//
// Copyright Amazon.com Inc. or its affiliates.
// All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//

import Foundation
import Amplify
import AWSPluginsCore

extension DataStoreConfiguration {

    public static let defaultSyncInterval: TimeInterval = .hours(24)
    public static let defaultSyncMaxRecords: UInt = 10_000
    public static let defaultSyncPageSize: UInt = 1_000

    /// Creates a custom configuration. The only required property is `conflictHandler`.
    ///
    /// - Parameters:
    ///   - errorHandler: a callback function called on unhandled errors
    ///   - conflictHandler: a callback called when a conflict could not be resolved by the service
    ///   - syncInterval: how often the sync engine will run (in seconds)
    ///   - syncMaxRecords: the number of records to sync per execution
    ///   - syncPageSize: the page size of each sync execution
    ///   - authModeStrategy: authorization strategy (.default | multiauth)
    /// - Returns: an instance of `DataStoreConfiguration` with the passed parameters.
    public static func custom(
        errorHandler: @escaping DataStoreErrorHandler = { error in
            Amplify.Logging.error(error: error)
        },
        conflictHandler: @escaping DataStoreConflictHandler = { _, resolve  in
            resolve(.applyRemote)
        },
        syncInterval: TimeInterval = DataStoreConfiguration.defaultSyncInterval,
        syncMaxRecords: UInt = DataStoreConfiguration.defaultSyncMaxRecords,
        syncPageSize: UInt = DataStoreConfiguration.defaultSyncPageSize,
        syncExpressions: [DataStoreSyncExpression] = [],
        authModeStrategy: AuthModeStrategyType = .default
    ) -> DataStoreConfiguration {
        return DataStoreConfiguration(errorHandler: errorHandler,
                                      conflictHandler: conflictHandler,
                                      syncInterval: syncInterval,
                                      syncMaxRecords: syncMaxRecords,
                                      syncPageSize: syncPageSize,
                                      syncExpressions: syncExpressions,
                                      authModeStrategy: authModeStrategy)
    }

    /// The default configuration.
    public static var `default`: DataStoreConfiguration {
        .custom()
    }

}