import _ from "lodash";
import type {
    BUN_SQLITE_DatabaseSchemaType,
    BUN_SQLITE_TableSchemaType,
} from "../../types";

type Params = {
    table: BUN_SQLITE_TableSchemaType;
    db_schema: BUN_SQLITE_DatabaseSchemaType;
};

/**
 * Resolve a table's effective definition. Tables with `parentTableName`
 * take their structure from the parent. Always returns a copy: the schema
 * objects are never mutated.
 */
export default function resolveTable({
    table,
    db_schema,
}: Params): BUN_SQLITE_TableSchemaType {
    if (!table.parentTableName) {
        return _.cloneDeep(table);
    }

    const parent_table = db_schema.tables.find(
        (t) => t.tableName === table.parentTableName,
    );

    if (!parent_table) {
        throw new Error(
            `Parent table \`${table.parentTableName}\` not found for \`${table.tableName}\``,
        );
    }

    return _.merge(_.cloneDeep(parent_table), {
        tableName: table.tableName,
        tableDescription: table.tableDescription,
    });
}