#! /bin/bash

version=1.0
editor=$USER
title=
file=
ending=tex
toc=false
# path to this script
script=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)


Help() {
echo Tool to convert file from markdown to another format
echo Usage: pandocPipeline [OPTION] [COMMAND]
echo    -h, --help              show this help screen
echo    -f, --file              specify filename without extension
echo    -e, --ending            spefify target file format
echo    -u, --user=$editor        enter name of file editor set between "" \(only for target format pdf\)
echo    -t, --title             enter title of document set between "" \(only for target format pdf\)
echo    -c --toc                prints a table of content at the start of the document 
echo Pipeline is optimized for target format pdf and docx but works with others as well
echo Possible fileformats see: https://pandoc.org/diagram.svgz?v=20230203095535 
echo Examples:
echo md -\> pdf : pandocPipeline -u "Dokumentbearbeiter" -t "Dokumententitel" -f dateiname -e pdf 
echo md -\> docx : pandocPipeline -f dateiname -e docx
}

Errorfile() {
echo No file was given
echo Please add a filename to your command
echo Try 'pandocPipeline --help' for more information
}

Open() {
    xdg-open $file.$ending
    exit
}

POSITIONAL_ARGS=()

while [[ $# -gt 0 ]]; do
    case $1 in
        -u|--user)
            editor="$2"
            shift 2;;
        -t|--title)
            title="$2"
            shift 2;;
        -f|--file)
            file="$2"
            shift 2;;
        -e|--ending)
            ending="$2"
            shift 2;;
        -v|--version)
            echo pandocPipeline $version
            exit;;
        -c|--toc)
            toc=true
            shift;;
        -h|--help)
            Help
            exit;;
        --)
            break;
    esac
done

if [[ -z "$file" ]]; then
    Errorfile
    exit
elif [[ "$ending" == "pdf" ]]; then
    header=$script/header.md
    sedfile=$script/body.sed
    picture=$script/Logo.png 
    sed -i 's,Editor:.*,Editor: '"$editor"' \\\\,' $header 
    sed -i 's,Title:.*,Title: '"$title"',' $header 
    sed -i 's,textwidth]{.*,textwidth]{'"$picture"'}},' $header
    if "$toc"; then
        cat $file.md $header | sed -E -f $sedfile| pandoc --filter pandoc-latex-environment  --number-sections --toc -i - -o $file.pdf
    else
        cat $file.md $header | sed -E -f $sedfile| pandoc --filter pandoc-latex-environment  --number-sections -i - -o $file.pdf
    fi
    Open
elif [[ "$ending" == "docx" ]]; then
    refdoc=$script/custom-reference.docx
    pandoc $file.md --reference-doc=$refdoc -f markdown -t $ending -s -o $file.$ending
    Open
else
    pandoc $file.md -f markdown -t $ending -s -o $file.$ending
    Open 
fi