import { Component, Injectable, Input } from '@angular/core';
import { Response } from '@angular/http';
import { LocaleService } from './i18n';
import { Observable } from 'rxjs/Observable';



export interface IError {
	code: string | number,
	message: string,
	httpCode?: number
}

export const DEFAULT_APP_ERROR_STATUS_CODE = 418;
export const ERROR_MESSAGE_HEADER = "X-SECURIS-ERROR-MSG";
export const ERROR_CODE_MESSAGE_HEADER = "X-SECURIS-ERROR-CODE";

export class ErrorCodes {
	public static UNEXPECTED_ERROR = 1000;
	public static INVALID_CREDENTIALS = 1001;
	public static UNAUTHORIZED_ACCESS = 1002;
	public static NOT_FOUND = 1003;
	public static INVALID_FORMAT = 1004;
	public static WRONG_STATUS = 1005;

	public static INVALID_LICENSE_REQUEST_DATA = 1100;
	public static LICENSE_NOT_READY_FOR_RENEW = 1101;
	public static LICENSE_DATA_IS_NOT_VALID = 1102;
	public static LICENSE_IS_EXPIRED = 1103;

	public static INVALID_REQUEST_DATA = 1201;
	public static INVALID_REQUEST_DATA_FORMAT = 1202;
	public static BLOCKED_REQUEST_DATA = 1203;
	public static DUPLICATED_REQUEST_DATA = 1204;
	public static NO_AVAILABLE_LICENSES = 1205;

	public static INVALID_DATA = 1301;
}

@Injectable()
export class BasicService {

	constructor(protected $L: LocaleService) { }

	public setViewData(callback: any) {
		setTimeout(callback, 0);
	}

	public processErrorResponse(errorResponse: Response) {
		// In a real world app, we might use a remote logging infrastructure
		var error: IError = <IError>{};
		error.httpCode = errorResponse.status;
		error.code = errorResponse.headers.get(ERROR_CODE_MESSAGE_HEADER) || error.httpCode;

		if (errorResponse.status === 403 /* forbidden */) {
			error.message = this.$L.get('Invalid credentials');
			error.code = ErrorCodes.INVALID_CREDENTIALS;
		} else if (errorResponse.status === 401 /* unauthorized */) {
			error.message = this.$L.get('Action not allowed for current user');
			error.code = ErrorCodes.UNAUTHORIZED_ACCESS;
		} else if (errorResponse.status === 418 /* Teapot */) {
			error.message = errorResponse.headers.get(ERROR_MESSAGE_HEADER) || errorResponse.statusText || this.$L.get('Unknown');
		} else {
			error.message = this.$L.get(`Unexpected error HTTP (${error.httpCode}) accessing to server. Contact with the administrator.`);
		}

		return Observable.throw(error);
	}
}