package query

import (
	"context"
	"gotemplate/internal/database"
	"gotemplate/internal/database/repository"

	"github.com/google/uuid"
	"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, query Query) error {
	requiredQueryIDs := []uuid.UUID{}
	for _, entry := range *q.collectorQueries {
		if entry.ID == query.ID && entry.RequiredQueryID != uuid.Nil {
			requiredQueryIDs = append(requiredQueryIDs, entry.RequiredQueryID)
		}
	}

	resultIDs := make([]pgtype.UUID, len(requiredQueryIDs))
	for index, id := range 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.ListResultValuesByID(ctx, resultIDs)
	if err != nil {
		return err
	}

	cleanValues := make([]ResultValue, len(values))
	for _, result := range values {
		cleanValue := q.parseResultValue(result)
		cleanValues = append(cleanValues, cleanValue)
	}

	err = q.getResult(ctx, query, &cleanValues)
	if err != nil {
		return err
	}

	return nil
}

func (q *Queue) parseResultValue(result repository.ListResultValuesByIDRow) ResultValue {
	return ResultValue{
		ID:      database.MustToUUID(result.ID),
		QueryID: database.MustToUUID(result.Queryid),
		Value:   result.Value,
	}
}

func (q *Queue) getResult(ctx context.Context, query Query, resultValues *[]ResultValue) error {
	value, err := q.prepareResult(ctx, query, resultValues)
	if err != nil {
		return err
	}

	id := uuid.New()

	err = q.db.SetResult(ctx, repository.SetResultParams{
		ID:           database.MustToDBUUID(id),
		Queryid:      database.MustToDBUUID(query.ID),
		Documentid:   database.MustToDBUUID(q.documentId),
		Value:        value,
		Cleanversion: q.cleanVersion,
		Textversion:  q.textVersion,
		Queryversion: query.Version,
	})
	if err != nil {
		return err
	}

	*q.results = append(*q.results, Result{
		ID:           id,
		QueryID:      query.ID,
		QueryVersion: query.Version,
	})

	return nil
}