;(function (exports) {
'use strict';

  var OAUTH3 = exports.OAUTH3 = exports.OAUTH3 || require('./oauth3.implicit.js').OAUTH3;

  OAUTH3._base64.btoa = function (b64) {
    // http://stackoverflow.com/questions/9677985/uncaught-typeerror-illegal-invocation-in-chrome
    return (exports.btoa || require('btoa'))(b64);
  };
  OAUTH3._base64.encodeUrlSafe = function (b64) {
    // Base64 to URL-safe Base64
    b64 = b64.replace(/\+/g, '-').replace(/\//g, '_');
    b64 = b64.replace(/=+/g, '');
    return OAUTH3._base64.btoa(b64);
  };

  OAUTH3.jwt.encode = function (parts) {
    parts.header = parts.header || { alg: 'none', typ: 'jwt' };
    parts.signature = parts.signature || '';

    var result = [
      OAUTH3._base64.encodeUrlSafe(JSON.stringify(parts.header, null))
    , OAUTH3._base64.encodeUrlSafe(JSON.stringify(parts.payload, null))
    , parts.signature // should already be url-safe base64
    ].join('.');

    return result;
  };

  OAUTH3.authn.resourceOwnerPassword = OAUTH3.authz.resourceOwnerPassword = function (directive, opts) {
    var providerUri = directive.issuer;

    if (opts.mockError) {
      return OAUTH3.PromiseA.resolve({data: {error_description: "fake error", error: "errorcode", error_uri: "https://blah"}});
    }

    return OAUTH3._mockToken(providerUri, opts);
  };
  OAUTH3.authn.loginMeta = function (directive, opts) {
    if (opts.mockError) {
      return OAUTH3.PromiseA.resolve({ data: { error: { message: "Yikes!", code: 'E' } } });
    }
    return OAUTH3.PromiseA.resolve({ data: {} });
  };
  OAUTH3.authn.otp = function (directive, opts) {
    if (opts.mockError) {
      return OAUTH3.PromiseA.resolve({data: {error: {message: "Yikes!", code: 'E'}}});
    }
    return OAUTH3.PromiseA.resolve({data: {uuid: "uuidblah"}});
  };

  OAUTH3.authz.scopes = function () {
    return {
      pending: ['oauth3_authn']   // not yet accepted
    , granted: []                 // all granted, ever
    , requested: ['oauth3_authn'] // all requested, now
    , accepted: []                // granted (ever) and requested (now)
    };
  };
  OAUTH3.authz.grants = function (providerUri, opts) {
    if ('POST' === opts.method) {
      return OAUTH3._mockToken(providerUri, opts);
    }

    return OAUTH3.discover(providerUri, {
      client_id: providerUri
    , debug: opts.debug
    }).then(function (directive) {
      return {
        client: {
          name: "foo"
        , client_id: "localhost.foo.daplie.me:8443"
        , url: "https://localhost.foo.daplie.me:8443"
        }
      , grants: []
      };
    });
  };

  OAUTH3._refreshToken = function (providerUri, opts) {
    return OAUTH3._mockToken(providerUri, opts);
  };

  OAUTH3._mockToken = function (providerUri, opts) {
    var accessToken = OAUTH3.jwt.encode({
      header: { alg: 'none' }
    , payload: { exp: Math.round(Date.now() / 1000) + 900, sub: 'fakeUserId', scp: opts.scope }
    , signature: "fakeSig"
    });

    return OAUTH3.hooks.session.refresh(
      opts.session || {
        provider_uri: providerUri
      , client_id: opts.client_id
      , client_uri: opts.client_uri || opts.clientUri
      }
    , { access_token: accessToken
      , refresh_token: accessToken
      , expires_in: "900"
      , scope: opts.scope
      }
    );
  };

}('undefined' !== typeof exports ? exports : window));