package io.sentry.transport

import io.sentry.ILogger
import io.sentry.ISerializer
import io.sentry.ISocketTagger
import io.sentry.RequestDetails
import io.sentry.SentryEnvelope
import io.sentry.SentryEvent
import io.sentry.SentryLevel
import io.sentry.SentryOptions
import io.sentry.SentryOptions.Proxy
import io.sentry.Session
import io.sentry.protocol.User
import java.io.IOException
import java.net.InetSocketAddress
import java.net.Proxy.Type
import java.net.URL
import java.nio.charset.Charset
import javax.net.ssl.HttpsURLConnection
import javax.net.ssl.SSLSocketFactory
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFalse
import kotlin.test.assertNull
import kotlin.test.assertTrue
import org.mockito.kotlin.any
import org.mockito.kotlin.check
import org.mockito.kotlin.eq
import org.mockito.kotlin.mock
import org.mockito.kotlin.never
import org.mockito.kotlin.verify
import org.mockito.kotlin.whenever

class HttpConnectionTest {
  private class Fixture {
    val serializer = mock<ISerializer>()
    var proxy: Proxy? = null
    val connection = mock<HttpsURLConnection>()
    val currentDateProvider = mock<ICurrentDateProvider>()
    val authenticatorWrapper = mock<AuthenticatorWrapper>()
    val rateLimiter = mock<RateLimiter>()
    var sslSocketFactory: SSLSocketFactory? = null
    val requestDetails = mock<RequestDetails>()
    val socketTagger = mock<ISocketTagger>()
    val options = SentryOptions()

    init {
      whenever(connection.outputStream).thenReturn(mock())
      whenever(connection.inputStream).thenReturn(mock())
      whenever(connection.setSSLSocketFactory(any())).thenCallRealMethod()
      whenever(requestDetails.headers).thenReturn(mapOf("header-name" to "header-value"))
      val url = mock<URL>()
      whenever(url.openConnection()).thenReturn(connection)
      whenever(url.openConnection(any())).thenReturn(connection)
      whenever(requestDetails.url).thenReturn(url)
    }

    fun getSUT(): HttpConnection {
      options.setSerializer(serializer)
      options.proxy = proxy
      options.sslSocketFactory = sslSocketFactory
      options.setSocketTagger(socketTagger)

      return HttpConnection(options, requestDetails, authenticatorWrapper, rateLimiter)
    }
  }

  private val fixture = Fixture()

  @Test
  fun `test serializes envelope`() {
    val transport = fixture.getSUT()
    whenever(fixture.connection.responseCode).thenReturn(200)

    val envelope = SentryEnvelope.from(fixture.serializer, createSession(), null)

    val result = transport.send(envelope)

    verify(fixture.serializer).serialize(eq(envelope), any())
    assertTrue(result.isSuccess)
  }

  @Test
  fun `uses Retry-After header if X-Sentry-Rate-Limit is not set when sending an envelope`() {
    val transport = fixture.getSUT()

    throwOnEnvelopeSerialize()
    whenever(fixture.connection.getHeaderField(eq("Retry-After"))).thenReturn("30")
    whenever(fixture.connection.responseCode).thenReturn(429)
    whenever(fixture.currentDateProvider.currentTimeMillis).thenReturn(0)

    val envelope = SentryEnvelope.from(fixture.serializer, createSession(), null)

    val result = transport.send(envelope)

    verify(fixture.rateLimiter).updateRetryAfterLimits(null, "30", 429)
    verify(fixture.serializer).serialize(eq(envelope), any())
    assertFalse(result.isSuccess)
  }

  @Test
  fun `passes on the response code on error when sending an envelope`() {
    val transport = fixture.getSUT()

    throwOnEnvelopeSerialize()
    whenever(fixture.connection.responseCode).thenReturn(1234)

    val envelope = SentryEnvelope.from(fixture.serializer, createSession(), null)

    val result = transport.send(envelope)

    verify(fixture.serializer).serialize(eq(envelope), any())
    assertFalse(result.isSuccess)
    assertEquals(1234, result.responseCode)
  }

  @Test
  fun `uses the default retry interval if there is no Retry-After header when sending an envelope`() {
    val transport = fixture.getSUT()

    throwOnEnvelopeSerialize()
    whenever(fixture.connection.responseCode).thenReturn(429)
    whenever(fixture.currentDateProvider.currentTimeMillis).thenReturn(0)

    val envelope = SentryEnvelope.from(fixture.serializer, createSession(), null)

    val result = transport.send(envelope)

    verify(fixture.serializer).serialize(eq(envelope), any())
    verify(fixture.rateLimiter).updateRetryAfterLimits(null, null, 429)
    assertFalse(result.isSuccess)
  }

