package world.respect.datalayer.repository.opds

import androidx.room.Room
import androidx.sqlite.driver.bundled.BundledSQLiteDriver
import app.cash.turbine.test
import io.ktor.client.HttpClient
import io.ktor.client.engine.okhttp.OkHttp
import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
import io.ktor.http.Url
import io.ktor.serialization.kotlinx.json.json
import io.ktor.server.application.install
import io.ktor.server.engine.embeddedServer
import io.ktor.server.http.content.staticResources
import io.ktor.server.netty.Netty
import io.ktor.server.plugins.calllogging.CallLogging
import io.ktor.server.plugins.conditionalheaders.ConditionalHeaders
import io.ktor.server.routing.routing
import kotlinx.coroutines.flow.filter
import kotlinx.coroutines.flow.first
import kotlinx.coroutines.runBlocking
import kotlinx.coroutines.withTimeout
import kotlinx.serialization.json.Json
import okhttp3.OkHttpClient
import org.junit.Rule
import org.junit.rules.TemporaryFolder
import org.mockito.kotlin.mock
import world.respect.datalayer.AuthenticatedUserPrincipalId
import world.respect.lib.dataloadstate.DataLoadParams
import world.respect.lib.dataloadstate.DataReadyState
import world.respect.lib.dataloadstate.NoDataLoadedState
import world.respect.datalayer.db.RespectSchoolDatabase
import world.respect.datalayer.db.school.opds.OpdsFeedDataSourceDb
import world.respect.datalayer.db.school.opds.OpdsPublicationDataSourceDb
import world.respect.lib.dataloadstate.ext.dataOrNull
import world.respect.datalayer.http.school.opds.OpdsFeedDataSourceHttp
import world.respect.datalayer.http.school.opds.OpdsPublicationDataSourceHttp
import world.respect.datalayer.school.model.AuthToken
import world.respect.datalayer.school.opds.OpdsPublicationDataSourceLocal
import world.respect.datalayer.school.opds.ext.hasRel
import world.respect.datalayer.shared.XXHashUidNumberMapper
import world.respect.lib.opds.model.LangMapStringValue
import world.respect.lib.primarykeygen.PrimaryKeyGenerator
import world.respect.libutil.findFreePort
import world.respect.libutil.util.time.systemTimeInMillis
import world.respect.libxxhash.jvmimpl.XXStringHasherCommonJvm
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.time.Clock
import kotlin.time.Duration.Companion.milliseconds
import kotlin.time.Duration.Companion.seconds
import kotlin.time.ExperimentalTime

class OpdsRespectRepositoryIntegrationTest {

    @Rule
    @JvmField
    val temporaryFolder: TemporaryFolder = TemporaryFolder()

    data class OpdsRepositoryIntegrationTestContext(
        val port: Int,
        val db: RespectSchoolDatabase,
        val json: Json,
        val okHttpClient: OkHttpClient,
        val httpClient: HttpClient,
        val xxStringHasher: XXStringHasherCommonJvm,
        val opdsFeedLocal: OpdsFeedDataSourceDb,
        val opdsFeedRemote: OpdsFeedDataSourceHttp,
        val opdsFeedRepository: OpdsFeedDataSourceRepository,
        val opdsPubLocal: OpdsPublicationDataSourceLocal,
        val opdsPubRemote: OpdsPublicationDataSourceHttp,
        val opdsPubRepository: OpdsPublicationDataSourceRepository,
    )

    private fun opdsIntegrationTest(
        block: OpdsRepositoryIntegrationTestContext.() -> Unit
    ) {
        val port = findFreePort()
        println("port = $port")
        val server = embeddedServer(Netty, port = port) {
            install(ConditionalHeaders)
            install(CallLogging)

            routing {
                staticResources("/resources", "/world/respect/datalayer/repository/opds")
            }
        }.start()

        try {
            val dbFile = temporaryFolder.newFile("respect-school.db")
            val db = Room.databaseBuilder<RespectSchoolDatabase>(dbFile.absolutePath)
                .setDriver(BundledSQLiteDriver())
                .build()

            val json = Json { ignoreUnknownKeys = true }

            val okHttpClient = OkHttpClient.Builder().build()

            val httpClient = HttpClient(OkHttp) {
                install(ContentNegotiation) {
                    json(json = json)
                }
                engine {
                    preconfigured = okHttpClient
                }
            }

            val xxStringHasher = XXStringHasherCommonJvm()
            val numberMapper = XXHashUidNumberMapper(xxStringHasher)
            val primaryKeyGenerator = PrimaryKeyGenerator(RespectSchoolDatabase.TABLE_IDS)

            val localDataSource = OpdsFeedDataSourceDb(
                json = json,
                uidNumberMapper = numberMapper,
                primaryKeyGenerator = primaryKeyGenerator,
                schoolDb = db,
                authenticatedUser = AuthenticatedUserPrincipalId("0"),
            )

