#!/bin/bash
# GifTag Medya Helper - macOS
# Usage: chmod +x giftag_medya.command && ./giftag_medya.command

set +e

SID="mac_helper"
BASE_URL="${GIFTAG_ESP_URL:-}"
LAST_KEY=""

normalize_url() {
  local value="$1"
  [ -z "$value" ] && return
  case "$value" in
    http://*|https://*) printf "%s" "${value%/}" ;;
    *) printf "http://%s" "${value%/}" ;;
  esac
}

test_giftag() {
  local url="$1"
  curl -fsS --max-time 2 "$url/api/now_playing_status" >/dev/null 2>&1 || \
  curl -fsS --max-time 2 "$url/api/info" >/dev/null 2>&1
}

resolve_giftag() {
  local candidates=()
  [ -n "$BASE_URL" ] && candidates+=("$(normalize_url "$BASE_URL")")
  candidates+=("http://giftag.local" "http://192.168.4.1")

  for candidate in "${candidates[@]}"; do
    if test_giftag "$candidate"; then
      printf "%s" "$candidate"
      return 0
    fi
  done

  echo "GifTag ESP bulunamadi. ESP URL/IP girin (ornek: http://192.168.1.50):" >&2
  read -r manual
  manual="$(normalize_url "$manual")"
  if [ -n "$manual" ] && test_giftag "$manual"; then
    printf "%s" "$manual"
    return 0
  fi
  return 1
}

json_string() {
  if command -v python3 >/dev/null 2>&1; then
    python3 -c 'import json,sys; print(json.dumps(sys.stdin.read().rstrip("\n")))' 2>/dev/null
  else
    sed 's/\\/\\\\/g; s/"/\\"/g; s/^/"/; s/$/"/'
  fi
}

get_spotify() {
  osascript <<'APPLESCRIPT'
if application "Spotify" is running then
  tell application "Spotify"
    if player state is playing or player state is paused then
      set t to name of current track
      set a to artist of current track
      set al to album of current track
      set p to player position
      set d to duration of current track
      set s to player state as text
      return t & linefeed & a & linefeed & al & linefeed & p & linefeed & d & linefeed & s
    end if
  end tell
end if
APPLESCRIPT
}

get_music() {
  osascript <<'APPLESCRIPT'
if application "Music" is running then
  tell application "Music"
    if player state is playing or player state is paused then
      set t to name of current track
      set a to artist of current track
      set al to album of current track
      set p to player position
      set d to duration of current track
      set s to player state as text
      return t & linefeed & a & linefeed & al & linefeed & p & linefeed & d & linefeed & s
    end if
  end tell
end if
APPLESCRIPT
}

BASE_URL="$(resolve_giftag)" || {
  echo "GifTag ESP'ye baglanilamadi." >&2
  exit 1
}
echo "GifTag Medya helper calisiyor: $BASE_URL"

while true; do
  DATA="$(get_spotify)"
  [ -z "$DATA" ] && DATA="$(get_music)"

  if [ -n "$DATA" ]; then
    TITLE="$(printf "%s" "$DATA" | sed -n '1p')"
    ARTIST="$(printf "%s" "$DATA" | sed -n '2p')"
    ALBUM="$(printf "%s" "$DATA" | sed -n '3p')"
    POS="$(printf "%s" "$DATA" | sed -n '4p')"
    DUR="$(printf "%s" "$DATA" | sed -n '5p')"
    STATE="$(printf "%s" "$DATA" | sed -n '6p')"
    POS_MS="$(awk "BEGIN { printf \"%d\", ($POS) * 1000 }")"
    DUR_MS="$(awk "BEGIN { printf \"%d\", ($DUR) }")"
    PLAYING="false"
    [ "$STATE" = "playing" ] && PLAYING="true"
    KEY="$TITLE|$ARTIST|$ALBUM|$DUR_MS|$PLAYING"

    JSON="{\"source_id\":\"$SID\",\"source_name\":\"GifTag macOS Helper\",\"title\":$(printf "%s" "$TITLE" | json_string),\"artist\":$(printf "%s" "$ARTIST" | json_string),\"album\":$(printf "%s" "$ALBUM" | json_string),\"position_ms\":$POS_MS,\"duration_ms\":$DUR_MS,\"is_playing\":$PLAYING,\"media_key\":$(printf "%s" "$KEY" | json_string)}"
    ENDPOINT="/api/now_playing_tick"
    [ "$KEY" != "$LAST_KEY" ] && ENDPOINT="/api/now_playing"
    curl -fsS --max-time 3 -X POST "$BASE_URL$ENDPOINT" -H "Content-Type: application/json" --data "$JSON" >/dev/null 2>&1
    LAST_KEY="$KEY"
  fi

  sleep 2
done