using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using Manager.DTOs;
using Manager.Helpers;
using Manager.Interfaces.Models;
using Manager.Services;
using ManagerService.Data;
using ManagerService.Data.SubSection;
using ManagerService.DTOs;
using ManagerService.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Mqtt.Client.AspNetCore.Services;
using Newtonsoft.Json;
using NSwag.Annotations;

namespace ManagerService.Controllers
{
    [Authorize(Policy = ManagerService.Service.Security.Policies.ContentEditor)]
    [ApiController, Route("api/[controller]")]
    [OpenApiTag("Configuration", Description = "Configuration management")]
    public class ConfigurationController : ControllerBase
    {
        private readonly MyInfoMateDbContext _myInfoMateDbContext;

        /*private ConfigurationDatabaseService _configurationService;
        private InstanceDatabaseService _instanceService;
        private SectionDatabaseService _sectionService;
        private ResourceDatabaseService _resourceService;
        private DeviceDatabaseService _deviceService;*/
        private readonly ILogger<ConfigurationController> _logger;
        private readonly IConfiguration _configuration;
        IHexIdGeneratorService idService = new HexIdGeneratorService();

        public ConfigurationController(IConfiguration configuration, ILogger<ConfigurationController> logger, MyInfoMateDbContext myInfoMateDbContext)
        {
            _logger = logger;
            _configuration = configuration;
            _myInfoMateDbContext = myInfoMateDbContext;
        }

        /// <summary>
        /// Get a list of all configuration (summary)
        /// </summary>
        /// <param name="id">id instance</param>
        [AllowAnonymous]
        [ProducesResponseType(typeof(List<ConfigurationDTO>), 200)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet]
        public ObjectResult Get([FromQuery] string instanceId)
        {
            try
            {
                List<Configuration> configurations = _myInfoMateDbContext.Configurations.Where(c => c.InstanceId == instanceId).ToList();

                List<ConfigurationDTO> configurationDTOs = new List<ConfigurationDTO>();

                foreach(var configuration in configurations)
                {
                    List<string> sectionIds = _myInfoMateDbContext.Sections.Where(s => s.ConfigurationId == configuration.Id && !s.IsSubSection).Select(s => s.Id).ToList();
                    ConfigurationDTO configurationDTO = configuration.ToDTO(sectionIds);
                    configurationDTOs.Add(configurationDTO);
                }   

                return new OkObjectResult(configurationDTOs.OrderBy(c => c.dateCreation));
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Get Confuguration list by instanceId' pincode
        /// </summary>
        /// <param name="pinCode">Code pin</param>  
        [Authorize(Policy = ManagerService.Service.Security.Policies.AppReadAccess)]
        [ProducesResponseType(typeof(List<ConfigurationDTO>), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("byPin")]
        public ObjectResult GetConfigurationsByPinCode([FromQuery] string pinCode)
        {
            try
            {
                Instance instance = _myInfoMateDbContext.Instances.FirstOrDefault(i => i.PinCode == pinCode);

                if (instance == null)
                    throw new KeyNotFoundException("None instance is linked to this pin code");

                List<Configuration> configurations = _myInfoMateDbContext.Configurations.Where(c => c.InstanceId == instance.Id).ToList();
                List<ConfigurationDTO> configurationDTOs = new List<ConfigurationDTO>();
                foreach (var configuration in configurations)
                {
                    List<string> sectionIds = _myInfoMateDbContext.Sections.Where(s => s.ConfigurationId == configuration.Id && !s.IsSubSection).Select(s => s.Id).ToList();
                    configurationDTOs.Add(configuration.ToDTO(sectionIds));
                }

                return new OkObjectResult(configurationDTOs);
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Get a specific display configuration 
        /// </summary>
        /// <param name="id">id configuration</param>
        [AllowAnonymous]
        [ProducesResponseType(typeof(ConfigurationDTO), 200)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{id}")]
        public async Task<ObjectResult> GetDetailAsync(string id)
        {
            try
            {
                Configuration configuration = _myInfoMateDbContext.Configurations.FirstOrDefault(c => c.Id == id);

                if (configuration == null)
                    throw new KeyNotFoundException("This configuration was not found");

