module Termbox.Bindings.C
  ( -- * Functions

    -- ** Initialize / shutdown
    tb_init,
    tb_init_fd,
    tb_init_file,
    tb_shutdown,

    -- ** Get\/set input\/output mode
    tb_select_input_mode,
    tb_select_output_mode,

    -- ** Get terminal dimensions
    tb_width,
    tb_height,

    -- ** Poll for events
    tb_peek_event,
    tb_poll_event,

    -- ** Set a cell
    tb_set_cursor,
    tb_put_cell,
    tb_change_cell,
    tb_cell_buffer,

    -- ** Clear and synchronize the back buffer
    tb_clear,
    tb_set_clear_attributes,
    tb_present,

    -- * Objects
    Tb_cell (..),
    Tb_event (..),

    -- * Constants

    -- ** Keys
    _TB_KEY_ARROW_DOWN,
    _TB_KEY_ARROW_LEFT,
    _TB_KEY_ARROW_RIGHT,
    _TB_KEY_ARROW_UP,
    _TB_KEY_BACKSPACE,
    _TB_KEY_BACKSPACE2,
    _TB_KEY_CTRL_2,
    _TB_KEY_CTRL_3,
    _TB_KEY_CTRL_4,
    _TB_KEY_CTRL_5,
    _TB_KEY_CTRL_6,
    _TB_KEY_CTRL_7,
    _TB_KEY_CTRL_8,
    _TB_KEY_CTRL_A,
    _TB_KEY_CTRL_B,
    _TB_KEY_CTRL_BACKSLASH,
    _TB_KEY_CTRL_C,
    _TB_KEY_CTRL_D,
    _TB_KEY_CTRL_E,
    _TB_KEY_CTRL_F,
    _TB_KEY_CTRL_G,
    _TB_KEY_CTRL_H,
    _TB_KEY_CTRL_I,
    _TB_KEY_CTRL_J,
    _TB_KEY_CTRL_K,
    _TB_KEY_CTRL_L,
    _TB_KEY_CTRL_LSQ_BRACKET,
    _TB_KEY_CTRL_M,
    _TB_KEY_CTRL_N,
    _TB_KEY_CTRL_O,
    _TB_KEY_CTRL_P,
    _TB_KEY_CTRL_Q,
    _TB_KEY_CTRL_R,
    _TB_KEY_CTRL_RSQ_BRACKET,
    _TB_KEY_CTRL_S,
    _TB_KEY_CTRL_SLASH,
    _TB_KEY_CTRL_T,
    _TB_KEY_CTRL_TILDE,
    _TB_KEY_CTRL_U,
    _TB_KEY_CTRL_UNDERSCORE,
    _TB_KEY_CTRL_V,
    _TB_KEY_CTRL_W,
    _TB_KEY_CTRL_X,
    _TB_KEY_CTRL_Y,
    _TB_KEY_CTRL_Z,
    _TB_KEY_DELETE,
    _TB_KEY_END,
    _TB_KEY_ENTER,
    _TB_KEY_ESC,
    _TB_KEY_F1,
    _TB_KEY_F10,
    _TB_KEY_F11,
    _TB_KEY_F12,
    _TB_KEY_F2,
    _TB_KEY_F3,
    _TB_KEY_F4,
    _TB_KEY_F5,
    _TB_KEY_F6,
    _TB_KEY_F7,
    _TB_KEY_F8,
    _TB_KEY_F9,
    _TB_KEY_HOME,
    _TB_KEY_INSERT,
    _TB_KEY_MOUSE_LEFT,
    _TB_KEY_MOUSE_MIDDLE,
    _TB_KEY_MOUSE_RELEASE,
    _TB_KEY_MOUSE_RIGHT,
    _TB_KEY_MOUSE_WHEEL_DOWN,
    _TB_KEY_MOUSE_WHEEL_UP,
    _TB_KEY_PGDN,
    _TB_KEY_PGUP,
    _TB_KEY_SPACE,
    _TB_KEY_TAB,

    -- ** Alt modifiers
    _TB_MOD_ALT,
    _TB_MOD_MOTION,

    -- ** Colors
    _TB_DEFAULT,
    _TB_BLACK,
    _TB_BLUE,
    _TB_CYAN,
    _TB_GREEN,
    _TB_MAGENTA,
    _TB_RED,
    _TB_WHITE,
    _TB_YELLOW,

