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.Constants;
using PARR.DAL.Contracts;
using PARR.DAL.DomainModels;
using PARR.DAL.Models.Job;
using PARR.DAL.Services.Interfaces;
using PARR.DAL.Services.Interfaces.Job;

namespace PARR.API.Controllers.V1
{
    /// <summary>
    /// Управление работами
    /// </summary>
    [Authorize(Roles = ParrRoles.Administrator.Role)]
    public class JobController : BaseApiController
    {
        private readonly ILogger<JobController> logger;
        private readonly IMapper mapper;
        private readonly IUriService uriService;
        private readonly IJobService jobService;
        private readonly ITemplateService templateService;
        private readonly IValidator<JobRequest> validator;

        public JobController(
            ILogger<JobController> logger,
            IMapper mapper,
            IUriService uriService,
            IJobService jobService,
            ITemplateService templateService,
            IValidator<JobRequest> validator
            )
        {
            this.logger = logger;
            this.mapper = mapper;
            this.uriService = uriService;
            this.jobService = jobService;
            this.templateService = templateService;
            this.validator = validator;
        }

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

            IQueryable<Job> query = jobService.Get();

            query = query.OrderBy(t => t.Name);

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

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

            if (filter.IsFull)
            {
                query = query
                    .Include(t => t.Tnk)
                    .Include(t => t.Group);

                query = query
                    .Include(t => t.UnitFilters)
                        .ThenInclude(t => t.FieldFilters)
                            .ThenInclude(t => t.Field)
                    .Include(t => t.UnitFilters)
                        .ThenInclude(t => t.RelationshipFilters)
                            .ThenInclude(t => t.UnitField);
            }

            var jobs = await jobService.GetPage(query, paginationFilter).ToListAsync();

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

            var response = mapper.Map<List<JobResponse>>(jobs);//TODO Migration to job

            var paginationResponse = new PagedResponse<JobResponse>(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 job = await jobService.Get()
                                .Include(t => t.Tnk)
                                .Include(t => t.Group)
                                .Include(t => t.UnitFilters)
                                    .ThenInclude(t => t.FieldFilters)
                                        .ThenInclude(t => t.Field)
                                .Include(t => t.UnitFilters)
                                    .ThenInclude(t => t.RelationshipFilters)
                                .FirstOrDefaultAsync(t => t.Id == id);

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

            var response = mapper.Map<JobResponse>(job);

            response.TemplatesCount = await templateService.Get().CountAsync(t => t.JobId == id);

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

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


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

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

            var job = new Job
            {
                Id = Guid.NewGuid(),
                Name = request.Name.Trim(),
                WorkName = request.WorkName.Trim(),
                MinValueRelationships = request.MinValueRelationships,
                MaxValueRelationships = request.MaxValueRelationships,
                isParentRelationships = request.isParentRelationships,
                TemplateNameMask = request.TemplateNameMask.Trim(),
                WorkGroupMask = request.WorkGroupMask.Trim(),
                TnkId = request.TnkId,
                GroupId = request.GroupId
            };


            if (!await jobService.CreateAsync(job) || !await jobService.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: {job.Id}, {job.Name}, {job.WorkName}");


            var createdJob = await jobService.Get().Include(t => t.Tnk)
                                             .FirstAsync(t => t.Id == job.Id);

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

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

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


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

            var orig = await jobService.Get().Include(t => t.Tnk)
                                .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}" } }));

            orig.Name = request.Name.Trim();
            orig.WorkName = request.WorkName.Trim();
            orig.MinValueRelationships = request.MinValueRelationships;
            orig.MaxValueRelationships = request.MaxValueRelationships;
            orig.isParentRelationships = request.isParentRelationships;
            orig.TemplateNameMask = request.TemplateNameMask.Trim();
            orig.WorkGroupMask = request.WorkGroupMask.Trim();
            orig.TnkId = request.TnkId;
            orig.GroupId = request.GroupId;

            if (!await jobService.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.Name}, {orig.WorkName}, {orig.MinValueRelationships}, {orig.MaxValueRelationships}," +
                $" {orig.TemplateNameMask}, {orig.TnkId}, {nameof(orig.GroupId)}");


            var updatedApplicationInWork = await jobService.Get().Include(t => t.Tnk)
                                        .FirstAsync(t => t.Id == orig.Id);

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

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

            return Ok(new Response<JobResponse>(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 job = await jobService.Get().Include(t => t.Tnk)
                                .FirstOrDefaultAsync(t => t.Id == id);

            if (job == 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.JobId == id);

            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 (!jobService.Delete(job) || !await jobService.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: {job.Id},{job.Name}," +
                $" {job.WorkName}, {job.MinValueRelationships}, {job.MaxValueRelationships}," +
                $" {job.TemplateNameMask}, {job.TnkId}, {job.GroupId}");

            return NoContent();
        }


        /// <summary>
        /// Загрузка статистики
        /// </summary>
        /// <param name="jobId"></param>
        /// <returns></returns>
        private async Task<JobStatModel> GetStatisticsAsync(Guid jobId)
        {
            var statResult = await jobService.Get()
                            .Include(t => t.Templates)
                                .ThenInclude(t => t.RobotConfigurations)
                            .Where(x => x.Id == jobId)
                            .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 JobStatModel
            {
                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(JobResponse job, JobStatModel statistics)
        {
            //job.TemplateStatistics = new TemplateStats { Activated = statistics.TemplateStatistics.Activated, Errors = statistics.TemplateStatistics.Errors, Synchronized = statistics.TemplateStatistics.Synchronized };
            //job.ScheduleStatistics = new ScheduleStats { Activated = statistics.ScheduleStatistics.Activated, Errors = statistics.ScheduleStatistics.Errors, Synchronized = statistics.ScheduleStatistics.Synchronized };
        }


    }

    public class JobStatModel
    {
        public required TemplateStats TemplateStatistics { get; set; }

        public required ScheduleStats ScheduleStatistics { get; set; }
    }
}