  @Test
  fun `failure to get response code doesn't break sending an envelope`() {
    val transport = fixture.getSUT()

    throwOnEnvelopeSerialize()
    whenever(fixture.connection.responseCode).thenThrow(IOException())

    val session = Session("123", User(), "env", "release")
    val envelope = SentryEnvelope.from(fixture.serializer, session, null)

    val result = transport.send(envelope)

    verify(fixture.serializer).serialize(eq(envelope), any())
    assertFalse(result.isSuccess)
    assertEquals(-1, result.responseCode)
  }

  @Test
  fun `When SSLSocketFactory is given, set to connection`() {
    val factory = mock<SSLSocketFactory>()
    fixture.sslSocketFactory = factory
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    verify(fixture.connection).sslSocketFactory = eq(factory)
  }

  @Test
  fun `When SSLSocketFactory is not given, do not set to connection`() {
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    verify(fixture.connection, never()).sslSocketFactory = any()
  }

  @Test
  fun `When connection error message contains formatting symbols, does not crash the logger`() {
    fixture.options.isDebug = true
    fixture.options.setLogger(
      object : ILogger {
        override fun log(level: SentryLevel, message: String, vararg args: Any?) =
          println(String.format(message, args))

        override fun log(level: SentryLevel, message: String, throwable: Throwable?) =
          println(message)

        override fun log(
          level: SentryLevel,
          throwable: Throwable?,
          message: String,
          vararg args: Any?,
        ) = println(String.format(message))

        override fun isEnabled(level: SentryLevel?): Boolean = true
      }
    )

    // when error message contains funky formatting symbols
    whenever(fixture.connection.errorStream)
      .thenReturn("Something is off %d, %s, %s\n".byteInputStream(Charset.forName("UTF-8")))
    val transport = fixture.getSUT()

    // it should not crash
    transport.send(createEnvelope())
  }

  @Test
  fun `When Proxy host and port are given, set to connection`() {
    fixture.proxy = Proxy("proxy.example.com", "8090")
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    assertEquals(
      java.net.Proxy(Type.HTTP, InetSocketAddress("proxy.example.com", 8090)),
      transport.proxy,
    )
  }

  @Test
  fun `When Proxy username and password are given, set to connection`() {
    fixture.proxy = Proxy("proxy.example.com", "8090", "some-user", "some-password")
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    verify(fixture.authenticatorWrapper)
      .setDefault(
        check<ProxyAuthenticator> {
          assertEquals("some-user", it.user)
          assertEquals("some-password", it.password)
        }
      )
  }

  @Test
  fun `When Proxy port has invalid format, proxy is not set to connection`() {
    fixture.proxy = Proxy("proxy.example.com", "xxx")
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    assertNull(transport.proxy)
    verify(fixture.authenticatorWrapper, never()).setDefault(any())
  }

  @Test
  fun `When Proxy type is not set, it defaults to HTTP`() {
    fixture.proxy = Proxy("proxy.example.com", "8080")
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    assertEquals(Type.HTTP, transport.proxy!!.type())
  }

  @Test
  fun `When Proxy type is set to SOCKS, HTTP connection uses it`() {
    fixture.proxy = Proxy("proxy.example.com", "8080").apply { type = Type.SOCKS }
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    assertEquals(Type.SOCKS, transport.proxy!!.type())
  }

  @Test
  fun `When Proxy username and password are given but host is missing, authenticator is not set`() {
    fixture.proxy = Proxy(null, "8090", "some-user", "some-password")
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    assertNull(transport.proxy)
    verify(fixture.authenticatorWrapper, never()).setDefault(any())
  }

  @Test
  fun `sets common headers and on http connection`() {
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    verify(fixture.connection).setRequestProperty("header-name", "header-value")
    verify(fixture.requestDetails.url).openConnection()
  }

  @Test
  fun `tags sockets`() {
    val transport = fixture.getSUT()

    transport.send(createEnvelope())

    verify(fixture.socketTagger).tagSockets()
    verify(fixture.socketTagger).untagSockets()
  }

  private fun createSession(): Session = Session("123", User(), "env", "release")

  private fun throwOnEnvelopeSerialize() {
    whenever(fixture.serializer.serialize(any(), any())).thenThrow(IOException())
  }

  private fun createEnvelope(event: SentryEvent = SentryEvent()): SentryEnvelope =
    SentryEnvelope.from(fixture.serializer, event, null)
}
