console.log({ query: req.query, params: req.params, body: req.body });

const msgrSettings = settings_667ef98d3ee8930a5debcbdb;
const paSettings = proactive_agent_settings;
const studioToken = msgrSettings
  ? {
      Authorization: `Bearer ${msgrSettings.messenger.token}`,
    }
  : {};

let bot_user = {
  ...paSettings.user,
};

const app = {
  routes: [],
  route: function (regexp, fn) {
    this.routes.push({ regexp: new RegExp(regexp), function: fn });
  },
  run: function (req, res) {
    const path =
      req.params[0].split(
        `/ProxyScript/run/${req.params.workspaceId}/${req.params.branch}/${req.params.route}`
      )[1] || "/";

    for (var route of this.routes) {
      console.log(`Checking route: ${route.regexp}`);
      console.log(`Against path: ${path}`);
      if (route.regexp.test(path)) {
        console.log(`Matched route: ${route.regexp}`);
        route.function(req, res, route.regexp.exec(path));
        return;
      }
    }
    // If no route matches, return a 404 status
    const status = { path: req.params[0], status: 404 };
    res.status(404).send(status);
  },
};

const redisKey = (userId) => {
  return `user-map-${userId}`;
};

const axioshelper = (message, config, callback, retries = 3, delay = 100) => {
  return new Promise(async (resolve, reject) => {
    for (let i = 0; i < retries; i++) {
      try {
        const response = await axios(config);
        console.log({ response: response });
        if (response.status < 200 || response.status > 299) {
          if (callback) {
            await callback();
          } else {
            throw new Error(
              `Axios Request failed! ${JSON.stringify(response)}`
            );
          }
        }
        resolve(response);
        break;
      } catch (error) {
        if (error.response) {
          // The request was made and the server responded with a status code
          // that falls out of the range of 2xx
          console.log(error.response.data);
          console.log(error.response.status);
          console.log(error.response.headers);
        } else if (error.request) {
          // The request was made but no response was received
          // `error.request` is an instance of XMLHttpRequest in the browser and an instance of
          // http.ClientRequest in node.js
          console.log(error.request);
        } else {
          // Something happened in setting up the request that triggered an Error
          console.log("Error", error.message);
        }
        console.log(error.config);
        if (i === retries - 1) {
          if (callback) {
            await callback();
          }
          console.log({
            retry: i + 1,
            error: "out of retries",
            message,
            url: config.url,
          });
          reject(error);
        } else {
          console.log({
            level: "warn",
            message: `Attempt ${i + 1} failed.`,
            url: config.url,
          });
          await new Promise((resolve) => setTimeout(resolve, delay));
        }
      }
    }
  });
};

app.route("^(?:/userId/([^/]+))(?:/$)?$", async (req, res, match) => {
  try {
    console.log(`Received request for userId: ${match[1]}`);
    const modelName =
      req.params?.modelName || proactive_agent_settings.modelName;
    if (match.length > 1) {
      const userId = match[1];
      const smStr = redisKey(userId);
      const sessionMap = await redis.hGetAll(smStr);
      const metadata = {
        userId: bot_user.userId,
      };

      const recognizedData = await axios
        .post(
          `${settings_667ef98d3ee8930a5debcbdb.nlu.apiBaseURL}Model/run/${req.params.workspaceId}/${req.params.branch}/${modelName}`,
          {
            input: req.body.input,
            conversationId: sessionMap.conversationId,
            settings: settings_667ef98d3ee8930a5debcbdb.nlu.settings,
            metadata: metadata,
          }
        )
        .then((response) => {
          return response.data;
        })
        .catch((error) => {
          //If we have error handling turned off, don't record the error
          if (settings_667ef98d3ee8930a5debcbdb.errorHandling === false) {
            throw error;
          } else {
            // Conversation ID is generated by the NLU
            // Must make sure Conversation ID is created properly for an error transaction
            // Get it from session map if it exists, or generate it if we got the error at the very first transaction.
            const conversationId = sessionMap.conversationId || uuidv4();
            let errorPayload = {
              id: uuidv4(),
              workspaceId: req.params.workspaceId,
              errorInfo: {
                name: error.name,
                message: error.message,
                stack: error.stack,
              },
              conversationId,
              input: req.body.input,
              answers: [settings_667ef98d3ee8930a5debcbdb.responses.modelError],
              req: {
                params: req.params,
                query: req.query,
                body: req.body,
                headers: req.headers,
              },
              metadata,
              classificationResults: [
                {
                  label: "Model Error",
                  value: 0.0,
                },
              ],
              nerResults: {
                entities: [],
                sourceEntities: [],
              },
              // Reporting tags to match GlobalSupport function reporting
              tag: "ERROR",
              reporting: {
                tag: "ERROR",
                modelResponse: "ERROR",
              },
            };

            // Add model name
            errorPayload.req.params.route = modelName;

            //add any other details you wish to see in transaction data

            return errorPayload;
          }
        });
      // console.log(recognizedData);
      if (recognizedData.conversationId) {
        await redis.hSet(
          smStr,
          "conversationId",
          recognizedData.conversationId
        );
        await redis.expire(smStr, 3600);
        if (sessionMap.conversationId) {
        } else {
          db.analytics.addConversation({
            id: recognizedData.conversationId,
          });
        }
      }
      recognizedData._id = (
        await db.analytics.addTransaction(recognizedData)
      ).insertedId;

      // Send Answers to Messenger
      new Promise(async (resolve) => {
        for (const [index, answer] of recognizedData.answers.entries()) {
          try {
            await axios.post(
              `${settings_667ef98d3ee8930a5debcbdb.messenger.apiBaseURL}Event/create`,
              {
                conversationId: sessionMap.sessionId,
                metadata: {
                  channel: "web",
                },
                input: answer,
                sentBy: bot_user,
                ping: nanoid(),
                sentAt: Date.now(),
                options: recognizedData?.options,
                metadata: {
                  outputs:
                    recognizedData.answers.length == index + 1
                      ? recognizedData?.outputs
                      : {},
                  transactionId: recognizedData._id,
                  feedbackable: false,
                },
              },
              {
                headers: {
                  Authorization: `Bearer ${settings_667ef98d3ee8930a5debcbdb.messenger.token}`,
                },
              }
            );
          } catch (e) {}
        }
        resolve(true);
      });
      res.send(recognizedData);
    } else {
      res.status(400).send({ error: "Bad Request" });
    }
  } catch (error) {
    console.error(error);
    return res.status(500).send({
      status: 500,
    });
  }
});

app.route("/", async (req, res) => {
  const sessionId = req.body.event?.conversationId;
  const metadata = {
    ...req.body.event?.metadata,
    userId: req.body.event?.sentBy?.userId,
  };

  try {
    if (sessionId && metadata.userId) {
      const umStr = redisKey(metadata.userId);

      await redis.hSet(umStr, "sessionId", sessionId);
      await redis.expire(umStr, 3600);

      await axioshelper("messenger join", {
        method: "post",
        url: `${msgrSettings.messenger.apiBaseURL}Conversation/join`,
        headers: studioToken,
        data: {
          _id: sessionId,
          participant: bot_user,
        },
      });

      res.send();
    } else {
      res.send({ error: "sessionId or userId not found on event." });
    }
  } catch (error) {
    console.log(error);
    res.send({
      answers: ["Something went wrong. Please try again."],
      outputs: {},
    });
  }
});

app.run(req, res);