    -- ** Attributes
    _TB_BOLD,
    _TB_REVERSE,
    _TB_UNDERLINE,

    -- ** Event types
    _TB_EVENT_KEY,
    _TB_EVENT_MOUSE,
    _TB_EVENT_RESIZE,

    -- ** 'tb_init' error codes
    _TB_EFAILED_TO_OPEN_TTY,
    _TB_EPIPE_TRAP_ERROR,
    _TB_EUNSUPPORTED_TERMINAL,

    -- ** Hide cursor
    _TB_HIDE_CURSOR,

    -- ** Input modes
    _TB_INPUT_CURRENT,
    _TB_INPUT_ALT,
    _TB_INPUT_ESC,
    _TB_INPUT_MOUSE,

    -- ** Output modes
    _TB_OUTPUT_CURRENT,
    _TB_OUTPUT_216,
    _TB_OUTPUT_256,
    _TB_OUTPUT_GRAYSCALE,
    _TB_OUTPUT_NORMAL,
  )
where

import Data.Int (Int32)
import Data.Word (Word16, Word32, Word8)
import Foreign.C.String (CString)
import Foreign.C.Types (CInt (CInt))
import Foreign.Ptr (Ptr)
import Foreign.Storable (Storable)
import qualified Foreign.Storable as Storable
import GHC.Generics (Generic)
import Prelude hiding (mod)

------------------------------------------------------------------------------------------------------------------------
-- Functions

-- | Get a pointer to the back buffer.
foreign import capi unsafe "termbox.h tb_cell_buffer"
  tb_cell_buffer :: IO (Ptr Tb_cell)

-- | Set a cell value in the back buffer.
foreign import capi unsafe "termbox.h tb_change_cell"
  tb_change_cell ::
    -- | x
    CInt ->
    -- | y
    CInt ->
    -- | ch
    Word32 ->
    -- | fg
    Word16 ->
    -- | bg
    Word16 ->
    IO ()

-- | Clear the back buffer.
foreign import capi unsafe "termbox.h tb_clear"
  tb_clear :: IO ()

-- | Get the terminal height.
foreign import capi unsafe "termbox.h tb_height"
  tb_height :: IO CInt

-- | Initialize the @termbox@ library.
foreign import capi unsafe "termbox.h tb_init"
  tb_init :: IO CInt

-- | Initialize the @termbox@ library.
--
-- > tb_init = tb_init_file("/dev/tty")
foreign import capi unsafe "termbox.h tb_init_file"
  tb_init_file :: CString -> IO CInt

-- | Initialize the @termbox@ library.
--
-- > tb_init = tb_init_fd(0)
foreign import capi unsafe "termbox.h tb_init_fd"
  tb_init_fd :: CInt -> IO CInt

-- | Wait up to a number of milliseconds for an event.
foreign import capi interruptible "termbox.h tb_peek_event"
  tb_peek_event :: Ptr Tb_event -> CInt -> IO CInt

-- | Wait for an event.
foreign import capi interruptible "termbox.h tb_poll_event"
  tb_poll_event :: Ptr Tb_event -> IO CInt

-- | Synchronize the back buffer with the terminal.
foreign import capi unsafe "termbox.h tb_present"
  tb_present :: IO ()

-- | Set a cell value in the back buffer.
foreign import capi unsafe "termbox.h tb_put_cell"
  tb_put_cell ::
    -- | x
    CInt ->
    -- | y
    CInt ->
    -- | cell
    Ptr Tb_cell ->
    IO ()

-- | Get\/set the input mode.
foreign import capi unsafe "termbox.h tb_select_input_mode"
  tb_select_input_mode :: CInt -> IO CInt

-- | Get\/set the output mode.
foreign import capi unsafe "termbox.h tb_select_output_mode"
  tb_select_output_mode :: CInt -> IO CInt

-- | Set the foreground and background attributes that 'tb_clear' clears the back buffer with.
foreign import capi unsafe "termbox.h tb_set_clear_attributes"
  tb_set_clear_attributes ::
    -- | fg
    Word16 ->
    -- | bg
    Word16 ->
    IO ()

