#!/bin/bash


if [ "$(basename "$0")" == "syncthing_to_read" ]; then
    for a in "$@"; do
        LOCTMPDIR="$(mktemp -d)"
        PDF_FILE=$(bibtex_to_paper --only-print "$a")
        mkdir -p "$LOCTMPDIR/a"
        mkdir -p "$LOCTMPDIR/b"
        cp -l "$PDF_FILE" "$LOCTMPDIR/a/file.pdf";
        if [ -e "${PDF_FILE}.annot" ]; then
            cp "$PDF_FILE" "$LOCTMPDIR/b/file.pdf";
            chmod u+w "$LOCTMPDIR/b/file.pdf"
            qprint -d "${PDF_FILE}.annot" | patch -d "$LOCTMPDIR/b" --binary;
        else
            cp "$PDF_FILE" "$LOCTMPDIR/b/file.pdf";
            chmod u+w "$LOCTMPDIR/b/file.pdf"
        fi;
        cp "$LOCTMPDIR/b/file.pdf" ~/Sync/research_papers/to_read/"$(basename "$PDF_FILE")";
        rm -f "$LOCTMPDIR/a/file.pdf"
        rm -f "$LOCTMPDIR/b/file.pdf"
        rmdir "$LOCTMPDIR/a" "$LOCTMPDIR/b" "$LOCTMPDIR"
    done;
fi;

if [ "$(basename "$0")" == "syncthing_read" ]; then
    #echo "Currently not implemented";
    # exit 1;
    while IFS= read -r -d '' file; do
        unset IFS
        PDF_FILE="$(bibtex_to_paper --only-print --search-by-file "$(basename "$file")")"
        if [ -n "$PDF_FILE" ]; then
            ( set -e
              LOCTMPDIR="$(mktemp -d)"
              mkdir -p "$LOCTMPDIR/a";
              mkdir -p "$LOCTMPDIR/b";
              cp -l "${PDF_FILE}" "$LOCTMPDIR/a/file.pdf";
              chmod u+w "$LOCTMPDIR/a/file.pdf"
              cp -l "$file" "$LOCTMPDIR/b/file.pdf";
              echo "${PDF_FILE}.annot";
              (cd "$LOCTMPDIR";
               diff -Nura a b ) | qprint --encode --binary > "${PDF_FILE}.annot"
              # delete the annot file if it has size 0
              if ! [ -s "${PDF_FILE}.annot" ]; then
                  rm -f "${PDF_FILE}.annot"
              fi;
              rm -f "$LOCTMPDIR/a/file.pdf"
              rm -f "$LOCTMPDIR/b/file.pdf"
              rmdir "$LOCTMPDIR/a" "$LOCTMPDIR/b" "$LOCTMPDIR"
              mv "$file" ~/Sync/research_papers/annotations_recorded
            );
        fi;
    done < <(find ~/Sync/research_papers/read/ -type f -print0)
fi;