module;

export module Core.Terminal;

export import Core.Vector;

#define ESC "\33["

export namespace Core {
    namespace Terminal {
        inline constexpr const char RESET[] = ESC "0m";
        inline constexpr const char BOLD[] = ESC "1m";
        // foreground colors
        inline constexpr const char FG_BLACK[] = ESC "30m";
        inline constexpr const char FG_RED[] = ESC "31m";
        inline constexpr const char FG_GREEN[] = ESC "32m";
        inline constexpr const char FG_YELLOW[] = ESC "33m";
        inline constexpr const char FG_BLUE[] = ESC "34m";
        inline constexpr const char FG_MAGENTA[] = ESC "35m";
        inline constexpr const char FG_CYAN[] = ESC "36m";
        inline constexpr const char FG_WHITE[] = ESC "37m";
        inline constexpr const char FG_BRIGHT_BLACK[] = ESC "90m";
        inline constexpr const char FG_BRIGHT_RED[] = ESC "91m";
        inline constexpr const char FG_BRIGHT_GREEN[] = ESC "92m";
        inline constexpr const char FG_BRIGHT_YELLOW[] = ESC "93m";
        inline constexpr const char FG_BRIGHT_BLUE[] = ESC "94m";
        inline constexpr const char FG_BRIGHT_MAGENTA[] = ESC "95m";
        inline constexpr const char FG_BRIGHT_CYAN[] = ESC "96m";
        inline constexpr const char FG_BRIGHT_WHITE[] = ESC "97m";
        // background colors
        inline constexpr const char BG_BLACK[] = ESC "40m";
        inline constexpr const char BG_RED[] = ESC "41m";
        inline constexpr const char BG_GREEN[] = ESC "42m";
        inline constexpr const char BG_YELLOW[] = ESC "43m";
        inline constexpr const char BG_BLUE[] = ESC "44m";
        inline constexpr const char BG_MAGENTA[] = ESC "45m";
        inline constexpr const char BG_CYAN[] = ESC "46m";
        inline constexpr const char BG_WHITE[] = ESC "47m";
        inline constexpr const char BG_BRIGHT_BLACK[] = ESC "100m";
        inline constexpr const char BG_BRIGHT_RED[] = ESC "101m";
        inline constexpr const char BG_BRIGHT_GREEN[] = ESC "102m";
        inline constexpr const char BG_BRIGHT_YELLOW[] = ESC "103m";
        inline constexpr const char BG_BRIGHT_BLUE[] = ESC "104m";
        inline constexpr const char BG_BRIGHT_MAGENTA[] = ESC "105m";
        inline constexpr const char BG_BRIGHT_CYAN[] = ESC "106m";
        inline constexpr const char BG_BRIGHT_WHITE[] = ESC "107m";
        // keycodes
        inline constexpr const unsigned long KEY_UNKNOWN = 0x1'0000'0000lu;
        // default keycodes
        inline constexpr const unsigned long KEY_ARROW_LEFT = 0x1'0000'0001lu;
        inline constexpr const unsigned long KEY_ARROW_RIGHT = 0x1'0000'0002lu;
        inline constexpr const unsigned long KEY_ARROW_UP = 0x1'0000'0003lu;
        inline constexpr const unsigned long KEY_ARROW_DOWN = 0x1'0000'0004lu;
        inline constexpr const unsigned long KEY_DELETE = 0x1'0000'0005lu;
        inline constexpr const unsigned long KEY_F1 = 0x1'0000'0006lu;
        inline constexpr const unsigned long KEY_F2 = 0x1'0000'0007lu;
        inline constexpr const unsigned long KEY_F3 = 0x1'0000'0008lu;
        inline constexpr const unsigned long KEY_F4 = 0x1'0000'0009lu;
        inline constexpr const unsigned long KEY_F5 = 0x1'0000'000Alu;
        inline constexpr const unsigned long KEY_F6 = 0x1'0000'000Blu;
        inline constexpr const unsigned long KEY_F7 = 0x1'0000'000Clu;
        inline constexpr const unsigned long KEY_F8 = 0x1'0000'000Dlu;
        inline constexpr const unsigned long KEY_F9 = 0x1'0000'000Elu;
        inline constexpr const unsigned long KEY_F10 = 0x1'0000'000Flu;
        inline constexpr const unsigned long KEY_F11 = 0x1'0000'0010lu;
        inline constexpr const unsigned long KEY_F12 = 0x1'0000'0011lu;
        inline constexpr const unsigned long KEY_PAGE_UP = 0x1'0000'0012lu;
        inline constexpr const unsigned long KEY_PAGE_DOWN = 0x1'0000'0013lu;
        inline constexpr const unsigned long KEY_HOME = 0x1'0000'0014lu;
        inline constexpr const unsigned long KEY_END = 0x1'0000'0015lu;
        // key modifiers
        inline constexpr const unsigned long KEY_CTRL = 0x2'0000'0000lu;
        inline constexpr const unsigned long KEY_SHIFT = 0x4'0000'0000lu;
        inline constexpr const unsigned long KEY_ALT = 0x8'0000'0000lu;
    }

    void enterAlternativeTerminal();
    void leaveAlternativeTerminal();
    IntVector2 getTerminalSize();
    void clearTerminal();
    void clearTerminalLine();

    void hideCursor();
    void showCursor();
    void resetCursor();
    void moveCursorLeft(int i);
    void moveCursorRight(int i);
    void moveCursorUp(int i);
    void moveCursorDown(int i);

    bool enterRawTerminal();
    bool leaveRawTerminal();
    u64 getRawChar();
    bool isSpecialChar(u64 u);

    struct SpecialChar {
        u64 key = 0;
        bool control = 0;
        bool shift = 0;
        bool alt = 0;
    };

    SpecialChar convertToSpecialChar(u64 u);
}