using AutoMapper;
using FluentValidation;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using PARR.API.Contracts.V1;
using PARR.API.Contracts.V1.Requests;
using PARR.API.Contracts.V1.Requests.Queries;
using PARR.API.Contracts.V1.Responses;
using PARR.API.Contracts.V1.Responses.Base;
using PARR.API.Controllers.V1.Base;
using PARR.API.Extensions;
using PARR.API.Services.Interfaces;
using PARR.API.Settings;
using PARR.BLL.Domain.Mq;
using PARR.BLL.Services.Interfaces;
using PARR.Constants;
using PARR.DAL.Contracts;
using PARR.DAL.DomainModels;
using PARR.DAL.Models;
using PARR.DAL.Services.Interfaces;
using System.Text.Json;
using static PARR.API.Contracts.V1.ApiRoutes;

namespace PARR.API.Controllers.V1
{
    [Authorize(Roles = ParrRoles.Administrator.Role)]
    public class ApplicationInWorkController : BaseApiController
    {
        private readonly ILogger<ApplicationInWorkController> logger;
        private readonly IMapper mapper;
        private readonly IApplicationsInWorkService applicationsInWorkService;
        private readonly IValidator<ApplicationInWorkRequest> validator;
        private readonly IUriService uriService;
        private readonly ITemplateService templateService;
        private readonly IMqService mqService;
        private readonly MqSettings mqSettings;

        public ApplicationInWorkController(
            ILogger<ApplicationInWorkController> logger,
            IMapper mapper,
            IApplicationsInWorkService applicationsInWorkService,
            IValidator<ApplicationInWorkRequest> validator,
            IUriService uriService,
            ITemplateService templateService,
            IMqService mqService,
            MqSettings mqSettings
            )
        {
            this.logger = logger;
            this.mapper = mapper;
            this.applicationsInWorkService = applicationsInWorkService;
            this.validator = validator;
            this.uriService = uriService;
            this.templateService = templateService;
            this.mqService = mqService;
            this.mqSettings = mqSettings;
        }


        /// <summary>
        /// Получить список заданий на выполнение работ(ApplicationInWork) постранично
        /// </summary>
        /// <returns></returns>
        [HttpGet(ApiRoutes.Job.GetAll)]
        public async Task<IActionResult> GetAll([FromQuery] PaginationQuery paginationQuery, [FromQuery] ApplicationInWorkQuery filter)
        {
            var paginationFilter = mapper.Map<PaginationFilter>(paginationQuery);

            IQueryable<ApplicationsInWork> query = applicationsInWorkService.Get().Include(t => t.Application).ThenInclude(t => t!.ApplicationType);

            if (filter.IsLight != true)
            {
                query = query
                .Include(t => t.Work)
                //.Include(t => t.Templates) - большой запрос, делаем его отдельно
                .Include(t => t.WorkGroups).ThenInclude(t => t.WorkGroup);
            }

            query = query.OrderBy(t => t.ShortDescription).ThenBy(t => t.Application!.Name);

            if (!string.IsNullOrEmpty(filter.ShortDescription))
                query = query.Where(t => t.ShortDescription.ToLower().Contains(filter.ShortDescription.ToLower()));

            if (filter.WorkId.HasValue)
                query = query.Where(t => t.WorkId == filter.WorkId.Value);

            var appInWorks = await applicationsInWorkService.GetPage(query, paginationFilter).ToListAsync();

            if (!appInWorks.Any())
                return NoContent();

            var response = mapper.Map<List<ApplicationInWorkResponse>>(appInWorks);

            if (filter.IsLight != true)
            {
                //Если запрос не легкий, загружаем кол-во шаблонов отдельно, это значительно ускоряет запрос
                foreach (var item in response)
                {
                    item.TemplatesCount = await templateService.Get().CountAsync(t => t.ApplicationInWorkId == item.Id);

                    var statistics = await GetStatisticsAsync(item.Id);
                    BindStatistics(item, statistics);
                }
            }