                List<string> sectionIds = _myInfoMateDbContext.Sections.Where(s => s.ConfigurationId == id && !s.IsSubSection).Select(s => s.Id).ToList();

                try 
                {
                    var weatherSections = _myInfoMateDbContext.Sections.OfType<SectionWeather>()
                    .Where(s => s.ConfigurationId == id && !s.IsSubSection)
                    .ToList();

                    foreach (var weatherSection in weatherSections)
                    {
                        if (weatherSection.WeatherCity != null && weatherSection.WeatherCity.Length >= 2 &&
                        (weatherSection.WeatherUpdatedDate == null || weatherSection.WeatherUpdatedDate.Value.AddHours(3) < DateTimeOffset.Now)) // Update all 4 hours
                        {
                            // Call Openweather api with token from appSettings and update result with json
                            var apiKey = _configuration.GetSection("OpenWeatherApiKey").Get<string>();

                            if (apiKey != null && apiKey.Length > 0)
                            {
                                string url = $"http://api.openweathermap.org/geo/1.0/direct?q={weatherSection.WeatherCity}&limit=1&appid={apiKey}";

                                using (HttpClient client = new HttpClient())
                                {
                                    try
                                    {
                                        HttpResponseMessage response = await client.GetAsync(url);
                                        response.EnsureSuccessStatusCode();
                                        string responseBody = await response.Content.ReadAsStringAsync();

                                        List<CityData> cities = JsonConvert.DeserializeObject<List<CityData>>(responseBody);

                                        if (cities.Count > 0)
                                        {
                                            double lat = cities[0].Lat;
                                            double lon = cities[0].Lon;

                                            //string onecallUrl = $"https://api.openweathermap.org/data/3.0/onecall?lat={lat}&lon={lon}&appid={apiKey}";
                                            string callUrl = $"https://api.openweathermap.org/data/2.5/forecast?lat={lat}&lon={lon}&units=metric&appid={apiKey}";

                                            HttpResponseMessage callResponse = await client.GetAsync(callUrl);
                                            callResponse.EnsureSuccessStatusCode();
                                            string callResponseBody = await callResponse.Content.ReadAsStringAsync();

 
                                            weatherSection.WeatherUpdatedDate = DateTimeOffset.Now.ToUniversalTime(); ;
                                            weatherSection.WeatherResult = callResponseBody;
                                            _myInfoMateDbContext.SaveChanges();
                                        }
                                        else
                                        {
                                            Console.WriteLine("Aucune ville trouv�e.");
                                        }
                                    }
                                    catch (HttpRequestException e)
                                    {
                                        Console.WriteLine($"Une erreur s'est produite lors de la requ�te HTTP : {e.Message}");
                                    }
                                }
                            }
                        }

                    }
                } catch (Exception e)
                {
                    Console.WriteLine($"Une erreur s'est produite lors de la mise � jour des sections de type m�t�o : {e.Message}");
                }
                
                return new OkObjectResult(configuration.ToDTO(sectionIds));
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) {};
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Create a new configuration
        /// </summary>
        /// <param name="newConfiguration">New configuration info</param>  
        [ProducesResponseType(typeof(ConfigurationDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost]
        public ObjectResult Create([FromBody] ConfigurationDTO newConfiguration)
        {
            try
            {
                if (newConfiguration == null)
                    throw new ArgumentNullException("Configuration param is null");

                // Todo add some verification ? 
                Configuration configuration = new Configuration();
                configuration.InstanceId = newConfiguration.instanceId;
                configuration.Label = newConfiguration.label;
                configuration.Title = new List<TranslationDTO>();
                configuration.ImageId = newConfiguration.imageId;
                configuration.ImageSource = newConfiguration.imageSource;
                configuration.PrimaryColor = newConfiguration.primaryColor;
                configuration.SecondaryColor = newConfiguration.secondaryColor;
                configuration.LoaderImageId = newConfiguration.loaderImageId;
                configuration.LoaderImageUrl = newConfiguration.loaderImageUrl;
                configuration.Languages = newConfiguration.languages;
                configuration.Title = LanguageInit.Init("Title", configuration.Languages);
                configuration.DateCreation = DateTime.Now.ToUniversalTime();
                configuration.IsOffline = newConfiguration.isOffline;

                configuration.Id = idService.GenerateHexId();

