const { admin } = require("../firebase/firebase-handler");
const FortellisLogger = require("../fortellis/fortellis-logger");
const { FortellisJobExport, FortellisSelectedCustomer } = require("../fortellis/fortellis");
const CdkCalculateAllocations = require("../cdk/cdk-calculate-allocations").default;
const registerRREvents = require("./rr-register-socket-events");

const redisSocketEvents = ({ io, redisHelpers, ioHelpers, logger }) => {
  // Destructure helpers locally, but keep full objects available for downstream modules
  const {
    setSessionData,
    getSessionData,
    addUserSocketMapping,
    removeUserSocketMapping,
    refreshUserSocketTTL,
    getUserSocketMappingByBodyshop,
    setSessionTransactionData,
    getSessionTransactionData,
    clearSessionTransactionData
  } = redisHelpers;

  const { getBodyshopRoom, getBodyshopConversationRoom } = ioHelpers;

  // 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 = async (socket, next) => {
    const { token, bodyshopId } = socket.handshake.auth;

    if (!token) {
      return next(new Error("Authentication error - no authorization token."));
    }

    if (!bodyshopId) {
      return next(new Error("Authentication error - no bodyshopId provided."));
    }

    try {
      const user = await admin.auth().verifyIdToken(token);
      socket.user = user;
      socket.bodyshopId = bodyshopId;
      socket.data = socket.data || {};
      socket.data.authToken = token;

      // Used to update legacy sockets
      if (socket.handshake?.auth) {
        socket.handshake.auth.token = token;
        socket.handshake.auth.bodyshopId = bodyshopId;
      }

      // NEW: seed a base session for this socket so downstream handlers can read it
      await setSessionData(socket.id, {
        bodyshopId,
        email: user.email,
        uid: user.user_id || user.uid,
        seededAt: Date.now()
      });

      await addUserSocketMapping(user.email, socket.id, bodyshopId);
      next();
    } catch (error) {
      next(new Error(`Authentication error: ${error.message}`));
    }
  };

  // Register Socket Events
  const registerSocketEvents = (socket) => {
    // Token Update Events
    const registerUpdateEvents = (socket) => {
      let latestTokenTimestamp = 0;

      const updateToken = async ({ token, bodyshopId }) => {
        const currentTimestamp = Date.now();
        latestTokenTimestamp = currentTimestamp;

        if (!token || !bodyshopId) {
          socket.emit("token-updated", { success: false, error: "Token or bodyshopId missing" });
          return;
        }

        try {
          const user = await admin.auth().verifyIdToken(token);
          if (currentTimestamp < latestTokenTimestamp) {
            createLogEvent(socket, "warn", "Outdated token validation skipped.");
            return;
          }
          socket.user = user;
          socket.bodyshopId = bodyshopId;
          // 🔑 keep the live token in a mutable place used by downstream code
          socket.data = socket.data || {};
          socket.data.authToken = token;
          //  also keep handshake in sync for any legacy reads
          if (socket.handshake?.auth) {
            socket.handshake.auth.token = token;
            socket.handshake.auth.bodyshopId = bodyshopId;
          }

          // NEW: refresh (or create) the base session with the latest info
          await setSessionData(socket.id, {
            bodyshopId,
            email: user.email,
            uid: user.user_id || user.uid,
            refreshedAt: Date.now()
          });

          await refreshUserSocketTTL(user.email, bodyshopId);
          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." });
            return;
          }
          createLogEvent(socket, "error", `Token update failed for socket ID: ${socket.id}, Error: ${error.message}`);
          socket.emit("token-updated", { success: false, error: error.message });
          socket.disconnect();
        }
      };
      socket.on("update-token", updateToken);
    };

    // Room Broadcast Events
    const registerRoomAndBroadcastEvents = (socket) => {
      const joinBodyshopRoom = (bodyshopUUID) => {
        try {
          const room = getBodyshopRoom(bodyshopUUID);
          socket.join(room);
        } catch (error) {
          createLogEvent(socket, "error", `Error joining room: ${error}`);
        }
      };

      const leaveBodyshopRoom = (bodyshopUUID) => {
        try {
          const room = getBodyshopRoom(bodyshopUUID);
          socket.leave(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);
        } 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 = async () => {
        if (socket.user?.email) {
          await removeUserSocketMapping(socket.user.email, socket.id);
        }
        // Optional: clear transactional session
        try {
          await clearSessionTransactionData(socket.id);
        } catch {}
        // Leave all rooms except the default room (socket.id)
        const rooms = Array.from(socket.rooms).filter((room) => room !== socket.id);
        for (const room of rooms) {
          socket.leave(room);
        }
      };

      socket.on("disconnect", disconnect);
    };

    // Messaging Events
    const registerMessagingEvents = (socket) => {
      const joinConversationRoom = async ({ bodyshopId, conversationId }) => {
        try {
          const room = getBodyshopConversationRoom({ bodyshopId, conversationId });
          socket.join(room);
        } catch (error) {
          logger.log("Failed to Join Conversation Room", "error", "io-redis", null, {
            bodyshopId,
            conversationId,
            error: error.message,
            stack: error.stack
          });
        }
      };

      const leaveConversationRoom = ({ bodyshopId, conversationId }) => {
        try {
          const room = getBodyshopConversationRoom({ bodyshopId, conversationId });
          socket.leave(room);
        } catch (error) {
          logger.log("Failed to Leave Conversation Room", "error", "io-redis", null, {
            bodyshopId,
            conversationId,
            error: error.message,
            stack: error.stack
          });
        }
      };

      const conversationModified = ({ bodyshopId, conversationId, ...fields }) => {
        try {
          // Retrieve the room name for the conversation
          const room = getBodyshopRoom(bodyshopId);
          // Emit the updated data to all clients in the room
          io.to(room).emit("conversation-changed", {
            conversationId,
            ...fields
          });
        } catch (error) {
          logger.log("Failed to handle conversation modification", "error", "io-redis", null, {
            bodyshopId,
            conversationId,
            fields,
            error: error.message,
            stack: error.stack
          });
        }
      };

      socket.on("conversation-modified", conversationModified);
      socket.on("join-bodyshop-conversation", joinConversationRoom);
      socket.on("leave-bodyshop-conversation", leaveConversationRoom);
    };

