package neo4j

import (
	"context"
	"git.dragse.it/anthrove/e621-sdk-go/pkg/e621/model"
	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
)

func CreateUserNode(ctx context.Context, driver neo4j.DriverWithContext, user model.User) error {
	query := `
		MERGE (u:e621User {e621ID: $id, e621Username: $name});
	`
	params := map[string]interface{}{
		"id":   user.ID,
		"name": user.Name,
	}

	_, err := neo4j.ExecuteQuery(ctx, driver, query, params, neo4j.EagerResultTransformer)
	if err != nil {
		return err
	}
	return nil
}

func GetUserFavoritesCount(ctx context.Context, driver neo4j.DriverWithContext, userID model.UserID) (int64, error) {
	var userFavoriteCount int64

	query := `
		MATCH (:e621User {e621ID: $userID})-[:IS_FAVORITE]->(:e621Post)
		RETURN count(*) AS numberOfFavoritedPosts;
	`
	params := map[string]interface{}{
		"userID": userID,
	}

	result, err := neo4j.ExecuteQuery(ctx, driver, query, params, neo4j.EagerResultTransformer)
	if err != nil {
		return 0, err
	}

	if len(result.Records) == 0 {
		// no matches -> user does not exist, return count 0
		return userFavoriteCount, err
	}

	record := result.Records[0]

	userFavoriteCount, _, err = neo4j.GetRecordValue[int64](record, "numberOfFavoritedPosts")
	if err != nil {
		return userFavoriteCount, err
	}

	return userFavoriteCount, nil
}