                _myInfoMateDbContext.Configurations.Add(configuration);
                //Configuration configurationCreated = _configurationService.Create(configuration);

                _myInfoMateDbContext.SaveChanges();

                return new OkObjectResult(configuration.ToDTO(new List<string>())); // Empty list
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) {};
            }
            catch (InvalidOperationException ex)
            {
                return new ConflictObjectResult(ex.Message) {};
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }


        /// <summary>
        /// Update a configuration
        /// </summary>
        /// <param name="updatedConfiguration">Configuration to update</param>  
        [ProducesResponseType(typeof(ConfigurationDTO), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPut]
        public ObjectResult Update([FromBody] ConfigurationDTO updatedConfiguration)
        {
            try
            {
                if (updatedConfiguration == null)
                    throw new ArgumentNullException("configuration param is null");

                Configuration configuration = _myInfoMateDbContext.Configurations.FirstOrDefault(c => c.Id == updatedConfiguration.id);

                if (configuration == null)
                    throw new KeyNotFoundException("Configuration does not exist");

                // Todo add some verification ? 
                configuration.InstanceId = updatedConfiguration.instanceId;
                configuration.Label = updatedConfiguration.label;
                configuration.Title = updatedConfiguration.title;
                configuration.ImageId = updatedConfiguration.imageId;
                configuration.ImageSource = updatedConfiguration.imageSource;
                configuration.PrimaryColor = updatedConfiguration.primaryColor;
                configuration.SecondaryColor = updatedConfiguration.secondaryColor;
                configuration.Languages = updatedConfiguration.languages;
                configuration.IsOffline = updatedConfiguration.isOffline;
                configuration.LoaderImageId = updatedConfiguration.loaderImageId;
                configuration.LoaderImageUrl = updatedConfiguration.loaderImageUrl;

                //Configuration configurationModified = _configurationService.Update(updatedConfiguration.id, configuration);
                _myInfoMateDbContext.SaveChanges();

                MqttClientService.PublishMessage($"config/{configuration.Id}", JsonConvert.SerializeObject(new PlayerMessageDTO() { configChanged = true }));

                List<string> sectionIds = _myInfoMateDbContext.Sections.Where(s => s.ConfigurationId == configuration.Id && !s.IsSubSection).Select(s => s.Id).ToList(); // _sectionService.GetAllIdsFromConfiguration(configuration.Id);

                return new OkObjectResult(configuration.ToDTO(sectionIds));
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) {};
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) {};
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }


        /// <summary>
        /// Delete a configuration
        /// </summary>
        /// <param name="id">Id of configuration to delete</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpDelete("{id}")]
        public ObjectResult Delete(string id)
        {
            try
            {
                if (id == null)
                    throw new ArgumentNullException("Configuration param is null");

                var configuration = _myInfoMateDbContext.Configurations.FirstOrDefault(c => c.Id == id);

                if (configuration == null)
                    throw new KeyNotFoundException("Configuration does not exist");

                _myInfoMateDbContext.Remove(configuration);
                _myInfoMateDbContext.SaveChanges();

                // Delete config for all devices
                List<Device> devices = _myInfoMateDbContext.Devices.Where(d => d.ConfigurationId == id).ToList();

                foreach (var device in devices)
                {
                    device.Configuration = null;
                    device.ConfigurationId = null;
                    _myInfoMateDbContext.SaveChanges();
                    //_deviceService.Update(device.Id, device);
                }

                MqttClientService.PublishMessage($"config/{id}", JsonConvert.SerializeObject(new PlayerMessageDTO() { configChanged = true, isDeleted = true }));

                return new ObjectResult("The configuration has been deleted") { StatusCode = 202 };

            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }


        /// <summary>
        /// Export a configuration
        /// </summary>
        /// <param name="id">Id of configuration to export</param>  
        /// <param name="language">Language to export</param>  
        [Authorize(Policy = ManagerService.Service.Security.Policies.AppReadAccess)]
        [ProducesResponseType(typeof(FileContentResult), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpGet("{id}/export")]
        public FileContentResult Export(string id, [FromQuery] string language)
        {
            try
            {
                if (id == null)
                    throw new ArgumentNullException("Configuration param is null");

