import {ValidationMetadataArgs} from "./ValidationMetadataArgs";
import {ValidationArguments} from "../validation/ValidationArguments";

/**
 * This metadata contains validation rules.
 */
export class ValidationMetadata {

    // -------------------------------------------------------------------------
    // Properties
    // -------------------------------------------------------------------------

    /**
     * Validation type.
     */
    type: string;

    /**
     * Target class to which this validation is applied.
     */
    target: Function|string;

    /**
     * Property of the object to be validated.
     */
    propertyName: string;

    /**
     * Constraint class that performs validation. Used only for custom validations.
     */
    constraintCls: Function;

    /**
     * Array of constraints of this validation.
     */
    constraints: any[];

    /**
     * Validation message to be shown in the case of error.
     */
    message: string|((args: ValidationArguments) => string);

    /**
     * Validation groups used for this validation.
     */
    groups: string[] = [];

    /**
     * Indicates if validation must be performed always, no matter of validation groups used.
     */
    always: boolean = false;

    /**
     * Specifies if validated value is an array and each of its item must be validated.
     */
    each: boolean = false;

    /*
     * A transient set of data passed through to the validation result for response mapping
     */
    context?: any = undefined;

    /**
     * Extra options specific to validation type.
     */
    validationTypeOptions: any;

    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------

    constructor(args: ValidationMetadataArgs) {
        this.type = args.type;
        this.target = args.target;
        this.propertyName = args.propertyName;
        this.constraints = args.constraints;
        this.constraintCls = args.constraintCls;
        this.validationTypeOptions = args.validationTypeOptions;
        if (args.validationOptions) {
            this.message = args.validationOptions.message;
            this.groups = args.validationOptions.groups;
            this.always = args.validationOptions.always;
            this.each = args.validationOptions.each;
            this.context = args.validationOptions.context;
        }
    }

}