import DB_HANDLER from "../../../utils/backend/global-db/DB_HANDLER";
import DSQL_USER_DB_HANDLER from "../../../utils/backend/global-db/DSQL_USER_DB_HANDLER";
import LOCAL_DB_HANDLER from "../../../utils/backend/global-db/LOCAL_DB_HANDLER";

type Param = {
    dbContext?: string;
    paradigm?: "Read Only" | "Full Access";
    dbFullName: string;
    tableName: string;
    tableSchema?: import("../../../types").DSQL_TableSchemaType;
    identifierColumnName: string;
    identifierValue: string | number;
    useLocal?: boolean;
};

/**
 * # Delete DB Entry Function
 * @description
 */
export default async function deleteDbEntry({
    dbContext,
    paradigm,
    dbFullName,
    tableName,
    identifierColumnName,
    identifierValue,
    useLocal,
}: Param): Promise<object | null> {
    try {
        const isMaster = useLocal
            ? true
            : dbContext?.match(/dsql.user/i)
            ? false
            : dbFullName && !dbFullName.match(/^datasquirel$/)
            ? false
            : true;

        /** @type { (a1:any, a2?:any) => any } */
        const dbHandler: (a1: any, a2?: any) => any = useLocal
            ? LOCAL_DB_HANDLER
            : isMaster
            ? DB_HANDLER
            : DSQL_USER_DB_HANDLER;

        /**
         * Execution
         *
         * @description
         */
        const query = `DELETE FROM ${tableName} WHERE \`${identifierColumnName}\`=?`;

        const deletedEntry = isMaster
            ? await dbHandler(query, [identifierValue])
            : await dbHandler({
                  paradigm,
                  queryString: query,
                  database: dbFullName,
                  queryValues: [identifierValue],
              });

        /**
         * Return statement
         */
        return deletedEntry;
    } catch (error) {
        return null;
    }
}