#!/usr/bin/env bash
set -euo pipefail

user="root"
host="10.11.99.1"

args=()

print_help() {
    echo "Usage: script.sh [options] [PDF files...]"
    echo ""
    echo "Options:"
    echo "  --user <username>      Specify the username (default: root)"
    echo "  --host <hostname>      Specify the host (default: 10.11.99.1)"
    echo "  --help, -h             Display this help message"
    echo ""
    echo "PDF files:"
    echo "  List of PDF files to be processed"
}

while [[ "$#" -gt 0 ]]; do
    case $1 in
        --user) user="$2"; shift ;;
        --host) host="$2"; shift ;;
        --help|-h) print_help; exit 0 ;;
        *) args+=("$1") ;;
    esac
    shift
done

set -- "${args[@]}"

if [[ "$#" -eq 0 ]]; then
  print_help
  exit
fi

process_pdf() {
    local pdf_fname
    local metadata_body
    local pdf_docname
    local document_uuid
    local content_body

    pdf_fname="$1"
    pdf_docname="$(basename "$pdf_fname" .pdf)"
    document_uuid="$(uuidgen)"

    echo "Preparing '$pdf_fname'"

    cat "$pdf_fname" > "${dir}/${document_uuid}.pdf"

    metadata_body="{
        \"deleted\": false,
        \"lastModified\": \"$(date -u +"%s")000\",
        \"metadatamodified\": false,
        \"modified\": false,
        \"parent\": \"\",
        \"pinned\": false,
        \"synced\": true,
        \"type\": \"DocumentType\",
        \"version\": 1,
        \"visibleName\": \"${pdf_docname}\"
    }"

    content_body="{
        \"extraMetadata\": {
        },
        \"fileType\": \"pdf\",
        \"fontName\": \"\",
        \"lastOpenedPage\": 0,
        \"lineHeight\": -1,
        \"margins\": 100,
        \"orientation\": \"portrait\",
        \"pageCount\": 1,
        \"pages\": [
        ],
        \"textScale\": 1,
        \"transform\": {
            \"m11\": 1,
            \"m12\": 0,
            \"m13\": 0,
            \"m21\": 0,
            \"m22\": 1,
            \"m23\": 0,
            \"m31\": 0,
            \"m32\": 0,
            \"m33\": 1
        }
    }"

    local pagedata_body=""

    echo "$metadata_body" > "${dir}/${document_uuid}.metadata"
    echo "$content_body" > "${dir}/${document_uuid}.content"
    echo "$pagedata_body" > "${dir}/${document_uuid}.pagedata"

    for subdir in "" ".cache" ".highlight" ".textconversion" ".thumbnails"; do
        mkdir "$dir/$document_uuid$subdir"
    done
    
    echo "Copying '$pdf_fname' as '$pdf_docname'"
    scp -rq "$dir/$document_uuid".* "$user@$host:/home/root/.local/share/remarkable/xochitl/"
    echo "Done transferring '$pdf_fname' as '$pdf_docname'"
}

dir="$(mktemp -d)"

for pdf_fname in "$@"; do
    process_pdf "$pdf_fname"
done

echo "Restarting xochitl"
ssh "$user@$host" systemctl restart xochitl
echo "Done"