#ifndef fk_PARSER_HPP
#define fk_PARSER_HPP

#include "commons.hpp"
#include "Lexer.hpp"

namespace fk
{
  FK_ERROR(syntax_error);

  class Parser
  {
  public:
    explicit Parser(Lexer& lexer);
    virtual ~Parser();

    std::shared_ptr<Node> parse(std::string const& source);
  private:
    Lexer& m_lexer;
    std::vector<std::shared_ptr<Node>> m_tokens;
    size_t m_cursor = 0;

    std::shared_ptr<Node> parse_module();
    std::shared_ptr<Node> parse_expr();
    std::shared_ptr<Node> parse_call();
    std::shared_ptr<Node> parse_lambda();
    std::shared_ptr<Node> parse_params();
    std::shared_ptr<Node> parse_body();
    std::shared_ptr<Node> parse_fundecl();
    std::shared_ptr<Node> parse_vardecl();
    std::shared_ptr<Node> parse_ns();
    std::shared_ptr<Node> parse_import();
    std::shared_ptr<Node> parse_short_import();

    std::shared_ptr<Node> make_node(NodeType type);
    Loc loc() const;
    bool type_is(NodeType type) const;
    bool type_isnt(NodeType type) const;
    bool type_all(std::vector<NodeType> types) const;
    bool type_any(std::vector<NodeType> types) const;

    std::shared_ptr<Node> consume();
    std::shared_ptr<Node> consume(NodeType type);
  };
}

#endif