package queryqueue

import (
	"context"
	"queryorchestration/internal/database"
	queryprocessor "queryorchestration/internal/query/processor"
)

func (q *Queue) getUnsyncedQueries() {
	for _, query := range q.collectorQueries {
		if q.isQuerySynced(query) {
			continue
		}

		q.Add(query)
	}
}

func (q *Queue) isQuerySynced(query *queryprocessor.Query) bool {
	for _, result := range q.results {
		if result.QueryID == query.ID && result.QueryVersion == query.Version {
			return true
		}
	}

	return false
}

func (c *Queue) getCollectorQueries(ctx context.Context) error {
	if c.collectorQueries != nil {
		return nil
	}

	id := database.MustToDBUUID(c.collector.ID)

	queries, err := c.db.Queries.ListCollectorQueries(ctx, id)
	if err != nil {
		return err
	}

	cleanQueries := make([]*queryprocessor.Query, len(queries))
	for index, dbQuery := range queries {
		cleanQuery, err := queryprocessor.ParseDBCollectorQuery(dbQuery)
		if err != nil {
			return err
		}

		cleanQueries[index] = cleanQuery
	}

	c.collectorQueries = cleanQueries

	return nil
}

func (q *Queue) Add(qu *queryprocessor.Query) {
	dependentQueries := []*queryprocessor.Query{}
	requiredIndex := -1

	if q.unsyncedQueue == nil {
		q.unsyncedQueue = []*queryprocessor.Query{}
	} else {
		for index, entry := range q.unsyncedQueue {
			if entry.ID == qu.ID {
				return
			}
			if qu.RequiredQueryIDs != nil {
				for _, id := range *qu.RequiredQueryIDs {
					if entry.ID == id {
						requiredIndex = index
						break
					}
				}
			}
		}
	}

	for _, entry := range q.collectorQueries {
		if entry.RequiredQueryIDs != nil {
			for _, id := range *entry.RequiredQueryIDs {
				if qu.ID == id {
					dependentQueries = append(dependentQueries, entry)
					break
				}
			}
		}
	}

	if requiredIndex != -1 {
		q.unsyncedQueue = append((q.unsyncedQueue)[:requiredIndex+1], append([]*queryprocessor.Query{qu}, (q.unsyncedQueue)[requiredIndex+1:]...)...)
	} else {
		q.unsyncedQueue = append([]*queryprocessor.Query{qu}, q.unsyncedQueue...)
	}

	for _, entry := range dependentQueries {
		q.Add(entry)
	}
}