#!/bin/sh
#
# Copyright (c) 2019  Aaron LI
# MIT License
#

# Default font and size
fontname=NotoSansMono-Regular
fontsize=11

usage() {
    echo "usage: ${0##*/} [-f [fontname][:fontsize]] [acme_args ...]" >&2
    echo "defaults: fontname: '${fontname}', fontsize: ${fontsize}" >&2
    exit 1
}

is_running() {
    pgrep -x -u "${USER}" "$1" >/dev/null 2>&1
}

get_font() {
    local name size
    case $1 in
    *:*)
        name="${1%:*}"
        size="${1#*:}"
        ;;
    *)
        name="$1"
        ;;
    esac
    name="${name:-$2}"
    size="${size:-$3}"
    echo "/mnt/font/${name}/${size}a/font"
}

[ -n "${PLAN9}" ] || {
    echo "ERROR: Environment variable 'PLAN9' not set!" >&2
    exit 2
}

while getopts :f:h opt; do
    case ${opt} in
    f)
        font="${OPTARG}"
        ;;
    h)
        usage
        ;;
    \?)
        echo "Invalid option -${OPTARG}" >&2
        usage
        ;;
    :)
        echo "Option -${OPTARG} requires an argument" >&2
        usage
        ;;
    esac
done
shift $((${OPTIND} - 1))

FONT=$(get_font "${font}" ${fontname} ${fontsize})

is_running fontsrv || fontsrv &
is_running plumber || plumber

export TERM=dumb
export SHELL="${PLAN9}/bin/rc"
export PAGER="${PLAN9}/bin/nobs"

exec ${PLAN9}/bin/acme -a -f "${FONT}" "$@"