/*
    * Syscall.hpp
    * ZenithOS syscall definitions for userspace programs
    * Copyright (c) 2025 Daniel Hammer
*/

#pragma once
#include <cstdint>
#include <cstddef>

namespace Zenith {

    // Syscall numbers
    static constexpr uint64_t SYS_EXIT            = 0;
    static constexpr uint64_t SYS_YIELD           = 1;
    static constexpr uint64_t SYS_SLEEP_MS        = 2;
    static constexpr uint64_t SYS_GETPID          = 3;
    static constexpr uint64_t SYS_PRINT           = 4;
    static constexpr uint64_t SYS_PUTCHAR          = 5;
    static constexpr uint64_t SYS_OPEN            = 6;
    static constexpr uint64_t SYS_READ            = 7;
    static constexpr uint64_t SYS_GETSIZE         = 8;
    static constexpr uint64_t SYS_CLOSE           = 9;
    static constexpr uint64_t SYS_READDIR         = 10;
    static constexpr uint64_t SYS_ALLOC           = 11;
    static constexpr uint64_t SYS_FREE            = 12;
    static constexpr uint64_t SYS_GETTICKS        = 13;
    static constexpr uint64_t SYS_GETMILLISECONDS = 14;
    static constexpr uint64_t SYS_GETINFO         = 15;
    static constexpr uint64_t SYS_ISKEYAVAILABLE  = 16;
    static constexpr uint64_t SYS_GETKEY          = 17;
    static constexpr uint64_t SYS_GETCHAR         = 18;
    static constexpr uint64_t SYS_PING            = 19;
    static constexpr uint64_t SYS_SPAWN           = 20;
    static constexpr uint64_t SYS_FBINFO          = 21;
    static constexpr uint64_t SYS_FBMAP           = 22;
    static constexpr uint64_t SYS_WAITPID         = 23;
    static constexpr uint64_t SYS_TERMSIZE        = 24;
    static constexpr uint64_t SYS_GETARGS         = 25;
    static constexpr uint64_t SYS_RESET           = 26;
    static constexpr uint64_t SYS_SHUTDOWN        = 27;

    struct FbInfo {
        uint64_t width;
        uint64_t height;
        uint64_t pitch;      // bytes per scanline
        uint64_t bpp;        // bits per pixel (32)
        uint64_t userAddr;   // filled by SYS_FBMAP (0 until mapped)
    };

    struct SysInfo {
        char osName[32];
        char osVersion[32];
        uint32_t    apiVersion;
        uint32_t    maxProcesses;
    };

    struct KeyEvent {
        uint8_t scancode;
        char    ascii;
        bool    pressed;
        bool    shift;
        bool    ctrl;
        bool    alt;
    };

}