#ifndef CONSOLE_CLASS
#define CONSOLE_CLASS

#include <deque>
#include <functional>
#include <map>
#include <string>
#include <vector>

class Font;
class Box;
class TextBox;

// The in-game console. Commands get registered by name and run with whatever words follow them.
class Console {
public:
    using Arguments = std::vector<std::string>;   // the words after the command name
    using Command = std::function<void(const Arguments&)>;

    explicit Console(Font* newFont);

    // usage is shown by help, like "give <item> [count]". Names aren't case sensitive.
    void Register(const std::string& name, const std::string& usage, const std::string& description, Command run);
    void Execute(const std::string& line);
    void Print(const std::string& message);

    void Open();
    void Close();
    void Toggle() { open ? Close() : Open(); }
    bool IsOpen() const { return open; }

    // Feed these from the GLFW callbacks while it's open
    void OnChar(unsigned int codepoint);
    void OnKey(int key);

    // Positive goes back toward older lines
    void Scroll(int lines);

    // Once a frame, refreshes what's on screen
    void Update(float dt);

private:
    struct Entry {
        std::string usage;
        std::string description;
        Command run;
    };

    void CreateDisplay();

    Font* font = nullptr;
    std::map<std::string, Entry> commands;   // sorted, so help lists them alphabetically
    std::deque<std::string> log;
    std::vector<std::string> history;
    int historyIndex = 0;                    // history.size() means the line being typed
    std::string input;
    int scroll = 0;                          // how many lines up from the newest
    float caretTimer = 0.0f;
    bool open = false;

    Box* background = nullptr;
    Box* inputBackground = nullptr;
    TextBox* logText = nullptr;
    TextBox* inputText = nullptr;
};

#endif