#!/bin/sh

action="$1"
node="$2"
value="$3"

# Validate there's an argument
if [ -z "$value" ]; then
    echo "Usage: $0 <set-volume|set-mute> <node> <value>"
    exit 2
fi

get_node_id() {
    if [[ "$1" == @* ]]; then
        echo $1
        return
    fi

    pw-dump | jq --arg DESCR "$1" --arg CLASS "$2" '.[]
        | select(.info.props["media.class"] == $CLASS)
        | select(.info.props["node.description"] == $DESCR)
        | .id'

    #pw-dump | jq -r --arg CLASS "Audio/Sink" --arg DESCR "$descr" "$jq_filter"
}

format_volume() {
  local s="$1"
  case "$s" in
    +*)  # leading plus
      printf "%s%%+\n" "${s#+}" ;;
    -*)  # leading minus
      printf "%s%%-\n" "${s#-}" ;;
    *)   # no sign
      printf "%s%%+\n" "$s" ;;
  esac
}

case "$action" in
    "set-volume")
        id=$(get_node_id $node "Audio/Sink")
        volume=$(format_volume $value)
        # echo "id $id of node $node -> $volume"
        if [ -n $id ]; then
            wpctl set-volume -l 1.0 $id $volume
        fi
        ;;

    "set-mute")
        id=$(get_node_id $node "Audio/Sink")
        #echo "id $id of node $node"
        wpctl set-mute $id $value
        status=$(wpctl get-volume $id | grep -o 'MUTED')
        if [ -z "$status" ]; then
            echo -e "OPEN"
        else
            echo -e "MUTED"
        fi
        ;;
    *)
        echo "Unknown command: $value"
        ;;
esac