#include "sym.h"

void sym_init(sym_t* sym, tysy_t* tysy, err_t* err)
{
  assert(sym);

  sym->tysy = tysy;
  sym->err = err;

  sym->entries.id_counter = 0;
  sym->entries.size = 0;
  sym->entries.cap = 0;
  sym->entries.data = NULL;
}

void sym_free(sym_t* sym)
{
  assert(sym);

  for (size_t i=0; i<sym->entries.size; i++)
    {
      sym_entry_t* entry = sym->entries.data[i];
      free(entry->name);
      free(entry);
    }

  free(sym->entries.data);
  sym->entries.size = 0;
  sym->entries.cap = 0;
}

int sym_declare(sym_t* sym, char* name, type_t* type)
{
  assert(sym);
  assert(name);
  assert(type);

  if (sym->entries.data == NULL)
    {
      sym->entries.cap = 2;
      sym->entries.data = malloc(sizeof(sym_entry_t*)
                                 * sym->entries.cap);
    }

  if (sym->entries.size >= sym->entries.cap)
    {
      sym->entries.cap *= 2;
      sym->entries.data = realloc(sym->entries.data,
                                  sizeof(sym_entry_t*) * sym->entries.cap);
    }

  sym->entries.data[sym->entries.size] = malloc(sizeof(sym_entry_t));

  int id = sym->entries.id_counter;
  sym->entries.id_counter++;

  sym->entries.data[sym->entries.size]->name = strdup(name);
  sym->entries.data[sym->entries.size]->id = id;
  sym->entries.data[sym->entries.size]->type = type;

  sym->entries.size++;

  return id;
}

sym_entry_t* sym_try_find_by_name(sym_t* sym, char* name)
{
  assert(sym);

  for (size_t i=0; i<sym->entries.size; i++)
    {
      if (strcmp(sym->entries.data[i]->name, name) == 0)
        {
          return sym->entries.data[i];
        }
    }

  return NULL;
}

size_t sym_str(sym_t* sym, char* buffer, size_t size)
{
  assert(sym);
  assert(buffer);
  size_t sz = 0;

  for (size_t i=0; i<sym->entries.size; i++)
    {
      sym_entry_t* entry = sym->entries.data[i];
      sz += snprintf(buffer + sz, size - sz, "(%d %s ",
                     entry->id, entry->name);

      sz += type_str(entry->type, buffer + sz, size - sz);

      sz += snprintf(buffer + sz, size - sz, ")\n");
    }

  return sz;
}