var express = require("express");
var router = express.Router();
var axios = require("axios");

const openAPIKey = require("./secrets.json").openAPIKey;
const googleMapKey = require("./secrets.json").googleAPIKey;
const weatherAPIKey = require("./secrets.json").weatherAPIKey;

axios.create({
  // TODO : 웹을 AWS에 올릴때, 해당 baseURL이 달라져야할 수 있음
  baseURL: "http://localhost:3001",
  responseType: "json",
});

/* GET airCondition listing. */
router.get("/", async function (req, res, next) {
  console.log("경도:", req.query.latitude);
  console.log("경도:", req.query.longitude);
  let airCondition = "";
  let response = await getPosition(req.query.latitude, req.query.longitude)
    .then((encodedStation) => getCondition(encodedStation))
    .then((result) => {
      airCondition = result;
    });

  res.send(airCondition);
});

router.get("/weather", async function (req, res, next) {
  console.log("경도:", req.query.latitude);
  console.log("경도:", req.query.longitude);

  let airCondition = "";
  let response = await getEnglishPosition(
    req.query.latitude,
    req.query.longitude
  )
    .then((encodedStation) => getWeather(encodedStation))
    .then((result) => {
      airCondition = result;
    });

  res.send(airCondition);
});

const getWeather = (encodedStation) => {
  return axios
    .get(
      "https://api.openweathermap.org/data/2.5/weather?q=" +
        encodedStation +
        "&appid=" +
        weatherAPIKey
    )
    .then(function (response) {
      return response["data"];
    })
    .catch(function (error) {
      console.log(error.response);
    });
};

const getPosition = (lat, lon) => {
  return axios
    .get(
      "https://maps.googleapis.com/maps/api/geocode/json?latlng=" +
        lat +
        "," +
        lon +
        "&location_type=ROOFTOP&result_type=street_address&key=" +
        googleMapKey +
        "&language=ko"
    )
    .then(function (response) {
      console.log("KEY : ", googleMapKey);
      let stationName = "";
      for (
        let i = 0;
        i < response["data"].results[0]["address_components"].length;
        i++
      ) {
        let temp =
          response["data"].results[0]["address_components"][i]["long_name"];
        if (temp[temp.length - 1] == "구") {
          stationName = temp;
          break;
        }
      }
      console.log("STATION : ", stationName);
      return (encodedStation = encodeURI(stationName));
    })
    .catch(function (error) {
      console.log(error.response);
    });
};

const getEnglishPosition = (lat, lon) => {
  return axios
    .get(
      "https://maps.googleapis.com/maps/api/geocode/json?latlng=" +
        lat +
        "," +
        lon +
        "&location_type=ROOFTOP&result_type=street_address&key=" +
        googleMapKey +
        "&language=en"
    )
    .then(function (response) {
      let stationName =
        response["data"].results[0]["address_components"][3]["long_name"];
      console.log("STATION : ", stationName);
      return (encodedStation = encodeURI(stationName));
    })
    .catch(function (error) {
      console.log(error.response);
    });
};

/* GET route airCondition listing. */
router.get("/route", async function (req, res, next) {
  console.log("출발지:", req.query.departure);
  console.log("도착지:", req.query.arrival);

  let dep = JSON.parse(req.query.departure);
  let depLat = dep["Ha"];
  let depLon = dep["Ga"];

  let arr = JSON.parse(req.query.arrival);
  let arrLat = arr["Ha"];
  let arrLon = arr["Ga"];
  let airCondition = "";

  let response = await getRoute(depLat, depLon, arrLat, arrLon)
    .then((routeInformation) =>
      routeAirCondition(depLat, depLon, routeInformation)
    )
    .then((routeInformation) => {
      airCondition = routeInformation;
    });

  res.send(airCondition);
});

const getCondition = (encodedStation) => {
  return axios
    .get(
      "http://openapi.airkorea.or.kr/openapi/services/rest/ArpltnInforInqireSvc/getMsrstnAcctoRltmMesureDnsty?serviceKey=" +
        openAPIKey +
        "&numOfRows=10&pageNo=1&stationName=" +
        encodedStation +
        "&dataTerm=DAILY&ver=1.3&_returnType=json"
    )
    .then(function (response) {
      // console.log("RES :: ", response);
      result = response["data"]["list"][0];
      return result;
    })
    .catch(function (error) {
      console.log(error.response);
    });
};

const getRoute = (depLat, depLon, arrLat, arrLon) => {
  return axios
    .get(
      "https://maps.googleapis.com/maps/api/directions/json?origin=" +
        depLat +
        "," +
        depLon +
        "&destination=" +
        arrLat +
        "," +
        arrLon +
        "&mode=transit&departure_time=now&key=" +
        googleMapKey +
        "&language=ko"
    )
    .then(function (response) {
      console.log(response["data"]);
      let routeInformation = [];
      for (
        let i = 0;
        i < response["data"].routes[0]["legs"][0]["steps"].length;
        i++
      ) {
        let info = {};
        info["instruction"] =
          response["data"].routes[0]["legs"][0]["steps"][i][
            "html_instructions"
          ];
        info["location"] =
          response["data"].routes[0]["legs"][0]["steps"][i]["end_location"];
        info["duration"] =
          response["data"].routes[0]["legs"][0]["steps"][i]["duration"]["text"];
        info["travel_mode"] =
          response["data"].routes[0]["legs"][0]["steps"][i]["travel_mode"];
        routeInformation.push(info);
      }
      // console.log(routeInformation);
      return routeInformation;
    })
    .catch(function (error) {
      console.log(error.response);
    });
};

const routeAirCondition = async (depLat, depLon, routeInformation) => {
  await getPosition(depLat, depLon)
    .then((encodedStation) => getCondition(encodedStation))
    .then((result) => {
      let info = {};
      info["airCondition"] = result;
      routeInformation.push(info);
    });
  for (let i = 0; i < routeInformation.length - 1; i++) {
    await getPosition(
      routeInformation[i]["location"]["lat"],
      routeInformation[i]["location"]["lng"]
    )
      .then((encodedStation) => getCondition(encodedStation))
      .then((result) => {
        routeInformation[i]["airCondition"] = result;
      });
  }
  console.log(routeInformation);
  return routeInformation;
};

module.exports = router;