/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * 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 com.android.healthconnect.controller.migration.api

import android.health.connect.HealthConnectDataState
import android.health.connect.migration.HealthConnectMigrationUiState
import androidx.core.os.asOutcomeReceiver
import com.android.healthconnect.controller.migration.api.MigrationRestoreState.DataRestoreUiState
import com.android.healthconnect.controller.migration.api.MigrationRestoreState.MigrationUiState
import com.android.healthconnect.controller.shared.usecase.BaseUseCase
import com.android.healthconnect.controller.shared.usecase.IoDispatcher
import javax.inject.Inject
import javax.inject.Singleton
import kotlinx.coroutines.CoroutineDispatcher
import kotlinx.coroutines.suspendCancellableCoroutine

@Singleton
class LoadMigrationRestoreStateUseCase
@Inject
constructor(
    private val manager: HealthMigrationManager,
    @IoDispatcher private val dispatcher: CoroutineDispatcher,
) : BaseUseCase<Unit, MigrationRestoreState>(dispatcher) {

    override suspend fun execute(input: Unit): MigrationRestoreState {

        // Gets the data restore state
        val migrationRestoreState = suspendCancellableCoroutine { continuation ->
            manager.getHealthDataState(Runnable::run, continuation.asOutcomeReceiver())
        }

        // Gets the migration UI state
        val migrationUiState =
            suspendCancellableCoroutine { continuation ->
                    manager.getHealthConnectMigrationUiState(
                        Runnable::run,
                        continuation.asOutcomeReceiver(),
                    )
                }
                .healthConnectMigrationUiState

        return MigrationRestoreState(
            migrationUiState =
                migrationUiStateMapping.getOrDefault(migrationUiState, MigrationUiState.IDLE),
            dataRestoreState =
                dataRestoreUiStateMapping.getOrDefault(
                    migrationRestoreState.dataRestoreState,
                    DataRestoreUiState.IDLE,
                ),
            dataRestoreError =
                dataRestoreUiErrorMapping.getOrDefault(
                    migrationRestoreState.dataRestoreError,
                    MigrationRestoreState.DataRestoreUiError.ERROR_NONE,
                ),
        )
    }

    companion object {
        private const val TAG = "LoadMigrationState"

        private val migrationUiStateMapping =
            mapOf(
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_IDLE to MigrationUiState.IDLE,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_ALLOWED_MIGRATOR_DISABLED to
                    MigrationUiState.ALLOWED_MIGRATOR_DISABLED,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_ALLOWED_NOT_STARTED to
                    MigrationUiState.ALLOWED_NOT_STARTED,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_ALLOWED_PAUSED to
                    MigrationUiState.ALLOWED_PAUSED,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_ALLOWED_ERROR to
                    MigrationUiState.ALLOWED_ERROR,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_IN_PROGRESS to
                    MigrationUiState.IN_PROGRESS,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_APP_UPGRADE_REQUIRED to
                    MigrationUiState.APP_UPGRADE_REQUIRED,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_MODULE_UPGRADE_REQUIRED to
                    MigrationUiState.MODULE_UPGRADE_REQUIRED,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_COMPLETE to
                    MigrationUiState.COMPLETE,
                HealthConnectMigrationUiState.MIGRATION_UI_STATE_COMPLETE_IDLE to
                    MigrationUiState.COMPLETE_IDLE,
            )

        private val dataRestoreUiStateMapping =
            mapOf(
                HealthConnectDataState.RESTORE_STATE_IDLE to DataRestoreUiState.IDLE,
                HealthConnectDataState.RESTORE_STATE_PENDING to DataRestoreUiState.PENDING,
                HealthConnectDataState.RESTORE_STATE_IN_PROGRESS to DataRestoreUiState.IN_PROGRESS,
            )

        private val dataRestoreUiErrorMapping =
            mapOf(
                HealthConnectDataState.RESTORE_ERROR_NONE to
                    MigrationRestoreState.DataRestoreUiError.ERROR_NONE,
                HealthConnectDataState.RESTORE_ERROR_UNKNOWN to
                    MigrationRestoreState.DataRestoreUiError.ERROR_UNKNOWN,
                HealthConnectDataState.RESTORE_ERROR_FETCHING_DATA to
                    MigrationRestoreState.DataRestoreUiError.ERROR_FETCHING_DATA,
                HealthConnectDataState.RESTORE_ERROR_VERSION_DIFF to
                    MigrationRestoreState.DataRestoreUiError.ERROR_VERSION_DIFF,
            )
    }
}