use num_enum::{TryFromPrimitive, IntoPrimitive};

use super::ffi::*;

// NB: commented-out stuff is from newer versions of libretro.h not yet represented in libretro-sys

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum DeviceType {
    None = DEVICE_NONE,
    Joypad = DEVICE_JOYPAD,
    Mouse = DEVICE_MOUSE,
    Keyboard = DEVICE_KEYBOARD,
    LightGun = DEVICE_LIGHTGUN,
    Analog = DEVICE_ANALOG,
    Pointer = DEVICE_POINTER,
}

impl DeviceType {
    // would be const fn, but const u32::from isn't stable
    pub fn device_subclass(&self, id: u32) -> u32 {
        ((id + 1) << DEVICE_TYPE_SHIFT) | u32::from(*self)
    }
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum InputIndex {
    Left = DEVICE_INDEX_ANALOG_LEFT,
    Right = DEVICE_INDEX_ANALOG_RIGHT,
    // Button = DEVICE_INDEX_ANALOG_BUTTON,
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum JoypadButton {
    B = DEVICE_ID_JOYPAD_B,
    Y = DEVICE_ID_JOYPAD_Y,
    Select = DEVICE_ID_JOYPAD_SELECT,
    Start = DEVICE_ID_JOYPAD_START,
    Up = DEVICE_ID_JOYPAD_UP,
    Down = DEVICE_ID_JOYPAD_DOWN,
    Left = DEVICE_ID_JOYPAD_LEFT,
    Right = DEVICE_ID_JOYPAD_RIGHT,
    A = DEVICE_ID_JOYPAD_A,
    X = DEVICE_ID_JOYPAD_X,
    L = DEVICE_ID_JOYPAD_L,
    R = DEVICE_ID_JOYPAD_R,
    L2 = DEVICE_ID_JOYPAD_L2,
    R2 = DEVICE_ID_JOYPAD_R2,
    L3 = DEVICE_ID_JOYPAD_L3,
    R3 = DEVICE_ID_JOYPAD_R3,
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum AnalogAxis {
    X = DEVICE_ID_ANALOG_X,
    Y = DEVICE_ID_ANALOG_Y,
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum MouseButton {
    X = DEVICE_ID_MOUSE_X,
    Y = DEVICE_ID_MOUSE_Y,
    Left = DEVICE_ID_MOUSE_LEFT,
    Right = DEVICE_ID_MOUSE_RIGHT,
    WheelUp = DEVICE_ID_MOUSE_WHEELUP,
    WheelDown = DEVICE_ID_MOUSE_WHEELDOWN,
    Middle = DEVICE_ID_MOUSE_MIDDLE,
    HorizWheelUp = DEVICE_ID_MOUSE_HORIZ_WHEELUP,
    HorizWheelDown = DEVICE_ID_MOUSE_HORIZ_WHEELDOWN,
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum LightGunButton {
    // ScreenX = DEVICE_ID_LIGHTGUN_SCREEN_X,
    // ScreenY = DEVICE_ID_LIGHTGUN_SCREEN_Y,
    // IsOffscreen = DEVICE_ID_LIGHTGUN_IS_OFFSCREEN,
    Trigger = DEVICE_ID_LIGHTGUN_TRIGGER,
    // Reload = DEVICE_ID_LIGHTGUN_RELOAD,
    Start = DEVICE_ID_LIGHTGUN_START,
    // Select = DEVICE_ID_LIGHTGUN_SELECT,
    // AuxC = DEVICE_ID_LIGHTGUN_AUX_C,
    // DpadUp = DEVICE_ID_LIGHTGUN_DPAD_UP,
    // DpadDown = DEVICE_ID_LIGHTGUN_DPAD_DOWN,
    // DpadLeft = DEVICE_ID_LIGHTGUN_DPAD_LEFT,
    // DpadRight = DEVICE_ID_LIGHTGUN_DPAD_RIGHT,
    X = DEVICE_ID_LIGHTGUN_X,
    Y = DEVICE_ID_LIGHTGUN_Y,
    Cursor = DEVICE_ID_LIGHTGUN_CURSOR,
    Turbo = DEVICE_ID_LIGHTGUN_TURBO,
    Pause = DEVICE_ID_LIGHTGUN_PAUSE,
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum PointerStat {
    X = DEVICE_ID_POINTER_X,
    Y = DEVICE_ID_POINTER_Y,
    Pressed = DEVICE_ID_POINTER_PRESSED,
}