            var paginationResponse = new PagedResponse<ApplicationInWorkResponse>(response, true).GetPaginatedProps(paginationFilter, query);

            return Ok(paginationResponse);
        }


        /// <summary>
        /// Получить задание на выполнение работ по id
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpGet(ApiRoutes.Job.Get)]
        public async Task<IActionResult> GetById([FromRoute] Guid id)
        {
            var applicationInWork = await applicationsInWorkService.Get()
                    .Include(t => t.Application).ThenInclude(t => t!.ApplicationType)
                    .Include(t => t.Work)
                    //.Include(t => t.Templates)
                    .Include(t => t.WorkGroups).ThenInclude(t => t.WorkGroup)
                    .FirstOrDefaultAsync(t => t.Id == id);

            if (applicationInWork == null)
                return NotFound();

            var response = mapper.Map<ApplicationInWorkResponse>(applicationInWork);
            response.TemplatesCount = await templateService.Get().CountAsync(t => t.ApplicationInWorkId == id);

            var statistics = await GetStatisticsAsync(response.Id);
            BindStatistics(response, statistics);

            return Ok(new Response<ApplicationInWorkResponse>(response, true));
        }


        /// <summary>
        /// Создать задание на выполнение работ (ApplicationInWork)
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        [HttpPost(ApiRoutes.Job.Create)]
        public async Task<IActionResult> Create([FromBody] ApplicationInWorkRequest request)
        {
            var resultValidate = await validator.ValidateAsync(request);

            if (!resultValidate.IsValid)
                return BadRequest(new Response(resultValidate.Errors));

            //уникальная запись по полям ApplicationId, WorkId
            var existSameAiW = await applicationsInWorkService.GetAsync(request.ApplicationId, request.WorkId);
            if (existSameAiW != null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = "Задание на выполнение работ с такими ПО и работой уже существует" } }));

            var applicationInWork = new ApplicationsInWork
            {
                Id = Guid.NewGuid(),
                WorkId = request.WorkId,
                ApplicationId = request.ApplicationId,
                TemplateDuration = request.TemplateDuration,
                ShortDescription = request.ShortDescription.Trim(),
                FullDescription = request.FullDescription.Trim(),
                Solution = request.Solution.Trim(),
                //NextRun = request.NextRun,
                IsAutoDistributionEnabled = request.IsAutoDistributionEnabled,
                ReferenceDate = request.ReferenceDate,
                IsAgent = request.IsAgent,
                AgentName = request.AgentName?.Trim(),
                AgentTimeOutSec = request.AgentTimeOutSec,
                AgentScript = request.AgentScript?.Trim()
            };

            //Добавляем настройки планировщика
            request.Schedule.ForEach(item =>
            {
                applicationInWork.EsppSchValues.Add(new EsppSchValue
                {
                    ApplicationsInWorkId = applicationInWork.Id,
                    TypeConfigId = item.TypeConfigId,
                    TypeValueId = item.TypeValueId
                });
            });

            //Добавляем рабочие группы
            request.WorkGroups.ForEach(workGroupId =>
            {
                applicationInWork.WorkGroups.Add(new AppInWorkInWorkGroup
                {
                    ApplicationsInWorkId = applicationInWork.Id,
                    WorkGroupId = workGroupId
                });
            });

            if (!await applicationsInWorkService.CreateAsync(applicationInWork) || !await applicationsInWorkService.CommitAsync())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = "Ошибка при созании задания на выполнение работ" } }));

            logger.LogInformation($"Пользователь {User.Identity?.Name} добавил задание на выполнение работ: {applicationInWork.Id}, {applicationInWork.ShortDescription}, {applicationInWork.Solution}");


            var createdApplicationInWork = await applicationsInWorkService.Get()
                                             .Include(t => t.Application).ThenInclude(t => t!.ApplicationType)
                                             .Include(t => t.Work)
                                             //.Include(t => t.Templates)
                                             .Include(t => t.WorkGroups).ThenInclude(t => t.WorkGroup)
                                             .FirstAsync(t => t.Id == applicationInWork.Id);

