/*
    Copyright 2012 Rustici Software

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

/**
TinCan client library

@module TinCan
@submodule TinCan.Agent
**/
(function () {
    "use strict";

    /**
    @class TinCan.Agent
    @constructor
    */
    var Agent = TinCan.Agent = function (cfg) {
        this.log("constructor");

        /**
        @property name
        @type String
        */
        this.name = null;

        /**
        @property mbox
        @type String
        */
        this.mbox = null;

        /**
        @property mbox_sha1sum
        @type String
        */
        this.mbox_sha1sum = null;

        /**
        @property openid
        @type String
        */
        this.openid = null;

        /**
        @property account
        @type TinCan.AgentAccount
        */
        this.account = null;

        /**
        @property degraded
        @type Boolean
        @default false
        */
        this.degraded = false;

        this.init(cfg);
    };
    Agent.prototype = {
        /**
        @property objectType
        @type String
        @default Agent
        */
        objectType: "Agent",

        /**
        @property LOG_SRC
        */
        LOG_SRC: "Agent",

        /**
        @method log
        */
        log: TinCan.prototype.log,

        /**
        @method init
        @param {Object} [options] Configuration used to initialize
        */
        init: function (cfg) {
            this.log("init");
            var i,
                directProps = [
                    "name",
                    "mbox",
                    "mbox_sha1sum",
                    "openid"
                ],
                val
            ;

            cfg = cfg || {};

            // handle .9 split names and array properties into single interface
            if (typeof cfg.lastName !== "undefined" || typeof cfg.firstName !== "undefined") {
                cfg.name = "";
                if (typeof cfg.firstName !== "undefined" && cfg.firstName.length > 0) {
                    cfg.name = cfg.firstName[0];
                    if (cfg.firstName.length > 1) {
                        this.degraded = true;
                    }
                }

                if (cfg.name !== "") {
                    cfg.name += " ";
                }

                if (typeof cfg.lastName !== "undefined" && cfg.lastName.length > 0) {
                    cfg.name += cfg.lastName[0];
                    if (cfg.lastName.length > 1) {
                        this.degraded = true;
                    }
                }
            } else if (typeof cfg.familyName !== "undefined" || typeof cfg.givenName !== "undefined") {
                cfg.name = "";
                if (typeof cfg.givenName !== "undefined" && cfg.givenName.length > 0) {
                    cfg.name = cfg.givenName[0];
                    if (cfg.givenName.length > 1) {
                        this.degraded = true;
                    }
                }

                if (cfg.name !== "") {
                    cfg.name += " ";
                }

                if (typeof cfg.familyName !== "undefined" && cfg.familyName.length > 0) {
                    cfg.name += cfg.familyName[0];
                    if (cfg.familyName.length > 1) {
                        this.degraded = true;
                    }
                }
            }

            if (typeof cfg.name === "object" && cfg.name !== null) {
                if (cfg.name.length > 1) {
                    this.degraded = true;
                }
                cfg.name = cfg.name[0];
            }
            if (typeof cfg.mbox === "object" && cfg.mbox !== null) {
                if (cfg.mbox.length > 1) {
                    this.degraded = true;
                }
                cfg.mbox = cfg.mbox[0];
            }
            if (typeof cfg.mbox_sha1sum === "object" && cfg.mbox_sha1sum !== null) {
                if (cfg.mbox_sha1sum.length > 1) {
                    this.degraded = true;
                }
                cfg.mbox_sha1sum = cfg.mbox_sha1sum[0];
            }
            if (typeof cfg.openid === "object" && cfg.openid !== null) {
                if (cfg.openid.length > 1) {
                    this.degraded = true;
                }
                cfg.openid = cfg.openid[0];
            }
            if (typeof cfg.account === "object" && cfg.account !== null && typeof cfg.account.homePage === "undefined" && typeof cfg.account.name === "undefined") {
                if (cfg.account.length === 0) {
                    delete cfg.account;
                }
                else {
                    if (cfg.account.length > 1) {
                        this.degraded = true;
                    }
                    cfg.account = cfg.account[0];
                }
            }

            if (cfg.hasOwnProperty("account")) {
                if (cfg.account instanceof TinCan.AgentAccount) {
                    this.account = cfg.account;
                }
                else {
                    this.account = new TinCan.AgentAccount (cfg.account);
                }
            }

            for (i = 0; i < directProps.length; i += 1) {
                if (cfg.hasOwnProperty(directProps[i]) && cfg[directProps[i]] !== null) {
                    val = cfg[directProps[i]];
                    if (directProps[i] === "mbox" && val.indexOf("mailto:") === -1) {
                        val = "mailto:" + val;
                    }
                    this[directProps[i]] = val;
                }
            }
        },

        toString: function () {
            this.log("toString");

            if (this.name !== null) {
                return this.name;
            }
            if (this.mbox !== null) {
                return this.mbox.replace("mailto:", "");
            }
            if (this.mbox_sha1sum !== null) {
                return this.mbox_sha1sum;
            }
            if (this.openid !== null) {
                return this.openid;
            }
            if (this.account !== null) {
                return this.account.toString();
            }

            return this.objectType + ": unidentified";
        },

        /**
        While a TinCan.Agent instance can store more than one inverse functional identifier
        this method will always only output one to be compliant with the statement sending
        specification. Order of preference is: mbox, mbox_sha1sum, openid, account

        @method asVersion
        @param {String} [version] Version to return (defaults to newest supported)
        */
        asVersion: function (version) {
            this.log("asVersion: " + version);
            var result = {
                objectType: this.objectType
            };

            version = version || TinCan.versions()[0];

            if (version === "0.9") {
                if (this.mbox !== null) {
                    result.mbox = [ this.mbox ];
                }
                else if (this.mbox_sha1sum !== null) {
                    result.mbox_sha1sum = [ this.mbox_sha1sum ];
                }
                else if (this.openid !== null) {
                    result.openid = [ this.openid ];
                }
                else if (this.account !== null) {
                    result.account = [ this.account.asVersion(version) ];
                }

                if (this.name !== null) {
                    result.name = [ this.name ];
                }
            } else {
                if (this.mbox !== null) {
                    result.mbox = this.mbox;
                }
                else if (this.mbox_sha1sum !== null) {
                    result.mbox_sha1sum = this.mbox_sha1sum;
                }
                else if (this.openid !== null) {
                    result.openid = this.openid;
                }
                else if (this.account !== null) {
                    result.account = this.account.asVersion(version);
                }

                if (this.name !== null) {
                    result.name = this.name;
                }
            }

            return result;
        }
    };

    /**
    @method fromJSON
    @return {Object} Agent
    @static
    */
    Agent.fromJSON = function (agentJSON) {
        Agent.prototype.log("fromJSON");
        var _agent = JSON.parse(agentJSON);

        return new Agent(_agent);
    };
}());