module raylib
   use iso_c_binding
   implicit none

   type, bind(c) :: vector2
      real(c_float) :: x
      real(c_float) :: y
   end type

   type, bind(c) :: vector3
      real(c_float) :: x
      real(c_float) :: y
      real(c_float) :: z
   end type

   type, bind(c) :: color
      integer(c_int8_t) :: r
      integer(c_int8_t) :: g
      integer(c_int8_t) :: b
      integer(c_int8_t) :: a
   end type

   type(color) :: LIGHTGRAY = color(200, 200, 200, 255)
   type(color) :: GRAY = color(130, 130, 130, 255)
   type(color) :: DARKGRAY = color(80, 80, 80, 255)
   type(color) :: YELLOW = color(253, 249, 0, 255)
   type(color) :: GOLD = color(255, 203, 0, 255)
   type(color) :: ORANGE = color(255, 161, 0, 255)
   type(color) :: PINK = color(255, 109, 194, 255)
   type(color) :: RED = color(230, 41, 55, 255)
   type(color) :: MAROON = color(190, 33, 55, 255)
   type(color) :: GREEN = color(0, 228, 48, 255)
   type(color) :: LIME = color(0, 158, 47, 255)
   type(color) :: DARKGREEN = color(0, 117, 44, 255)
   type(color) :: SKYBLUE = color(102, 191, 255, 255)
   type(color) :: BLUE = color(0, 121, 241, 255)
   type(color) :: DARKBLUE = color(0, 82, 172, 255)
   type(color) :: PURPLE = color(200, 122, 255, 255)
   type(color) :: VIOLET = color(135, 60, 190, 255)
   type(color) :: DARKPURPLE = color(112, 31, 126, 255)
   type(color) :: BEIGE = color(211, 176, 131, 255)
   type(color) :: BROWN = color(127, 106, 79, 255)
   type(color) :: DARKBROWN = color(76, 63, 47, 255)
   type(color) :: WHITE = color(255, 255, 255, 255)
   type(color) :: BLACK = color(0, 0, 0, 255)
   type(color) :: BLANK = color(0, 0, 0, 0)
   type(color) :: MAGENTA = color(255, 0, 255, 255)
   type(color) :: RAYWHITE = color(245, 245, 245, 255)

   type, bind(c) :: camera3d
      type(vector3) :: position
      type(vector3) :: target
      type(vector3) :: up
      real(c_float) :: fovy
      integer(c_int) :: projection
   end type

!Camera system modes
   integer(c_int) :: CAMERA_CUSTOM = 0
   integer(c_int) :: CAMERA_FREE = 1
   integer(c_int) :: CAMERA_ORBITAL = 2
   integer(c_int) :: CAMERA_FIRST_PERSON = 3
   integer(c_int) :: CAMERA_THIRD_PERSON = 4

!Camera projection
   integer(c_int) :: CAMERA_PERSPECTIVE = 0
   integer(c_int) :: CAMERA_ORTHOGRAPHIC = 1

   interface

      subroutine init_window(width, height, title) bind(c, name="InitWindow")
         import :: c_char
         import :: c_int
         integer(c_int), intent(in), value :: width
         integer(c_int), intent(in), value :: height
         character(c_char), dimension(*), intent(in) :: title
      end subroutine

      function window_should_close() result(res) bind(c, name="WindowShouldClose")
         import :: c_bool
         logical(c_bool) :: res
      end function

      subroutine close_window() bind(c, name="CloseWindow")
      end subroutine

      subroutine clear_background(col) bind(c, name="ClearBackground")
         import :: color
         Type(color), intent(in), value :: col
      end subroutine

      subroutine begin_drawing() bind(c, name="BeginDrawing")
      end subroutine

      subroutine end_drawing() bind(c, name="EndDrawing")
      end subroutine

      subroutine begin_mode_3d(camera) bind(c, name="BeginMode3D")
         import :: camera3d
         type(camera3d), intent(in), value :: camera
      end subroutine

      subroutine end_mode_3d() bind(c, name="EndMode3D")
      end subroutine

      subroutine set_target_fps(fps) bind(c, name="SetTargetFPS")
         import :: c_int
         integer(c_int), intent(in), value :: fps
      end subroutine

      subroutine update_camera(camera_ptr, mode) bind(c, name="UpdateCamera")
         import :: c_ptr, c_int
         type(c_ptr) :: camera_ptr
         integer(c_int):: mode
      end subroutine update_camera

      subroutine show_cursor() bind(c, name="ShowCursor")
      end subroutine show_cursor

      subroutine hide_cursor() bind(c, name="HideCursor")
      end subroutine hide_cursor

      subroutine EnableCursor() bind(c, name="EnableCursor")
      end subroutine EnableCursor

      subroutine disable_cursor() bind(c, name="DisableCursor")
      end subroutine disable_cursor

      subroutine draw_text(text, posX, posY, fontSize, col) bind(c, name="DrawText")
         import :: c_int
         import :: color
         import :: c_char
         character(c_char), dimension(*), intent(in) :: text
         integer(c_int), intent(in), value :: posX
         integer(c_int), intent(in), value :: posY
         integer(c_int), intent(in), value :: fontSize
         type(color), intent(in), value :: col
      end subroutine draw_text

      subroutine draw_cube(position, width, height, length, col) bind(c, name="DrawCube")
         import :: vector3
         import :: c_float
         import :: color
         type(vector3), intent(in), value :: position
         real(c_float), intent(in), value :: width
         real(c_float), intent(in), value :: height
         real(c_float), intent(in), value :: length
         type(color), intent(in), value :: col
      end subroutine draw_cube

      subroutine draw_cube_wires(position, width, height, length, col) bind(c, name="DrawCubeWires")
         import :: vector3
         import :: c_float
         import :: color
         type(vector3), intent(in), value :: position
         real(c_float), intent(in), value :: width
         real(c_float), intent(in), value :: height
         real(c_float), intent(in), value :: length
         type(color), intent(in), value :: col
      end subroutine draw_cube_wires

      subroutine draw_plane(centerPos, size, col) bind(c, name="DrawPlane")
         import vector3
         import vector2
         import color
         type(vector3), intent(in), value :: centerPos
         type(vector2), intent(in), value :: size
         type(color), intent(in), value  :: col
      end subroutine draw_plane
   end interface
end module