using System;
using Asp.Versioning;
using AutoMapper;
using gehGassi.Core.Interfaces;
using gehGassi.Web.Helper;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System.Threading.Tasks;
using gehGassi.Dto.Common;
using gehGassi.Dto;
using System.Collections.Generic;
using gehGassi.Domain.Common;
using gehGassi.Dto.Subscriptions;
using gehGassi.Web.Auth;

namespace gehGassi.Web.Controllers.Api
{
    /// <summary>
    /// Controller für die Verwaltung von Abonnements
    /// </summary>
    [Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)]
    [ApiController]
    [ApiVersion(1)]
    [Route("api/subscriptions")]
    [Route("api/v{v:apiVersion}/subscriptions")]
    public class ApiSubscriptionController : ApiBaseController
    {
        private readonly ILogger<ApiSubscriptionController> _logger;
        private readonly ISubscriptionService _subscriptionService;


        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="logger">Instanz eines ILogger</param>
        /// <param name="localizationOptions">Instanz von LocalizationOptions</param>
        /// <param name="appUserService">Instanz eines IAppUserService</param>
        /// <param name="subscriptionService">Instanz eines ISubscriptionService</param>
        public ApiSubscriptionController(IMapper mapper, ILogger<ApiSubscriptionController> logger, IOptions<LocalizationOptions> localizationOptions, 
            IAppUserService appUserService, ISubscriptionService subscriptionService) : base(mapper, localizationOptions, appUserService)
        {
            _logger = logger;
            _subscriptionService = subscriptionService;
        }

        /// <summary>
        /// Gibt alle Abonnements zurück für einen AppMode
        /// </summary>
        /// <param name="appMode">AppMode</param>
        /// <param name="language">Sprache</param>
        /// <returns>HTTP 200 OK wenn erfolgreich</returns>
        [HttpGet]
        [Route("GetAll")]
        public async Task<IActionResult> GetSubscriptions(AppModeDto appMode, string language)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                var subscriptions = await _subscriptionService.GetAllAsync((AppMode)appMode, language, LocalizationOptions.Value.DefaultCulture);
                var subscriptionsDto = Mapper.Map<List<SubscriptionDto>>(subscriptions);
                return Ok(subscriptionsDto);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Gibt alle Abonnement-Buchungen für einen AppUser zurück
        /// </summary>
        /// <param name="language">Sprache</param>
        /// <returns>HTTP 200 OK wenn erfolgreich</returns>
        [HttpGet]
        [Route("GetMy")]
        public async Task<IActionResult> GetMySubscriptions(string language)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                var appUserId = User.AppUserId();
                var subscriptions = await _subscriptionService.GetAllAppUserSubscriptionsAsync(appUserId, language, LocalizationOptions.Value.DefaultCulture);
                var subscriptionsDto = Mapper.Map<List<AppUserSubscriptionDto>>(subscriptions);
                return Ok(subscriptionsDto);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Gibt alle Abonnement-Buchungen für einen AppUser zurück
        /// </summary>
        /// <param name="language">Sprache</param>
        /// <returns>HTTP 200 OK wenn erfolgreich</returns>
        [HttpGet]
        [Route("GetMy/active")]
        public async Task<IActionResult> GetMyActiveSubscriptions(string language)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                var appUserId = User.AppUserId();
                var subscriptions = await _subscriptionService.GetAllAppUserSubscriptionsValidAsync(appUserId, language, LocalizationOptions.Value.DefaultCulture);
                var subscriptionsDto = Mapper.Map<List<AppUserSubscriptionDto>>(subscriptions);
                return Ok(subscriptionsDto);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Anlegen einer Abonnement-Buchung
        /// </summary>
        /// <param name="model">AppUserCreateSubscriptionDto</param>
        /// <returns>HTTP 200 OK, Felher sonst</returns>
        [HttpPost]
        [Route("Create")]
        public async Task<IActionResult> CreateSubscription(AppUserCreateSubscriptionDto model)
        {
            var clientOffset = GetClientDateOffset();

            var result = new CreateResponseDto<AppUserSubscriptionDto>
            {
                Status = CreateStatusDto.Error,
                Value = null
            };

