const { admin } = require("../firebase/firebase-handler");
const { MARK_MESSAGES_AS_READ, GET_CONVERSATIONS, GET_CONVERSATION_DETAILS } = require("../graphql-client/queries");
const { phone } = require("phone");
const { client: gqlClient } = require("../graphql-client/graphql-client");
const queries = require("../graphql-client/queries");
const twilio = require("twilio");
const client = require("../graphql-client/graphql-client").client;

const twilioClient = twilio(process.env.TWILIO_AUTH_TOKEN, process.env.TWILIO_AUTH_KEY);

const redisSocketEvents = ({
  io,
  redisHelpers: { setSessionData, clearSessionData }, // Note: Used if we persist user to Redis
  ioHelpers: { getBodyshopRoom },
  logger
}) => {
  // Logging helper functions
  const createLogEvent = (socket, level, message) => {
    logger.log("ioredis-log-event", level, socket?.user?.email, null, { wsmessage: message });
  };

  // Socket Auth Middleware
  const authMiddleware = (socket, next) => {
    try {
      if (socket.handshake.auth.token) {
        admin
          .auth()
          .verifyIdToken(socket.handshake.auth.token)
          .then((user) => {
            socket.user = user;
            // Note: if we ever want to capture user data across sockets
            // Uncomment the following line and then remove the next() to a second then()
            // return setSessionData(socket.id, "user", user);
            next();
          })
          .catch((error) => {
            next(new Error(`Authentication error: ${error.message}`));
          });
      } else {
        next(new Error("Authentication error - no authorization token."));
      }
    } catch (error) {
      logger.log("websocket-connection-error", "error", null, null, {
        ...error
      });
      next(new Error(`Authentication error ${error}`));
    }
  };

  // Register Socket Events
  const registerSocketEvents = (socket) => {
    // Uncomment for further testing
    // createLogEvent(socket, "debug", `Registering RedisIO Socket Events.`);

    // Token Update Events
    const registerUpdateEvents = (socket) => {
      const updateToken = async (newToken) => {
        try {
          // noinspection UnnecessaryLocalVariableJS
          const user = await admin.auth().verifyIdToken(newToken, true);
          socket.user = user;

          // If We ever want to persist user Data across workers
          // await setSessionData(socket.id, "user", user);

          // Uncomment for further testing
          // createLogEvent(socket, "debug", "Token updated successfully");

          socket.emit("token-updated", { success: true });
        } catch (error) {
          if (error.code === "auth/id-token-expired") {
            createLogEvent(socket, "warn", "Stale token received, waiting for new token");
            socket.emit("token-updated", {
              success: false,
              error: "Stale token."
            });
          } else {
            createLogEvent(socket, "error", `Token update failed: ${error.message}`);
            socket.emit("token-updated", { success: false, error: error.message });
            // For any other errors, optionally disconnect the socket
            socket.disconnect();
          }
        }
      };
      socket.on("update-token", updateToken);
    };
    // Room Broadcast Events
    const registerRoomAndBroadcastEvents = (socket) => {
      const joinBodyshopRoom = (bodyshopUUID) => {
        try {
          const room = getBodyshopRoom(bodyshopUUID);
          socket.join(room);
          // createLogEvent(socket, "debug", `Client joined bodyshop room: ${room}`);
        } catch (error) {
          createLogEvent(socket, "error", `Error joining room: ${error}`);
        }
      };

      const leaveBodyshopRoom = (bodyshopUUID) => {
        try {
          const room = getBodyshopRoom(bodyshopUUID);
          socket.leave(room);
          createLogEvent(socket, "debug", `Client left bodyshop room: ${room}`);
        } catch (error) {
          createLogEvent(socket, "error", `Error joining room: ${error}`);
        }
      };

      const broadcastToBodyshopRoom = (bodyshopUUID, message) => {
        try {
          const room = getBodyshopRoom(bodyshopUUID);
          io.to(room).emit("bodyshop-message", message);
          // We do not need this as these can be debugged live
          // createLogEvent(socket, "debug", `Broadcast message to bodyshop ${room}`);
        } catch (error) {
          createLogEvent(socket, "error", `Error getting room: ${error}`);
        }
      };

      socket.on("join-bodyshop-room", joinBodyshopRoom);
      socket.on("leave-bodyshop-room", leaveBodyshopRoom);
      socket.on("broadcast-to-bodyshop", broadcastToBodyshopRoom);
    };

    // Disconnect Events
    const registerDisconnectEvents = (socket) => {
      const disconnect = () => {
        // Uncomment for further testing
        // createLogEvent(socket, "debug", `User disconnected.`);

        const rooms = Array.from(socket.rooms).filter((room) => room !== socket.id);
        for (const room of rooms) {
          socket.leave(room);
        }
        // If we ever want to persist the user across workers
        // clearSessionData(socket.id);
      };

      socket.on("disconnect", disconnect);
    };
    // Messaging Events
    const registerMessagingEvents = (socket) => {
      const openMessaging = async (bodyshopUUID) => {
        try {
          const conversations = await client.request(GET_CONVERSATIONS, { bodyshopId: bodyshopUUID });
          socket.emit("messaging-list", { conversations });
        } catch (error) {
          logger.log("error", "Failed to fetch conversations", error);
          socket.emit("error", { message: "Failed to fetch conversations" });
        }
      };

      const joinConversation = async (conversationId) => {
        try {
          const room = `conversation-${conversationId}`;
          socket.join(room);