            val httpDataSource = OpdsFeedDataSourceHttp(
                httpClient = httpClient,
                opdsFeedValidationHelper = localDataSource,
                tokenProvider = {
                    AuthToken("secret", systemTimeInMillis(), 3600)
                }
            )

            val repository = OpdsFeedDataSourceRepository(
                local = localDataSource,
                remote = httpDataSource,
                remoteWriteQueue = mock {  }
            )

            val opdsPubLocal = OpdsPublicationDataSourceDb(
                respectSchoolDatabase = db,
                json = json,
                uidNumberMapper = numberMapper,
                primaryKeyGenerator = primaryKeyGenerator,
            )

            val opdsPubRemote = OpdsPublicationDataSourceHttp(
                httpClient = httpClient,
                publicationValidationHelper = null,
                json = json,
            )

            block(
                OpdsRepositoryIntegrationTestContext(
                    port = port,
                    db = db,
                    json = json,
                    okHttpClient = okHttpClient,
                    httpClient = httpClient,
                    xxStringHasher = xxStringHasher,
                    opdsFeedLocal = localDataSource,
                    opdsFeedRemote = httpDataSource,
                    opdsFeedRepository = repository,
                    opdsPubLocal = opdsPubLocal,
                    opdsPubRemote = opdsPubRemote,
                    opdsPubRepository = OpdsPublicationDataSourceRepository(
                        local = opdsPubLocal,
                        remote = opdsPubRemote,
                    )
                )
            )
        }finally {
            server.stop()
        }
    }

    @OptIn(ExperimentalTime::class)
    @Test
    fun givenOpdsFeed_whenLoadOpdsFeed_thenFlowWillLoadIt() {
        opdsIntegrationTest {
            val url = Url("http://localhost:$port/resources/index.json")
            runBlocking {
                val loadStart = Clock.System.now().toEpochMilliseconds()
                opdsFeedRepository.getByUrlAsFlow(url, DataLoadParams()).filter {
                    it is DataReadyState
                }.test(timeout = 10.seconds) {
                    val data = awaitItem()
                    val waitTime = Clock.System.now().toEpochMilliseconds() - loadStart
                    println("Loaded in $waitTime ms")
                    assertEquals("Main Menu", data.dataOrNull()?.metadata?.title)
                    cancelAndIgnoreRemainingEvents()
                }

                opdsFeedRepository.getByUrlAsFlow(url, DataLoadParams()).filter {
                    it is DataReadyState && it.remoteState is NoDataLoadedState
                }.test(timeout = 10.seconds) {
                    val data = awaitItem()
                    val waitTime = Clock.System.now().toEpochMilliseconds() - loadStart
                    println("Loaded in $waitTime ms")
                    assertEquals("Main Menu", data.dataOrNull()?.metadata?.title)
                    cancelAndIgnoreRemainingEvents()
                }
            }
        }
    }

    @OptIn(ExperimentalTime::class)
    @Test
    fun givenOpdsFeedLoaded_whenLoadedAgain_thenDataIsLoadedAndNetworkResponseIsNotModified() {
        opdsIntegrationTest {
            val url = Url("http://localhost:$port/resources/index.json")
            runBlocking {
                withTimeout(15_000.milliseconds) {
                    opdsFeedRepository.getByUrlAsFlow(url, DataLoadParams()).filter {
                        it is DataReadyState
                    }.first()

                    opdsFeedRepository.getByUrlAsFlow(url, DataLoadParams()).filter {
                        it is DataReadyState && it.remoteState is NoDataLoadedState
                    }.test(timeout = 10.seconds) {
                        val data = awaitItem()
                        assertEquals(NoDataLoadedState.Reason.NOT_MODIFIED,
                            (data.remoteState as? NoDataLoadedState)?.reason)

                        assertEquals("Main Menu", data.dataOrNull()?.metadata?.title)
                        cancelAndIgnoreRemainingEvents()
                    }
                }
            }
        }
    }


    @OptIn(ExperimentalTime::class)
    @Test
    fun givenOpdsPublication_whenLoadedThenWillEmitFlow() {
        opdsIntegrationTest {
            val url = Url("http://localhost:$port/resources/lesson001.json")
            runBlocking {
                val loadStart = Clock.System.now().toEpochMilliseconds()
                opdsPubRepository.getByUrlAsFlow(
                    url, DataLoadParams(), null, null
                ).filter {
                    it is DataReadyState
                }.test(timeout = 10.seconds) {
                    val data = awaitItem()
                    val waitTime = Clock.System.now().toEpochMilliseconds() - loadStart
                    println("Loaded in $waitTime ms")

                    assertEquals(
                        expected = LangMapStringValue("Lesson 001"),
                        actual = data.dataOrNull()?.metadata?.title
                    )

                    assertEquals(
                        expected = "lesson001.html",
                        actual = data.dataOrNull()?.links?.firstOrNull {
                            it.hasRel("http://opds-spec.org/acquisition/open-access")
                        }?.href
                    )

                    cancelAndIgnoreRemainingEvents()
                }
            }
        }
    }


}