#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum EnvRotation {
    None = 0,
    CounterClockwise90 = 1,
    CounterClockwise180 = 2,
    CounterClockwise270 = 3,
}

// TODO: experimental calls
#[derive(TryFromPrimitive, IntoPrimitive, Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u32)]
pub enum EnvCmd {
    SetRotation = ENVIRONMENT_SET_ROTATION,
    GetOverscan = ENVIRONMENT_GET_OVERSCAN,
    GetCanDupe = ENVIRONMENT_GET_CAN_DUPE,
    SetMessage = ENVIRONMENT_SET_MESSAGE,
    Shutdown = ENVIRONMENT_SHUTDOWN,
    SetPerformanceLevel = ENVIRONMENT_SET_PERFORMANCE_LEVEL,
    GetSystemDirectory = ENVIRONMENT_GET_SYSTEM_DIRECTORY,
    SetPixelFormat = ENVIRONMENT_SET_PIXEL_FORMAT,
    SetInputDescriptors = ENVIRONMENT_SET_INPUT_DESCRIPTORS,
    SetKeyboardCallback = ENVIRONMENT_SET_KEYBOARD_CALLBACK,
    SetDiskControlInterface = ENVIRONMENT_SET_DISK_CONTROL_INTERFACE,
    SetHwRender = ENVIRONMENT_SET_HW_RENDER,
    GetVariable = ENVIRONMENT_GET_VARIABLE,
    SetVariables = ENVIRONMENT_SET_VARIABLES,
    GetVariableUpdate = ENVIRONMENT_GET_VARIABLE_UPDATE,
    SetSupportNoGame = ENVIRONMENT_SET_SUPPORT_NO_GAME,
    GetLibretroPath = ENVIRONMENT_GET_LIBRETRO_PATH,
    SetFrameTimeCallback = ENVIRONMENT_SET_FRAME_TIME_CALLBACK,
    SetAudioCallback = ENVIRONMENT_SET_AUDIO_CALLBACK,
    GetRumbleInterface = ENVIRONMENT_GET_RUMBLE_INTERFACE,
    GetInputDeviceCapabilities = ENVIRONMENT_GET_INPUT_DEVICE_CAPABILITIES,
    GetSensorInterface = ENVIRONMENT_GET_SENSOR_INTERFACE,
    GetCameraInterface = ENVIRONMENT_GET_CAMERA_INTERFACE,
    GetLogInterface = ENVIRONMENT_GET_LOG_INTERFACE,
    GetPerfInterface = ENVIRONMENT_GET_PERF_INTERFACE,
    GetLocationInterface = ENVIRONMENT_GET_LOCATION_INTERFACE,
    GetCoreAssetsDirectory = ENVIRONMENT_GET_CORE_ASSETS_DIRECTORY,
    GetSaveDirectory = ENVIRONMENT_GET_SAVE_DIRECTORY,
    SetSystemAvInfo = ENVIRONMENT_SET_SYSTEM_AV_INFO,
    SetProcAddressCallback = ENVIRONMENT_SET_PROC_ADDRESS_CALLBACK,
    SetSubsystemInfo = ENVIRONMENT_SET_SUBSYSTEM_INFO,
    SetControllerInfo = ENVIRONMENT_SET_CONTROLLER_INFO,
    SetMemoryMaps = ENVIRONMENT_SET_MEMORY_MAPS,
    SetGeometry = ENVIRONMENT_SET_GEOMETRY,
    GetUsername = ENVIRONMENT_GET_USERNAME,
    GetLanguage = ENVIRONMENT_GET_LANGUAGE,
    // SetSerializationQuirks = ENVIRONMENT_SET_SERIALIZATION_QUIRKS,
}