var uuid = require('node-uuid'),
    authCodes = {},
    accessTokens = {},
    tokenHeartbeats = {},
    clients = {
        'F8Nbz9gGUvLgdn8T': {
            id: '1',
            secret: 'Fesmx7hHCCMx7Cby7FhV2fAtf2NYEFzP5fCKuwEEdpf8hpnsnnQn9qYhNHt6SsDD',
            grantTypes: ['client_credentials']
        },
        'dev52VrnSufxEyKT': {
            id: '2',
            secret: 'nK2jnqhdWnrmAFDw9zWVueAqUQvSxmAyjf2Sz7ZrmYVSH5GSxER4rPQCuBUewF',
            grantTypes: ['client_credentials']
        }
    };

const services = {
    flushExpiredTokens: function (maxAge) {
        let oldTokens = [];
        let now = new Date().getTime();
        for (let token in accessTokens) {
            if (tokenHeartbeats[token] && tokenHeartbeats[token] < now - 1000 * maxAge) {
                oldTokens.push(token)
                delete accessTokens[token]
            }
        }
        console.log('Flush expired tokens execution completed.', oldTokens)
    },
    getAccessTokens: function () {
        return accessTokens;
    },
    getClients: function () {
        return clients;
    },
    heartbeat: {
        puls: function (token) {
            tokenHeartbeats[token] = new Date().getTime();
        },
        signal: function (authHeader) {
            if (authHeader) {
                let token = authHeader.split(' ').pop()
                if (accessTokens[token]) {
                    services.heartbeat.puls(token)
                    return tokenHeartbeats[token];
                }
            }
            return false;
        }
    },
    clientService: {
        getById: function (id, callback) {
            return callback(null, clients[id]);
        },
        isValidRedirectUri: function (/*client, requestedUri*/) {
            return true;
        }
    },
    tokenService: {
        generateToken: function (callback) {
            callback(null, uuid.v4());
        },
        generateAuthorizationCode: function (callback) {
            callback(null, uuid.v4());
        }
    },
    authorizationService: {
        saveAuthorizationCode: function (codeData, callback) {
            authCodes[codeData.code] = codeData;
            return callback(null, authCodes[codeData.code]);
        },
        saveAccessToken: function (tokenData, callback) {
            accessTokens[tokenData.access_token] = tokenData;
            return callback(null, accessTokens[tokenData.access_token]);
        },
        getAuthorizationCode: function (code, callback) {
            return callback(null, authCodes[code]);
        },
        getAccessToken: function (token, callback) {
            return callback(null, accessTokens[token]);
        }
    },
    membershipService: {
        areUserCredentialsValid: function (userName, password, scope, callback) {
            return callback(null, true);
        }
    }
}
module.exports = services