using System;
using System.Globalization;
using System.Net;
using TINK.Model.Repository.Exception;

namespace TINK.Model.Repository.Request
{
    /// <summary> Creates requests if a user is logged in.</summary>
    public class RequestBuilderLoggedIn : IRequestBuilder
    {
        /// <summary> Constructs a object for building requests. </summary>
        /// <param name="merchantId"></param>
        public RequestBuilderLoggedIn(
            string merchantId,
            string sessionCookie)
        {
            MerchantId = !string.IsNullOrEmpty(merchantId)
                ? merchantId
                : throw new ArgumentException("Merchant id must not be null.", nameof(merchantId));

            SessionCookie = !string.IsNullOrEmpty(sessionCookie)
                ? sessionCookie
                : throw new ArgumentException("Session cookie must not be null.", nameof(sessionCookie));
        }

        /// <summary> Holds the id denoting the merchant (TINK app). </summary>
        public string MerchantId { get; }

        /// <summary> Holds the session cookie if a user is logged in. </summary>
        public string SessionCookie { get; }

        /// <summary> Gets request to log user in. </summary>
        /// <param name="mailAddress">Mailaddress of user to log in.</param>
        /// <param name="password">Password to log in.</param>
        /// <param name="deviceId">Id specifying user and hardware.</param>
        /// <remarks>Response which holds auth cookie <see cref="ResponseBase.authcookie"/></remarks>
        public string DoAuthorization(
            string mailAddress,
            string password,
            string deviceId)
        {
            throw new CallNotRequiredException();
        }

        /// <summary> Logs user out. </summary>
        public string DoAuthout()
        {
            return $"request=authout&authcookie={SessionCookie}{MerchantId}";
        }

        /// <summary>Gets bikes available.</summary>
        /// <returns>Request to query list of bikes available.</returns>
        public string GetBikesAvailable()
        {
            return RequestBuilder.GetBikesAvailable(MerchantId, SessionCookie);
        }

        /// <summary> Gets a list of bikes reserved/ booked by acctive user from Copri.</summary>
        /// <returns>Request to query list of bikes occupied.</returns>
        public string GetBikesOccupied()
        {
            return !string.IsNullOrEmpty(SessionCookie)
                ? $"request=user_bikes_occupied&system=all&genkey=1&authcookie={SessionCookie}{MerchantId}"
                : "request=bikes_available";
        }

        /// <summary> Get list of stations from file. </summary>
        /// <returns>Request to query list of station.</returns>
        public string GetStations()
        {
            return $"request=stations_available&authcookie={SessionCookie ?? string.Empty}{MerchantId}";
        }

        /// <summary> Gets reservation request (synonym: reservation == request == reservieren). </summary>
        /// <remarks> Operator specific call.</remarks>
        /// <param name="bikeId">Id of the bike to reserve.</param>
        /// <returns>Requst to reserve bike.</returns>
        public string DoReserve(int bikeId) 
            => $"request=booking_request&bike={bikeId}&authcookie={SessionCookie}{MerchantId}";

        /// <summary> Gets request to cancel reservation. </summary>
        /// <remarks> Operator specific call.</remarks>
        /// <param name="bikeId">Id of the bike to cancel reservation for.</param>
        /// <returns>Requst on cancel booking request.</returns>
        public string DoCancelReservation(int p_iBikeId) 
            => $"request=booking_cancel&bike={p_iBikeId}&authcookie={SessionCookie}{MerchantId}";

        /// <summary> Request to get keys. </summary>
        /// <remarks> Operator specific call.</remarks>
        /// <param name="bikeId">Id of the bike to get keys for.</param>
        /// <returns>Request to get keys.</returns>
        public string CalculateAuthKeys(int bikeId) 
            => $"request=booking_update&bike={bikeId}&authcookie={SessionCookie}{MerchantId}&genkey=1";

