%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <linux/unistd.h>


  char *yy_private_error_guess = "";

%}

%token NAME STRING NUMBER EQUAL SEMICOLON REPLICATION LEFTBRACE RIGHTBRACE SOURCE TARGET RIGHTBRACKET COMMA LEFTBRACKET

%%

replication_declarations : | 
                           replication_declarations replication_declaration 
                           ;

replication_declaration : 
                          {yy_private_error_guess = "Expecting keyword 'replication'";} 
                          REPLICATION
                          {yy_private_error_guess = "Expecting string";} 
                          STRING 
                          {yy_private_error_guess = "Expecting '{'";} 
                          LEFTBRACE 
	                  {yy_private_error_guess = "Expecting variable declarations";}   
                          variable_declarations 
	                  {yy_private_error_guess = "Expecting source declaration";}   
                          source_declaration 
	                  {yy_private_error_guess = "Expecting target declaration";}   
                          target_declaration 
	                  {yy_private_error_guess = "Expecting '}'";}   
                          RIGHTBRACE 
                          ;

variable_declarations : | variable_declarations simple_declaration 
                        ;

source_declaration : 
                     {yy_private_error_guess = "Expecting keyword 'source'";}   
                     SOURCE
                     {yy_private_error_guess = "Expecting keyword quoted string";}   
                     STRING 
                     {yy_private_error_guess = "Expecting '{'";}   
                     LEFTBRACE 
                     {yy_private_error_guess = "Expecting variable declarations";}   
                     variable_declarations 
                     {yy_private_error_guess = "Expecting '{'";}   
                     RIGHTBRACE
                     ;

target_declaration : 
                     {yy_private_error_guess = "Expecting keyword 'target'";}   
                     TARGET
                     {yy_private_error_guess = "Expecting keyword quoted string";}   
                     STRING
                     {yy_private_error_guess = "Expecting '{'";}   
                     LEFTBRACE 
                     {yy_private_error_guess = "Expecting variable declarations";}   
                     variable_declarations 
                     {yy_private_error_guess = "Expecting '{'";}   
                     RIGHTBRACE
                     ;

simple_declaration : 
                     {yy_private_error_guess = "Expecting unquoted name\n";}
                     NAME
                     {yy_private_error_guess = "Expecting '='\n";}
                     EQUAL
                     {yy_private_error_guess = "Expecting value\n";}
                     value
                     {yy_private_error_guess = "Expecting semicolon\n";}
                     SEMICOLON
                     ;

value : STRING | NAME | NUMBER | list
        ;

list : LEFTBRACKET elements RIGHTBRACKET 
       ;

elements : element additional ;

additional : | element additional ;

element : STRING | NAME ;

%%

char *configuration_file = "replication.conf";
int main(int argc, char **argv)
{
  printf("Found %d arguments...\n",argc);

  // parse config file
  char opt;
  extern char *optarg;

  while((opt = getopt(argc,argv,"c:C:")) != -1)
    {
      switch(opt)
      {
      case 'c':
      case 'C':
	configuration_file = optarg;
	break;
      }
    }

  // read in configuration
  FILE *f = fopen(configuration_file,"r");
  if(f)
    {
      yyrestart(f);
      yyparse();
      printf("Parsed!\n");
    }
  else
    {
      printf("Couldn't open %s!\n",configuration_file);
      exit(1);
    }


}