import {ValidationSchema} from "./ValidationSchema";
import {ValidationMetadata} from "../metadata/ValidationMetadata";
import {ValidationMetadataArgs} from "../metadata/ValidationMetadataArgs";
import {ValidationOptions} from "../decorator/ValidationOptions";
import {ValidationTypes} from "../validation/ValidationTypes";

/**
 * Used to transform validation schemas to validation metadatas.
 */
export class ValidationSchemaToMetadataTransformer {

    transform(schema: ValidationSchema): ValidationMetadata[] {
        const metadatas: ValidationMetadata[] = [];
        Object.keys(schema.properties).forEach(property => {
            schema.properties[property].forEach(validation => {
                const validationOptions: ValidationOptions = {
                    message: validation.message,
                    groups: validation.groups,
                    always: validation.always,
                    each: validation.each
                };
                const args: ValidationMetadataArgs = {
                    type: validation.type,
                    target: schema.name,
                    propertyName: property,
                    constraints: validation.constraints,
                    validationTypeOptions: validation.options,
                    validationOptions: validationOptions
                };
                metadatas.push(new ValidationMetadata(args));
            });
        });
        return metadatas;
    }

}