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                if (ModelState.IsValid)
                {
                    var appUserId = User.AppUserId();
                    if (appUserId == model.AppUserId)
                    {
                        var subscription = await _subscriptionService.GetAsync(model.SubscriptionId);
                        if (subscription != null)
                        {
                            //Prüfen ob der Benutzer bereits ein Abonnement hat
                            var hasExistingBooking = await _subscriptionService.AppUserHasActiveBookingAsync(appUserId, subscription.AppMode);
                            if (!hasExistingBooking)
                            {
                                var appUserSubscription = _subscriptionService.CreateAppUserSubscription();
                                appUserSubscription.AppUserId = model.AppUserId;
                                appUserSubscription.SubscriptionId = model.SubscriptionId;
                                appUserSubscription.IsValid = true;
                                if (model.ExpirationDateToSet.HasValue)
                                {
                                    appUserSubscription.ExpirationDate = subscription.GetExpiration(model.ExpirationDateToSet.Value);
                                    appUserSubscription.ExpirationDateWithGrace = subscription.GetExpirationWithGrace(model.ExpirationDateToSet.Value);
                                }
                                else
                                {
                                    appUserSubscription.ExpirationDate = subscription.GetExpiration(DateTimeOffset.UtcNow);
                                    appUserSubscription.ExpirationDateWithGrace = subscription.GetExpirationWithGrace(DateTimeOffset.UtcNow);
                                }
                                appUserSubscription.Manual = false;
                                appUserSubscription.Platform = (Platform)model.Platform;
                                appUserSubscription.InAppBillingPurchaseJson = model.InAppBillingPurchaseJson;
                                appUserSubscription.CreatedBy = User.Identity.Name;
                                appUserSubscription.Created = DateTimeOffset.UtcNow;

                                _subscriptionService.AddAppUserSubscription(appUserSubscription);
                                await _subscriptionService.CommitAsync(User.Identity.Name);

                                var addedBooking = await _subscriptionService.GetAppUserSubscriptionAsync(appUserSubscription.Id, model.Language, LocalizationOptions.Value.DefaultCulture);
                                var addedBookingDto = Mapper.Map<AppUserSubscriptionDto>(addedBooking);
                                result.Status = CreateStatusDto.Success;
                                result.Value = addedBookingDto;
                            }
                            else
                            {
                                result.Status = CreateStatusDto.Exists;
                            }
                            return Ok(result);
                        }
                    }
                }
            }
            return BadRequest(CommunicationErrors.Common_Model_Invalid);
        }

        /// <summary>
        /// Wechseln eines Abonnements
        /// </summary>
        /// <param name="model">AppUserSwitchSubscriptionDto</param>
        /// <returns>HTTP 200 OK, Felher sonst</returns>
        [HttpPost]
        [Route("Switch")]
        public async Task<IActionResult> SwitchSubscription(AppUserSwitchSubscriptionDto model)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                if (ModelState.IsValid)
                {
                    var booking = await _subscriptionService.GetAppUserSubscriptionAsync(model.BookingId);
                    if (booking != null)
                    {
                        if (booking.IsValid)
                        {
                            var currentSubscription = await _subscriptionService.GetAsync(booking.SubscriptionId);
                            var subscription = await _subscriptionService.GetAsync(model.SubscriptionId);
                            if (subscription != null && currentSubscription != null)
                            {
                                if (subscription.Id != currentSubscription.Id)
                                {
                                    if (subscription.AppMode == currentSubscription.AppMode)
                                    {
                                        booking.SubscriptionId = model.SubscriptionId;
                                        booking.ExpirationDate = subscription.GetExpiration(DateTimeOffset.UtcNow);
                                        booking.LastRenewalDate = DateTimeOffset.UtcNow;
                                        booking.LastUpdate = DateTimeOffset.UtcNow;

                                        await _subscriptionService.CommitAsync(User.Identity.Name);

