#! /bin/bash

version=1.0
editor=$USER
title=
file=
ending=tex
# path to this script
script=$( 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 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
    echo $1
    echo $2
    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;;
        -h|--help)
            Help
            exit;;
        --)
            break;
    esac
done

if [[ -z "$file" ]]; then
    Errorfile
    exit
elif [[ "$ending" == "pdf" ]]; then
    header=$script/header.md
    echo $header
    sedfile=$script/body.sed
    echo $sedfile
    picture=$script/Logo.png 
    echo $picture
    sed -i 's,Editor:.*,Editor: '"$editor"' \\\\,' $header 
    echo 1
    sed -i 's,Title:.*,Title: '"$title"',' $header 
    echo 2
    sed -i 's,textwidth]{.*,textwidth]{'"$picture"'}},' $header
    echo 3
    cat $file.md $header | sed -E -f $sedfile| pandoc --filter pandoc-latex-environment  --number-sections --toc -i - -o $file.pdf
    Open
elif [[ "$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