using AutoMapper;
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.Contracts.V1.Responses.Statistics;
using PARR.API.Controllers.V1.Base;
using PARR.API.Services.Interfaces;
using PARR.DAL.Services.Interfaces;

namespace PARR.API.Controllers.V1.Statistics
{
    /// <summary>
    /// Статистика загрузки регламентными работами по Видам работ(ApplicationInWorks)
    /// </summary>
    public class StatWorkWorkLoadController : BaseApiController
    {
        private readonly ITemplateService templateService;
        private readonly IWorkLoadService workLoadService;
        private readonly IMapper mapper;
        private readonly ILogger<StatWorkWorkLoadController> logger;

        public StatWorkWorkLoadController(
                ITemplateService templateService,
                IWorkLoadService workLoadService,
                IMapper mapper,
                ILogger<StatWorkWorkLoadController> logger
            )
        {
            this.templateService = templateService;
            this.workLoadService = workLoadService;
            this.mapper = mapper;
            this.logger = logger;
        }


        /// <summary>
        /// Статистика загрузки регламентными работами по Видам работ(ApplicationInWorks)
        /// </summary>
        /// <param name="workGroupId"></param>
        /// <param name="requestQuery"></param>
        /// <returns></returns>
        [HttpGet(ApiRoutes.StatWorkWorkLoad.Get)]
        public async Task<IActionResult> Get([FromRoute] Guid workGroupId, [FromQuery] WorkloadBaseQuery requestQuery)
        {
            var response = await GetStatisticsAsync(workGroupId, requestQuery);

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


        /// <summary>
        /// Статистика загрузки РР по списку РР
        /// </summary>
        /// <param name="requestBody"></param>
        /// <returns></returns>
        [HttpPost(ApiRoutes.StatWorkWorkLoad.GetByApplicationInWork)]
        public async Task<IActionResult> GetByApplicationInWork([FromBody] StatWorkWorkLoadRequest requestBody)
        {
            var response = await GetStatisticsAsync(null, requestBody.Filter, requestBody.Jobs);

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


        private async Task<List<StatWorkWorkLoadResponse>> GetStatisticsAsync(Guid? workGroupId, WorkloadBaseQuery requestQuery, List<Guid>? applicationInWorks = null)
        {
            //защита от дурака, чтоб не выгрузить всю БД
            if (workGroupId == null && (applicationInWorks == null || applicationInWorks.Count() == 0))
            {
                logger.LogWarning($"Пытались выполнить запрос получения статситики с нулевыми параметрами {nameof(workGroupId)}, {nameof(applicationInWorks)}. Controller {nameof(StatWorkWorkLoadController)}");
                return new List<StatWorkWorkLoadResponse>();
            }


            var daysList = workLoadService.GetDatesForPeriod(requestQuery);

            IQueryable<DAL.Models.Template> query = templateService.Get()
                                            .Include(t => t.Host);

            query = workLoadService.FilterTemplatesQuery(query, requestQuery);//.Where(t => t.Host!.WorkGroupId == workGroupId);

            if (workGroupId.HasValue)
                query = query.Where(t => t.Host!.WorkGroupId == workGroupId.Value);

            if (applicationInWorks != null && applicationInWorks.Count() > 0)
                query = query.Where(t => applicationInWorks.Any(x => x == t.ApplicationInWorkId));

            var groupedQuery = query.GroupBy(t => new { t.NextRun.DateTime.Date, t.ApplicationInWorkId })
                                    .Select(t => new
                                    {
                                        ApplicationInWorkId = t.Key.ApplicationInWorkId,
                                        Date = t.Key.Date,
                                        TemplateCount = t.Count()
                                    });

            var queryResult = await groupedQuery.ToListAsync();


            // получаем только работы по которым есть шаблоны (активированные/деакт) и за любой период
            IQueryable<DAL.Models.Template> appInWorksQuery = templateService.Get()
                                                    .Include(t => t.Host)
                                                    .Include(t => t.ApplicationsInWork).ThenInclude(t => t.Application).ThenInclude(t => t.ApplicationType);


            if (workGroupId.HasValue)
                appInWorksQuery = appInWorksQuery.Where(t => t.Host.WorkGroupId == workGroupId);

            if (applicationInWorks != null && applicationInWorks.Count() > 0)
                appInWorksQuery = appInWorksQuery.Where(t => applicationInWorks.Any(x => x == t.ApplicationInWorkId));


            var appInWorks = await appInWorksQuery.Select(t => t.ApplicationsInWork)
                                                .Distinct()
                                                .ToListAsync();

            var response = new List<StatWorkWorkLoadResponse>();

            appInWorks.ForEach(appInWork =>
            {
                var workLoads = daysList.Select(t => new StatWorkLoadDataResponse
                {
                    Date = t,
                    TemplateCount = queryResult.FirstOrDefault(x => x.ApplicationInWorkId == appInWork.Id && x.Date.Date == t.Date)?.TemplateCount ?? 0
                }).OrderBy(t => t.Date).ToList();

                response.Add(new StatWorkWorkLoadResponse
                {
                    Job = mapper.Map<ApplicationInWorkBaseResponse>(appInWork),
                    WorkLoad = workLoads
                });
            });

            response = response.OrderBy(t => t.Job.ShortDescription).ThenBy(t => t.Job.Application?.Name).ToList();


            return response;
        }

    }
}