//////////////////////////////////////////////////////
//
// LuaConsole:
//
// Used to parse lines of text that are being interactively typed
// in by a user.
//
// Whenever the user types in a line, you should add the line to
// the LuaConsole object.  After adding a line, the console will
// recommend one of several actions:
//
// 1. DO_NOTHING: The input is not complete, so you need to wait.
// 2. DO_COMMAND: Execute a lua command.
// 3. DO_SYNTAX: Print a syntax error message.
// 4. DO_SLASH: Execute a slash-command that bypasses lua.
//
// Also: if the first character of the lua form is '=', then
// replace the '=' with 'return '.
//
//////////////////////////////////////////////////////

#ifndef LUACONSOLE_HPP
#define LUACONSOLE_HPP

#include <string>
#include "luastack.hpp"

class LuaConsole {
public:
    enum {
        DO_NOTHING,  // We need more input text.
        DO_COMMAND,  // We have a valid lua expression.
        DO_SYNTAX,   // We have a syntax error.
        DO_SLASH,    // We have a slash-command.
    };
private:
    lua_State *lua_state_;
    int action_;
    int lines_;
    std::string expression_;
    std::string syntax_;

public:
    LuaConsole();
    ~LuaConsole();

    int action() const { return action_; }
    int lines() const { return lines_; }
    const std::string &expression() const { return expression_; }
    const std::string &syntax() const { return syntax_; }

    void add(std::string line);
    void add_stdin();
    void clear();
};

#endif // LUACONSOLE_HPP