#!/bin/sh

# Get config values for script
source "${0%/*}/now-playing-options.cfg"

# The name of polybar bar which houses the main spotify module and the control modules.
PARENT_BAR="${1:-music}"
PARENT_BAR_PID=$(pgrep -a "polybar" | grep "$PARENT_BAR" | cut -d" " -f1)

urldecode() { : "${*//+/ }"; echo -e "${_//%/\\x}"; }

send_hook() {
    [ -z "$1" ] && echo "send_hook: missing arg" && exit 1
    polybar-msg -p "$PARENT_BAR_PID" hook mpris-play-pause "$1" 1>/dev/null 2>&1
}


extract_meta() {
    grep "$1\W" <<< "$meta" | awk '{$1=$2=""; print $0}' | sed 's/^ *//; s/; */;/g' | paste -s -d/ -
}

# Truncate strings to passed maximum lengths (arg 1 is relevant string from get_info)
# If the remaining string still has "(" or "[", put the closing parenthesis or bracket after the ...
truncate() {
    tr_result=$(echo "$1" | sed "s/\(.\{$2\}\).*/\1.../")
    if [[ $tr_result == *"("* && $tr_result != *")"* ]]; then
        tr_result="$tr_result)"
	echo "$tr_result"
	return 0
    elif [[ $tr_result == *"["* && $tr_result != *"]"* ]]; then
        tr_result="$tr_result]"
	echo "$tr_result"
	return 0
    #If there are multiple sets of parentheses and the final one is interrupted, make sure the closing parenthesis is still added
    elif [[ $tr_result == *"("*")"*"("* && $tr_result != *"("*")"*"("*")"* ]]; then
	tr_result="$tr_result)"
	echo "$tr_result"
	return 0
    #Should basically never happen, but same thing with brackets
    elif [[ $tr_result == *"["*"]"*"["* && $tr_result != *"["*"]"*"["*"]"* ]]; then
	tr_result="$tr_result]"
	echo "$tr_result"
	return 0
    else
	echo "$tr_result"
	return 0
    fi
}

# if "icon" given, determine icon. otherwise, print metadata
get_info() {
    #if no arguments passed, print correct syntax
    if [ -z "$1" ]; then
        echo "Usage: get_info PLAYER [icon]"
        exit 1
    fi

    meta=$(playerctl -p "$1" metadata)
	
    # get title
    title=$(extract_meta title)
    # if no title, try url e.g. vlc
    if [ -z "$title" ]; then
        title=$(extract_meta url)
        title=$(urldecode "${title##*/}")
    fi
    
    title=$(truncate "$title" "$title_maxlen")
	
    # if not "icon", display information and return
    if [ "$2" != "icon" ]; then
        artist=$(extract_meta artist)
        [ -z "$artist" ] && artist=$(extract_meta albumArtist)
	
        if [ -n "$artist" ]; then
            #truncates artist length to $artist_maxlen in config.cfg
	    artist=$(truncate "$artist" "$artist_maxlen")
	    # only checks album metadata and truncates if $show_album is enabled in config.cfg
	    if [ "$show_album" = "true" ]; then
	        album=$(extract_meta album)
		# If there is an album, truncate it and append icon only if $show_aa_icons is enabled in config .cfg
		[ -n "$album" ] && album=$(truncate "$album" "$album_maxlen") && if [ "$show_aa_icons" = "true" ]; then
	       	    echo -n " $album $separator "
	        else
		    echo -n "$album $separator "
	        fi
	    fi
	    
	    if [ "$show_aa_icons" = "true" ]; then
	        echo -n "ﴁ $artist $separator "
	    else
		echo -n "$artist $separator "
            fi
        fi
        echo "$title"
        return 0
    fi

    # determine icon:
    # if player name is recognised, use it
    case "$1" in
        spotify* | vlc | mpv | rhythmbox) echo "$1";;
        kdeconnect*) echo "kdeconnect";;
        chromium*|firefox*|chrome*)
            # if a browser, search window titles:
            # this tries to avoid title messing up the regex
            regex_title=$(echo "$title" | tr "[:punct:]" ".")
            windowname=$(xdotool search --name --class --classname "$regex_title" getwindowname 2>/dev/null)
            case $windowname in
                "") ;; # ignore if empty
                *Netflix*) echo "netflix";;
                *YouTube*) echo "youtube";;
                *"Prime Video"*) echo "prime";;
                *"Corridor Digital"*) echo "corridor";;
                *) echo "browser";;
            esac;;
        *) echo "none";;
    esac
}

# manually go through players (this is where $1 and $2 are defined for get_info)
read -d'\n' -ra PLAYERS <<<"$(playerctl -l -i "$ignored_players" 2>/dev/null)" # -i ignores players defined in options.cfg
declare -a PAUSED
for player in "${PLAYERS[@]}"; do
    [ "$player" = "playerctld" ] && continue;

    p_status=$(playerctl -p "$player" status 2>/dev/null)

    # if we have one playing, we'll use it and EXIT
    if [ "$p_status" = "Playing"  ]; then
        send_hook 1
        get_info "$player" "$2" 
        exit 0;
    fi

    [ "$p_status" = "Paused" ] && PAUSED+=("$player")
done

# if we have a paused, show it otherwise assume there are no players or have all stopped
if [ -n "${PAUSED[0]}" ]; then
    send_hook 2
    get_info "${PAUSED[0]}" "$2"
else
    [ "$2" = icon ] && echo "none" || echo "" #" 󰒲 Not playing "
fi