#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
WSCRAPER_DIR="$ROOT_DIR/bin/wscraper"
RUNTIME_DIR="$ROOT_DIR/.runtime/wscraper-service"
VENV_DIR="$RUNTIME_DIR/.venv"
PID_FILE="$RUNTIME_DIR/wscraper-service.pid"
LOG_FILE="$RUNTIME_DIR/wscraper-service.log"
MARKER_FILE="$RUNTIME_DIR/.setup-complete"
MODE=""
SKIP_INSTALL="false"
RESTART_WSCRAPER="false"
SKIP_FETCH="false"
UPDATE_WSCRAPER="false"

usage() {
  cat <<'EOF'
Usage:
  ./scripts/bootstrap.sh --dev-mode [--skip-wscraper-fetch] [--update-wscraper] [--skip-wscraper-install] [--restart-wscraper]
  ./scripts/bootstrap.sh --prod-mode [--skip-wscraper-fetch] [--update-wscraper] [--skip-wscraper-install] [--restart-wscraper]
EOF
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    --dev-mode)
      MODE="dev"
      ;;
    --prod-mode)
      MODE="prod"
      ;;
    --skip-wscraper-install)
      SKIP_INSTALL="true"
      ;;
    --skip-wscraper-fetch)
      SKIP_FETCH="true"
      ;;
    --update-wscraper)
      UPDATE_WSCRAPER="true"
      ;;
    --restart-wscraper|--restart)
      RESTART_WSCRAPER="true"
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    *)
      echo "Unknown option: $1" >&2
      usage
      exit 1
      ;;
  esac
  shift
done

if [[ -z "$MODE" ]]; then
  echo "--dev-mode veya --prod-mode zorunlu." >&2
  usage
  exit 1
fi

mkdir -p "$RUNTIME_DIR"

if [[ -f "$ROOT_DIR/.env" ]]; then
  set -a
  # shellcheck disable=SC1091
  source "$ROOT_DIR/.env"
  set +a
fi

WSCRAPER_SERVICE_HOST="${WSCRAPER_SERVICE_HOST:-0.0.0.0}"
WSCRAPER_SERVICE_PORT="${WSCRAPER_SERVICE_PORT:-8787}"
WSCRAPER_SERVICE_TOKEN="${WSCRAPER_SERVICE_TOKEN:-}"
WSCRAPER_SERVICE_PYTHON_BIN="${WSCRAPER_SERVICE_PYTHON_BIN:-}"
WSCRAPER_GIT_URL="${WSCRAPER_GIT_URL:-https://github.com/wisecolt/Bookmark-Tracker.git}"
WSCRAPER_GIT_REF="${WSCRAPER_GIT_REF:-main}"

detect_python_bin() {
  if [[ -n "$WSCRAPER_SERVICE_PYTHON_BIN" ]] && command -v "$WSCRAPER_SERVICE_PYTHON_BIN" >/dev/null 2>&1; then
    echo "$WSCRAPER_SERVICE_PYTHON_BIN"
    return
  fi

  local candidate
  for candidate in python3.12 python3.11 python3.10 python3; do
    if ! command -v "$candidate" >/dev/null 2>&1; then
      continue
    fi
    if "$candidate" -c 'import sys; raise SystemExit(0 if sys.version_info >= (3, 10) else 1)' >/dev/null 2>&1; then
      echo "$candidate"
      return
    fi
  done

  echo "q-buffer watcher icin Python 3.10+ gerekli." >&2
  exit 1
}

PYTHON_BIN="$(detect_python_bin)"

ensure_wscraper_repo() {
  if [[ "$SKIP_FETCH" == "true" ]]; then
    echo "wscraper repo kontrolu atlandi."
    return
  fi

  if [[ ! -d "$WSCRAPER_DIR" ]]; then
    echo "wscraper repo klonlaniyor..."
    git clone --branch "$WSCRAPER_GIT_REF" "$WSCRAPER_GIT_URL" "$WSCRAPER_DIR"
    return
  fi

  if [[ ! -d "$WSCRAPER_DIR/.git" ]]; then
    echo "bin/wscraper dizini var ama git reposu degil. Lutfen duzeltin veya dizini temizleyin." >&2
    exit 1
  fi

  if [[ "$UPDATE_WSCRAPER" != "true" ]]; then
    echo "wscraper repo mevcut, yeniden klonlanmayacak."
    return
  fi

  local status_output
  status_output="$(git -C "$WSCRAPER_DIR" status --porcelain)"
  if [[ -n "$status_output" ]]; then
    echo "wscraper repo kirli durumda; --update-wscraper uygulanmadi." >&2
    echo "Lutfen bin/wscraper icindeki degisiklikleri commit edin veya temizleyin." >&2
    exit 1
  fi

