input_file="TheThreeCalamaties-3200x1828.jpg"
output_prefix="TheThreeCalamaties"
title="The Three Calamaties"

# Check if the input file exists
if [ ! -f "$input_file" ]; then
  echo "Error: File '$input_file' does not exist."
  exit 1
fi

# Get dimensions of the input image
width=$(magick identify -format "%w" "$input_file")
height=$(magick identify -format "%h" "$input_file")
echo "Input file is ${width}x${height}"

###############################
# Text lines and their font sizes
line1="${title}"
line1_font_size=180

line2="www.GrailHeart.com"
line2_font_size=120

# Font
font="./Caudex-Regular.ttf"   # Path to the Caudex font

# Colors to loop through
colors=("ff0000" "00FF00" "0000ff")

# Dynamically determine text image heights based on font sizes
text_height1=$((line1_font_size * 3 / 2))
text_height2=$((line2_font_size * 3 / 2))
echo "text_height1: ${text_height1}"
echo "text_height2: ${text_height2}"

# Loop through colors
for color in "${colors[@]}"; do
  # Temporary text images
  text_image1="_text1_${color}.png"
  text_image2="_text2_${color}.png"
  
  # Create temporary text images for each line with the current color
  magick -size ${width}x${text_height1} -background none -gravity center \
      -font "$font" -pointsize "$line1_font_size" -fill "#${color}" \
      label:"$line1" "$text_image1"

  magick -size ${width}x${text_height2} -background none -gravity center \
      -font "$font" -pointsize "$line2_font_size" -fill "#${color}" \
      label:"$line2" "$text_image2"

  # Recalculate text heights in case padding is added by the font rendering
  text_height1=$(magick identify -format "%h" "$text_image1")
  text_height2=$(magick identify -format "%h" "$text_image2")

  # Calculate total canvas height
  canvas_height=$((height + text_height1 + text_height2 + 30))

  # Output file name
  output_file="${output_prefix}-${color}.png"

  # Create a transparent canvas and compose the final image
  magick -size ${width}x${canvas_height} xc:none \
      \( "$input_file" -gravity north \) -composite \
      \( "$text_image1" -gravity south -geometry +0+$((text_height2 + 20)) \) -composite \
      \( "$text_image2" -gravity south -geometry +0+10 \) -composite \
      "$output_file"

  echo "Generated: $output_file"

  # Clean up temporary text images
  rm "$text_image1" "$text_image2"
done