#include "sass.hpp"

#include "remove_placeholders.hpp"

#include "context.hpp"

#include "inspect.hpp"

#include <iostream>

namespace Sass {

    Remove_Placeholders::Remove_Placeholders()

    { }

    void Remove_Placeholders::operator()(Block_Ptr b) {

        for (size_t i = 0, L = b->length(); i < L; ++i) {

            Statement_Ptr st = b->at(i);

            st->perform(this);

        }

    }

    Selector_List_Ptr Remove_Placeholders::remove_placeholders(Selector_List_Ptr sl)

    {

      Selector_List_Ptr new_sl = SASS_MEMORY_NEW(Selector_List, sl->pstate());

      for (size_t i = 0, L = sl->length(); i < L; ++i) {

          if (!sl->at(i)->contains_placeholder()) {

              new_sl->append(sl->at(i));

          }

      }

      return new_sl;

    }

    void Remove_Placeholders::operator()(Ruleset_Ptr r) {

        // Create a new selector group without placeholders

        Selector_List_Obj sl = Cast<Selector_List>(r->selector());

        if (sl) {

          // Set the new placeholder selector list

          r->selector(remove_placeholders(sl));

          // Remove placeholders in wrapped selectors

          for (Complex_Selector_Obj cs : sl->elements()) {

            while (cs) {

              if (cs->head()) {

                for (Simple_Selector_Obj& ss : cs->head()->elements()) {

                  if (Wrapped_Selector_Ptr ws = Cast<Wrapped_Selector>(ss)) {

                    if (Selector_List_Ptr wsl = Cast<Selector_List>(ws->selector())) {

                      Selector_List_Ptr clean = remove_placeholders(wsl);

                      // also clean superflous parent selectors

                      // probably not really the correct place

                      clean->remove_parent_selectors();

                      ws->selector(clean);

                    }

                  }

                }

              }

              cs = cs->tail();

            }

          }

        }

        // Iterate into child blocks

        Block_Obj b = r->block();

        for (size_t i = 0, L = b->length(); i < L; ++i) {

            if (b->at(i)) {

                Statement_Obj st = b->at(i);

                st->perform(this);

            }

        }

    }

    void Remove_Placeholders::operator()(Media_Block_Ptr m) {

        operator()(m->block());

    }

    void Remove_Placeholders::operator()(Supports_Block_Ptr m) {

        operator()(m->block());

    }

    void Remove_Placeholders::operator()(Directive_Ptr a) {

        if (a->block()) a->block()->perform(this);

    }

}