import ifm = require('./interfaces');

export class BasicCredentialHandler implements ifm.IRequestHandler {
    username: string;
    password: string;

    constructor(username: string, password: string) {
        this.username = username;
        this.password = password;
    }

    prepareRequest(options:any): void {
        options.headers['Authorization'] = 'Basic ' + new Buffer(this.username + ':' + this.password).toString('base64');
    }

    // This handler cannot handle 401
    canHandleAuthentication(response: ifm.IHttpClientResponse): boolean {
        return false;
    }

    handleAuthentication(httpClient: ifm.IHttpClient, requestInfo: ifm.IRequestInfo, objs): Promise<ifm.IHttpClientResponse> {
        return null;
    }
}

export class BearerCredentialHandler implements ifm.IRequestHandler {
    token: string;

    constructor(token: string) {
        this.token = token;
    }

    // currently implements pre-authorization
    // TODO: support preAuth = false where it hooks on 401
    prepareRequest(options:any): void {
        options.headers['Authorization'] = 'Bearer ' + this.token;
    }

    // This handler cannot handle 401
    canHandleAuthentication(response: ifm.IHttpClientResponse): boolean {
        return false;
    }

    handleAuthentication(httpClient: ifm.IHttpClient, requestInfo: ifm.IRequestInfo, objs): Promise<ifm.IHttpClientResponse> {
        return null;
    }
}

export class PersonalAccessTokenCredentialHandler implements ifm.IRequestHandler {
    token: string;

    constructor(token: string) {
        this.token = token;
    }

    // currently implements pre-authorization
    // TODO: support preAuth = false where it hooks on 401
    prepareRequest(options:any): void {
        options.headers['Authorization'] = 'Basic ' + new Buffer('PAT:' + this.token).toString('base64');
    }

    // This handler cannot handle 401
    canHandleAuthentication(response: ifm.IHttpClientResponse): boolean {
        return false;
    }

    handleAuthentication(httpClient: ifm.IHttpClient, requestInfo: ifm.IRequestInfo, objs): Promise<ifm.IHttpClientResponse> {
        return null;
    }
}