#!/bin/sh

isnum() {
    grep -xq '[0-9]\+' <<<"$1"
}

findfile() {
    local file tail eq eqt m
    for file in "$1"*; do
	tail="${file#$1}"
	eq="${tail%.*}"
	m=n
	if [ "${eq%% *}" -eq "$2" ] 2>/dev/null; then
	    if [[ "$eq" == *\ * ]]; then
		eqt="${eq#* }"
	    else
		eqt=
	    fi
	    m=y
	elif [ "${eq:0:${#2}}" = "$2" ]; then
	    eqt="${eq:${#2}}"
	    if [ "${eqt:0:1}" = " " -o -z "$eqt" ]; then
		eqt="${eqt# }"
		m=y
	    fi
	fi
	if [ "$m" = y ]; then
	    if [ "$eqt" = "$3" -o "$eqt" = "($3)" ]; then
		echo "$file"
		return 0
	    fi
	fi
    done
    return 1
}

cmdline=(mplayer -fs)

while [ "${1:0:1}" = - ]; do
    a="$1"
    shift
    case "$a" in
	-h)
	    echo "usage: planime [-ht] [-s PAR VAL] [NAME-QUAL] [EP|.] [TYPE-QUAL]" >&2
	    exit 0
	    ;;
	-t)
	    cmdline=("${cmdline[@]}" -ao oss:/dev/dsp1)
	    ;;
	-s)
	    savepar="$1"
	    shift
	    saveval="$1"
	    shift
	    ;;
    esac
done

base="$(basename "$(pwd)")"
nextep=n
file=
tqual=
if [ $# -eq 0 ]; then
    nextep=y
elif [ $# -eq 1 ]; then
    if [ -r "$1" ]; then
	file="$1"
    else
	if findfile "$base - " "$1" >/dev/null; then
	    ep="$1"
	else
	    nextep=y
	    base="$base $1"
	fi
    fi
elif [ $# -eq 2 ]; then
    if findfile "$base - " "$1" "$2" >/dev/null; then
	ep="$1"
	tqual="$2"
    else
	base="$base $1"
	ep="$2"
    fi
else
    base="$base $1"
    ep="$2"
    tqual="$3"
fi
if [ "$ep" = . ]; then nextep=y; fi
if [ "$nextep" = y -a -r nextep ]; then
    ep="$(<nextep)"
    if ! isnum "$ep"; then
	echo "planime: nextep is non-numeric" >&2
	exit 1
    fi
fi
file="$(findfile "$base - " "$ep" "$qual")"

if [ -z "$file" ]; then
    echo "planime: no matching file found" >&2
    exit 1
fi

echo "$file"
exit 0

if [ ! -r "$ep" ]; then
    if [ -z "$qual" ]; then
	ep="$(basename "$(pwd)") - ${ep}"
    else
	ep="$(basename "$(pwd)") ${qual} - ${ep}"
    fi
    if [ -r "${ep}.ogm" ]; then
	ep="${ep}.ogm"
	defopts=(-aid 1 -sid 0)
    elif [ -r "${ep}.mkv" ]; then
	ep="${ep}.mkv"
	defopts=(-slang eng -alang jpn)
    elif [ -r "${ep}.mpg" ]; then
	ep="${ep}.mpg"
    elif [ -r "${ep}.mp4" ]; then
	ep="${ep}.mp4"
    elif [ -r "${ep}.avi" ]; then
	ep="${ep}.avi"
    fi
fi

if [ ! -r "$ep" ]; then
    echo "no such episode: $ep" >&2
    exit 1
fi

ifile=".${ep}.info"

if [ -n "$savepar" ]; then
    if [ -r "$ifile" ]; then
	egrep -v "^${savepar}:" "$ifile" >"$ifile.new"
	mv -f "$ifile.new" "$ifile"
    fi
    echo "$savepar: $saveval" >>"$ifile"
    exit 0
fi

unset delay

if [ -r "$ifile" ]; then
    delay="`sed -n 's/delay *: *\([^ ]*\)$/\1/p' <"$ifile"`"
    cmdline=("${cmdline[@]}" -delay "$delay")
else
    cmdline=("${cmdline[@]}" "${defopts[@]}")
fi

if [ "`hostname`" = pc6 ]; then chwp=y; fi

if [ "$chwp" = y ]; then (sleep 2; randomwp) & fi
"${cmdline[@]}" "$ep"