package queryqueue

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

	"github.com/jackc/pgx/v5/pgtype"
)

func (q *Queue) Execute(ctx context.Context) error {
	if q.unsyncedQueue == nil {
		return nil
	}

	for _, query := range q.unsyncedQueue {
		err := q.executeQuery(ctx, query)
		if err != nil {
			return err
		}
	}

	q.unsyncedQueue = nil

	return nil
}

func (q *Queue) executeQuery(ctx context.Context, qu *queryprocessor.Query) error {
	resultIDs := make([]pgtype.UUID, len(qu.RequiredQueryIDs))
	for index, id := range qu.RequiredQueryIDs {
		var queryVersion int32
		for _, entry := range q.collectorQueries {
			if entry.ID == id {
				queryVersion = entry.Version
				break
			}
		}

		for _, entry := range q.results {
			if entry.QueryID == id && entry.QueryVersion == queryVersion {
				resultIDs[index] = database.MustToDBUUID(entry.ID)
				break
			}
		}
	}

	values, err := q.db.Queries.ListResultValuesByID(ctx, resultIDs)
	if err != nil {
		return err
	}

	cleanValues := make([]result.Value, len(values))
	for index, r := range values {
		cleanValue, err := q.getResultValue(r)
		if err != nil {
			return err
		}

		cleanValues[index] = cleanValue
	}

	err = q.setResult(ctx, qu, cleanValues)
	if err != nil {
		return err
	}

	return nil
}