#!/bin/bash

error() {
    echo "error: $@"
    exit 1
}

installed() {
    command -v "$1" > /dev/null
    return $?
}

get_deadbeef() {
    if [[ "$OSTYPE" == "darwin"* ]]; then
        echo "/Applications/DeaDBeeF.app/Contents/MacOS/DeaDBeeF"
    else
        echo deadbeef
    fi
}

tempdir() {
    for TMPDIR in "$TMPDIR" "$TMP" /var/tmp /tmp; do
        test -d "$TMPDIR" && echo "$TMPDIR" && break
    done
}

download() {
    local source="$1"
    local target="$2"

    if installed curl; then
        curl -o "$target" "$source"
    elif installed wget; then
        wget -O "$target" "$source"
    fi
}

usage() {
    echo "$NAME v$VERSION"
    echo
    echo "usage: $NAME <magnet or torrent>"
    exit
}

tempname() {
    echo $(tempdir)/$(uuidgen).m3u
}

VERSION="0.3"
NAME="peerflix-deadbeef"
DEADBEEF="$(get_deadbeef)"

[ -z "$1" ] && usage

installed "$DEADBEEF" || error "$DEADBEEF is not found"
installed peerflix || error "peerflix is not found in PATH"
installed curl || installed wget || error "curl or wget is required"

if [[ "$1" == "--ready" ]]; then
    host="$2"
    port="$3"
    file=$(tempname)
    url="http://$host:$port/.m3u"

    usleep 100000
    download "$url" "$file"
    $DEADBEEF "$file" &

    sleep 3
    rm "$file"
else
    host="127.0.0.1"
    port=$(( ( RANDOM % 10000 ) + 10000 ))

    peerflix "$1" -ardh $host -p $port --on-listening "$0 --ready $host $port"
fi