                Configuration configuration = _myInfoMateDbContext.Configurations.FirstOrDefault(c => c.Id == id);

                if (configuration == null)
                    throw new KeyNotFoundException("Configuration does not exist");

                // Les entités, pas seulement leurs DTO : la collecte des ressources passe
                // par GetReferencedResourceIds, qui vit sur le sous-type.
                List<Section> sections = _myInfoMateDbContext.Sections.Where(s => s.ConfigurationId == configuration.Id).ToList();
                List<SectionDTO> sectionDTOs = sections.Select(s => s.ToDTO()).ToList();
                List<ResourceDTO> resourceDTOs = new List<ResourceDTO>();

                if (configuration.ImageId != null)
                {
                    addResourceToList(resourceDTOs, configuration.ImageId);
                }

                if (configuration.LoaderImageId != null)
                {
                    addResourceToList(resourceDTOs, configuration.LoaderImageId);
                }

                foreach (var section in sections)
                {
                    // Remplace 157 lignes de `switch` commenté qui n'ont jamais tourné :
                    // une visite téléchargée n'embarquait que l'image de la configuration,
                    // celle du loader et l'image de chaque section — ni contenus d'articles,
                    // ni audios, ni icônes de carte, ni images de quiz.
                    // `GetReferencedResourceIds` est déjà implémentée sur les 13 sous-types
                    // et connaît chacun ses propres médias ; c'est aussi elle qui garantit
                    // qu'un nouveau type de section n'ouvre pas un trou silencieux ici.
                    foreach (var resourceId in section.GetReferencedResourceIds(language))
                        addResourceToList(resourceDTOs, resourceId);
                }
                ExportConfigurationDTO toDownload = configuration.ToExportDTO(sectionDTOs, resourceDTOs);
                string jsonString = JsonConvert.SerializeObject(toDownload);
                var fileName = $"{configuration.Label}.json";
                var mimeType = "application/json";
                var fileBytes = Encoding.UTF8.GetBytes(jsonString);
                return new FileContentResult(fileBytes, mimeType)
                {
                    FileDownloadName = fileName
                };
            }
            catch (ArgumentNullException ex)
            {
                return null;
                //return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return null;
                //return new NotFoundObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return null;
                //return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        /// <summary>
        /// Import a configuration
        /// </summary>
        /// <param name="exportConfiguration">Configuration to import</param>  
        [ProducesResponseType(typeof(string), 202)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 404)]
        [ProducesResponseType(typeof(string), 409)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost("import")]
        public ObjectResult Import([FromBody] ExportConfigurationDTO exportConfiguration)
        {
            try
            {
                if (exportConfiguration == null)
                    throw new ArgumentNullException("File to import is null");

                Configuration configuration = _myInfoMateDbContext.Configurations.FirstOrDefault(c => c.Id == exportConfiguration.id);
                if (configuration != null)
                    throw new InvalidOperationException("Configuration already exist in the system");

                configuration = new Configuration();
                configuration.Id = exportConfiguration.id;
                configuration.InstanceId = exportConfiguration.instanceId;
                configuration.Label = exportConfiguration.label;
                configuration.Title = exportConfiguration.title;
                configuration.ImageId = exportConfiguration.imageId;
                configuration.ImageSource = exportConfiguration.imageSource;

                if (configuration.ImageId != null)
                {
                    createResource(exportConfiguration.resources.Where(r => r.id == configuration.ImageId).FirstOrDefault());
                }

                configuration.DateCreation = exportConfiguration.dateCreation;
                configuration.PrimaryColor = exportConfiguration.primaryColor;
                configuration.SecondaryColor = exportConfiguration.secondaryColor;
                configuration.Languages = exportConfiguration.languages;
                configuration.IsOffline = exportConfiguration.isOffline;
                configuration.LoaderImageId = exportConfiguration.loaderImageId;
                configuration.LoaderImageUrl = exportConfiguration.loaderImageUrl;

                if (configuration.LoaderImageId != null)
                {
                    createResource(exportConfiguration.resources.Where(r => r.id == configuration.LoaderImageId).FirstOrDefault());
                }

