using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using gehGassi.Dto;
using gehGassi.Dto.Banners;
using gehGassi.Dto.Common;
using gehGassi.Dto.News;
using gehGassiApp.Core.Interfaces;
using gehGassiApp.Core.Resources;
using gehGassiApp.Domain.Banners;
using gehGassiApp.Domain.Common;
using Microsoft.Maui.Devices.Sensors;

namespace gehGassiApp.Core.Services
{
    /// <summary>
    /// Service der alle Funktionen für Banner zur Verfügung stellt
    /// </summary>
    public class BannerService : IBannerService
    {
        private readonly ICommunicationService _communicationService;
        private readonly ILocationService _locationService;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="communicationService">Instanz eines ICommunicationService</param>
        /// <param name="locationService">Instanz eines ILocationService</param>
        public BannerService(ICommunicationService communicationService, ILocationService locationService)
        {
            _communicationService = communicationService;
            _locationService = locationService;
        }

        /// <summary>
        /// Gibt einen zufälligen Banner für eine Platzierung zurück
        /// </summary>
        /// <param name="location">Bannerplatzierung</param>
        /// <param name="currentBannerId">Optional: Id des Banners der gerade angezeigt wird</param>
        /// <param name="currentLocation">Aktuelle Position</param>
        /// <param name="accessToken">Aktuelles Accesstoken</param>
        /// <param name="appMode">Akteuller Modus der App</param>
        /// <param name="language">Gewünschte Sprache</param>
        /// <param name="token">CancellationToken</param>
        /// <returns>ListCommunicationResult</returns>
        public async Task<CommunicationResult<Banner>> GetForLocationAsync(BannerLocation location, string currentBannerId, LocationDto currentLocation, string accessToken, AppMode appMode, string language, CancellationToken token)
        {
            var result = new CommunicationResult<Banner>() { Value = null };

            var query = new BannerQueryDto
            {
                AppMode = (AppModeDto)appMode,
                Location = currentLocation,
                BannerLocation = (BannerLocationDto)location,
                CurrentBannerId = currentBannerId,
                Language = language,
                Take = 1,
                Skip = 0
            };

            var isConnected = await _communicationService.IsConnected();
            if (isConnected)
            {
                var bannerResult = await _communicationService.GetBannerForLocationAsync(query, accessToken, token);
                if (bannerResult.Success)
                {
                    bannerResult.Value.Image += $"?t={DateTime.UtcNow.Ticks}"; //Um zu verhindern, dass ein Android-Image Error passiert...
                    return bannerResult;
                }
            }
            else
            {
                result.Success = false;
                result.ErrorCode = CommunicationErrors.ServerNoConnection;
                result.ErrorMessage = Errors.Server_NoConnection;
            }

            return result;
        }

        /// <summary>
        /// Hinzufügen von Clicks zu einem Banner
        /// </summary>
        /// <param name="bannerId">Id des Banners</param>
        /// <param name="clicks">Anzahl der Klicks</param>
        /// <param name="appMode">Akteuller Modus der App</param>
        /// <param name="location">Aktuelle Position</param>
        /// <param name="language">Gewünschte Sprache</param>
        /// <param name="accessToken">Aktuelles Accesstoken</param>
        /// <param name="token">CancellationToken</param>
        /// <returns>CommunicationResult - true wenn noch gültig, false wenn der Banner nicht mehr gültig ist</returns>
        public async Task<CommunicationResult<bool>> AddClicksAsync(string bannerId, int clicks, AppMode appMode, LocationDto location, string language, string accessToken, CancellationToken token)
        {
            var result = new CommunicationResult<bool>() { Value = false };

            var isConnected = await _communicationService.IsConnected();
            if (isConnected)
            {
                var dtoModel = new BannerClickDto()
                {
                    AppMode = (AppModeDto)appMode,
                    ClickCount = clicks, 
                    Id = bannerId, 
                    Language = language, 
                    Location = location
                };

                var bannerResult = await _communicationService.AddClicksAsync(dtoModel, accessToken, token);
                if (bannerResult.Success)
                    return bannerResult;
            }
            else
            {
                result.Success = false;
                result.ErrorCode = CommunicationErrors.ServerNoConnection;
                result.ErrorMessage = Errors.Server_NoConnection;
            }

            return result;
        }

        /// <summary>
        /// Hinzufügen von views zu einem Banner
        /// </summary>
        /// <param name="bannerId">Id des Banners</param>
        /// <param name="views">Anzahl der Views</param>
        /// <param name="appMode">Akteuller Modus der App</param>
        /// <param name="location">Aktuelle Position</param>
        /// <param name="language">Gewünschte Sprache</param>
        /// <param name="accessToken">Aktuelles Accesstoken</param>
        /// <param name="token">CancellationToken</param>
        /// <returns>CommunicationResult - true wenn noch gültig, false wenn der Banner nicht mehr gültig ist</returns>
        public async Task<CommunicationResult<bool>> AddViewsAsync(string bannerId, int views, AppMode appMode, LocationDto location, string language, string accessToken, CancellationToken token)
        {
            var result = new CommunicationResult<bool>() { Value = false };

            var isConnected = await _communicationService.IsConnected();
            if (isConnected)
            {
                var dtoModel = new BannerViewDto()
                {
                    AppMode = (AppModeDto)appMode,
                    ViewCount = views,
                    Id = bannerId,
                    Language = language,
                    Location = location
                };

                var bannerResult = await _communicationService.AddViewsAsync(dtoModel, accessToken, token);
                if (bannerResult.Success)
                    return bannerResult;
            }
            else
            {
                result.Success = false;
                result.ErrorCode = CommunicationErrors.ServerNoConnection;
                result.ErrorMessage = Errors.Server_NoConnection;
            }

            return result;
        }
    }
}