infile_;
      input;
      msg4=_infile_;
      input;
      msg5=_infile_;
      url=symget('url');
      msg=catx('\n',msg1,msg2,msg3,msg4,msg5,'\n',url);
      call symputx('msg',msg);
      stop;
    end;
  run;

  %mpe_loadfail(
    status=FAILED
    ,now=&now
    ,mperef=&mperef
    ,reason_txt=%superq(msg)
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %return;
%end;

/* check that the table is unique on PK */
proc sort data=work.STAGING_DS dupout=work.MPE_DUPS (keep=&pk) nodupkey;
  by &pk;
run;
%if %mf_getattrn(work.MPE_DUPS,NLOBS)>0 %then %do;
  %local duplist;
  data _null_;
    set work.mpe_dups;
    %do i=1 %to %sysfunc(countw(&pk));
      %let iWord=%scan(&pk,&i);
      call symputx('duplist',symget('duplist')!!
        " &iWord="!!cats(&iWord));
    %end;
  run;
  %let msg=This upload contains duplicates on the Primary Key columns %trim(
    )(&pk) \n Please remove the duplicates and try again. %trim(
    )\n &duplist \n ;
  %mp_abort(msg=%superq(msg),mac=mpe_loader.sas);
  %return;
%end;

%if &syscc gt 4 %then %do;
  %let msg=SYSCC=&syscc prior to post edit hook (%superq(syserrortext));
  %mpe_loadfail(
      status=FAILED - &syscc
    ,now=&now
    ,mperef=&mperef
    ,reason_txt=%superq(msg)
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %return;
%end;

/* If a Complex Excel Upload, needs to have the load ref added to the table */
%mpe_xlmapvalidate(&mperef,work.staging_ds,&mpelib,&orig_libds)

/* Run the Post Edit Hook prior to creation of staging folder */
%mpe_runhook(POST_EDIT_HOOK)

/* stop if err */
%if &syscc gt 4 %then %do;
  %let msg=ERR in post edit hook (&post_edit_hook);
  %mpe_loadfail(
      status=FAILED - &syscc
    ,now=&now
    ,mperef=&mperef
    ,reason_txt=%quote(&msg)
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %return;
%end;


/**
  * send to approve process
  */

/* create a dataset key (datetime plus 3 digit random number plus PID) */

/* send dataset to approvals subfolder with same name as subfolder */
libname approval "&mpelocapprovals/&mperef";
data approval.&mperef;
  set work.staging_ds;
run;
proc export data=approval.&mperef
  outfile="&mpelocapprovals/&mperef/&mperef..csv"
  dbms=csv
  replace;
run;

/* update the control dataset with relevant info */
data append_app;
  if 0 then set &mpelib..mpe_submit;/* get formats */
  call missing (of _all_);
  TABLE_ID="&mperef";
  submit_status_cd='SUBMITTED';
  submitted_by_nm="%mf_getuser()";
  base_lib="&libref";
  base_ds="&ds";
  submitted_on_dttm=&now;
  submitted_reason_txt=symget('submitted_reason_txt');
  input_vars=%mf_getattrn(approval.&mperef,NVARS);
  input_obs=%mf_getattrn(approval.&mperef,NLOBS);
  num_of_approvals_required=&NUM_OF_APPROVALS_REQUIRED;
  num_of_approvals_remaining=&NUM_OF_APPROVALS_REQUIRED;
  reviewed_by_nm='';
  reviewed_on_dttm=.;
run;

%mp_lockanytable(LOCK,lib=&mpelib,ds=mpe_submit,
  ref=%str(&mperef update in &_program),
  ctl_ds=&mpelib..mpe_lockanytable
)
proc append base= &mpelib..mpe_submit data=append_app;
run;
%mp_lockanytable(UNLOCK,
  lib=&mpelib,ds=mpe_submit,
  ctl_ds=&mpelib..mpe_lockanytable
)

/* send email to REVIEW members */
%put sending mpe_alerts;
%mpe_alerts(alert_event=SUBMITTED
  , alert_lib=&libref
  , alert_ds=&ds
  , dsid=&mperef
)
/* DISABLE EMAIL FOR NOW
  %let b2=REASON: %quote(&submitted_reason_txt);

  %local URLNOTES;
  %if %length(&notes)>0 %then %let URLNOTES=%quote(%sysfunc(urlencode(&notes)));

  %let b3=%str(Click to review / approve: )%trim(
      )%str(http://&_srvname:&_srvport&_url?_PROGRAM=/Web/approvals&)%trim(
      )TABLEID=&dsid%str(&)BASETABLE=&libref..&ds%str(&)NOTES=&URLNOTES;

  %let b4=%str(Reference ID: &mperef);
*/

%put mpe_loader finishing up with syscc=&syscc;
%if &syscc le 4 %then %do;
  %local dur;
  data _null_;
    now=symget('now');
    dur=%sysfunc(datetime())-&now;
    call symputx('dur',dur,'l');
    putlog 'Updating mpe_loads with the following query:';
    putlog "update &mpelib..mpe_loads set STATUS='SUCCESS'";
    putlog "    , duration=" dur;
    putlog "    , processed_dttm=" now;
    putlog "    , approvals = '&libref..&ds'";
    putlog "  where CSV_DIR='&mperef';";
  run;
  proc sql;
  update &mpelib..mpe_loads set STATUS='SUCCESS'
        , duration=&dur
        , processed_dttm=&now
        , approvals = "&libref..&ds"
    where CSV_DIR="&mperef";
%end;
%else %do;
  %mpe_loadfail(
    status="FAILED - &syscc"
    ,now=&now
    ,approvals=&libref..&ds
    ,mperef=&mperef
    ,dc_dttmtfmt=&dc_dttmtfmt.
  )
  %return;
%end;

%mend mpe_loader;