/*
===============================================================================
 Name        : labo2 Ecran SPI
 Author      : M-Rohmer
 Copyright   : HES-SO hepia
 Year        : 2024
===============================================================================
 */


#include "config_LPC1769.h"
#include <stdint.h>
#include <stdbool.h>

#include "GPIO.h"
#include "SPI.h"

const Point SCREEN_ORIGIN = {0,0};
const Size SCREEN_SIZE = {240,320};
const Rectangle SCREEN = {SCREEN_ORIGIN,SCREEN_SIZE};

Player player;

void init(void)
{
	ILI9341_Initial();
}

int scrolling = 0;
bool need_to_scroll = false;

bool on = true;
void TIMER0_IRQHandler(void){
	//8000HZ smaple rate
	ClearTimer0();

	SetAudio(800);
	on = true;
	SetAudio(200);
}

void EINT3_IRQHandler(void){
	int buttonPressed = Detect_AB_buttons();
	if(buttonPressed == 2){
		//button A pressed
	}else{
		//button B pressed
	}
	ClearButtons();
}

int timer_count = 0;
int scroller_divider = 25;
int scroll_increment = 1;
void increment_scroll(int value){
	scrolling += value;
	if(scrolling <= 0)
		scrolling = 319;
	if(scrolling >= 320)
		scrolling = 1;
}
void SysTick_Handler(){
	timer_count += 1;
	//update the screen
	if(timer_count >= scroller_divider){
		increment_scroll(-scroll_increment);
		need_to_scroll = true;
		timer_count = 0;
	}
}

int number_of_digits (int value){
	int interVal = value;
	int count = 0;
	while(interVal > 0){
		interVal = interVal /10;
		count ++;
	}
	return count;
}

void convert_to_string(int value, int nbr_digits, char* str){
	for(int i = nbr_digits-1; i >= 0; i--){
		int interVal = value;
		interVal /= 10;
		int res = value - interVal * 10;
		str[i] = '0'+res;
		value /= 10;
	}
	str[nbr_digits] = '\0';
}

void scroll_array(int **array,int **newArray,int width,int height){
	for(int y = 0;y < height;y++){
		for(int x = 0;x < width;x++){
			if(y < height-1 && x < width -1)
				newArray[x+1][y+1] = array[x][y];
		}
	}
}

Player CreatePlayer(){
	int HP = 100;
	Size playerSize = {32,32};
	Point position = {SCREEN_SIZE.Width / 2 - playerSize.Width /2,SCREEN_SIZE.Height / 2 - playerSize.Height/2};
	Rectangle playerHitbox = {position,playerSize};
	Player player = {playerHitbox,HP};
	return player;
}

void RefreshPlayer(Point vector){
	if(player.Hitbox.Position.Y + vector.Y < 0){
		player.Hitbox.Position.Y = SCREEN_SIZE.Height + (player.Hitbox.Position.Y - (0-vector.Y));
	}else{
		if(player.Hitbox.Position.Y + vector.Y >= SCREEN_SIZE.Height){
			player.Hitbox.Position.Y = vector.Y - (SCREEN_SIZE.Height - player.Hitbox.Position.Y);
		}else{
			player.Hitbox.Position.Y += vector.Y;
		}
	}

	player.Hitbox.Position.X += vector.X;

	if(player.Hitbox.Position.X + player.Hitbox.Size.Width >= SCREEN_SIZE.Width)
		player.Hitbox.Position.X = SCREEN_SIZE.Width - player.Hitbox.Size.Width -1;
	if(player.Hitbox.Position.X < 0)
		player.Hitbox.Position.X = 0;


	Rectangle rect = player.Hitbox;
	rect.Position = (Point){0,0};
	DrawPlayer(player,rect);
	Refresh_Area(player.Hitbox);
}

int main(void) {
	init();
	InitButtons();
	InitTimer();
	InitAudio();
	LedSetState8(128+32+8+2);
	Point text_origin = {240 / 2 - 8/2,(320 / 6) * 5  - 4};

	player = CreatePlayer();

	Resize_Window(SCREEN);
	Draw_stars();


	int increment = 3;
	Point momentum = {0,0};
	Size charSize = {7,11};

	while (true)
	{
		int JoystickState = JoystickGetState();
		Point vec = {0,0};

		if(JoystickState & (1 << 4)){
			vec.X -= increment;
		}
		if(JoystickState & (1 << 3)){
			vec.Y += increment;
		}
		if(JoystickState & (1 << 2)){
			vec.X += increment;
		}
		if(JoystickState & (1 << 1)){
			vec.Y -= increment;
		}

		if(need_to_scroll){
			//Refresh_Area((Rectangle){text_origin,(Size){charSize.Width * 3,charSize.Height}});
			scroll(scrolling);
			player.Hitbox.Position.Y -= 1;
			need_to_scroll = false;

			int digits = number_of_digits(scrolling);
			char newStr[digits+1];
			convert_to_string(scrolling,digits,&newStr);
			Point new_origin = {text_origin.X,(text_origin.Y + scrolling)%320};
			Rectangle areaToRefresh = {{new_origin.X,new_origin.Y+3},{charSize.Width* 4,charSize.Height+5}};

			Refresh_Area(areaToRefresh);
			DrawText(new_origin,newStr,charSize);
		}


		momentum.X += vec.X;
		momentum.Y += vec.Y;

		if(momentum.X > 35)
			momentum.X = 35;
		if(momentum.X < -40)
			momentum.X = -40;

		if(momentum.Y > 35)
			momentum.Y = 35;
		if(momentum.Y < -35)
			momentum.Y = -35;

		RefreshPlayer(momentum);

	}

}