-- | Set the cursor location, or hide it.
foreign import capi unsafe "termbox.h tb_set_cursor"
  tb_set_cursor ::
    -- | x
    CInt ->
    -- | y
    CInt ->
    IO ()

-- | Shutdown the @termbox@ library.
foreign import capi unsafe "termbox.h tb_shutdown"
  tb_shutdown :: IO ()

-- | Get the terminal width.
foreign import capi unsafe "termbox.h tb_width"
  tb_width :: IO CInt

------------------------------------------------------------------------------------------------------------------------
-- Objects

-- | A cell.
data Tb_cell = Tb_cell
  { -- | A unicode character.
    ch :: {-# UNPACK #-} !Word32,
    -- | Foreground attribute.
    fg :: {-# UNPACK #-} !Word16,
    -- | Background attribute.
    bg :: {-# UNPACK #-} !Word16
  }
  deriving stock (Eq, Generic, Ord, Show)

instance Storable Tb_cell where
  sizeOf :: Tb_cell -> Int
  sizeOf _ =
    8

  alignment :: Tb_cell -> Int
  alignment _ =
    4

  peek :: Ptr Tb_cell -> IO Tb_cell
  peek ptr =
    Tb_cell
      <$> Storable.peekByteOff ptr 0
      <*> Storable.peekByteOff ptr 4
      <*> Storable.peekByteOff ptr 6

  poke :: Ptr Tb_cell -> Tb_cell -> IO ()
  poke ptr Tb_cell {ch, fg, bg} = do
    Storable.pokeByteOff ptr 0 ch
    Storable.pokeByteOff ptr 4 fg
    Storable.pokeByteOff ptr 6 bg

-- | An event.
data Tb_event = Tb_event
  { type_ :: {-# UNPACK #-} !Word8,
    mod :: {-# UNPACK #-} !Word8,
    key :: {-# UNPACK #-} !Word16,
    ch :: {-# UNPACK #-} !Word32,
    w :: {-# UNPACK #-} !Int32,
    h :: {-# UNPACK #-} !Int32,
    x :: {-# UNPACK #-} !Int32,
    y :: {-# UNPACK #-} !Int32
  }
  deriving stock (Eq, Generic, Ord, Show)

instance Storable Tb_event where
  sizeOf :: Tb_event -> Int
  sizeOf _ =
    24

  alignment :: Tb_event -> Int
  alignment _ =
    4

  peek :: Ptr Tb_event -> IO Tb_event
  peek ptr =
    Tb_event
      <$> Storable.peekByteOff ptr 0
      <*> Storable.peekByteOff ptr 1
      <*> Storable.peekByteOff ptr 2
      <*> Storable.peekByteOff ptr 4
      <*> Storable.peekByteOff ptr 8
      <*> Storable.peekByteOff ptr 12
      <*> Storable.peekByteOff ptr 16
      <*> Storable.peekByteOff ptr 20

  poke :: Ptr Tb_event -> Tb_event -> IO ()
  poke ptr Tb_event {type_, mod, key, ch, w, h, x, y} = do
    Storable.pokeByteOff ptr 0 type_
    Storable.pokeByteOff ptr 1 mod
    Storable.pokeByteOff ptr 2 key
    Storable.pokeByteOff ptr 4 ch
    Storable.pokeByteOff ptr 8 w
    Storable.pokeByteOff ptr 12 h
    Storable.pokeByteOff ptr 16 x
    Storable.pokeByteOff ptr 20 y

------------------------------------------------------------------------------------------------------------------------
-- Constants

foreign import capi "termbox.h value TB_BLACK" _TB_BLACK :: Word16

foreign import capi "termbox.h value TB_BLUE" _TB_BLUE :: Word16

foreign import capi "termbox.h value TB_BOLD" _TB_BOLD :: Word16

foreign import capi "termbox.h value TB_CYAN" _TB_CYAN :: Word16

foreign import capi "termbox.h value TB_DEFAULT" _TB_DEFAULT :: Word16

foreign import capi "termbox.h value TB_EFAILED_TO_OPEN_TTY" _TB_EFAILED_TO_OPEN_TTY :: CInt

foreign import capi "termbox.h value TB_EPIPE_TRAP_ERROR" _TB_EPIPE_TRAP_ERROR :: CInt

foreign import capi "termbox.h value TB_EUNSUPPORTED_TERMINAL" _TB_EUNSUPPORTED_TERMINAL :: CInt

