#include <stdio.h>
#include <string.h>
#include <math.h>
#include "diag.h"
#include "parms.h"
#include "init.h"

extern char whites[];		/*  white chars (init)	*/
extern char line[];		/*  parsing buf. (init)	*/

/*  Prototypes  */
extern void setall(long iseed1,long iseed2);	/* rnds */
static void ReadCerfiles(FILE *parfile);

static void ReadCerfiles(FILE *parfile)
{   char *value_ptr = NULL;		/*  ptr at parm value	*/
    extern FILE *GetNextFile(char *cername);	/*  in main.c	*/

    filelist = parfile;
    parfile = NULL;
    if (fgets(line, LINE_MAX_LENGTH, filelist) == NULL ||
	(value_ptr=strtok(line, whites)) == NULL)
	FatalError(FLST_NSPEC_FTL); 
    else if (value_ptr[0] == '@')
    {	fclose(filelist);
	if ((filelist=fopen(value_ptr+1, "r")) == NULL)
	    FatalError(FLST_NFND__FTL, value_ptr+1);
	else if (fgets(line, LINE_MAX_LENGTH, filelist) == NULL)
	    FatalError(FLST_NSPEC_FTL); 
	value_ptr = strtok(line, whites);   }

    /*  Set cername and find out event number bounds  */
    strcpy(cername, value_ptr);
    if ((value_ptr=strtok(NULL, whites)) == NULL)
    {	first_Event = 0;
	last_Event  = 1000000;   }
    else
    {	first_Event = atol(value_ptr);
	value_ptr = strtok(NULL, whites);
	last_Event = value_ptr ? atol(value_ptr) : 1000000;  }

    /*  Try to open cerfile.  */

    if ((cerfile=fopen(cername, "r")) == NULL)
    {   Message(CERF_NFND__MSG, cername);
	cerfile=GetNextFile(cername);  }

    /*  If no valid cerfile is found then exit  */
    if (cerfile == NULL)
	FatalError(CERF_NSPEC_FTL);

    /*  Check boundaries  */
    if (first_Event > last_Event)
    {	Error(EVTN_WRONG_ERR, first_Event, last_Event, cername);
	first_Event = 0;
	last_Event  = 1000000;  }

}   /*  end of ReadCerfiles  */

void ParmsSwitch(FILE *parfile)
{   char *value_ptr = NULL;	/*  ptr at parm value	*/
    int   switch_end = FALSE;	/*  bool to exit loop	*/
    extern FILE *geofile;	/*  geo file (init)	*/
    extern void SetVerbose(int vlevel);		    /*  from diag.c	*/
    extern void SetAtmModel(char *model);	    /*  from atm.c	*/
    extern int ParseLine(FILE *parfile,		    /*  FILE with parms	*/
			 const char *token_list[],  /*  array w/tokens	*/
			 int tokens,		    /*  nr of tokens	*/
			 char **value_ptr);	    /*  ptr->parm val.	*/

    do  
    {	switch(ParseLine(parfile, parms, ARRAY_SZ(parms), &value_ptr))
	{   case output_file:
		 if ((rflfile=fopen(value_ptr, "w+")) == NULL)
		     FatalError(OUTF_ERROR_FTL, value_ptr);
		 Message(OUTF_OPEN__MSG, value_ptr);
		 break;
	    case ct_file:
		 if ((geofile=fopen(value_ptr, "r")) == NULL)
		     FatalError(GEOF_ERROR_FTL, value_ptr);
		 Message(GEOF_OPEN__MSG, value_ptr);
		 strcat(strcpy(ct_BinaryName, value_ptr), ".mirr");
		 ct_BinaryData = fopen(ct_BinaryName, "r");
		 break;
	    case atm_model:
		 SetAtmModel(value_ptr);
		 break;
	    case verbose_level:
		 SetVerbose(atoi(value_ptr));
		 break;
	    case fixed_target:
		 is_Fixed_Target = TRUE;
		 fixed_Theta = (float) atof(value_ptr);
		 value_ptr = strtok(NULL, whites);
		 if (value_ptr == NULL)
		 {   Error(FIXD_TARGT_ERR);
		     is_Fixed_Target = FALSE; }
		 else
		 {   fixed_Phi = (float) atof(value_ptr);
		     Message(FIXD_ENABL_MSG, fixed_Theta, fixed_Phi);
		     fixed_Theta *= (float) (M_PI/180.);
		     fixed_Phi   *= (float) (M_PI/180.); }
		 break;
	    case max_events:
		 Message(MAX__EVTS__MSG, max_Events=atol(value_ptr));
		 break;
	    case energy_cuts:
		 low_Ecut = (float) atof(value_ptr);
		 value_ptr = strtok(NULL, whites);
		 if (value_ptr == NULL)
		 {   Error(ENRG_LIMIT_ERR);
		     low_Ecut = 0.; }
		 else
		 {   high_Ecut = (float) atof(value_ptr);
		     Message(ENRG_CUTS__MSG, low_Ecut, high_Ecut); }
		 break;
	    case seeds:
		 Seeds[0] = atol(value_ptr);
		 value_ptr = strtok(NULL, whites);
		 if (value_ptr) Seeds[1] = atol(value_ptr);
		 else
		 {   Error(SEED_ERROR_ERR);
		     Seeds[0] = 3141592L; }
		 break;
	    case random_pointing:
	    case repeat_random:
/********************************/
		 break;

	    case cer_files:
		 ReadCerfiles(parfile);
		 switch_end = TRUE;
	    default: switch_end = TRUE;
		     break;  }}
    while (!switch_end);

    if (filelist == NULL)
	FatalError(FLST_NSPEC_FTL);

    /*  Set random seeds  */
    setall(Seeds[0], Seeds[1]);
    Message(SEED_SET___MSG, Seeds[0], Seeds[1]);

}   /*  end of ParmsSwitch  */
