import { wsManager } from "../utils/websocket.js";
import { authenticate } from "../middleware/auth.js";

/**
 * WebSocket routes and handlers
 * @param {FastifyInstance} fastify - Fastify instance
 */
export default async function websocketRoutes(fastify, options) {
  // WebSocket endpoint
  fastify.get("/ws", { websocket: true }, (connection, request) => {
    // In @fastify/websocket, the connection parameter IS the WebSocket directly
    // It has properties like _socket, _readyState, etc.
    wsManager.handleConnection(connection, request.raw || request);
  });

  // Get WebSocket stats (authenticated endpoint)
  fastify.get(
    "/ws/stats",
    {
      preHandler: authenticate,
    },
    async (request, reply) => {
      const stats = {
        totalConnections: wsManager.getTotalSocketCount(),
        authenticatedUsers: wsManager.getAuthenticatedUserCount(),
        userConnected: wsManager.isUserConnected(request.user._id.toString()),
      };

      return reply.send({
        success: true,
        stats: stats,
      });
    }
  );

  // Broadcast to all users (admin only - requires staff level 3+)
  fastify.post(
    "/ws/broadcast",
    {
      preHandler: [
        authenticate,
        async (request, reply) => {
          if (request.user.staffLevel < 3) {
            return reply.status(403).send({
              error: "Forbidden",
              message: "Insufficient permissions",
            });
          }
        },
      ],
      schema: {
        body: {
          type: "object",
          required: ["type", "data"],
          properties: {
            type: { type: "string" },
            data: { type: "object" },
            excludeUsers: { type: "array", items: { type: "string" } },
          },
        },
      },
    },
    async (request, reply) => {
      try {
        const { type, data, excludeUsers = [] } = request.body;

        const count = wsManager.broadcastToAll(
          {
            type,
            data,
            timestamp: Date.now(),
          },
          excludeUsers
        );

        return reply.send({
          success: true,
          message: `Broadcast sent to ${count} clients`,
          recipientCount: count,
        });
      } catch (error) {
        console.error("Error broadcasting:", error);
        return reply.status(500).send({
          error: "InternalServerError",
          message: "Failed to broadcast message",
        });
      }
    }
  );

  // Send message to specific user (admin only)
  fastify.post(
    "/ws/send/:userId",
    {
      preHandler: [
        authenticate,
        async (request, reply) => {
          if (request.user.staffLevel < 2) {
            return reply.status(403).send({
              error: "Forbidden",
              message: "Insufficient permissions",
            });
          }
        },
      ],
      schema: {
        body: {
          type: "object",
          required: ["type", "data"],
          properties: {
            type: { type: "string" },
            data: { type: "object" },
          },
        },
      },
    },
    async (request, reply) => {
      try {
        const { userId } = request.params;
        const { type, data } = request.body;

        const sent = wsManager.sendToUser(userId, {
          type,
          data,
          timestamp: Date.now(),
        });

        if (!sent) {
          return reply.status(404).send({
            error: "NotFound",
            message: "User not connected",
          });
        }

        return reply.send({
          success: true,
          message: "Message sent to user",
        });
      } catch (error) {
        console.error("Error sending message:", error);
        return reply.status(500).send({
          error: "InternalServerError",
          message: "Failed to send message",
        });
      }
    }
  );

  // Check if user is online
  fastify.get(
    "/ws/status/:userId",
    {
      preHandler: authenticate,
    },
    async (request, reply) => {
      try {
        const { userId } = request.params;
        const isConnected = wsManager.isUserConnected(userId);
        const metadata = wsManager.getUserMetadata(userId);

        return reply.send({
          success: true,
          userId: userId,
          online: isConnected,
          metadata: metadata || null,
        });
      } catch (error) {
        console.error("Error checking user status:", error);
        return reply.status(500).send({
          error: "InternalServerError",
          message: "Failed to check user status",
        });
      }
    }
  );
}