#! /bin/bash

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


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    -c, --toc               prints a table of content at the start of the document 
echo    -p, --picture           changes the default picture to a specified picture relative to current path
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 -f dateiname -e pdf 
echo md -\> docx : pandocPipeline -f dateiname -e docx
echo Author is by default $editor to change the author add the author to the metadata in your markdown file
echo Title is by default the filename to change the title add the title to the metadata in your markdown file
}

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
        -f|--file)
            file="$2"
            shift 2;;
        -e|--ending)
            ending="$2"
            shift 2;;
        -v|--version)
            echo pandocPipeline $version
            exit;;
        -p|--picture)
            picture="$2"
            shift 2;;
        -c|--toc)
            toc=true
            shift;;
        -h|--help)
            Help
            exit;;
        --open)
            open=1
            shift;;
        --)
            break;
    esac
done

if [[ -z "$file" ]]; then
    Errorfile
    exit
fi
title=$file
editor=$(grep 'author: .*' $file.md)
editor=${editor:8}
title=$(grep 'title: .*' $file.md)
title=${title:7}
if [[ "$ending" == "pdf" ]]; then
    header=$script/header.md
    sedfile=$script/body.sed
    sed -i 's,Editor:.*,Editor: '"$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.py  --number-sections --toc -i - -o $file.pdf
    else
        cat $file.md $header | sed -E -f $sedfile| pandoc --filter pandoc_latex_environment.py  --number-sections -i - -o $file.pdf
    fi
    [[ $open == "1" ]] && Open || true
elif [[ "$ending" == "docx" ]]; then
    refdoc=$script/custom-reference.docx
    pandoc $file.md --reference-doc=$refdoc -f markdown -t $ending -s -o $file.$ending
    [[ $open == "1" ]] && Open || true
else
    pandoc $file.md -f markdown -t $ending -s -o $file.$ending
    [[ $open == "1" ]] && Open || true
fi