#!/bin/bash

IMG_DEPTH=8

echo "Separating document into pages"

pdfseparate /tmp/input_file /tmp/page-%d.pdf

NUM_PAGES=$(find /tmp/page-*.pdf |wc -l)
echo "Document has $NUM_PAGES pages"
echo

for FILENAME in $(find /tmp/page-*.pdf); do
    FILENAME_BASE=${FILENAME%.pdf}
    PAGE=$(basename $FILENAME_BASE |cut -d"-" -f2)

    echo "Converting page $PAGE to pixels"

    # Convert to png
    pdftocairo "$FILENAME" -png -singlefile "$FILENAME_BASE"
    
    # Get the width and height
    IMG_WIDTH=$(identify -format "%w" "$FILENAME_BASE.png")
    IMG_HEIGHT=$(identify -format "%h" "$FILENAME_BASE.png")
    echo $IMG_WIDTH > $FILENAME_BASE.width
    echo $IMG_HEIGHT > $FILENAME_BASE.height
    
    # Convert to rgb
    convert "$FILENAME_BASE.png" -depth $IMG_DEPTH rgb:"$FILENAME_BASE.rgb"

    # Delete the png
    rm "$FILENAME_BASE.png"

    # Move files needed for the next step to the mounted volume
    mv "$FILENAME_BASE.rgb" /dangerzone
    mv "$FILENAME_BASE.width" /dangerzone
    mv "$FILENAME_BASE.height" /dangerzone
done