package config

type kafkaConsumer struct {
	GroupID string `json:"groupid" yaml:"groupid"`
	// OffsetNewest, -1, stands for the log head offset, i.e. the offset that will be
	// assigned to the next message that will be produced to the partition. You
	// can send this to a client's GetOffset method to get this offset, or when
	// calling ConsumePartition to start consuming new messages.
	//
	// OffsetOldest, -2, stands for the oldest offset available on the broker for a
	// partition. You can send this to a client's GetOffset method to get this
	// offset, or when calling ConsumePartition to start consuming from the
	// oldest offset that is still available on the broker.
	InitialOffset int64 `json:"initialoffset" yaml:"initialoffset"`
}

type kafkaProducer struct {
	// NoResponse, 0, doesn't send any response, the TCP ACK is all you get.
	//
	// WaitForLocal, 1, waits for only the local commit to succeed before responding.
	//
	// WaitForAll, -1, waits for all in-sync replicas to commit before responding.
	// The minimum number of in-sync replicas is configured on the broker via
	// the `min.insync.replicas` configuration key.
	RequiredAcks int16 `json:"requiredacks" yaml:"requiredacks"`
	// manual/random/roundrobin/customhash/hash/referencehash/consistentcrchash
	Partitioner     string `json:"partitioner" yaml:"partitioner"`
	ReturnSuccesses bool   `json:"returnsuccesses" yaml:"returnsuccesses"`
	ReturnErrors    bool   `json:"returnerrors" yaml:"returnerrors"`
	// CompressionNone, 0, no compression
	// CompressionGZIP, 1, compression using GZIP
	// CompressionSnappy, 2, compression using snappy
	// CompressionLZ4, 3, compression using LZ4
	// CompressionZSTD, 4, compression using ZSTD
	Compression int8 `json:"compression" yaml:"compression"`
}

type kafkaConfig struct {
	Brokers  []string       `json:"brokers" yaml:"brokers"`
	Topics   []string       `json:"topics" yaml:"topics"`
	Consumer *kafkaConsumer `json:"consumer" yaml:"consumer"`
	Producer *kafkaProducer `json:"producer" yaml:"producer"`
}

func NewKafkaConfig() *kafkaConfig {
	return new(kafkaConfig)
}

func (conf *kafkaConfig) GetBrokers() []string {
	if conf == nil {
		panic("kafka config is nil")
	}
	return conf.Brokers
}

func (conf *kafkaConfig) SetBrokers(brokers []string) {
	if conf == nil {
		panic("kafka config is nil")
	}
	conf.Brokers = brokers
}

func (conf *kafkaConfig) GetTopics() []string {
	if conf == nil {
		panic("kafka config is nil")
	}
	return conf.Topics
}

func (conf *kafkaConfig) SetTopics(topics []string) {
	if conf == nil {
		panic("kafka config is nil")
	}
	conf.Topics = topics
}

func (conf *kafkaConfig) GetConsumer() *kafkaConsumer {
	if conf == nil {
		panic("kafka config is nil")
	}
	return conf.Consumer
}

func (conf *kafkaConfig) InitConsumer() *kafkaConsumer {
	if conf == nil {
		panic("kafka config is nil")
	}
	conf.Consumer = new(kafkaConsumer)
	return conf.Consumer
}

func (conf *kafkaConsumer) GetGroupID() string {
	if conf == nil {
		panic("kafka consumer is nil")
	}
	return conf.GroupID
}

func (conf *kafkaConsumer) SetGroupID(groupID string) {
	if conf == nil {
		panic("kafka consumer is nil")
	}
	conf.GroupID = groupID
}

func (conf *kafkaConsumer) GetInitialOffset() int64 {
	if conf == nil {
		panic("kafka consumer is nil")
	}
	return conf.InitialOffset
}

func (conf *kafkaConsumer) SetInitialOffset(initialOffset int64) {
	if conf == nil {
		panic("kafka consumer is nil")
	}
	if initialOffset != -1 && initialOffset != -2 {
		panic("initialOffset is invalid")
	}
	conf.InitialOffset = initialOffset
}

func (conf *kafkaConfig) GetProducer() *kafkaProducer {
	if conf == nil {
		panic("kafka config is nil")
	}
	return conf.Producer
}

func (conf *kafkaConfig) InitProducer() *kafkaProducer {
	if conf == nil {
		panic("kafka config is nil")
	}
	conf.Producer = new(kafkaProducer)
	return conf.Producer
}

func (conf *kafkaProducer) GetRequiredAcks() int16 {
	if conf == nil {
		panic("kafka producer is nil")
	}
	return conf.RequiredAcks
}

func (conf *kafkaProducer) SetRequiredAcks(requiredAcks int16) {
	if conf == nil {
		panic("kafka producer is nil")
	}
	if requiredAcks < -1 || requiredAcks > 1 {
		panic("requiredAcks is invalid")
	}
	conf.RequiredAcks = requiredAcks
}

func (conf *kafkaProducer) GetPartitioner() string {
	if conf == nil {
		panic("kafka producer is nil")
	}
	return conf.Partitioner
}

func (conf *kafkaProducer) SetPartitioner(partitioner string) {
	if conf == nil {
		panic("kafka producer is nil")
	}
	conf.Partitioner = partitioner
}

func (conf *kafkaProducer) GetReturnSuccesses() bool {
	if conf == nil {
		panic("kafka producer is nil")
	}
	return conf.ReturnSuccesses
}

func (conf *kafkaProducer) SetReturnSuccesses(returnSuccesses bool) {
	if conf == nil {
		panic("kafka producer is nil")
	}
	conf.ReturnSuccesses = returnSuccesses
}

func (conf *kafkaProducer) GetReturnErrors() bool {
	if conf == nil {
		panic("kafka producer is nil")
	}
	return conf.ReturnErrors
}

func (conf *kafkaProducer) SetReturnErrors(returnErrors bool) {
	if conf == nil {
		panic("kafka producer is nil")
	}
	conf.ReturnErrors = returnErrors
}

func (conf *kafkaProducer) GetCompression() int8 {
	if conf == nil {
		panic("kafka producer is nil")
	}
	return conf.Compression
}

func (conf *kafkaProducer) SetCompression(compression int8) {
	if conf == nil {
		panic("kafka producer is nil")
	}
	conf.Compression = compression
}

func kafkaConfigName() string {
	return "kafka.json"
}