        /// <summary> Gets the request for updating lock state for a booked bike. </summary>
        /// <remarks> Operator specific call.</remarks>
        /// <param name="bikeId">Id of the bike to update locking state for.</param>
        /// <param name="state">New locking state.</param>
        /// <returns>Request to update locking state.</returns>
        public string UpateLockingState(int bikeId, LocationDto geolocation, lock_state state, double batteryPercentage)
        {            
            return $"request=booking_update&bike={bikeId}{GetLocationKey(geolocation)}&lock_state={state}{GetBatteryPercentageKey(batteryPercentage)}&authcookie={SessionCookie}{MerchantId}";
        }

        /// <summary> Gets booking request request (synonym: booking == renting == mieten). </summary>
        /// <remarks> Operator specific call.</remarks>
        /// <param name="bikeId">Id of the bike to book.</param>
        /// <param name="guid">Used to publish GUID from app to copri. Used for initial setup of bike in copri.</param>
        /// <param name="batteryPercentage">Holds the filling level percentage of the battery.</param>
        /// <returns>Request to booking bike.</returns>
        public string DoBook(int bikeId, Guid guid, double batteryPercentage) 
            => $"request=booking_update&bike={bikeId}&authcookie={SessionCookie}{MerchantId}&Ilockit_GUID={guid}&state=occupied&lock_state=unlocked{GetBatteryPercentageKey(batteryPercentage)}";

        /// <summary> Gets request for returning the bike. </summary>
        /// <remarks> Operator specific call.</remarks>
        /// <param name="bikeId">Id of bike to return.</param>
        /// <param name="geolocation">Geolocation of lock when returning bike.</param>
        /// <returns>Requst on returning request.</returns>
        public string DoReturn(int bikeId, LocationDto geolocation)
        {          
            return $"request=booking_update&bike={bikeId}&authcookie={SessionCookie}{MerchantId}&state=available{GetLocationKey(geolocation)}&lock_state=locked";
        }

        /// <summary> Gets submit feedback request. </summary>
        /// <param name="message">General purpose message or error description.</param>
        /// <param name="isBikeBroken">True if bike is broken.</param>
        /// <returns>Submit feedback request.</returns>
        public string  DoSubmitFeedback(
            string message = null,            
            bool isBikeBroken = false) 
        {
            if (string.IsNullOrEmpty(message) && !isBikeBroken)
            {
                // User just acknoledged biked returned message.
                return "request=user_feedback";
            }

            if (isBikeBroken == false)
            {
                // Bike is ok and user entered a feedback message.
                return $"request=user_feedback&message={WebUtility.UrlEncode(message)}";
            }


            if (string.IsNullOrEmpty(message))
            {
                // User just marked bike as broken without comment.
                return $"request=user_feedback&bike_broken=1";
            }

            // Bike is marked as broken and user added a comment.
            return $"request=user_feedback&bike_broken=1&message={WebUtility.UrlEncode(message)}";
        }

        private string GetBatteryPercentageKey(double batteryPercentage) => !double.IsNaN(batteryPercentage) 
            ? $"&voltage={batteryPercentage.ToString(CultureInfo.InvariantCulture)}"
            : string.Empty;

        private string GetLocationKey(LocationDto geolocation)
        {
            if (geolocation == null) 
                return string.Empty;

            if (geolocation.Accuracy == null)
                return $"&gps={geolocation.Latitude.ToString(CultureInfo.InvariantCulture)},{ geolocation.Longitude.ToString(CultureInfo.InvariantCulture)}&gps_age={geolocation.Age.TotalSeconds}";

            return $"&gps={geolocation.Latitude.ToString(CultureInfo.InvariantCulture)},{geolocation.Longitude.ToString(CultureInfo.InvariantCulture)}&gps_accuracy={geolocation.Accuracy.Value.ToString(CultureInfo.InvariantCulture)}&gps_age={geolocation.Age.TotalSeconds}";
        }
    }
}