#!/bin/bash

###################################################################
#Script Name    :music_bar
#Description    :polybar module for displaying music bar
#Args           :
#Author         :unixsilk
#Email          :
###################################################################

function check_if_something_plays() {

    no_player=$(playerctl status 2>&1)
    if [ "${no_player}" == "No players found" ]; then
        exit # Exit the entire script without any further output
    fi

}

check_if_something_plays

find_playing_player() {

    for each_player in $(playerctl -l); do
        status=$(playerctl -p "${each_player}" status)
        if [ "${status}" == "Playing" ]; then
            player="${each_player}"
            break
        else
            exit
        fi
    done

}

find_string_length() {

    grab_artist=$(playerctl -p "${player}" metadata artist)
    grab_title=$(playerctl -p "${player}" metadata title)

    combined_length=$((${#grab_artist} + ${#grab_title}))

    if [[ ${combined_length} -ge 55 ]]; then
        length="greater"
    else
        length="lesser"
    fi

}

function set_timestamps() {

    current_duration=$(playerctl -p "${player}" metadata --format '{{duration(position)}}')
    total_duration=$(playerctl -p "${player}" metadata --format '{{duration(mpris:length)}}')

}

function print_firefox_bar_moving() {

    title_string_length=${#grab_title}

    counter=0

    for ((each = 0; each <= title_string_length; each++)); do
        echo -e "${begin_white}""" "${grab_artist:0:15}" "•" "${end_color}""${grab_title:counter:55}"
        ((counter++))
        sleep 0.19
    done

}

function print_firefox_bar_static() {
    echo "${begin_white}""" "${grab_artist}" "•" "${end_color}""${grab_title}"

}

function print_other_player_bar_moving() {

    title_string_length=${#grab_title}

    counter=0

    for ((each = 0; each <= title_string_length; each++)); do
        set_timestamps
        echo -e "${begin_yellow}""${current_duration}""/""${total_duration}" "${begin_white}""" "${grab_artist:0:15}" "•" "${end_color}""${grab_title:counter:40}"
        ((counter++))
        sleep 0.19
    done
}

function print_other_player_bar_static() {

    echo -e "${begin_yellow}""${current_duration}""/""${total_duration}" "${end_color}""${begin_white}""" "${grab_artist:0:9}" "•" "${end_color}""${grab_title}"

}

function define_colors() {

    begin_yellow="%{F#F0C674}"
    begin_white="%{F#FFFFFF}"
    end_color="%{F-}"
}

#Find which player is playing currently and define that as variable $player
find_playing_player

#find the string length of title and artist
find_string_length

#invoke ANSI colors for Polybar
define_colors

combine_values="${player}-${length}"

case "${combine_values}" in
firefox*-greater)
    print_firefox_bar_moving
    ;;
firefox*-lesser)
    print_firefox_bar_static
    ;;
*-greater)
    set_timestamps
    print_other_player_bar_moving
    ;;
*-lesser)
    set_timestamps
    print_other_player_bar_static
    ;;
*)
    exit
    ;;
esac