const fetch = require("node-fetch");

fetch(
  "https://candidate.hubteam.com/candidateTest/v3/problem/dataset?userKey=8270d53c6a7e40205f4743b15c15"
)
  .then(res => res.json())
  .then(data => {
    messages = data["messages"];
    ourUser = data["userId"];

    let users = data["users"];
    let userIDS = {};
    users.forEach(function(hash) {
      userIDS[hash["id"]] = {
        totalMessages: 0,
        mostRecentMessageTimestamp: new Date(1910, 1, 1),
        mostRecentMessage: "",
        mostRecentMessageUserId: null
      };
    });

    messages.forEach(function(message) {
      if (
        message["toUserId"] === ourUser ||
        message["fromUserId"] === ourUser
      ) {
        key = message["fromUserId"];
        if (
          userIDS[message["fromUserId"]] === undefined &&
          message["fromUserId"] === ourUser
        ) {
          key = message["toUserId"];
        }

        userIDS[key]["totalMessages"]++;
        currRecent = new Date(userIDS[key]["mostRecentMessageTimestamp"]);
        timestampDate = new Date(message.timestamp);
        if (currRecent < timestampDate) {
          userIDS[key]["mostRecentMessageTimestamp"] = message.timestamp;
          userIDS[key]["mostRecentMessage"] = message.content;
          userIDS[key]["mostRecentMessageUserId"] = message["fromUserId"];
        }
      }
    });

    let conversations = [];
    let keys = Object.keys(userIDS);

    keys.forEach(function(id) {
      let avatar = undefined;
      let firstName = undefined;
      let lastName = undefined;
      users.forEach(function(user) {
        if (user["id"] == id) {
          avatar = user["avatar"];
          firstName = user["firstName"];
          lastName = user["lastName"];
        }
      });
      conversations.push({
        avatar: avatar,
        firstName: firstName,
        lastName: lastName,
        mostRecentMessage: {
          content: userIDS[id]["mostRecentMessage"],
          timestamp: userIDS[id]["mostRecentMessageTimestamp"],
          userId: userIDS[id]["mostRecentMessageUserId"]
        },
        totalMessages: userIDS[id]["totalMessages"],
        userId: id
      });
    });

    conversations.sort(function(a, b) {
      var keyA = new Date(a["mostRecentMessage"]["timestamp"]),
        keyB = new Date(b["mostRecentMessage"]["timestamp"]);
      // Compare the 2 dates
      if (keyA < keyB) return 1;
      if (keyA > keyB) return -1;
      return 0;
    });
    let postData = { conversations };
    // fetch(
    //   "https://candidate.hubteam.com/candidateTest/v3/problem/result?userKey=8270d53c6a7e40205f4743b15c15",
    //   {
    //     method: "post",
    //     headers: {
    //       "Content-Type": "application/json"
    //     },
    //     body: JSON.stringify(postData)
    //   }
    // )
    //   .then(res => res.json())
    //   .then(data => console.log(data));
  });