diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 1182c84..0e14aef 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -17,6 +17,7 @@ dependencies {
     implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
     testImplementation(kotlin("test"))
     testImplementation("io.mockk:mockk:1.4.1")
+    testImplementation("org.mockito:mockito-core:5.11.0")
 }
 
 tasks.test {
diff --git a/app/src/main/kotlin/DataUnavailableException.kt b/app/src/main/kotlin/DataUnavailableException.kt
new file mode 100644
index 0000000..8e57e6b
--- /dev/null
+++ b/app/src/main/kotlin/DataUnavailableException.kt
@@ -0,0 +1,4 @@
+package hu.vanio.kotlin.feladat.ms
+
+class DataUnavailableException(message: String): Exception(message) {
+}
\ No newline at end of file
diff --git a/app/src/main/kotlin/DayWithTemperature.kt b/app/src/main/kotlin/DayWithTemperature.kt
new file mode 100644
index 0000000..46280a9
--- /dev/null
+++ b/app/src/main/kotlin/DayWithTemperature.kt
@@ -0,0 +1,3 @@
+package hu.vanio.kotlin.feladat.ms
+
+class DayWithTemperature (val day: Int, val temp: Double){  }
\ No newline at end of file
diff --git a/app/src/main/kotlin/HourlyData.kt b/app/src/main/kotlin/HourlyData.kt
new file mode 100644
index 0000000..85a94a5
--- /dev/null
+++ b/app/src/main/kotlin/HourlyData.kt
@@ -0,0 +1,6 @@
+package hu.vanio.kotlin.feladat.ms
+
+import java.time.LocalDateTime
+
+
+data class HourlyData(val time: Array<LocalDateTime>, val temperature_2m: Array<String>)
diff --git a/app/src/main/kotlin/HourlyUnits.kt b/app/src/main/kotlin/HourlyUnits.kt
new file mode 100644
index 0000000..f68ba04
--- /dev/null
+++ b/app/src/main/kotlin/HourlyUnits.kt
@@ -0,0 +1,3 @@
+package hu.vanio.kotlin.feladat.ms
+
+data class HourlyUnits(val time: String, val temperature_2m: String)
diff --git a/app/src/main/kotlin/WeatherApp.kt b/app/src/main/kotlin/WeatherApp.kt
index e0c098a..36a28d4 100644
--- a/app/src/main/kotlin/WeatherApp.kt
+++ b/app/src/main/kotlin/WeatherApp.kt
@@ -1,12 +1,55 @@
 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
+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() {
-    runApplication<WeatherApp>()
+    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}")
+    }
 }
 
diff --git a/app/src/main/kotlin/WeatherData.kt b/app/src/main/kotlin/WeatherData.kt
new file mode 100644
index 0000000..19a9e00
--- /dev/null
+++ b/app/src/main/kotlin/WeatherData.kt
@@ -0,0 +1,13 @@
+package hu.vanio.kotlin.feladat.ms
+
+data class WeatherData(
+    val latitude: Double,
+    val longitude: Double,
+    val generationtime_ms: Double,
+    val utc_offset_seconds: Int,
+    val timezone: String,
+    val timezone_abbreviation: String,
+    val elevation: Int,
+    val hourly_units: HourlyUnits,
+    val hourly: HourlyData
+    )
diff --git a/app/src/test/kotlin/WeatherAppTest.kt b/app/src/test/kotlin/WeatherAppTest.kt
index a81a55a..bf3998d 100644
--- a/app/src/test/kotlin/WeatherAppTest.kt
+++ b/app/src/test/kotlin/WeatherAppTest.kt
@@ -1,11 +1,29 @@
 package hu.vanio.kotlin.feladat.ms
 
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.assertThrows
+import org.mockito.Mockito
+import org.mockito.Mockito.verify
 import kotlin.test.Test
+import kotlin.test.assertEquals
 
 class WeatherAppTest {
 
     @Test fun `sikeres lekerdezes`() {
-        TODO()
+        val mockWeatherApp = Mockito.mock(WeatherApp::class.java)
+        val daysWithTemperaturesMap = mutableMapOf<Int, Double>()
+        daysWithTemperaturesMap[11] = 3.6
+        daysWithTemperaturesMap[12] = 5.1
+        Mockito.`when`(mockWeatherApp.calculateAvgTemp("https://goodURL.hu")).thenReturn(daysWithTemperaturesMap)
+        val result = mockWeatherApp.calculateAvgTemp("https://goodURL.hu")
+        verify(mockWeatherApp).calculateAvgTemp("https://goodURL.hu")
+        assertEquals(result, daysWithTemperaturesMap)
+    }
+
+    @Test fun `rossz lekerdezes`() {
+        val weatherApp = WeatherApp()
+        val exception = assertThrows<DataUnavailableException> { weatherApp.calculateAvgTemp("https://api.open-meteo.com/v1/forecasto?latitude=47.4984&longitude=19.0404&hourly=temperature_2m&timezone=auto") }
+        assertTrue(exception.message!!.startsWith("Weather datas are unavailable! Response was:"))
     }
 
 }
\ No newline at end of file