                _myInfoMateDbContext.Configurations.Add(configuration);
                //_configurationService.Create(configuration);

                var sectionsAlreadyInDB = _myInfoMateDbContext.Sections.Where(s => !exportConfiguration.sections.Select(s => s.id).Contains(s.Id)).Select(s => s.Id).ToList();

                // Toutes les ressources de la charge, en une passe. `createResource` est
                // idempotente, donc les quelques appels ciblés qui subsistent plus haut sont
                // sans effet — et un nouveau type de section ne peut plus ouvrir de trou ici.
                foreach (var resourceExport in exportConfiguration.resources ?? new List<ResourceDTO>())
                    createResource(resourceExport);

                foreach (var section in exportConfiguration.sections.Where(s => !sectionsAlreadyInDB.Contains(s.id)))
                {
                    Section newSection = SectionFactory.CreateEmpty(section.type);
                    newSection.Id = section.id;
                    newSection.InstanceId = section.instanceId;
                    newSection.Label = section.label;
                    newSection.Title = section.title; 
                    newSection.Description = section.description; 
                    newSection.Order = section.order.GetValueOrDefault(); // if one day we can use same section in multiple configuration, need to change that
                    newSection.Type = section.type;
                    newSection.ImageId = section.imageId;
                    newSection.ImageSource = section.imageSource;
                    newSection.ConfigurationId = section.configurationId;
                    newSection.IsSubSection = section.isSubSection;
                    newSection.ParentId = section.parentId;
                    //newSection.Data = section.data;
                    newSection.DateCreation = section.dateCreation.Value;
                    newSection.IsBeacon = section.isBeacon;
                    newSection.BeaconId = section.beaconId;
                    newSection.Latitude = section.latitude;
                    newSection.Longitude = section.longitude;
                    newSection.MeterZoneGPS = section.meterZoneGPS;

                    if (newSection.ImageId != null)
                    {
                        createResource(exportConfiguration.resources.Where(r => r.id == newSection.ImageId).FirstOrDefault());
                    }

                    _myInfoMateDbContext.Sections.Add(newSection);
                    //_sectionService.Create(newSection);

                    // Le `switch` de 126 lignes qui vivait ici cherchait, section par
                    // section, quelles ressources de la charge créer — et il était commenté,
                    // donc seule l'image de la section arrivait. Remplacé par la boucle
                    // unique plus haut : l'export embarque désormais toutes les ressources
                    // référencées, l'import n'a plus à les redécouvrir.
                }

                return new ObjectResult("The configuration has been successfully imported") { StatusCode = 202 };

            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) { };
            }
            catch (KeyNotFoundException ex)
            {
                return new NotFoundObjectResult(ex.Message) { };
            }
            catch (InvalidOperationException ex)
            {
                return new ConflictObjectResult(ex.Message) { };
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }

        private void createResource(ResourceDTO resourceExport)
        {
            if (resourceExport != null)
            {
                Resource resource = new Resource();
                resource.Id = resourceExport.id;
                resource.InstanceId = resourceExport.instanceId;
                resource.Type = resourceExport.type;
                resource.Label = resourceExport.label;
                resource.DateCreation = resourceExport.dateCreation;
                //resource.Data = resourceExport.data;

                var resourceInDb = _myInfoMateDbContext.Resources.FirstOrDefault(r => r.Id == resourceExport.id);

                if (resourceInDb == null)
                    _myInfoMateDbContext.Resources.Add(resource);
                    //_resourceService.Create(resource);
            }
        }

        private List<ResourceDTO> addResourceToList(List<ResourceDTO> resourceDTOs, string resourceId) {
            if (!resourceDTOs.Select(r => r.id).Contains(resourceId)) {
                Resource resource = _myInfoMateDbContext.Resources.FirstOrDefault(r => r.Id == resourceId);

                if (resource != null && !resourceDTOs.Any(r => r.id == resource.Id)) {
                    resourceDTOs.Add(resource.ToDTO());
                }
            }
            return resourceDTOs;
        }
    }
}