#include "uri.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fnmatch.h>

#define LINE_LENGTH 1024

#define MATCH_UNEXIST 0
#define MATCH_PATTERN 1
#define MATCH_REVERSE -1

// return 1 if the match and rule should have the main function print this URL.
int match(signed char rule,char *part,char *arg) {
 switch(rule) {
  case MATCH_UNEXIST:
   if(part == 0) return 1;
   break;
  case MATCH_REVERSE:
   if(part) {
     if(!fnmatch(arg,part,FNM_NOESCAPE)) return 0;
     else return 1;
   }
   break;
  case MATCH_PATTERN:
   if(part) if(!fnmatch(arg,part,FNM_NOESCAPE)) return 1;
   break;
  default:
   fprintf(stderr,"oh god. what the hell happened to get here?\n");
   break;
 }
 return 0;
}

int main(int argc,char *argv[]) {//argument needs to be the URI
  int j;
  int ret=1;
  struct uri *u = malloc(sizeof(struct uri));
  char matches;
  signed char rule=MATCH_PATTERN;
  char *line=malloc(LINE_LENGTH);
  char *a,*b,*c;
  char *command;
  char all=0;
  int verbose=0;
  if(argc > 1) {
    if(!strcmp(argv[1],"-a")) {
      all=1;
      argv++;
      argc--;
    }
    if(!strcmp(argv[1],"-v")) {
      verbose++;
      argv++;
      argc--;
    }
  }
  if(argc < 2) {
   fprintf(stderr,"usage: urigetline [-a] uri < uristart.conf\n");
   free(u);
   return 1;
  }
  urifromline(u,argv[1]);//only argv[1] is a URI?
  for(;fgets(line,LINE_LENGTH-1,stdin);) {//each line comes from the config. we need to split it on spaces.
    if(strchr(line,'\r')) *strchr(line,'\r')=0;
    if(strchr(line,'\n')) *strchr(line,'\n')=0;
    if(*line == '#') continue; //skip this line too. comment.
    if(strlen(line) == 0) continue; //skip empty lines.
    if((command=strstr(line,":\t"))) {//this is the "real" separator between match pattern and command
      *command=0;
      command++;
      while(*command == '\t') command++;//and command may have leading tabs that are ignored.
      if(verbose) fprintf(stderr,"loading config line: '%s'\n",line);
    } else {
      fprintf(stderr,"invalid line: '%s'\n",line);
      continue;//skip this line. needs at least one ":\t" to work.
    }
    a=line;
    matches=1;
    for(;a && *a;) {
      rule=MATCH_PATTERN;
      j=0;
      switch(a[0]) {
        case '-': j=1; rule=MATCH_PATTERN; break;
        case 'n': j=1; rule=MATCH_UNEXIST; break;
        case 'r': j=1; rule=MATCH_REVERSE; break;
        default: break;
      }
      b=0;
      c=0;
      if(rule != MATCH_UNEXIST) {
        if(!(b=strchr(a,' '))) {
          fprintf(stderr,"argument '%s' wants a value in the next argument and didn't get it. throwing a fit. (pass -v to urigetline to help debug)\n",a);
	  free(u);
          return 2;
        }
        *b=0; b++;
        if((c=strchr(b,' '))) {//not required
          *c=0; c++;
        }
      } else {
        if((c=strchr(a,' '))) {
          *c=0; c++;
        }
      }
      switch(a[j]) {
        case 's': if(!match(rule,u->scheme,b))       { matches=0;} break;
        case 'u': if(!match(rule,u->username,b))     { matches=0;} break;
        case 'k': if(!match(rule,u->password,b))     { matches=0;} break;
        case 'd': if(!match(rule,u->domain,b))       { matches=0;} break;
        case 'P': if(!match(rule,u->port,b))         { matches=0;} break;
        case 'p': if(!match(rule,u->path,b))         { matches=0;} break;
        case 'q': if(!match(rule,u->query_string,b)) { matches=0;} break;
        case 'f': if(!match(rule,u->fragment_id,b))  { matches=0;} break;
          break;
        default:
          fprintf(stderr,"unknown url part letter! %s\n",a);
	  free(u);
          return 3;
      }
      //if(b) printf("two: %s %s\n",a,b);
      //else printf("one: %s\n",a);
      a=c;
    }
    if(matches) {
      //printf("comm: %s\n",command);
      printf("%s\n",command);
      if(!all) {
        free(u);
        return ret;//bail early if we only need first match
      }
    }
  }
  free(u);
  return ret;
}