            var locationUri = uriService.GetUri(ApiRoutes.Job.Get, ApiRoutes.Job.getParam, createdApplicationInWork.Id);

            var response = mapper.Map<ApplicationInWorkResponse>(createdApplicationInWork);
            // так как мы только что создали AppInW, то у него нет шаблонов, смело ставим = 0 (ускоряем запрос)
            response.TemplatesCount = 0;

            return Created(locationUri, new Response<ApplicationInWorkResponse>(response, true));
        }


        /// <summary>
        /// Обновить задание на выполнение работ (ApplicationInWork)
        /// </summary>
        /// <param name="id"></param>
        /// <param name="request"></param>
        /// <returns></returns>
        [HttpPut(ApiRoutes.Job.Update)]
        public async Task<IActionResult> Update([FromRoute] Guid id, [FromBody] ApplicationInWorkRequest request)
        {
            var resultValidate = await validator.ValidateAsync(request);
            if (!resultValidate.IsValid)
                return BadRequest(new Response(resultValidate.Errors));

            //уникальная запись по полям ApplicationId, WorkId у которой id!=[FromRoute]id
            var existSameAiW = await applicationsInWorkService.Get()
                .FirstOrDefaultAsync(t => t.Id != id && t.ApplicationId == request.ApplicationId && t.WorkId == request.WorkId);
            if (existSameAiW != null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = "Задание на выполнение работ с такими ПО и работой уже существует" } }));

            var orig = await applicationsInWorkService.Get()
                                .Include(t => t.WorkGroups)
                                .Include(t => t.EsppSchValues)
                                .FirstOrDefaultAsync(t => t.Id == id);

            if (orig == null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = $"Ошибка при изменении задания на выполнение работ. Не найдено задание с Id: {id}" } }));

            //Расписание было изменено, ниже добавим задание в очередь на обновление расписаний у связанных шаблонов
            var isScheduleChanged = IsScheduleChanged(orig, request);

            orig.WorkId = request.WorkId;
            orig.ApplicationId = request.ApplicationId;
            orig.TemplateDuration = request.TemplateDuration;
            orig.ShortDescription = request.ShortDescription.Trim();
            orig.FullDescription = request.FullDescription.Trim();
            orig.Solution = request.Solution.Trim();
            //orig.NextRun = request.NextRun;
            orig.ReferenceDate = request.ReferenceDate;
            orig.IsAutoDistributionEnabled = request.IsAutoDistributionEnabled;
            orig.IsAgent = request.IsAgent;
            orig.AgentName = request.AgentName?.Trim();
            orig.AgentTimeOutSec = request.AgentTimeOutSec;
            orig.AgentScript = request.AgentScript?.Trim();
            orig.DateModified = DateTimeOffset.UtcNow;

            //обновляем планировщик
            orig.EsppSchValues.Clear();
            request.Schedule.ForEach(item =>
            {
                orig.EsppSchValues.Add(new EsppSchValue
                {
                    ApplicationsInWorkId = orig.Id,
                    TypeConfigId = item.TypeConfigId,
                    TypeValueId = item.TypeValueId
                });
            });

            //Обновляем рабочие группы
            orig.WorkGroups.Clear();
            request.WorkGroups.ForEach(workGroupId =>
            {
                orig.WorkGroups.Add(new AppInWorkInWorkGroup
                {
                    ApplicationsInWorkId = orig.Id,
                    WorkGroupId = workGroupId
                });
            });


            if (!await applicationsInWorkService.CommitAsync())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = "Ошибка при изменении задания на выполнение работ." } }));

