package game

import (
	"fmt"

	"github.com/veandco/go-sdl2/sdl"
)

/*
NOTE: We're using the SDL with goroutines example.
Every call to an SDL function must be passed through the sdl.Do() function so that it joins the queue of thread-sensitive calls.
You'll see this a lot below, but basically every SDL function must do something like this:
	sdl.Do(func() {
		err = sdl.SomeFunction()
	})
This is for thread safety because SDL is not intended to be thread-safe.
However, the rest of the code can do whatever it wants with threads so long as the SDL calls all use this method.
*/

const (
	SDL_INIT_FLAGS uint32 = sdl.INIT_TIMER | sdl.INIT_AUDIO | sdl.INIT_VIDEO | sdl.INIT_EVENTS | sdl.INIT_JOYSTICK | sdl.INIT_HAPTIC | sdl.INIT_GAMECONTROLLER // ignore sensor subsystem

	SDL_WINDOW_FLAGS            uint32 = sdl.WINDOW_SHOWN | sdl.WINDOW_RESIZABLE
	SDL_FULLSCREEN_WINDOW_FLAGS uint32 = SDL_WINDOW_FLAGS | sdl.WINDOW_FULLSCREEN_DESKTOP
	SDL_WINDOW_WIDTH            int32  = 800
	SDL_WINDOW_HEIGHT           int32  = 600
)

func SdlInit() error {
	var err error

	// Initialize SDL
	sdl.Do(func() {
		err = sdl.Init(SDL_INIT_FLAGS)
	})
	if err != nil {
		err = fmt.Errorf("failed initializing SDL: %w", err)
		return err
	}

	// Set some base SDL settings
	sdl.Do(func() {
		// Disable the Linux compositor flicker.
		// https://github.com/mosra/magnum/issues/184#issuecomment-425952900
		sdl.SetHint(sdl.HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0")

		sdl.DisableScreenSaver()

		// Capture the mouse for movement
		//sdl.SetRelativeMouseMode(true)
	})

	return nil
}

func SdlQuit() {
	sdl.Do(func() {
		sdl.Quit()
	})
}