#!/bin/bash

COMIX=${COMIX:-"mcomix -fmdh"}
COLLECT=${COLLECT:-"collect"}
D=${PREFIX:-"/tmp/mb-$$"}


######
###### Initialize
######

set -m
exec 2>/dev/null

### tmp directory
mkdir -p "$D"
mkfifo "$D/event"
mkfifo "$D/history"
mkfifo "$D/book"

### file descriptors
exec 7<>"$D/event"
exec 8<>"$D/history"
exec 9<>"$D/book"

### initial run
echo next >&7 &

### trap
function cleanup () {
    for pid in `jobs -p`; do
        kill -TERM -"${pid}"
    done
    wait

    exec 7<&- 7>&-
    exec 8<&- 8>&-
    exec 9<&- 9>&-

    rm -rf "$D";
}
trap "cleanup" EXIT

### working directory
cd "${COLLECT}"



######
###### Main
######

### Generate Book List
ls | sort -R >&9 &


### GUI
(
    yad --text-info --tail            \
        --button=Jobs:'echo jobs'     \
        --button=Delete:'echo delete' \
        --button=Quit:'echo quit'     ;
    echo quit
) <&8 >&7 &


### Event Loop
while read event; do
    case "${event}" in
        delete)
            ;;
        next)
            read book <&9
            echo "${book}" >&8
            ( ${COMIX} "${book}"; echo next >&7 ) &
            ;;
        quit) break ;;
        jobs) jobs ;;
    esac
done <&7