          // Fetch conversation details and messages
          const data = await client.request(GET_CONVERSATION_DETAILS, { conversationId });
          socket.emit("conversation-details", data); // Send data to the client
        } catch (error) {
          logger.log("error", "Failed to join conversation", error);
          socket.emit("error", { message: "Failed to join conversation" });
        }
      };

      const markAsRead = async ({ conversationId, userId, imexshopid, bodyshopId }) => {
        try {
          await client.request(MARK_MESSAGES_AS_READ, { conversationId, userId });

          // Fetch the updated unread count for this conversation
          const conversations = await client.request(GET_CONVERSATIONS, { bodyshopId });

          // Emit the updated unread count to all clients
          const room = `conversation-${conversationId}`;
          io.to(room).emit("messaging-list", { conversations });

          admin.messaging().send({
            topic: `${imexshopid}-messaging`,
            data: {
              type: "messaging-mark-conversation-read",
              conversationid: conversationId || ""
            }
          });
        } catch (error) {
          logger.log("Failed to mark messages as read", "error", null, null, {
            message: error.message,
            stack: error.stack
          });
          socket.emit("error", { message: "Failed to mark messages as read" });
        }
      };

      const sendMessage = (data) => {
        const { to, messagingServiceSid, body, conversationid, selectedMedia, imexshopid, user } = data;
        logger.log("sms-outbound", "DEBUG", user.email, null, {
          messagingServiceSid: messagingServiceSid,
          to: phone(to).phoneNumber,
          mediaUrl: selectedMedia.map((i) => i.src),
          text: body,
          conversationid,
          isoutbound: true,
          userid: user.email,
          image: selectedMedia?.length > 0,
          image_path: selectedMedia?.length > 0 ? selectedMedia.map((i) => i.src) : []
        });

        if (!!to && !!messagingServiceSid && (!!body || !!selectedMedia?.length > 0) && !!conversationid) {
          twilioClient.messages
            .create({
              body: body,
              messagingServiceSid: messagingServiceSid,
              to: phone(to).phoneNumber,
              mediaUrl: selectedMedia.map((i) => i.src)
            })
            .then((message) => {
              let newMessage = {
                msid: message.sid,
                text: body,
                conversationid,
                isoutbound: true,
                userid: user.email,
                image: selectedMedia?.length > 0,
                image_path: selectedMedia?.length > 0 ? selectedMedia.map((i) => i.src) : []
              };
              gqlClient
                .request(queries.INSERT_MESSAGE, { msg: newMessage, conversationid })
                .then((r2) => {
                  logger.log("sms-outbound-success", "DEBUG", user.email, null, {
                    msid: message.sid,
                    conversationid
                  });

                  const data = {
                    type: "messaging-outbound",
                    conversationid: newMessage.conversationid || ""
                  };

                  // TODO Verify
                  // const messageData = response.insert_messages.returning[0];

                  // Broadcast new message to conversation room
                  const room = `conversation-${conversationid}`;
                  io.to(room).emit("new-message", newMessage);

                  admin.messaging().send({
                    topic: `${imexshopid}-messaging`,
                    data
                  });
                })
                .catch((e2) => {
                  logger.log("sms-outbound-error", "ERROR", user.email, null, {
                    msid: message.sid,
                    conversationid,
                    error: e2
                  });
                });
            })
            .catch((e1) => {
              logger.log("sms-outbound-error", "ERROR", user.email, null, {
                conversationid,
                error: e1
              });
            });
        } else {
          logger.log("sms-outbound-error", "ERROR", user.email, null, {
            type: "missing-parameters",
            messagingServiceSid: messagingServiceSid,
            to: phone(to).phoneNumber,
            text: body,
            conversationid,
            isoutbound: true,
            userid: user.email,
            image: selectedMedia?.length > 0,
            image_path: selectedMedia?.length > 0 ? selectedMedia.map((i) => i.src) : []
          });
        }
      };

      const leaveConversation = (conversationId) => {
        try {
          const room = `conversation-${conversationId}`;
          socket.leave(room);

          // Optionally notify the client
          socket.emit("conversation-left", { conversationId });
        } catch (error) {
          socket.emit("error", { message: "Failed to leave conversation" });
        }
      };

      socket.on("leave-conversation", leaveConversation);
      socket.on("send-message", sendMessage);
      socket.on("mark-as-read", markAsRead);
      socket.on("join-conversation", joinConversation);
      socket.on("open-messaging", openMessaging);
    };

    // Call Handlers
    registerRoomAndBroadcastEvents(socket);
    registerUpdateEvents(socket);
    registerMessagingEvents(socket);
    registerDisconnectEvents(socket);
  };

  // Associate Middleware and Handlers
  io.use(authMiddleware);
  io.on("connection", registerSocketEvents);
};

module.exports = {
  redisSocketEvents
};