/*
 * Copyright (c) 2023 New Vector Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.element.android.features.login.impl.changeserver

import app.cash.molecule.RecompositionMode
import app.cash.molecule.moleculeFlow
import app.cash.turbine.test
import com.google.common.truth.Truth.assertThat
import io.element.android.features.login.impl.accountprovider.AccountProvider
import io.element.android.features.login.impl.accountprovider.AccountProviderDataSource
import io.element.android.libraries.architecture.AsyncData
import io.element.android.libraries.matrix.test.A_HOMESERVER
import io.element.android.libraries.matrix.test.A_HOMESERVER_URL
import io.element.android.libraries.matrix.test.auth.FakeMatrixAuthenticationService
import io.element.android.tests.testutils.WarmUpRule
import kotlinx.coroutines.test.runTest
import org.junit.Rule
import org.junit.Test

class ChangeServerPresenterTest {
    @get:Rule
    val warmUpRule = WarmUpRule()

    @Test
    fun `present - initial state`() = runTest {
        val presenter = ChangeServerPresenter(
            FakeMatrixAuthenticationService(),
            AccountProviderDataSource()
        )
        moleculeFlow(RecompositionMode.Immediate) {
            presenter.present()
        }.test {
            val initialState = awaitItem()
            assertThat(initialState.changeServerAction).isEqualTo(AsyncData.Uninitialized)
        }
    }

    @Test
    fun `present - change server ok`() = runTest {
        val authenticationService = FakeMatrixAuthenticationService()
        val presenter = ChangeServerPresenter(
            authenticationService,
            AccountProviderDataSource()
        )
        moleculeFlow(RecompositionMode.Immediate) {
            presenter.present()
        }.test {
            val initialState = awaitItem()
            assertThat(initialState.changeServerAction).isEqualTo(AsyncData.Uninitialized)
            authenticationService.givenHomeserver(A_HOMESERVER)
            initialState.eventSink.invoke(ChangeServerEvents.ChangeServer(AccountProvider(url = A_HOMESERVER_URL)))
            val loadingState = awaitItem()
            assertThat(loadingState.changeServerAction).isInstanceOf(AsyncData.Loading::class.java)
            val successState = awaitItem()
            assertThat(successState.changeServerAction).isEqualTo(AsyncData.Success(Unit))
        }
    }

    @Test
    fun `present - change server error`() = runTest {
        val authenticationService = FakeMatrixAuthenticationService()
        val presenter = ChangeServerPresenter(
            authenticationService,
            AccountProviderDataSource()
        )
        moleculeFlow(RecompositionMode.Immediate) {
            presenter.present()
        }.test {
            val initialState = awaitItem()
            assertThat(initialState.changeServerAction).isEqualTo(AsyncData.Uninitialized)
            initialState.eventSink.invoke(ChangeServerEvents.ChangeServer(AccountProvider(url = A_HOMESERVER_URL)))
            val loadingState = awaitItem()
            assertThat(loadingState.changeServerAction).isInstanceOf(AsyncData.Loading::class.java)
            val failureState = awaitItem()
            assertThat(failureState.changeServerAction).isInstanceOf(AsyncData.Failure::class.java)
            // Clear error
            failureState.eventSink.invoke(ChangeServerEvents.ClearError)
            val finalState = awaitItem()
            assertThat(finalState.changeServerAction).isEqualTo(AsyncData.Uninitialized)
        }
    }
}
