#include "prepass.h"
#include "lib/sym.h"
#include "node.h"

void prepass_init(prepass_t* prepass,
                  sym_t* sym,
                  tysolver_t* tysolver,
                  err_t* err)
{
  assert(prepass);
  assert(sym);
  assert(tysolver);
  assert(err);

  prepass->sym = sym;
  prepass->tysolver = tysolver;
  prepass->err = err;

  prepass->scope = 0;
}

void prepass_free(prepass_t* prepass)
{
  assert(prepass);
}

void prepass_run(prepass_t* prepass, node_t* node)
{
  assert(prepass);
  assert(node);

  switch (node->type)
    {
    case NODE_BLOCK: {
      prepass->scope++;

      for (size_t i=0; i<node->children.size; i++)
        {
          node_t* child = (node_t*) node->children.data[i];
          prepass_run(prepass, child);
        }

      prepass->scope--;
    } break;

    case NODE_VARDECL: {
      char* name = ((node_t*) node->children.data[0])->value.data;
      node_t* block = node_try_find_parent(node, NODE_BLOCK);

      prepass_run(prepass, (node_t*) node->children.data[1]);

      type_t* type = tysolver_try_solve_node(prepass->tysolver,
                                             (node_t*) node->children.data[1]);

      sym_declare(prepass->sym, name, type,
                  prepass->scope, SYM_PRE,
                  block);

    } break;

    default: {
      for (size_t i=0; i<node->children.size; i++)
        {
          prepass_run(prepass, (node_t*) node->children.data[i]);
        }
    } break;
    }
}