#!/bin/sh
# Checks the $names file for twitch names and checks if the channel is live and shows a dmenu of live channels.
# Depends on: streamlink/youtube-dl, mpv, dmenu, twitch-get

# File paths
TWITCH_NAMES=${XDG_CONFIG_HOME:-$HOME/.config}/twitch/names
TWITCH_LIVE=${XDG_CACHE_HOME:-$HOME/.cache}/twitch/live

_helpinfo() {
	cat <<-_EOF
Usage:
     twitch [ OPTION [...] ]

Options:
     -a: 	Adds name to the list
     -e:	Opens the list in ${EDITOR:-vi}
     -t:	Shows the top streamers
     -l:	Show the list that will be checked
     -f:	Force update
     -h:	Show help
	_EOF
}

mkdir -p "${XDG_CONFIG_HOME:-$HOME/.config/share}/twitch" "${XDG_CACHE_HOME:-$HOME/.cache}/twitch"

# check filedate for the downloaded file
[ -e "$TWITCH_LIVE" ] && filedate=$((`date +%s`-`stat -c%Y $TWITCH_LIVE`)) || filedate=61
[ "$filedate" -gt 60 ] && send=true || send=false

#check if options are being parsed
while getopts "aetlfh" OPT; do
    case "$OPT" in
	h) _helpinfo; exit 0;;
	f) send=true; shift;;
	t) arg=top; send=true shift;;
	e) ${EDITOR:-vi} $TWITCH_NAMES; exit 0;;
	l) cat $TWITCH_NAMES; exit 0;;
	a) grep "$2" $TWITCH_NAMES >/dev/null && \
	   echo "$2 is already added" && exit 1 || \
	   echo "$2" >> $TWITCH_NAMES ; exit 0;;
	*) ;;
    esac
done

# Check if there is a standard input and use it.
#[ ! -t 0 ] && [ -s /dev/stdin ] && TWITCH_NAMES=/dev/stdin && send=true

# Get streamers that are live
[ $send = true ] && twitch.py $arg > "$TWITCH_LIVE"

# Use streamlink if installed, but fallback to mpv
command -v streamlink >/dev/null && \
	TWITCH_PLAYER="streamlink --default-stream=best --verbose-player" || \
	TWITCH_PLAYER=mpv

# Have a fallback if dmenu is not installed
command -v dmenu >/dev/null && \
	MENUER='dmenu -sb #8041DE' || MENUER="fzf"

# Use fzf if in a ssh session
[ -n "$SSH_TTY" ] && command -v fzf >/dev/null && MENUER="fzf"

#Checks if program is piped into a shell and print output to program
if [ -p /dev/stdout ]; then cat "$TWITCH_LIVE"; else
	$MENUER < "$TWITCH_LIVE" | xargs -I{} $TWITCH_PLAYER https://twitch.tv/{};
fi