#!/bin/bash

function execPdfToCbz {

  input=${1}
  output=${2}

  quality=90
  density=150
  height=1280
  width=''
  sharpen='0x1.0'
  background='#FFFFFF'

  convert \
    -verbose \
    -density ${density} \
    -trim \
    "${input}" \
    -background "${background}" \
    -resize ${width}x${height} \
    -quality ${quality} \
    -sharpen ${sharpen} \
    ${output}
}

input=${1}

filename=$(basename "${input}")
filename="${filename%.*}"

directory='ebook/'
outputFormat='jpg'

mkdir \
  --verbose \
  "${directory}"

if [[ -f ${input} ]]; then

  execPdfToCbz "${input}" "${directory}page-%04d.${outputFormat}"

elif [[ -d ${input} ]]; then

  index=0

  for inputFile in ${input}*.pdf; do
    execPdfToCbz "${inputFile}" "${directory}page-$(printf '%04d' ${index})-%04d.${outputFormat}"
    index=$((${index}+1))
  done

else

  echo 'Veuillez renseigner un fichier PDF ou un dossier de fichiers PDF'
  exit

fi

zip \
  --verbose \
  "${filename}.cbz" \
  ${directory}page\-*.${outputFormat}

rm \
  --verbose \
  -fr \
  "${directory}"