/*
 * Copyright (c) 2018 VMware, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
 * associated documentation files (the "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
 * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
// The implementation is derived from https://github.com/awslabs/amazon-kinesis-client
/*
 * Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Amazon Software License (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/asl/
 *
 * or in the "license" file accompanying this file. This file 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 config

import (
	"time"
	"vmware.com/cascade-kinesis-client/clientlibrary/utils"
)

// NewKinesisClientLibConfig to create a default KinesisClientLibConfiguration based on the required fields.
func NewKinesisClientLibConfig(applicationName, streamName, regionName, workerID string) *KinesisClientLibConfiguration {
	checkIsValueNotEmpty("ApplicationName", applicationName)
	checkIsValueNotEmpty("StreamName", streamName)
	checkIsValueNotEmpty("RegionName", regionName)

	if empty(workerID) {
		workerID = utils.MustNewUUID()
	}

	// populate the KCL configuration with default values
	return &KinesisClientLibConfiguration{
		ApplicationName:                                  applicationName,
		TableName:                                        applicationName,
		StreamName:                                       streamName,
		RegionName:                                       regionName,
		WorkerID:                                         workerID,
		InitialPositionInStream:                          DEFAULT_INITIAL_POSITION_IN_STREAM,
		InitialPositionInStreamExtended:                  *newInitialPosition(DEFAULT_INITIAL_POSITION_IN_STREAM),
		FailoverTimeMillis:                               DEFAULT_FAILOVER_TIME_MILLIS,
		MaxRecords:                                       DEFAULT_MAX_RECORDS,
		IdleTimeBetweenReadsInMillis:                     DEFAULT_IDLETIME_BETWEEN_READS_MILLIS,
		CallProcessRecordsEvenForEmptyRecordList:         DEFAULT_DONT_CALL_PROCESS_RECORDS_FOR_EMPTY_RECORD_LIST,
		ParentShardPollIntervalMillis:                    DEFAULT_PARENT_SHARD_POLL_INTERVAL_MILLIS,
		ShardSyncIntervalMillis:                          DEFAULT_SHARD_SYNC_INTERVAL_MILLIS,
		CleanupTerminatedShardsBeforeExpiry:              DEFAULT_CLEANUP_LEASES_UPON_SHARDS_COMPLETION,
		TaskBackoffTimeMillis:                            DEFAULT_TASK_BACKOFF_TIME_MILLIS,
		MetricsBufferTimeMillis:                          DEFAULT_METRICS_BUFFER_TIME_MILLIS,
		MetricsMaxQueueSize:                              DEFAULT_METRICS_MAX_QUEUE_SIZE,
		ValidateSequenceNumberBeforeCheckpointing:        DEFAULT_VALIDATE_SEQUENCE_NUMBER_BEFORE_CHECKPOINTING,
		ShutdownGraceMillis:                              DEFAULT_SHUTDOWN_GRACE_MILLIS,
		MaxLeasesForWorker:                               DEFAULT_MAX_LEASES_FOR_WORKER,
		MaxLeasesToStealAtOneTime:                        DEFAULT_MAX_LEASES_TO_STEAL_AT_ONE_TIME,
		InitialLeaseTableReadCapacity:                    DEFAULT_INITIAL_LEASE_TABLE_READ_CAPACITY,
		InitialLeaseTableWriteCapacity:                   DEFAULT_INITIAL_LEASE_TABLE_WRITE_CAPACITY,
		SkipShardSyncAtWorkerInitializationIfLeasesExist: DEFAULT_SKIP_SHARD_SYNC_AT_STARTUP_IF_LEASES_EXIST,
	}
}

// WithTableName to provide alternative lease table in DynamoDB
func (c *KinesisClientLibConfiguration) WithTableName(tableName string) *KinesisClientLibConfiguration {
	c.TableName = tableName
	return c
}

func (c *KinesisClientLibConfiguration) WithInitialPositionInStream(initialPositionInStream InitialPositionInStream) *KinesisClientLibConfiguration {
	c.InitialPositionInStream = initialPositionInStream
	c.InitialPositionInStreamExtended = *newInitialPosition(initialPositionInStream)
	return c
}

func (c *KinesisClientLibConfiguration) WithTimestampAtInitialPositionInStream(timestamp *time.Time) *KinesisClientLibConfiguration {
	c.InitialPositionInStream = AT_TIMESTAMP
	c.InitialPositionInStreamExtended = *newInitialPositionAtTimestamp(timestamp)
	return c
}

