#include "game.h"

void	game_loading_screen(void) {
	int logoPositionX = GetScreenWidth() * 0.5 - 128;
	int logoPositionY = GetScreenHeight() * 0.5 - 128;

	int framesCounter = 0;
	int lettersCount = 0;

	int topSideRecWidth = 16;
	int leftSideRecHeight = 16;

	int bottomSideRecWidth = 16;
	int rightSideRecHeight = 16;

	int state = 0;                  // Tracking animation states (State Machine)
	float alpha = 1.0f;             // Useful for fading

	SetTargetFPS(60);

	while (state != 4) {

		// Update
		//----------------------------------------------------------------------------------
		if (state == 0)                 // State 0: Small box blinking
		{
			framesCounter++;
			
			if (framesCounter == 120)
			{
				state = 1;
				framesCounter = 0;      // Reset counter... will be used later...
			}
		}
		else if (state == 1)            // State 1: Top and left bars growing
		{
			topSideRecWidth += 4;
			leftSideRecHeight += 4;
			
			if (topSideRecWidth == 256) state = 2;
		}
		else if (state == 2)            // State 2: Bottom and right bars growing
		{
			bottomSideRecWidth += 4;
			rightSideRecHeight += 4;
			
			if (bottomSideRecWidth == 256) state = 3;
		}
		else if (state == 3)            // State 3: Letters appearing (one by one)
		{
			framesCounter++;
			
			if (framesCounter/12)       // Every 12 frames, one more letter!
			{
				lettersCount++;
				framesCounter = 0;
			}
			
			if (lettersCount >= 10)     // When all letters have appeared, just fade out everything
			{
				alpha -= 0.02f;
				
				if (alpha <= 0.0f)
				{
					alpha = 0.0f;
					state = 4;
				}
			}
		}
		BeginDrawing(); {
			ClearBackground(RAYWHITE);
			
			if (state == 0)
			{
				if ((framesCounter/15)%2) DrawRectangle(logoPositionX, logoPositionY, 16, 16, BLACK);
			}
			else if (state == 1)
			{
				DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, BLACK);
				DrawRectangle(logoPositionX, logoPositionY, 16, leftSideRecHeight, BLACK);
			}
			else if (state == 2)
			{
				DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, BLACK);
				DrawRectangle(logoPositionX, logoPositionY, 16, leftSideRecHeight, BLACK);
				
				DrawRectangle(logoPositionX + 240, logoPositionY, 16, rightSideRecHeight, BLACK);
				DrawRectangle(logoPositionX, logoPositionY + 240, bottomSideRecWidth, 16, BLACK);
			}
			else if (state == 3)
			{
				DrawRectangle(logoPositionX, logoPositionY, topSideRecWidth, 16, Fade(BLACK, alpha));
				DrawRectangle(logoPositionX, logoPositionY + 16, 16, leftSideRecHeight - 32, Fade(BLACK, alpha));
				
				DrawRectangle(logoPositionX + 240, logoPositionY + 16, 16, rightSideRecHeight - 32, Fade(BLACK, alpha));
				DrawRectangle(logoPositionX, logoPositionY + 240, bottomSideRecWidth, 16, Fade(BLACK, alpha));
				
				DrawRectangle(GetScreenWidth()/2 - 112, GetScreenHeight()/2 - 112, 224, 224, Fade(RAYWHITE, alpha));
				
				DrawText(TextSubtext("raylib", 0, lettersCount), GetScreenWidth()/2 - 44, GetScreenHeight()/2 + 48, 50, Fade(BLACK, alpha));
			}		
		} EndDrawing();
	}
	SetTargetFPS(165);
}