import {getMetadataArgsStorage} from "../../../index";
import {ColumnTypes} from "../../metadata/types/ColumnTypes";
import {ColumnOptions} from "../options/ColumnOptions";
import {ColumnMetadataArgs} from "../../metadata-args/ColumnMetadataArgs";

/**
 * Creates a "level"/"length" column to the table that holds a closure table.
 */
export function TreeLevelColumn(): Function {
    return function (object: Object, propertyName: string) {

        const reflectedType = ColumnTypes.typeToString((Reflect as any).getMetadata("design:type", object, propertyName));

        // implicitly set a type, because this column's type cannot be anything else except number
        const options: ColumnOptions = { type: ColumnTypes.INTEGER };

        // create and register a new column metadata
        const args: ColumnMetadataArgs = {
            target: object.constructor,
            propertyName: propertyName,
            propertyType: reflectedType,
            mode: "treeLevel",
            options: options
        };
        getMetadataArgsStorage().columns.add(args);
    };
}