#!/bin/zsh -f

LIBRARYFILE=~/.library/library.rec
LIBRARYDIRECTORY=~/.library
GIT=true

if [[ $# -eq 0 ]] ; then
    echo "library [ help | query query-expressions | add | emacs | git [ other-args ] | bulk-add number | report [ name | list | new name ] | edit id field ]"
    exit
fi

function run-query {
    recsel -t Book $@ ${LIBRARYFILE}
}

function add-single {
    echo -n "Title: "
    read TITLE
    echo -n "Author: "
    read AUTHOR
    echo -n "LCCN: "
    read LCCN
    echo -n "Copyright: "
    read COPYRIGHT
    echo -n "Publisher: "
    read PUBLISHER
    echo -n "ISBN: "
    read ISBN
    echo -n "Location: "
    read LOCATION
    recins -t Book \
           -f Title -v "${TITLE}" \
           -f Author -v "${AUTHOR}" \
           -f LCCN -v "${LCCN}" \
           -f Copyright -v "${COPYRIGHT}" \
           -f Publisher -v "${PUBLISHER}" \
           -f ISBN -v "${ISBN}" \
           -f Location -v "${LOCATION}" \
           ${LIBRARYFILE}
    if [[ $GIT == "true" ]] ; then
        OLD=`pwd`
        cd ${LIBRARYDIRECTORY}
        git add `basename ${LIBRARYFILE}`
        git commit -m "Added record for \"${TITLE}\""
        cd ${OLD}
    fi
}

function bulk-add {
    GITOLD=${GIT}
    GIT=FALSE
    for i in {1..$1} ; do
        echo "Adding book number ${i}"
        add-single
    done
    GIT=${GITOLD}
    if [[ $GIT == "true" ]] ; then
        OLD=`pwd`
        cd ${LIBRARYDIRECTORY}
        git add `basename ${LIBRARYFILE}`
        git commit -m "Added ${1} records"
        cd ${OLD}
    fi
}

function do-report {
    NAME=$1
    shift
    case ${NAME} in
        list)
            for report in ${LIBRARYDIRECTORY}/*.report ;
            do
                echo " - $(basename -- ${report} .report)"
            done
        ;;
        new)
            REPORT=$1
            shift
            echo "# -*- mode: shell-script -*-" > ${LIBRARYDIRECTORY}/${REPORT}.report
            emacsclient --alternate-editor="" -n ${LIBRARYDIRECTORY}/${REPORT}.report
        ;;
        *)
            if [[ -e ${LIBRARYDIRECTORY}/${NAME}.report ]] ; then
               sh ${LIBRARYDIRECTORY}/${NAME}.report $@
            fi
    esac
}

function do-git {
    OLD=`pwd`
    cd ${LIBRARYDIRECTORY}
    git $@
    cd ${OLD}
}

function display-help {
    cat <<EOF
library [ help | query query-expressions | add | emacs | git [ other-args ] | bulk-add number | report [ name | list | new name ] ]

help:     Display this help message.
query:    Query Library Database.
add:      Add a singular book record.
emacs:    View records in emacs.
git:      Run a git command.
report:   Run a report.
bulk-add: Add a specified number of records.
EOF
}

function do-edit {
    ID=$1
    shift
    FIELD=$1
    shift

    if [[ $FIELD = "Withdrawn" ]] ; then
        recins -e "ID = ${ID}" \
               -f "Withdrawn" -v `date "%a, %d %b %Y %H:%M:%S %z"` \
               ${LIBRARYFILE}
    else
        VALUE=$1
        shift
        recins -e "ID = ${ID}" \
               -f "${FIELD}" -v "${VALUE}" \
               ${LIBRARYFILE}
    fi
}

COMMAND=$1
shift

case ${COMMAND} in
    help)
        display-help
        exit
        ;;
    query)
        run-query $@
        exit
        ;;
    add)
        add-single
        exit
        ;;
    git)
        do-git $@
        exit
        ;;
    bulk-add)
        bulk-add $@
        exit
        ;;
    report)
        do-report $@
        exit
        ;;
    emacs)
        emacsclient --alternate-editor="" -n ${LIBRARYFILE}
        exit
        ;;
    edit)
        do-edit $@
        exit
        ;;
    *)
        display-help
        exit
esac