const express = require("express");
const router = express.Router();
const axios = require("axios");
const url = require("url");
const util = require("util");

router.get("/", (req, res) => {
  // token in session -> get user data and send it back to the vue app
  if (req.session.token) {
    query(req.query.referenceId);
  }
  // no token -> send nothing
  else {
    const params = new url.URLSearchParams({
      grant_type: "password",
      username: process.env.EO_API_USERNAME,
      password: process.env.EO_API_PASSWORD,
      scope: process.env.EO_API_SCOPE,
      client_id: process.env.EO_API_CLIENT_ID,
      client_secret: process.env.EO_API_SECRET,
    });

    axios
      .post(process.env.EO_API_ACCESS_TOKEN_URL, params.toString(), {
        headers: {
          "Content-Type": "application/x-www-form-urlencoded",
        },
      })
      .then((result) => {
        // save token to session
        req.session.token = result.data.access_token;
        console.log(result);

        query(req.query.referenceId);
      })
      .catch((err) => {
        sendError(err, res);
      });
  }

  function query(referenceId) {
    console.log("Executing Query");

    var query = `query ($startTime: DateTime, $endTime: DateTime) {
      findContactsCompletedBetween(startTime: $startTime, endTime: $endTime, filter: {interactionTypes : EMAIL}) {
       
      totalCount
      edges {
        node {
          systemId
          startTime
          endTime
          direction
          handledBy {
              username
              firstName
              lastName
              nickname
              orgScope
          }
          activeDuration
          notes {
             totalCount
                 edges {
                     node {
                        text
                      }
                  }
              }
          interaction {
              systemId
              locale
              __typename
              ... on Email {
                  messageId
                  threadId
                  sentDate
                  receivedDate
                  subject
                  fromAddress
                  toAddresses
                  ccAddresses
                  bccAddresses
                  detectedLanguage
                  mailboxName
                  attachmentCount
                  isDuplicate
              }
          }
          outcome {
              totalCount
                  edges {
                      node {
                          text
                          isActive
                          isVisible
                      }
                  }
              }
          customer {
              totalCount
                  edges {
                      node {
                          ref
                          firstName
                          lastName
                      }
                  }
          }
          queue {
              name
              orgScope
          }
        }
      }
    }
  }`;
    var startTime = new Date(
      new Date().setFullYear(new Date().getFullYear() - 2)
    );
    var endTime = new Date(new Date().setHours(new Date().getHours() - 1));

    axios
      .post(
        process.env.EO_API_UDG_URL,
        JSON.stringify({
          query,
          variables: { startTime, endTime },
        }),
        {
          headers: {
            Authorization: `OIDC_id_token ${req.session.token}`,
            "Content-Type": "application/json",
          },
        }
      )
      .then((result) => {
        var contacts = result.data.data.findContactsCompletedBetween.edges;

        // Log error to console
        if (result.data.errors && result.data.errors.length > 0) {
          result.data.errors.forEach(function (error, i) {
            console.log("ERROR: Errors in results - " + error.message);
          });

          // TODO: Should keep errors for filteredContacts
          result.data.errors = [];
        }

        var filteredContacts = [];
        contacts.forEach(function (contact, i) {
          if (contact.node.interaction.__typename === "Email") {
            // threadId if Reference in Subject line will do
            if (
              (contact.node.interaction.threadId === referenceId) |
              contact.node.interaction.subject.includes(
                `<< Ref:${referenceId} >>`
              )
            ) {
              filteredContacts.push(contact);
            }
          }
        });

        result.data.data.findContactsCompletedBetween.edges = filteredContacts;
        result.data.data.findContactsCompletedBetween.totalCount =
          filteredContacts.length;

        // Summary Values
        var summary = {};

        summary.totalCount = filteredContacts.length;
        summary.totalInboundCount = 0;
        summary.totalInboundActiveSeconds = 0;

        if (summary.totalCount > 0) {
          summary.firstContactReceivedDate = new Date(
            filteredContacts[0].node.interaction.receivedDate
          );

          filteredContacts.forEach(function (contact, i) {
            if (contact.node.direction === "INBOUND") {
              summary.totalInboundCount++;
              if (!summary.firstInboundContactStartDate) {
                summary.firstInboundContactStartDate = new Date(
                  contact.node.startTime
                );

                summary.firstContactReceivedDate = new Date(
                  contact.node.interaction.receivedDate
                );
              }
              summary.totalInboundActiveSeconds += contact.node.activeDuration;
            }
          });

          // TODO: Because of overlapping contacts, we may need to calculate max instead of last.
          summary.lastContactEndTime = new Date(
            filteredContacts[filteredContacts.length - 1].node.endTime
          );

          summary.totalHTHours =
            (summary.lastContactEndTime.getTime() -
              summary.firstContactReceivedDate.getTime()) /
            (1000 * 3600);
          summary.activeHTMinutes =
            (summary.lastContactEndTime.getTime() -
              summary.firstInboundContactStartDate.getTime()) /
            (1000 * 60);
        }
        result.data.data.summary = summary;

        if (result.data) {
          console.log(
            util.inspect(summary, {
              showHidden: false,
              depth: null,
              colors: true,
            })
          );

          res.send(result.data);
        }

        // expired token -> send nothing
        else {
          req.session.destroy();
          res.send({});
        }
      })
      .catch((err) => {
        // bin the token on error
        req.session.destroy();
        sendError(err, res);
      });
  }
});
module.exports = router;
function sendError(err, res) {
  console.error(err);
  let errStatus = 500;
  if (err.response) errStatus = err.response.status;
  res.status(errStatus).send({
    errors: [
      {
        status: errStatus,
        title: err.code,
        detail: err.message,
      },
    ],
  });
}