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.DomainModels;
using PARR.DAL.Models;
using PARR.DAL.Services.Interfaces;

namespace PARR.API.Controllers.V1
{
    /// <summary>
    /// Управление работами
    /// </summary>
    [Authorize(Roles = ParrRoles.Administrator.Role)]
    public class WorkController : BaseApiController
    {
        private readonly ILogger<WorkController> logger;
        private readonly IMapper mapper;
        private readonly IWorkService workService;
        private readonly IValidator<WorkRequest> validator;
        private readonly IUriService uriService;

        public WorkController(
            ILogger<WorkController> logger,
            IMapper mapper,
            IWorkService workService,
            IValidator<WorkRequest> validator,
            IUriService uriService
            )
        {
            this.logger = logger;
            this.mapper = mapper;
            this.workService = workService;
            this.validator = validator;
            this.uriService = uriService;
        }


        /// <summary>
        /// Список видов работ постранично
        /// </summary>
        /// <param name="paginationQuery"></param>
        /// <returns></returns>
        [HttpGet(ApiRoutes.Work.GetAll)]
        public async Task<IActionResult> GetAll([FromQuery] PaginationQuery paginationQuery, [FromQuery] WorkGetAllQuery filter)
        {
            var paginationFilter = mapper.Map<PaginationFilter>(paginationQuery);

            IQueryable<Work> query = workService.Get()
                                        .OrderBy(t => t.Name);

            if (filter.AllParents)
                query = query.Include(t => t.Tnk).ThenInclude(s => s.Subprocess).ThenInclude(p => p.Process);

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

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

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

            var works = await workService.GetPage(query, paginationFilter).ToListAsync();

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

            if (filter.AllParents)
            {
                //todo: тут бесконечность в маппинге
                // респонс с иерархией вверх до процесса
                var allResponse = mapper.Map<List<WorkWithTnkResponse>>(works);
                var paginationAllResponse = new PagedResponse<WorkWithTnkResponse>(allResponse, true).GetPaginatedProps(paginationFilter, query);

                return Ok(paginationAllResponse);
            }

            var workResponse = mapper.Map<List<WorkResponse>>(works);
            var paginationResponse = new PagedResponse<WorkResponse>(workResponse, true).GetPaginatedProps(paginationFilter, query);

            return Ok(paginationResponse);
        }


        /// <summary>
        /// Получить работу по id
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpGet(ApiRoutes.Work.Get)]
        public async Task<IActionResult> GetById([FromRoute] Guid id)
        {
            var work = await workService.Get()
                                .FirstOrDefaultAsync(t => t.Id == id);

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

            var response = mapper.Map<WorkResponse>(work);

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


        /// <summary>
        /// Создать вид работы
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        [HttpPost(ApiRoutes.Work.Create)]
        public async Task<IActionResult> Create([FromBody] WorkRequest request)
        {
            var resultValidate = await validator.ValidateAsync(request);
            if (!resultValidate.IsValid)
                return BadRequest(new Response(resultValidate.Errors));

            var existName = await workService.Get().FirstOrDefaultAsync(t => t.Name.ToLower() == request.Name.Trim().ToLower());
            if (existName != null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { FieldName = nameof(request.Name), Message = $"Вид работы с именем \"{request.Name}\" уже существует." } }));

            var existEsppId = await workService.Get().FirstOrDefaultAsync(t => t.EsppId == request.EsppId);
            if (existEsppId != null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { FieldName = nameof(request.EsppId), Message = $"Вид работы с EsppId: {request.EsppId} уже существует." } }));

            var work = new Work
            {
                Id = Guid.NewGuid(),
                Name = request.Name.Trim(),
                EsppId = request.EsppId,
                TnkId = request.TnkId,
                TemplateSuffix = request.TemplateSuffix
            };

            if (!await workService.CreateAsync(work) || !await workService.CommitAsync())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = "Ошибка при создании вида работ." } }));

            logger.LogInformation($"Пользователь {User.Identity?.Name} добавил вид работ: {work.Name}, {work.EsppId}, {work.TnkId}");

            var locationUri = uriService.GetUri(ApiRoutes.Work.Get, ApiRoutes.Work.getParam, work.Id);

            return Created(locationUri, new Response<WorkResponse>(mapper.Map<WorkResponse>(work), true));
        }


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

            //проверка на уникальность esppId
            var existEsppId = await workService.Get().FirstOrDefaultAsync(t => t.Id != id && t.EsppId == request.EsppId);
            if (existEsppId != null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { FieldName = nameof(request.EsppId), Message = $"Уже есть вид работ с EsppId: {request.EsppId}" } }));


            var orig = await workService.Get()
                                .FirstOrDefaultAsync(t => t.Id == id);

            if (orig == null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = $"Ошибка при изменении вида работ. Не найдена работа Id: {id}" } }));

            orig.Name = request.Name.Trim();
            orig.EsppId = request.EsppId;
            orig.TnkId = request.TnkId;
            orig.DateModified = DateTimeOffset.UtcNow;
            orig.TemplateSuffix = request.TemplateSuffix;

            if (!await workService.CommitAsync())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = "Ошибка записи в базу данных изменений вида работ." } }));

            logger.LogInformation($"Пользователь {User.Identity?.Name} обновил работу: {orig.Id}, {orig.Name}, {orig.EsppId}, {orig.TnkId}");

            return Ok(new Response<WorkResponse>(mapper.Map<WorkResponse>(orig), true));
        }


        /// <summary>
        /// Удалить вид работ (если у него нет заданий (AppInWork))
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpDelete(ApiRoutes.Work.Delete)]
        public async Task<IActionResult> Delete([FromRoute] Guid id)
        {
            var work = await workService.Get().Include(t => t.ApplicationsInWorks).FirstOrDefaultAsync(t => t.Id == id);

            if (work == null)
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = $"Ошибка при удалении вида работ." } }));

            if (work.ApplicationsInWorks.Any())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = $"Ошибка при удалении вида работ. У данной работы есть задания ({work.ApplicationsInWorks.Count()} шт.)" } }));

            if (!workService.Delete(work) || !await workService.CommitAsync())
                return BadRequest(new Response(false, new List<ErrorModel> { new ErrorModel { Message = $"Ошибка при удалении вида работ." } }));

            logger.LogInformation($"Пользователь {User.Identity?.Name} удалил вид работ: {work.Id}, {work.Name}, {work.EsppId}, {work.TnkId}");

            return NoContent();
        }

    }
}