#ifndef LH_ITERATORS_H
#define LH_ITERATORS_H

#include "types.h"

namespace litehtml {
class element;

class iterator_selector {
 public:
  virtual bool select(const element::ptr& el) = 0;

 protected:
  ~iterator_selector() = default;
};

class elements_iterator {
 private:
  struct stack_item {
    int idx;
    element::ptr el;
    stack_item() : idx(0) {}
    stack_item(const stack_item& val) {
      idx = val.idx;
      el = val.el;
    }
    stack_item(stack_item&& val) {
      idx = val.idx;
      el = std::move(val.el);
    }
  };

  std::vector<stack_item> m_stack;
  element::ptr m_el;
  int m_idx;
  iterator_selector* m_go_inside;
  iterator_selector* m_select;

 public:
  elements_iterator(const element::ptr& el, iterator_selector* go_inside, iterator_selector* select) {
    m_el = el;
    m_idx = -1;
    m_go_inside = go_inside;
    m_select = select;
  }

  ~elements_iterator() = default;

  element::ptr next(bool ret_parent = true);

 private:
  void next_idx();
};

class go_inside_inline final : public iterator_selector {
 public:
  bool select(const element::ptr& el) override;
};

class go_inside_table final : public iterator_selector {
 public:
  bool select(const element::ptr& el) override;
};

class table_rows_selector final : public iterator_selector {
 public:
  bool select(const element::ptr& el) override;
};

class table_cells_selector final : public iterator_selector {
 public:
  bool select(const element::ptr& el) override;
};
}  // namespace litehtml

#endif  // LH_ITERATORS_H