func (c *KinesisClientLibConfiguration) WithFailoverTimeMillis(failoverTimeMillis int) *KinesisClientLibConfiguration {
	checkIsValuePositive("FailoverTimeMillis", failoverTimeMillis)
	c.FailoverTimeMillis = failoverTimeMillis
	return c
}

func (c *KinesisClientLibConfiguration) WithShardSyncIntervalMillis(shardSyncIntervalMillis int) *KinesisClientLibConfiguration {
	checkIsValuePositive("ShardSyncIntervalMillis", shardSyncIntervalMillis)
	c.ShardSyncIntervalMillis = shardSyncIntervalMillis
	return c
}

func (c *KinesisClientLibConfiguration) WithMaxRecords(maxRecords int) *KinesisClientLibConfiguration {
	checkIsValuePositive("MaxRecords", maxRecords)
	c.MaxRecords = maxRecords
	return c
}

// WithMaxLeasesForWorker configures maximum lease this worker can handles. It determines how maximun number of shards
// this worker can handle.
func (c *KinesisClientLibConfiguration) WithMaxLeasesForWorker(n int) *KinesisClientLibConfiguration {
	checkIsValuePositive("MaxLeasesForWorker", n)
	c.MaxLeasesForWorker = n
	return c
}

/**
 * Controls how long the KCL will sleep if no records are returned from Kinesis
 *
 * <p>
 * This value is only used when no records are returned; if records are returned, the {@link com.amazonaws.services.kinesis.clientlibrary.lib.worker.ProcessTask} will
 * immediately retrieve the next set of records after the call to
 * {@link com.amazonaws.services.kinesis.clientlibrary.interfaces.v2.IRecordProcessor#processRecords(ProcessRecordsInput)}
 * has returned. Setting this value to high may result in the KCL being unable to catch up. If you are changing this
 * value it's recommended that you enable {@link #withCallProcessRecordsEvenForEmptyRecordList(boolean)}, and
 * monitor how far behind the records retrieved are by inspecting
 * {@link com.amazonaws.services.kinesis.clientlibrary.types.ProcessRecordsInput#getMillisBehindLatest()}, and the
 * <a href=
 * "http://docs.aws.amazon.com/streams/latest/dev/monitoring-with-cloudwatch.html#kinesis-metrics-stream">CloudWatch
 * Metric: GetRecords.MillisBehindLatest</a>
 * </p>
 *
 * @param IdleTimeBetweenReadsInMillis
 *            how long to sleep between GetRecords calls when no records are returned.
 * @return KinesisClientLibConfiguration
 */
func (c *KinesisClientLibConfiguration) WithIdleTimeBetweenReadsInMillis(idleTimeBetweenReadsInMillis int) *KinesisClientLibConfiguration {
	checkIsValuePositive("IdleTimeBetweenReadsInMillis", idleTimeBetweenReadsInMillis)
	c.IdleTimeBetweenReadsInMillis = idleTimeBetweenReadsInMillis
	return c
}

func (c *KinesisClientLibConfiguration) WithCallProcessRecordsEvenForEmptyRecordList(callProcessRecordsEvenForEmptyRecordList bool) *KinesisClientLibConfiguration {
	c.CallProcessRecordsEvenForEmptyRecordList = callProcessRecordsEvenForEmptyRecordList
	return c
}

func (c *KinesisClientLibConfiguration) WithTaskBackoffTimeMillis(taskBackoffTimeMillis int) *KinesisClientLibConfiguration {
	checkIsValuePositive("TaskBackoffTimeMillis", taskBackoffTimeMillis)
	c.TaskBackoffTimeMillis = taskBackoffTimeMillis
	return c
}

// WithMetricsBufferTimeMillis configures Metrics are buffered for at most this long before publishing to CloudWatch
func (c *KinesisClientLibConfiguration) WithMetricsBufferTimeMillis(metricsBufferTimeMillis int) *KinesisClientLibConfiguration {
	checkIsValuePositive("MetricsBufferTimeMillis", metricsBufferTimeMillis)
	c.MetricsBufferTimeMillis = metricsBufferTimeMillis
	return c
}

// WithMetricsMaxQueueSize configures Max number of metrics to buffer before publishing to CloudWatch
func (c *KinesisClientLibConfiguration) WithMetricsMaxQueueSize(metricsMaxQueueSize int) *KinesisClientLibConfiguration {
	checkIsValuePositive("MetricsMaxQueueSize", metricsMaxQueueSize)
	c.MetricsMaxQueueSize = metricsMaxQueueSize
	return c
}