  echo "wscraper repo guncelleniyor..."
  git -C "$WSCRAPER_DIR" pull --ff-only
}

validate_wscraper_repo() {
  local expected_paths=(
    "$WSCRAPER_DIR/pyproject.toml"
    "$WSCRAPER_DIR/setup.py"
    "$WSCRAPER_DIR/src/wscraper/cli.py"
  )
  local path
  for path in "${expected_paths[@]}"; do
    if [[ ! -e "$path" ]]; then
      echo "wscraper repo eksik veya bozuk gorunuyor: $path bulunamadi." >&2
      exit 1
    fi
  done
}

service_running() {
  if [[ ! -f "$PID_FILE" ]]; then
    return 1
  fi
  local pid
  pid="$(cat "$PID_FILE")"
  if [[ -z "$pid" ]]; then
    return 1
  fi
  if kill -0 "$pid" >/dev/null 2>&1; then
    return 0
  fi
  rm -f "$PID_FILE"
  return 1
}

install_wscraper_service() {
  if [[ "$SKIP_INSTALL" == "true" ]]; then
    echo "wscraper kurulum kontrolu atlandi."
    return
  fi

  local needs_install="false"
  if [[ ! -x "$VENV_DIR/bin/python3" ]]; then
    needs_install="true"
  elif [[ ! -f "$MARKER_FILE" ]]; then
    needs_install="true"
  elif ! "$VENV_DIR/bin/python3" -c "import scrapling" >/dev/null 2>&1; then
    needs_install="true"
  fi

  if [[ "$needs_install" == "false" ]]; then
    echo "wscraper kurulumu mevcut, tekrar kurulmayacak."
    return
  fi

  echo "wscraper host servisi kuruluyor..."
  rm -rf "$VENV_DIR"
  "$PYTHON_BIN" -m venv "$VENV_DIR"
  "$VENV_DIR/bin/pip" install --upgrade pip
  "$VENV_DIR/bin/pip" install "scrapling[fetchers]==0.4.1"
  "$VENV_DIR/bin/scrapling" install
  touch "$MARKER_FILE"
}

stop_wscraper_service() {
  if ! service_running; then
    return
  fi
  local pid
  pid="$(cat "$PID_FILE")"
  echo "wscraper-service durduruluyor (pid=$pid)..."
  kill "$pid" >/dev/null 2>&1 || true
  rm -f "$PID_FILE"
}

start_wscraper_service() {
  if service_running && [[ "$RESTART_WSCRAPER" != "true" ]]; then
    echo "wscraper-service zaten calisiyor."
    return
  fi

  if [[ "$RESTART_WSCRAPER" == "true" ]]; then
    stop_wscraper_service
  fi

  echo "wscraper-service baslatiliyor..."
  nohup env \
    WSCRAPER_SERVICE_HOST="$WSCRAPER_SERVICE_HOST" \
    WSCRAPER_SERVICE_PORT="$WSCRAPER_SERVICE_PORT" \
    WSCRAPER_SERVICE_TOKEN="$WSCRAPER_SERVICE_TOKEN" \
    PYTHONPATH="$WSCRAPER_DIR/src" \
    "$VENV_DIR/bin/python3" \
    "$ROOT_DIR/bin/wscraper-service/server.py" \
    >>"$LOG_FILE" 2>&1 &
  echo $! > "$PID_FILE"

  local health_url="http://127.0.0.1:${WSCRAPER_SERVICE_PORT}/health"
  for _ in $(seq 1 20); do
    if [[ -n "$WSCRAPER_SERVICE_TOKEN" ]]; then
      if curl -fsS -H "Authorization: Bearer ${WSCRAPER_SERVICE_TOKEN}" "$health_url" >/dev/null 2>&1; then
        echo "wscraper-service hazir."
        return
      fi
    elif curl -fsS "$health_url" >/dev/null 2>&1; then
      echo "wscraper-service hazir."
      return
    fi
    sleep 1
  done

  echo "wscraper-service health-check basarisiz. Log: $LOG_FILE" >&2
  exit 1
}

run_docker() {
  if [[ "$MODE" == "dev" ]]; then
    docker compose -f "$ROOT_DIR/docker-compose.dev.yml" up --build
    return
  fi
  docker compose -f "$ROOT_DIR/docker-compose.yml" up --build -d
}

ensure_wscraper_repo
validate_wscraper_repo
install_wscraper_service
start_wscraper_service
run_docker