using System;
using TINK.Model.Services.CopriApi;
using TINK.Repository;

namespace TINK.Model.Connector
{
    /// <summary>
    /// Connects tink app to copri by getting data from copri and updating tink app model (i.e. bikes, user, ...)
    /// </summary>
    public class Connector : IConnector
    {
        /// <summary>Constructs a copri connector object.</summary>
        /// <param name="activeUri"> Uri to connect to.</param>
        /// <param name="appContextInfo">Provides app related info (app name and version, merchantid) to pass to COPRI.</param>
        /// /// <param name="sessionCookie"> Holds the session cookie.</param>
        /// <param name="p_strMail">Mail of user.</param>
        /// <param name="expiresAfter">Timespan which holds value after which cache expires.</param>
        /// <param name="server"> Provides cached addess to copri.</param>
        public Connector(
            Uri activeUri,
            AppContextInfo appContextInfo,
            string sessionCookie,
            string mail,
            TimeSpan? expiresAfter = null,
            ICachedCopriServer server = null            )
        {
            Command = GetCommand(
                server ?? new CopriProviderHttps(activeUri, appContextInfo.MerchantId, appContextInfo, sessionCookie), 
                sessionCookie, 
                mail);

            Query = GetQuery(
                server ?? new CopriProviderHttps(activeUri, appContextInfo.MerchantId, appContextInfo, sessionCookie, expiresAfter),
                sessionCookie, 
                mail);
        }

        /// <summary> Object for queriying stations and bikes.</summary>
        public ICommand Command { get; private set; }

        /// <summary> Object for queriying stations and bikes.</summary>
        public IQuery Query { get; private set; }

        /// <summary> True if connector has access to copri server, false if cached values are used. </summary>
        public bool IsConnected => Command.IsConnected;

        /// <summary> Gets a command object to perform copri commands. </summary>
        public static ICommand GetCommand(ICopriServerBase copri, string sessioncookie, string mail) => string.IsNullOrEmpty(sessioncookie)
                            ? new Command(copri)
                            : new CommandLoggedIn(copri, sessioncookie, mail, () => DateTime.Now) as ICommand;

        /// <summary> Gets a command object to perform copri queries. </summary>
        private static IQuery GetQuery(ICachedCopriServer copri, string sessioncookie, string mail) => string.IsNullOrEmpty(sessioncookie)
                            ? new CachedQuery(copri) as IQuery
                            : new CachedQueryLoggedIn(copri, sessioncookie, mail, () => DateTime.Now);
    }
}