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/*

  pkgit - package it!

  Copyright (C) 2026 dacctal
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/

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

#include "lua_state.h"
#include "set_install_directories.h"
#include "vars.h"

void set_install_directories() {
  lua_State *L = get_lua_state();
  cache_prefix_directory();
  lua_getglobal(L, "install_directories");
  if (!lua_istable(L, -1)) {
    printf(
      "%slua variable 'install_directories' is not a table.\n",
      print_error
    );
  }

  lua_pushnil(L);
  while (lua_next(L, -2) != 0) {
    const char *key = lua_tostring(L, -2);
    const char *value = lua_tostring(L, -1);
    if (key && value) {
      map_put(&cached_install_directories, strdup(key), strdup(value));
    }
    lua_pop(L, 1);
  }
}

void map_init(Map *map) {
  map->items = NULL;
  map->size = 0;
  map->capacity = 0;
}

void map_put(Map *map, char *key, char *value) {
  for (size_t i = 0; i < map->size; i++) {
    if (strcmp(map->items[i].key, key) == 0) {
      free(map->items[i].value);
      map->items[i].value = value;
      free(key);
      return;
    }
  }

  if (map->size >= map->capacity) {
    size_t new_capacity = map->capacity == 0 ? 8 : map->capacity * 2;
    MapItem *new_items = realloc(map->items, new_capacity * sizeof(MapItem));
    if (!new_items)
      return;
    map->items = new_items;
    map->capacity = new_capacity;
  }

  map->items[map->size].key = key;
  map->items[map->size].value = value;
  map->size++;
}

char *map_get(Map *map, const char *key) {
  for (size_t i = 0; i < map->size; i++) {
    if (strcmp(map->items[i].key, key) == 0) {
      return map->items[i].value;
    }
  }
  return NULL;
}