            logger.LogInformation($"Пользователь {User.Identity?.Name} обновил задание на выполнение работ: {orig.Id}," +
                $" {orig.WorkId}, {orig.ApplicationId}, {orig.TemplateDuration}, {orig.ShortDescription}," +
                $" {orig.FullDescription}, {orig.Solution}, {nameof(orig.IsAutoDistributionEnabled)}: {orig.IsAutoDistributionEnabled}, {orig.IsAgent}, {orig.AgentName}, {orig.AgentTimeOutSec}, {orig.AgentScript}");


            if (isScheduleChanged)
            {
                //расписание было обновлено, отправим задание в очередь на перерасчет NextRun
                var requestToMq = new TemplateDistributorMq
                {
                    ApplicationInWorkId = id
                };

                var msg = JsonSerializer.Serialize(requestToMq);

                logger.LogDebug($"Расписание в РР applicationInWorkId: {id} было изменено. Отправляем задание в очередь на перерасчет NextRun");

                var sendResult = mqService.Send(mqSettings.TemplateDistributor, new[] { msg });

                if (sendResult.IsSuccess)
                    logger.LogInformation($"Задание на перерасчет NextRun успешно отправлено в очередь MQ {mqSettings.TemplateDistributor.QueueName}");
                else
                    logger.LogError($"Ошибка при отправке задания на перерасчет NextRun в очередь MQ {mqSettings.TemplateDistributor.QueueName}");
            }

            var updatedApplicationInWork = await applicationsInWorkService.Get()
                                        .Include(t => t.Application).ThenInclude(t => t!.ApplicationType)
                                        .Include(t => t.Work)
                                        //.Include(t => t.Templates)
                                        .Include(t => t.WorkGroups).ThenInclude(t => t.WorkGroup)
                                        .FirstAsync(t => t.Id == orig.Id);

            var response = mapper.Map<ApplicationInWorkResponse>(updatedApplicationInWork);
            response.TemplatesCount = await templateService.Get().CountAsync(t => t.ApplicationInWorkId == id);

            var statistics = await GetStatisticsAsync(response.Id);
            BindStatistics(response, statistics);

            return Ok(new Response<ApplicationInWorkResponse>(response, true));

        }


        /// <summary>
        /// Удалить задание на выполнение работ (только если нет связанных шаблонов)
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpDelete(ApiRoutes.Job.Delete)]
        public async Task<IActionResult> Delete([FromRoute] Guid id)
        {
            var applicationsInWork = await applicationsInWorkService.Get()
                                            //.Include(t => t.Templates)
                                            .FirstOrDefaultAsync(t => t.Id == id);

            if (applicationsInWork == null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel {
                    Message = $"Ошибка при удалении задания на выполнение работ. Не найдено задание на выполнение работ Id: {id}"
                } }));

            var templateCount = await templateService.Get().CountAsync(t => t.ApplicationInWorkId == id);

            //if (applicationsInWork.Templates.Any())
            if (templateCount > 0)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel {
                    Message = $"Ошибка при удалении задания на выполнение работ. С данным заданием связаны шаблоны: {templateCount} шт."
                } }));

            if (!applicationsInWorkService.Delete(applicationsInWork) || !await applicationsInWorkService.CommitAsync())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel {
                    Message = $"Ошибка при удалении задания на выполнение работ"
                } }));

            logger.LogInformation($"Пользователь {User.Identity?.Name} удалил задание на выполнение работ: {applicationsInWork.Id},{applicationsInWork.WorkId}," +
                $" {applicationsInWork.ApplicationId}, {applicationsInWork.TemplateDuration}, {applicationsInWork.ShortDescription}," +
                $" {applicationsInWork.FullDescription}, {applicationsInWork.Solution}, {nameof(applicationsInWork.IsAutoDistributionEnabled)}: {applicationsInWork.IsAutoDistributionEnabled}, {applicationsInWork.IsAgent}," +
                $" {applicationsInWork.AgentName}, {applicationsInWork.AgentTimeOutSec}, {applicationsInWork.AgentScript}");

