WeatherApp.kt

package hu.vanio.kotlin.feladat.ms

import com.fasterxml.jackson.databind.SerializationFeature
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
import com.fasterxml.jackson.module.kotlin.readValue
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
import java.net.URI
import java.net.http.HttpClient
import java.net.http.HttpRequest
import java.net.http.HttpResponse

@SpringBootApplication
class WeatherApp {
    fun calculateAvgTemp(getUrl: String): MutableMap<Int, Double> {
        val client = HttpClient.newBuilder().build();
        val request = HttpRequest.newBuilder()
            .uri(URI.create(getUrl))
            .build();

        val response = client.send(request, HttpResponse.BodyHandlers.ofString());
        if (response.statusCode() != 200) {
            throw DataUnavailableException("Weather datas are unavailable! Response was: " + response.body())
        }
        val mapper = jacksonObjectMapper()
        mapper.registerModule(JavaTimeModule());
        mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
        val weatherData: WeatherData = mapper.readValue(response.body())
        val times = weatherData.hourly.time.toList()
        val temperatures = weatherData.hourly.temperature_2m.toList()
        val dayWithTemperatures = mutableListOf<DayWithTemperature>()
        for (i in times.indices) {
            dayWithTemperatures.add(DayWithTemperature(times[i].dayOfMonth, temperatures[i].toDouble()))
        }

        val daysWithTemperaturesMap = mutableMapOf<Int, Double>()
        dayWithTemperatures.forEach {
            if (!daysWithTemperaturesMap.containsKey(it.day)) {
                daysWithTemperaturesMap[it.day] = it.temp
            } else {
                daysWithTemperaturesMap[it.day] = daysWithTemperaturesMap[it.day]!! + it.temp
            }
        }
        return daysWithTemperaturesMap
    }
}

fun main() {
    val weatherApp = WeatherApp()
    weatherApp.calculateAvgTemp("https://api.open-meteo.com/v1/forecast?latitude=47.4984&longitude=19.0404&hourly=temperature_2m&timezone=auto").forEach {
        println("${it.key}: ${it.value/24}")
    }
}