const API_BASE_URL = window.__ENV__?.API_BASE || window._env_?.VITE_API_URL || import.meta.env.VITE_API_URL || "http://192.168.1.100:8000";

function getAuthHeaders() {
  const token = localStorage.getItem("auth_token");
  return {
    "Content-Type": "application/json",
    ...(token && { Authorization: `Bearer ${token}` }),
  };
}

export async function getNotifications(unreadOnly = false) {
  const url = `${API_BASE_URL}/notifications${unreadOnly ? '?unread_only=true' : ''}`;
  const response = await fetch(url, {
    method: "GET",
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    if (response.status === 401) {
      throw new Error("Unauthorized");
    }
    const errorData = await response.json().catch(() => ({ detail: "Failed to fetch notifications" }));
    throw new Error(errorData.detail || "Failed to fetch notifications");
  }

  return response.json();
}

export async function markNotificationAsRead(notificationId) {
  const response = await fetch(`${API_BASE_URL}/notifications/${notificationId}/read`, {
    method: "PATCH",
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({ detail: "Failed to mark notification as read" }));
    throw new Error(errorData.detail || "Failed to mark notification as read");
  }

  return response.json();
}

export async function markAllNotificationsAsRead() {
  const response = await fetch(`${API_BASE_URL}/notifications/read-all`, {
    method: "PATCH",
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({ detail: "Failed to mark all notifications as read" }));
    throw new Error(errorData.detail || "Failed to mark all notifications as read");
  }

  return response.json();
}

export async function deleteNotification(notificationId) {
  const response = await fetch(`${API_BASE_URL}/notifications/${notificationId}`, {
    method: "DELETE",
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({ detail: "Failed to delete notification" }));
    throw new Error(errorData.detail || "Failed to delete notification");
  }

  return response.json();
}