            return NoContent();
        }


        /// <summary>
        /// Проверка, были ли изменения в расписании
        /// </summary>
        /// <param name="orig"></param>
        /// <param name="request"></param>
        /// <returns></returns>
        private bool IsScheduleChanged(ApplicationsInWork orig, ApplicationInWorkRequest request)
        {
            var isScheduleChanged = false;

            if (orig.ReferenceDate != request.ReferenceDate)
                isScheduleChanged = true;

            if (request.Schedule.Count() != orig.EsppSchValues.Count())
                isScheduleChanged = true;

            if (request.IsAutoDistributionEnabled != orig.IsAutoDistributionEnabled)
                isScheduleChanged = true;

            request.Schedule.ForEach(requestSchedule =>
            {
                var schExist = orig.EsppSchValues.FirstOrDefault(t => t.ApplicationsInWorkId == orig.Id
                                                                        && t.TypeValueId == requestSchedule.TypeValueId
                                                                        && t.TypeConfigId == requestSchedule.TypeConfigId);

                if (schExist == null)
                    isScheduleChanged = true;
            });

            return isScheduleChanged;
        }


        /// <summary>
        /// Загрузка статистики
        /// </summary>
        /// <param name="applicationInWorkId"></param>
        /// <returns></returns>
        private async Task<AppInWorkStatModel> GetStatisticsAsync(Guid applicationInWorkId)
        {
            var statResult = await applicationsInWorkService.Get()
                            .Include(t => t.Templates).ThenInclude(t => t.RobotConfigurations)
                            .Where(x => x.Id == applicationInWorkId)
                            .Select(t => new
                            {
                                TemplateActivated = t.Templates.Count(x => x.IsActiveTemplate),
                                TemplateSynchronized = t.Templates.Count(x => x.RobotConfigurations.Any(c => c.TaskStatusCode == (int)TaskStatusEnum.Ok && c.RobotCode == (int)RobotsEnum.TemplateOrder)),
                                TemplateErrors = t.Templates.Count(x => x.RobotConfigurations.Any(c => c.RobotStatusCode == (int)RobotStatusEnum.Error && c.RobotCode == (int)RobotsEnum.TemplateOrder)),
                                ScheduleActivated = t.Templates.Count(x => x.IsActiveSchedule),
                                ScheduleSynchronized = t.Templates.Count(x => x.RobotConfigurations.Any(c => c.TaskStatusCode == (int)TaskStatusEnum.Ok && c.RobotCode == (int)RobotsEnum.ScheduleOrder)),
                                ScheduleErrors = t.Templates.Count(x => x.RobotConfigurations.Any(c => c.RobotStatusCode == (int)RobotStatusEnum.Error && c.RobotCode == (int)RobotsEnum.ScheduleOrder))

                            }).FirstOrDefaultAsync();

            return new AppInWorkStatModel
            {
                ScheduleStatistics = new ScheduleStats { Activated = statResult?.ScheduleActivated ?? 0, Errors = statResult?.ScheduleErrors ?? 0, Synchronized = statResult?.ScheduleSynchronized ?? 0 },
                TemplateStatistics = new TemplateStats { Activated = statResult?.TemplateActivated ?? 0, Errors = statResult?.TemplateErrors ?? 0, Synchronized = statResult?.TemplateSynchronized ?? 0 }
            };
        }


        private void BindStatistics(ApplicationInWorkResponse applicationsInWork, AppInWorkStatModel statistics)
        {
            applicationsInWork.TemplateStatistics = new TemplateStats { Activated = statistics.TemplateStatistics.Activated, Errors = statistics.TemplateStatistics.Errors, Synchronized = statistics.TemplateStatistics.Synchronized };
            applicationsInWork.ScheduleStatistics = new ScheduleStats { Activated = statistics.ScheduleStatistics.Activated, Errors = statistics.ScheduleStatistics.Errors, Synchronized = statistics.ScheduleStatistics.Synchronized };
        }
    }

    public class AppInWorkStatModel
    {
        public TemplateStats TemplateStatistics { get; set; }

        public ScheduleStats ScheduleStatistics { get; set; }
    }
}