size(800, 600); // Adjusted height to 600
background(255);

// Define variables
float numBars = 10.0;
int gridSize = 10;
float sum = 0.0;
float mean = 0.0; // Adjusted mean value
float xOrigin = width * 0.1;
float yOrigin = height * 0.2;
float xEnd = width * 0.9;
float yEnd = height * 0.9;
float yLabelOffset = height * 0.04;
float xLabelOffset = width * 0.04;
float titleX = width * 0.5;
float titleY = height * 0.1;
float smallOffset = height * 0.03;
float titleFontSize = width * 0.025;
color barColor = color(100, 200, 100); // Greenish color

// Define grid and bar dimensions
float areaWidth = xEnd - xOrigin;
float areaHeight = yEnd - yOrigin;
float gridWidth = areaWidth / gridSize;
float gridHeight = areaHeight / gridSize;
float maxBarHeight = yEnd - yOrigin;
float xValue;
float barStart = yOrigin;
float barHeight = maxBarHeight / numBars;
float barLength;

// Generate random data for bars
int[] bars = {5, 7, 2, 9, 4, 8, 3, 6, 10, 1};

// Add title
fill(0);
String title = "Graph Visualization";
textSize(titleFontSize);
textAlign(CENTER);
text(title, titleX, titleY);

// Draw grid lines
noFill();
strokeWeight(1);
for (float x = xOrigin; x < xEnd; x += gridWidth) {
  for (float y = yOrigin; y < yEnd; y += gridHeight) {
    rect(x, y, gridWidth, gridHeight);
  }
}

// Draw x and y axes
strokeWeight(5);
strokeCap(ROUND);
line(xOrigin, yEnd, xEnd, yEnd); // x axis
line(xOrigin, yOrigin, xOrigin, yEnd); // y axis

// Add x-axis labels
for (int i = 0; i <= gridSize; i++) {
  String label = str(i); 
  text(label, xOrigin + i * gridWidth, yEnd + xLabelOffset);
}

// Draw bars and labels
strokeWeight(1);
for (int i = 0; i < numBars; i++) {
  fill(barColor); // Adjusted color
  barLength = (bars[i] * gridWidth) / 2; // Adjusted width of the rectangles
  rect(xOrigin, barStart + (i * barHeight), barLength, barHeight);
  
  // Add bar value labels
  fill(255);
  String label = str(bars[i]);  
  text(label, xOrigin + barLength - smallOffset, 
       barStart + (i * barHeight) + (barHeight / 1.5 ));
}

// Calculate and draw mean line
for (int i = 0; i < numBars; i++) {
  sum += bars[i];
}
mean = sum / numBars; // Adjusted mean calculation
stroke(235, 16, 13);
strokeWeight(3);
xValue = xOrigin + (mean * gridWidth); 
line(xValue, yOrigin, xValue, yEnd);

// Add mean value label
fill(235, 16, 13);
String meanLabel = "Mean: " + mean;
textSize(titleFontSize);
textAlign(CENTER);
text(meanLabel, xValue, height * 0.18);

save("Assignment2.png");