foreign import capi "termbox.h value TB_EVENT_KEY" _TB_EVENT_KEY :: Word8

foreign import capi "termbox.h value TB_EVENT_MOUSE" _TB_EVENT_MOUSE :: Word8

foreign import capi "termbox.h value TB_EVENT_RESIZE" _TB_EVENT_RESIZE :: Word8

foreign import capi "termbox.h value TB_GREEN" _TB_GREEN :: Word16

foreign import capi "termbox.h value TB_HIDE_CURSOR" _TB_HIDE_CURSOR :: CInt

foreign import capi "termbox.h value TB_INPUT_ALT" _TB_INPUT_ALT :: CInt

foreign import capi "termbox.h value TB_INPUT_CURRENT" _TB_INPUT_CURRENT :: CInt

foreign import capi "termbox.h value TB_INPUT_ESC" _TB_INPUT_ESC :: CInt

foreign import capi "termbox.h value TB_INPUT_MOUSE" _TB_INPUT_MOUSE :: CInt

foreign import capi "termbox.h value TB_KEY_ARROW_DOWN" _TB_KEY_ARROW_DOWN :: Word16

foreign import capi "termbox.h value TB_KEY_ARROW_LEFT" _TB_KEY_ARROW_LEFT :: Word16

foreign import capi "termbox.h value TB_KEY_ARROW_RIGHT" _TB_KEY_ARROW_RIGHT :: Word16

foreign import capi "termbox.h value TB_KEY_ARROW_UP" _TB_KEY_ARROW_UP :: Word16

foreign import capi "termbox.h value TB_KEY_BACKSPACE" _TB_KEY_BACKSPACE :: Word16

foreign import capi "termbox.h value TB_KEY_BACKSPACE2" _TB_KEY_BACKSPACE2 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_2" _TB_KEY_CTRL_2 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_3" _TB_KEY_CTRL_3 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_4" _TB_KEY_CTRL_4 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_5" _TB_KEY_CTRL_5 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_6" _TB_KEY_CTRL_6 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_7" _TB_KEY_CTRL_7 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_8" _TB_KEY_CTRL_8 :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_A" _TB_KEY_CTRL_A :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_B" _TB_KEY_CTRL_B :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_BACKSLASH" _TB_KEY_CTRL_BACKSLASH :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_C" _TB_KEY_CTRL_C :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_D" _TB_KEY_CTRL_D :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_E" _TB_KEY_CTRL_E :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_F" _TB_KEY_CTRL_F :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_G" _TB_KEY_CTRL_G :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_H" _TB_KEY_CTRL_H :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_I" _TB_KEY_CTRL_I :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_J" _TB_KEY_CTRL_J :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_K" _TB_KEY_CTRL_K :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_L" _TB_KEY_CTRL_L :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_LSQ_BRACKET" _TB_KEY_CTRL_LSQ_BRACKET :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_M" _TB_KEY_CTRL_M :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_N" _TB_KEY_CTRL_N :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_O" _TB_KEY_CTRL_O :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_P" _TB_KEY_CTRL_P :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_Q" _TB_KEY_CTRL_Q :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_R" _TB_KEY_CTRL_R :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_RSQ_BRACKET" _TB_KEY_CTRL_RSQ_BRACKET :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_S" _TB_KEY_CTRL_S :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_SLASH" _TB_KEY_CTRL_SLASH :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_T" _TB_KEY_CTRL_T :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_TILDE" _TB_KEY_CTRL_TILDE :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_U" _TB_KEY_CTRL_U :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_UNDERSCORE" _TB_KEY_CTRL_UNDERSCORE :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_V" _TB_KEY_CTRL_V :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_W" _TB_KEY_CTRL_W :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_X" _TB_KEY_CTRL_X :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_Y" _TB_KEY_CTRL_Y :: Word16

