// some required libraries
#include <LiquidCrystal.h> // lcd display
#include <SPI.h> // communications
#include <Wire.h> // i have no idea, but needed
#include <Adafruit_GFX.h> // gfx library for oled
#include <Adafruit_SSD1306.h> // oled display driver
#define OLED_RESET 4 // oled reset code
Adafruit_SSD1306 display(OLED_RESET); // oled reset
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // lcd setup
// variables used for buttons
const int buttonPin_left = 7; // left button pin
const int buttonPin_up = 8; // up button pin
const int buttonPin_right = 9; // right button pin
int buttonState_up = 0; // up button state
int buttonState_left = 0; // left button state
int buttonState_right = 0; // right button state

// lets create some functions
void LcdWrite(int x, int y, String text) { // this function will write to the lcd screen, this is not handled by RenderScene()
    lcd.setCursor(x, y); // set our lcd cursor position
    lcd.print(text); // write to the lcd screen
}

void OledWrite(int x, int y, int size, String text) { // this function will write to our oled
    display.setTextSize(size); // set the font size
    display.setTextColor(WHITE); // set the font color
    display.setCursor(x, y); // set the cursor position
    display.println(text); // add our text to the oled buffer
}

void RenderScene() { // this function will render our scene on the oled display
    display.display(); // update our oled (print buffer)
}

String fill = "-"; // the character that will fill our bar
String fill_draw; // the variable that holds our bar string
String blank = " "; // blank space
int bars_total = 0; // this var will hold the number of bars on screen
const int bars = 10; // this variable will store the maximum number of bars

void PowerBar(int button) { // the bar used to display the force of the cannon
    OledWrite(0, 55, 1, "[                   ]"); // our power bar, 19 bars
    if (button == 2) { // if the right button is pressed
        fill_draw += fill; // add a character to the fill_draw variable
        bars_total++; // add one to our total bar count
    }
    if (button == 1) { // if the left button is pressed

    }
    OledWrite(1, 55, 1, fill_draw);
}

void Controls() { // this functions checks for input from the controller
    buttonState_up = digitalRead(buttonPin_up); // up button state
    buttonState_left = digitalRead(buttonPin_left); // left button state
    buttonState_right = digitalRead(buttonPin_right); // right button state
    if (buttonState_up == HIGH) { // up button detection
        PowerBar(0); // tell the power bar function the up button was pressed
    }
    if (buttonState_left == HIGH) { // left button detection
        PowerBar(1); // tell the power bar function the left button was pressed
    }
    if (buttonState_right == HIGH) { // right button detection
        PowerBar(2); // tell the power bar function the right button was pressed
    }
}
void setup() { // our function that is loaded first
    display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // lets begin our oled display/connection
    display.clearDisplay(); // clear oled display from anything left over from last session
    lcd.begin(16, 2); // define our lcd properties
    lcd.clear(); // clear our lcd screen from any residue
    LcdWrite(0, 0, "Arduino Cannon"); // display program name to lcd
    LcdWrite(0, 1, "By Dan Jones"); // display creator to lcd
}

void loop() { // our looping function
    OledWrite(0, 10, 2, "Test"); // test text
    PowerBar(9); // put our power bar graphics into the oled buffer
    Controls(); // check for input
    RenderScene(); // render our scene to the oled display
}