    // Sync Notification Read Events
    const registerSyncEvents = (socket) => {
      socket.on("sync-notification-read", async ({ email, bodyshopId, notificationId }) => {
        try {
          const socketMapping = await getUserSocketMappingByBodyshop(email, bodyshopId);
          const timestamp = new Date().toISOString();

          if (socketMapping?.socketIds) {
            socketMapping?.socketIds.forEach((socketId) => {
              if (socketId !== socket.id) {
                // Avoid sending back to the originating socket
                io.to(socketId).emit("sync-notification-read", { notificationId, timestamp });
              }
            });
          }
        } catch (error) {
          createLogEvent(socket, "error", `Error syncing notification read: ${error.message}`);
        }
      });

      socket.on("sync-all-notifications-read", async ({ email, bodyshopId }) => {
        try {
          const socketMapping = await getUserSocketMappingByBodyshop(email, bodyshopId);
          const timestamp = new Date().toISOString();

          if (socketMapping?.socketIds) {
            socketMapping?.socketIds.forEach((socketId) => {
              if (socketId !== socket.id) {
                // Avoid sending back to the originating socket
                io.to(socketId).emit("sync-all-notifications-read", { timestamp });
              }
            });
          }
        } catch (error) {
          createLogEvent(socket, "error", `Error syncing all notifications read: ${error.message}`);
        }
      });
    };

    // Fortellis/CDK Handlers
    const registerFortellisEvents = (socket) => {
      socket.on("fortellis-export-job", async ({ jobid, txEnvelope }) => {
        try {
          await FortellisJobExport({
            socket,
            redisHelpers: {
              setSessionData,
              getSessionData,
              addUserSocketMapping,
              removeUserSocketMapping,
              refreshUserSocketTTL,
              getUserSocketMappingByBodyshop,
              setSessionTransactionData,
              getSessionTransactionData,
              clearSessionTransactionData
            },
            ioHelpers: { getBodyshopRoom, getBodyshopConversationRoom },
            jobid,
            txEnvelope
          });
        } catch (error) {
          FortellisLogger(socket, "error", `Error during Fortellis export : ${error.message}`);
          logger.log("fortellis-job-export-error", "error", null, null, {
            message: error.message,
            stack: error.stack
          });
        }
      });

      socket.on("fortellis-selected-customer", async ({ jobid, selectedCustomerId }) => {
        try {
          await FortellisSelectedCustomer({
            socket,
            redisHelpers: {
              setSessionData,
              getSessionData,
              addUserSocketMapping,
              removeUserSocketMapping,
              refreshUserSocketTTL,
              getUserSocketMappingByBodyshop,
              setSessionTransactionData,
              getSessionTransactionData,
              clearSessionTransactionData
            },
            ioHelpers: { getBodyshopRoom, getBodyshopConversationRoom },
            jobid,
            selectedCustomerId
          });
        } catch (error) {
          FortellisLogger(socket, "error", `Error during Fortellis export : ${error.message}`);
          logger.log("fortellis-selectd-customer-error", "error", null, null, {
            message: error.message,
            stack: error.stack
          });
        }
      });

      socket.on("fortellis-calculate-allocations", async (jobid, callback) => {
        try {
          const allocations = await CdkCalculateAllocations(socket, jobid);
          callback(allocations);
        } catch (error) {
          FortellisLogger(socket, "error", `Error during Fortellis export : ${error.message}`);
          logger.log("fortellis-selectd-customer-error", "error", null, null, {
            message: error.message,
            stack: error.stack
          });
        }
      });
    };

    // Task Events
    const registerTaskEvents = (socket) => {
      socket.on("task-created", (payload) => {
        if (!payload) return;
        const room = getBodyshopRoom(socket.bodyshopId);
        io.to(room).emit("bodyshop-message", { type: "task-created", payload });
      });

      socket.on("task-updated", (payload) => {
        if (!payload) return;
        const room = getBodyshopRoom(socket.bodyshopId);
        io.to(room).emit("bodyshop-message", { type: "task-updated", payload });
      });

      socket.on("task-deleted", (payload) => {
        if (!payload?.id) return;
        const room = getBodyshopRoom(socket.bodyshopId);
        io.to(room).emit("bodyshop-message", { type: "task-deleted", payload });
      });
    };

    // Call Handlers
    registerRoomAndBroadcastEvents(socket);
    registerUpdateEvents(socket);
    registerMessagingEvents(socket);
    registerDisconnectEvents(socket);
    registerSyncEvents(socket);
    registerTaskEvents(socket);
    registerFortellisEvents(socket);

    // Reynolds & Reynolds socket handlers
    registerRREvents({
      socket,
      redisHelpers
    });
  };

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

module.exports = {
  redisSocketEvents
};