#!/usr/bin/env bash

change="$1"

if [ -z "$change" ]; then
    echo "Usage: $0 [+5%|-5%|50%]"
    exit 1
fi

echo "=== Deezer Volume Debug (FIXED) ==="

# 1) Deezer window PID
root_pid=$(hyprctl clients -j | jq -r '.[] | select(.class == "deezer-desktop") | .pid' | head -n1)
echo "[INFO] Deezer window PID: $root_pid"

if [ -z "$root_pid" ] || [ "$root_pid" = "null" ]; then
    echo "[ERROR] Deezer window not found."
    exit 1
fi

# 2) Gather ALL descendant PIDs
declare -a pid_array
pid_array+=("$root_pid")

# Direct children
children=($(pgrep -P "$root_pid"))
echo "[INFO] Children: ${children[*]}"

for c in "${children[@]}"; do
    pid_array+=("$c")
    gc=($(pgrep -P "$c"))
    echo "[INFO] Grandchildren of $c: ${gc[*]}"
    for g in "${gc[@]}"; do
        pid_array+=("$g")
    done
done

echo "[INFO] All collected PIDs: ${pid_array[*]}"

echo "----------------------------------"
echo "[INFO] Checking sink inputs..."
echo "----------------------------------"

sink=""

while IFS= read -r block; do
    pid=$(echo "$block" | jq -r '.properties["application.process.id"] // empty')
    index=$(echo "$block" | jq -r '.index')

    echo "[SINK] index=$index pid=$pid"

    [ -z "$pid" ] && { echo "  -> Skipping"; continue; }

    for candidate in "${pid_array[@]}"; do
        if [ "$pid" = "$candidate" ]; then
            echo "  -> MATCH with PID $candidate"
            sink="$index"
            break 2
        fi
    done

    echo "  -> No match"

done < <(pactl -f json list sink-inputs | jq -c '.[]')

echo "----------------------------------"

if [ -z "$sink" ]; then
    echo "[ERROR] No audio stream found for Deezer."
    exit 1
fi

echo "[INFO] Deezer sink index: $sink"
echo "[INFO] Applying: $change"

pactl set-sink-input-volume "$sink" "$change"