#!/bin/sh

LOG_FILE=$([[ ${DEBUG_SCREENRECORDER:-false} == "true" ]] && echo "/tmp/screenrecord.log" || echo "/dev/null")

usage() {
  echo "Usage: screen-recorder stop | screen-recorder [-a] [-m region|monitor|window] -o <output_filename>" >&2
}

if [ "$#" -eq 1 ] && [ "$1" = stop ]; then
  pkill -SIGINT -f "gpu-screen-recorder"

  count=0
  while pgrep -f "gpu-screen-recorder" >/dev/null && ((count < 50)); do
    sleep 0.1
    count=$((count + 1))
  done

  if pgrep -f "gpu-screen-recorder" >/dev/null; then
    pkill -9 -f "gpu-screen-recorder"
  fi
  notify-send "Screen Recorder" "Recording stopped" -t 2000
  exit $?
fi

if pgrep -f "gpu-screen-recorder" >/dev/null; then
  notify-send "Screen Recorder" "Recording is already in progress" -t 2000
  exit 1
fi

mode=monitor
output_filename="/tmp/output.mp4"
audio_args=()
while getopts ":am:o:h" opt; do
  case "$opt" in
    a) audio_args=(-a default_input -ac aac) ;;
    m) mode=$OPTARG ;;
    o) output_filename=$OPTARG ;;
    h) usage; exit 0 ;;
    :) usage; exit 1 ;;
    \?) usage; exit 1 ;;
  esac
done
shift $((OPTIND - 1))

if [ "$#" -ne 0 ] || [ -z "$output_filename" ]; then
  usage
  exit 1
fi

script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
recorder=$(PATH=$(printf '%s' "$PATH" | awk -v RS=: -v ORS=: -v script_dir="$script_dir" '$0 != script_dir') command -v gpu-screen-recorder)
if [ -z "$recorder" ]; then
  echo "gpu-screen-recorder executable not found" >&2
  exit 1
fi

capture_args=()
case "$mode" in
  monitor)
    target=$(hyprctl monitors -j | jq -r '.[] | select(.focused == true) | .name')
    [ -n "$target" ] || exit 1
    capture_args=(-w "$target")
    ;;
  region)
    target=$(slurp -f '%wx%h+%x+%y') || exit 1
    [ -n "$target" ] || exit 1
    capture_args=(-w region -region "$target")
    ;;
  window)
    target=$(hyprctl clients -j |
      jq -r '.[] | select(.mapped == true and .hidden == false and .at != null and .size != null) | "\(.at[0]),\(.at[1]) \(.size[0])x\(.size[1]) \((.title // .class // "window") | gsub("[\\r\\n]"; " "))"' |
      slurp -r) || exit 1
    [ -n "$target" ] || exit 1
    capture_args=(-w region -region "$target")
    ;;
  *)
    echo "Invalid mode: $mode" >&2
    usage
    exit 1
    ;;
esac

exec "$recorder" "${capture_args[@]}" "${audio_args[@]}" -k auto -f 60 -fm cfr -fallback-cpu-encoding yes -o "$output_filename" 2>>"$LOG_FILE" &