using System;
using System.Collections.Generic;

namespace AsterNET.Manager.Response
{
    /// <summary>
    ///     Represents a response received from the Asterisk server as the result of a
    ///     previously sent ManagerAction.<br />
    ///     The response can be linked with the action that caused it by looking the
    ///     action id attribute that will match the action id of the corresponding
    ///     action.
    /// </summary>
    public class ManagerResponse : IParseSupport
    {
        private string actionId;
        protected Dictionary<string, string> attributes;
        private DateTime dateReceived;
        private string message;
        private string privilege;
        private string response;
        private string server;
        private string uniqueId;

        #region Constructor - ManagerEvent() 

        public ManagerResponse()
        {
            this.dateReceived = DateTime.Now;
        }

        public ManagerResponse(Dictionary<string, string> attributes)
            : this()
        {
            Helper.SetAttributes(this, attributes);
        }

        #endregion

        #region Attributes 

        /// <summary>
        ///     Store all unknown (without setter) keys from manager event.<br />
        ///     Use in default Parse method <see cref="Parse(string key, string value)" />.
        /// </summary>
        public Dictionary<string, string> Attributes
        {
            get { return attributes; }
        }

        #endregion

        #region Server 

        /// <summary>
        ///     Specify a server to which to send your commands (x.x.x.x or hostname).<br />
        ///     This should match the server name specified in your config file's "host" entry.
        ///     If you do not specify a server, the proxy will pick the first one it finds -- fine in single-server configurations.
        /// </summary>
        public string Server
        {
            get { return this.server; }
            set { this.server = value; }
        }

        #endregion

        #region DateReceived 

        /// <summary>
        ///     Get/Set the point in time this response was received from the asterisk server.
        /// </summary>
        public DateTime DateReceived
        {
            get { return dateReceived; }
            set { this.dateReceived = value; }
        }

        #endregion

        #region Privilege

        /// <summary>
        ///     Get/Set the AMI authorization class of this event.<br />
        ///     This is one or more of system, call, log, verbose, command, agent or user.
        ///     Multiple privileges are separated by comma.<br />
        ///     Note: This property is not available from Asterisk 1.0 servers.
        /// </summary>
        public string Privilege
        {
            get { return privilege; }
            set { this.privilege = value; }
        }

        #endregion

        #region ActionId 

        /// <summary>
        ///     Get/Set the action id received with this response referencing the action that generated this response.
        /// </summary>
        public string ActionId
        {
            get { return actionId; }
            set { this.actionId = value; }
        }

        #endregion

        #region Message 

        /// <summary>
        ///     Get/Set the message received with this response.<br />
        ///     The content depends on the action that generated this response.
        /// </summary>
        public string Message
        {
            get { return message; }
            set { this.message = value; }
        }

        #endregion

        #region Response 

        /// <summary>
        ///     Get/Set the value of the "Response:" line.<br />
        ///     This typically a String like "Success" or "Error" but depends on the action that generated this response.
        /// </summary>
        public string Response
        {
            get { return response; }
            set { this.response = value; }
        }

        #endregion

        #region UniqueId 

        /// <summary>
        ///     Get/Set the unique id received with this response.<br />
        ///     The unique id is used to keep track of channels created by the action sent, for example an OriginateAction.
        /// </summary>
        public string UniqueId
        {
            get { return uniqueId; }
            set { this.uniqueId = value; }
        }

        #endregion

        #region IsSuccess() 

        /// <summary>
        ///     Return true if Response is success
        /// </summary>
        /// <returns></returns>
        public bool IsSuccess()
        {
            return response == "Success";
        }

        #endregion

        #region GetAttribute(string key) 

        /// <summary>
        ///     Returns the value of the attribute with the given key.<br />
        ///     This is particulary important when a response contains special
        ///     attributes that are dependent on the action that has been sent.<br />
        ///     An example of this is the response to the GetVarAction.
        ///     It contains the value of the channel variable as an attribute
        ///     stored under the key of the variable name.<br />
        ///     Example:
        ///     <pre>
        ///         GetVarAction action = new GetVarAction();
        ///         action.setChannel("SIP/1310-22c3");
        ///         action.setVariable("ALERT_INFO");
        ///         ManagerResponse response = connection.SendAction(action);
        ///         String alertInfo = response.getAttribute("ALERT_INFO");
        ///     </pre>
        ///     As all attributes are internally stored in lower case the key is
        ///     automatically converted to lower case before lookup.
        /// </summary>
        /// <param name="key">the key to lookup.</param>
        /// <returns>
        ///     the value of the attribute stored under this key or
        ///     null if there is no such attribute.
        /// </returns>
        public string GetAttribute(string key)
        {
            return (string) attributes[key.ToLower(Helper.CultureInfo)];
        }

        #endregion

        #region Parse(string key, string value) 

        /// <summary>
        ///     Unknown properties parser
        /// </summary>
        /// <param name="key">key name</param>
        /// <param name="value">key value</param>
        /// <returns>true - value parsed, false - can't parse value</returns>
        public virtual bool Parse(string key, string value)
        {
            if (attributes == null)
                attributes = new Dictionary<string, string>();

            if (attributes.ContainsKey(key))
                // Key already presents, add with delimiter
                attributes[key] += string.Concat(Common.LINE_SEPARATOR, value);
            else
                attributes.Add(key, value);
            return true;
        }

        #endregion

        #region ParseSpecial(Dictionary<string, string> attributes)

        /// <summary>
        ///     Unknown properties parser
        /// </summary>
        /// <param name="attributes">dictionary</param>
        /// <returns>updated dictionary</returns>
        public virtual Dictionary<string, string> ParseSpecial(Dictionary<string, string> attributes)
        {
            return attributes;
        }

        #endregion

        #region ToString() 

        public override string ToString()
        {
            return Helper.ToString(this);
        }

        #endregion
    }
}