foreign import capi "termbox.h value TB_KEY_CTRL_Z" _TB_KEY_CTRL_Z :: Word16

foreign import capi "termbox.h value TB_KEY_DELETE" _TB_KEY_DELETE :: Word16

foreign import capi "termbox.h value TB_KEY_END" _TB_KEY_END :: Word16

foreign import capi "termbox.h value TB_KEY_ENTER" _TB_KEY_ENTER :: Word16

foreign import capi "termbox.h value TB_KEY_ESC" _TB_KEY_ESC :: Word16

foreign import capi "termbox.h value TB_KEY_F1" _TB_KEY_F1 :: Word16

foreign import capi "termbox.h value TB_KEY_F10" _TB_KEY_F10 :: Word16

foreign import capi "termbox.h value TB_KEY_F11" _TB_KEY_F11 :: Word16

foreign import capi "termbox.h value TB_KEY_F12" _TB_KEY_F12 :: Word16

foreign import capi "termbox.h value TB_KEY_F2" _TB_KEY_F2 :: Word16

foreign import capi "termbox.h value TB_KEY_F3" _TB_KEY_F3 :: Word16

foreign import capi "termbox.h value TB_KEY_F4" _TB_KEY_F4 :: Word16

foreign import capi "termbox.h value TB_KEY_F5" _TB_KEY_F5 :: Word16

foreign import capi "termbox.h value TB_KEY_F6" _TB_KEY_F6 :: Word16

foreign import capi "termbox.h value TB_KEY_F7" _TB_KEY_F7 :: Word16

foreign import capi "termbox.h value TB_KEY_F8" _TB_KEY_F8 :: Word16

foreign import capi "termbox.h value TB_KEY_F9" _TB_KEY_F9 :: Word16

foreign import capi "termbox.h value TB_KEY_HOME" _TB_KEY_HOME :: Word16

foreign import capi "termbox.h value TB_KEY_INSERT" _TB_KEY_INSERT :: Word16

foreign import capi "termbox.h value TB_KEY_MOUSE_LEFT" _TB_KEY_MOUSE_LEFT :: Word16

foreign import capi "termbox.h value TB_KEY_MOUSE_MIDDLE" _TB_KEY_MOUSE_MIDDLE :: Word16

foreign import capi "termbox.h value TB_KEY_MOUSE_RELEASE" _TB_KEY_MOUSE_RELEASE :: Word16

foreign import capi "termbox.h value TB_KEY_MOUSE_RIGHT" _TB_KEY_MOUSE_RIGHT :: Word16

foreign import capi "termbox.h value TB_KEY_MOUSE_WHEEL_DOWN" _TB_KEY_MOUSE_WHEEL_DOWN :: Word16

foreign import capi "termbox.h value TB_KEY_MOUSE_WHEEL_UP" _TB_KEY_MOUSE_WHEEL_UP :: Word16

foreign import capi "termbox.h value TB_KEY_PGDN" _TB_KEY_PGDN :: Word16

foreign import capi "termbox.h value TB_KEY_PGUP" _TB_KEY_PGUP :: Word16

foreign import capi "termbox.h value TB_KEY_SPACE" _TB_KEY_SPACE :: Word16

foreign import capi "termbox.h value TB_KEY_TAB" _TB_KEY_TAB :: Word16

foreign import capi "termbox.h value TB_MAGENTA" _TB_MAGENTA :: Word16

foreign import capi "termbox.h value TB_MOD_ALT" _TB_MOD_ALT :: Word8

foreign import capi "termbox.h value TB_MOD_MOTION" _TB_MOD_MOTION :: Word8

foreign import capi "termbox.h value TB_OUTPUT_216" _TB_OUTPUT_216 :: CInt

foreign import capi "termbox.h value TB_OUTPUT_256" _TB_OUTPUT_256 :: CInt

foreign import capi "termbox.h value TB_OUTPUT_CURRENT" _TB_OUTPUT_CURRENT :: CInt

foreign import capi "termbox.h value TB_OUTPUT_GRAYSCALE" _TB_OUTPUT_GRAYSCALE :: CInt

foreign import capi "termbox.h value TB_OUTPUT_NORMAL" _TB_OUTPUT_NORMAL :: CInt

foreign import capi "termbox.h value TB_RED" _TB_RED :: Word16

foreign import capi "termbox.h value TB_REVERSE" _TB_REVERSE :: Word16

foreign import capi "termbox.h value TB_UNDERLINE" _TB_UNDERLINE :: Word16

foreign import capi "termbox.h value TB_WHITE" _TB_WHITE :: Word16

foreign import capi "termbox.h value TB_YELLOW" _TB_YELLOW :: Word16