#!/bin/bash

truncate_string() {
  local input="$1"
  local max_length="$2"
  if [ "${#input}" -gt "$max_length" ]; then
    echo "${input:0:$((max_length - 2))}.."
  else
    echo "$input"
  fi
}

filter() {
  if ps -C mpd >/dev/null 2>&1; then
    screen_width=$(xrandr | grep '\*' | awk '{print $1}' | cut -d'x' -f1)
    artist=$(mpc current -f %artist%)
    title=$(mpc current -f %title%)

    if [ "$screen_width" -le 2048 ]; then
      max_length=$((screen_width / 100))
      artist=$(truncate_string "$artist" "$max_length")
      title=$(truncate_string "$title" "$max_length")
    else
      artist="$(mpc current -f %artist%)"
      title="$(mpc current -f %title%)"
    fi

    case "$(mpc status %state%)" in
    "playing") prefix="🎵" ;;
    "paused") prefix="⏸" ;;
    *) return ;;
    esac

    indicators=""
    [ "$(mpc status %single%)" = "on" ] && indicators="${indicators}🔀"
    [ "$(mpc status %random%)" = "on" ] && indicators="${indicators}🔂"
    [ "$(mpc status %repeat%)" = "on" ] && indicators="${indicators}🔁"

    sig=$(grep "${0##*/}" "${XDG_SOURCES_HOME:-${HOME}/.local/src}/suckless/dwmblocks/config.h" | awk -F',' '{print $3}')
    case $sig in
    *0*)
      echo "$prefix$artist - $title$([ -n "$indicators" ] && echo "$indicators")"
      ;;
    *1*)
      echo "$prefix$artist - $title $(mpc status %currenttime%)/$(mpc status %totaltime%)$([ -n "$indicators" ] && echo "$indicators")"
      ;;
    esac
  fi
}

[ "$(grep "${0##*/}" "${XDG_SOURCES_HOME:-${HOME}/.local/src}/suckless/dwmblocks/config.h" | awk -F',' '{print $3}')" -eq 0 ] && {
  pidof -x sb-mpdup >/dev/null 2>&1 || sb-mpdup >/dev/null 2>&1 &
}

# Handling interaction based on button press
case $BLOCK_BUTTON in
1) # left click, opens ncmpcpp
  mpc status | filter
  setsid -f "$TERMINAL" -e ncmpcpp
  ;;
2) mpc toggle | filter ;; # middle click, pause/unpause
3)                        # right click
  notify-send "🎵 Music module" "\- Shows mpd song playing and status
- 🎵 if playing
- ⏸ if paused
- 🔂 if single on
- 🔁 if repeat on
- 🔀 if random on
- Left click opens ncmpcpp
- Middle click pauses/unpause
- Scroll changes track"
  notify-send "🎵 $(mpc current)" "⏭️ $(mpc queued)"
  ;;
4) mpc prev | filter ;; # scroll up, previous
5) mpc next | filter ;; # scroll down, next
6) setsid -f "$TERMINAL" -e "$EDITOR" "$0" ;;
*) mpc status | filter ;; # default, show current status
esac