package kafka

import (
	"fmt"

	v3 "go.signoz.io/signoz/pkg/query-service/model/v3"
)

var defaultStepInterval int64 = 60

func BuildQueryRangeParams(messagingQueue *MessagingQueue, queryContext string) (*v3.QueryRangeParamsV3, error) {

	// ToDo: propagate this through APIs when there are different handlers
	queueType := kafkaQueue

	var cq *v3.CompositeQuery

	chq, err := buildClickHouseQuery(messagingQueue, queueType, queryContext)

	if err != nil {
		return nil, err
	}

	cq, err = buildCompositeQuery(chq, queryContext)

	queryRangeParams := &v3.QueryRangeParamsV3{
		Start:          messagingQueue.Start,
		End:            messagingQueue.End,
		Step:           defaultStepInterval,
		CompositeQuery: cq,
		Version:        "v4",
		FormatForWeb:   true,
	}

	return queryRangeParams, nil
}

func buildClickHouseQuery(messagingQueue *MessagingQueue, queueType string, queryContext string) (*v3.ClickHouseQuery, error) {
	start := messagingQueue.Start
	end := messagingQueue.End
	topic, ok := messagingQueue.Variables["topic"]
	if !ok {
		return nil, fmt.Errorf("invalid type for Topic")
	}

	partition, ok := messagingQueue.Variables["partition"]
	if !ok {
		return nil, fmt.Errorf("invalid type for Partition")
	}

	consumerGroup, ok := messagingQueue.Variables["consumer_group"]
	if !ok {
		return nil, fmt.Errorf("invalid type for consumer group")
	}

	var query string
	if queryContext == "producer" {
		query = generateProducerSQL(start, end, topic, partition, queueType)
	} else if queryContext == "consumer" {
		query = generateConsumerSQL(start, end, topic, partition, consumerGroup, queueType)
	}

	return &v3.ClickHouseQuery{
		Query: query,
	}, nil
}

func buildCompositeQuery(chq *v3.ClickHouseQuery, queryContext string) (*v3.CompositeQuery, error) {
	return &v3.CompositeQuery{
		QueryType:         v3.QueryTypeClickHouseSQL,
		ClickHouseQueries: map[string]*v3.ClickHouseQuery{queryContext: chq},
		PanelType:         v3.PanelTypeTable,
	}, nil
}