                                        var changedBooking = await _subscriptionService.GetAppUserSubscriptionAsync(booking.Id, model.Language, LocalizationOptions.Value.DefaultCulture);
                                        var changedBookingDto = Mapper.Map<AppUserSubscriptionDto>(changedBooking);

                                        return Ok(changedBookingDto);
                                    }
                                    return BadRequest(CommunicationErrors.Subscription_AppModeMismatch);
                                }
                                return BadRequest(CommunicationErrors.Subscription_NoChange);
                            }
                            return NotFound(CommunicationErrors.Subscription_NotFound);
                        }
                        return BadRequest(CommunicationErrors.Subscription_Invalid);
                    }
                    return NotFound(CommunicationErrors.Common_NotFound);
                }
                return BadRequest(CommunicationErrors.Common_Model_Invalid);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Stornieren eines Abonnements
        /// </summary>
        /// <param name="model">AppUserCancelSubscriptionDto</param>
        /// <returns>HTTP 200 OK, Felher sonst</returns>
        [HttpPost]
        [Route("Cancel")]
        public async Task<IActionResult> CancelSubscription(AppUserCancelSubscriptionDto model)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                if (ModelState.IsValid)
                {
                    var booking = await _subscriptionService.GetAppUserSubscriptionAsync(model.BookingId);
                    if (booking != null)
                    {
                        if (booking.IsValid && booking.Platform == (Platform)model.Platform)
                        {
                            booking.IsValid = false;
                            booking.LastUpdate = DateTimeOffset.UtcNow;
                            booking.ExpirationDate = DateTimeOffset.UtcNow;
                            booking.ExpirationDateWithGrace = DateTimeOffset.UtcNow;

                            await _subscriptionService.CommitAsync(User.Identity.Name);

                            var changedBooking = await _subscriptionService.GetAppUserSubscriptionAsync(booking.Id, model.Language, LocalizationOptions.Value.DefaultCulture);
                            var changedBookingDto = Mapper.Map<AppUserSubscriptionDto>(changedBooking);

                            return Ok(changedBookingDto);
                        }
                        return BadRequest(CommunicationErrors.Subscription_Invalid);
                    }
                    return NotFound(CommunicationErrors.Common_NotFound);
                }
                return BadRequest(CommunicationErrors.Common_Model_Invalid);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Verlängern eines Abonnements
        /// </summary>
        /// <param name="model">AppUserRenewSubscriptionDto</param>
        /// <returns>HTTP 200 OK, Felher sonst</returns>
        [HttpPost]
        [Route("Renew")]
        public async Task<IActionResult> RenewSubscription(AppUserRenewSubscriptionDto model)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {
                if (ModelState.IsValid)
                {
                    var booking = await _subscriptionService.GetAppUserSubscriptionAsync(model.BookingId);
                    if (booking != null)
                    {
                        if (booking.IsValid && booking.Platform == (Platform)model.Platform)
                        {
                            var subscription = await _subscriptionService.GetAsync(booking.SubscriptionId);
                            if (subscription != null)
                            {
                                booking.LastUpdate = DateTimeOffset.UtcNow;
                                booking.LastRenewalDate = DateTimeOffset.UtcNow;
                                booking.ExpirationDate = subscription.GetExpiration(DateTimeOffset.UtcNow);

                                await _subscriptionService.CommitAsync(User.Identity.Name);

                                var changedBooking = await _subscriptionService.GetAppUserSubscriptionAsync(booking.Id, model.Language, LocalizationOptions.Value.DefaultCulture);
                                var changedBookingDto = Mapper.Map<AppUserSubscriptionDto>(changedBooking);

                                return Ok(changedBookingDto);
                            }
                            return BadRequest(CommunicationErrors.Subscription_NotFound);
                        }
                        return BadRequest(CommunicationErrors.Subscription_Invalid);
                    }
                    return NotFound(CommunicationErrors.Common_NotFound);
                }
                return BadRequest(CommunicationErrors.Common_Model_Invalid);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }
    }
}