/*
  Copyright 2019 Wojciech Kosior
  
  This is free and unencumbered software released into the public domain.

  Anyone is free to copy, modify, publish, use, compile, sell, or
  distribute this software, either in source code form or as a compiled
  binary, for any purpose, commercial or non-commercial, and by any
  means.

  In jurisdictions that recognize copyright laws, the author or authors
  of this software dedicate any and all copyright interest in the
  software to the public domain. We make this dedication for the benefit
  of the public at large and to the detriment of our heirs and
  successors. We intend this dedication to be an overt act of
  relinquishment in perpetuity of all present and future rights to this
  software under copyright law.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.

  For more information, please refer to <http://unlicense.org/>
*/


// I didn't take the effort to clean up this file as I did with
// hashtable.c and hashtable.h. It's not really important, tho.
// Instead of this "console hashtable" I should make some test cases
// (which I probably won't be motivated enough to do anyway).

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

#include "hashtable.h"

void print_pair(const char *key, const char *val, void *dummy){
  printf("key: %s   val: %s\n", key, val);
}

void free_pair(void *key, void *val, void *dummy){
  free(key);
  free(val);
}

int main(int argc, char **argv){
  hashtable_t ht;
  if (ht_string_init(&ht)) // HT_NO_MEM
    {
      fprintf(stderr, "ERROR, couldn't allocate memory!\n");
      exit(-1);
    }

  char buf[100];

  while (scanf("%99s", buf) != EOF) {
    if (!strcmp(buf, "add")) {
      if (scanf("%99s", buf) == EOF) break;
      
      size_t len = strlen(buf) + 1;
      char *key = malloc(len);
      if (key == NULL) {
	fprintf(stderr, "ERROR, couldn't allocate memory!\n");
	exit(1);
      }
      
      memcpy(key, buf, len);
      
      if (scanf("%99s", buf) == EOF) {
	free(key);
	break;
      }
      
      len = strlen(buf) + 1;
      char *val = malloc(len);
      if (val == NULL) {
	free(key);
	fprintf(stderr, "ERROR, couldn't allocate memory!\n");
	exit(1);
      }
      
      memcpy(val, buf, len);

      switch (ht_add(&ht, key, val))
	{
	case HT_OK:
	  break;
	case HT_NO_MEM:
	  fprintf(stderr, "ERROR, couldn't allocate memory!\n");
	  free(key); free(val);
	  exit(1);
	default: // case HT_KEY_PRESENT
	  printf("Key already present!\n");
	}
    } 
    else if (!strcmp(buf, "set")) {
      if (scanf("%99s", buf) == EOF) break;

      size_t len = strlen(buf) + 1;
      char *key = malloc(len);
      if (key == NULL) {
	fprintf(stderr, "ERROR, couldn't allocate memory!\n");
	exit(1);
      }

      memcpy(key, buf, len);

      if (scanf("%99s", buf) == EOF) break;

      len = strlen(buf) + 1;
      char *val = malloc(len);
      if (val == NULL) {
	free(key);
	fprintf(stderr, "ERROR, couldn't allocate memory!\n");
	exit(1);
      }

      memcpy(val, buf, len);

      void *oldkey = NULL, *oldval = NULL;
      if (ht_set(&ht, key, val, &oldkey, &oldval) != 0) {
	free(key); free(val);
	
	fprintf(stderr, "ERROR, couldn't allocate memory!\n");
	exit(1);
      }
      
      if (oldval != NULL) {
	printf("Replaced: %s\n", (char*) oldval);
	free(oldval); free(oldkey);
      }
    }
    else if (!strcmp(buf, "get")) {
      if (scanf("%99s", buf) == EOF) break;
      
      void *val;
      if (ht_get(&ht, buf, NULL, &val))
	printf("No such entry!\n");
      else printf("%s\n", (char*) val);
    }
    else if (!strcmp(buf, "rem")) {
      if (scanf("%99s", buf) == EOF) break;

      void *storedkey, *val;
      if (ht_rem(&ht, buf, &storedkey, &val))
	printf("No such entry!\n");
      else {
	printf("%s\n", (char*) val);
	free(val); free(storedkey);
      }
    }
    else if(!strcmp(buf, "entries")) printf("%zu\n", ht.entries);
    else if(!strcmp(buf, "print"))
      ht_map(&ht, NULL, (void (*)(void*, void*, void*)) &print_pair);
    else printf("I have no idea what you're talking about...\n");
  }

  ht_map_destroy(&ht, NULL,
		 (void (*)(void*, void*, void*)) &free_pair);
}