using AsbCloudApp.Data;
using AsbCloudApp.Exceptions;
using AsbCloudApp.Repositories;
using AsbCloudApp.Requests;
using AsbCloudApp.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudWebApi.Controllers
{
#nullable enable
    /// <summary>
    /// контроллер по работе с faq-вопросами
    /// </summary>
    [Route("api/well/{idWell}/faq")]
    [ApiController]
    [Authorize]
    public class FaqController : ControllerBase
    {
        private readonly IFaqRepository faqRepository;
        private readonly IWellService wellService;

        public FaqController(IFaqRepository faqRepository, IWellService wellService)
        {
            this.faqRepository = faqRepository;
            this.wellService = wellService;
        }

        /// <summary>
        /// получение списка faq-вопросов
        /// </summary>
        /// <param name="idWell"></param>
        /// <param name="request"></param>
        /// <param name="token"></param>
        /// <returns></returns>
        [HttpGet]
        [Permission]
        [ProducesResponseType(typeof(IEnumerable<FaqDto>), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> GetAsync(
            [FromRoute] int idWell,
            [FromQuery] FaqRequestBase request,
            CancellationToken token)
        {
            if (!await CanUserAccessToWellAsync(idWell, token).ConfigureAwait(false))
                return Forbid();

            var requestToRepository = new FaqRequest(request, idWell);

            var result = await faqRepository.GetAsync(
                requestToRepository,
                token)
                .ConfigureAwait(false);
            return Ok(result);
        }

        /// <summary>
        /// добавление нового вопроса
        /// </summary>
        /// <param name="idWell">ключ скважины</param>
        /// <param name="faqDto">вопрос</param>
        /// <param name="token"></param>
        /// <returns></returns>
        [HttpPost]
        [Permission]
        [ProducesResponseType(typeof(FaqDto), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> InsertAsync(
                [Range(1, int.MaxValue, ErrorMessage = "Id скважины не может быть меньше 1")] int idWell,
                [FromBody] FaqDto faqDto,
                CancellationToken token)
        {
            if (!await CanUserAccessToWellAsync(idWell, token).ConfigureAwait(false))
                return Forbid();

            faqDto.IdWell = idWell;
            faqDto.IdAuthorQuestion = User.GetUserId()!.Value;

            var result = await faqRepository.InsertAsync(faqDto, token)
                .ConfigureAwait(false);

            return Ok(result);
        }

        [HttpPut]
        [ProducesResponseType(typeof(int), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> UpdateAsync(int idWell, [FromBody] FaqDto faqDto, CancellationToken token)
        {
            if (!await CanUserAccessToWellAsync(idWell, token).ConfigureAwait(false))
                return Forbid();

            faqDto.IdAuthorAnswer = User.GetUserId()!.Value;

            var result = await faqRepository.UpdateAsync(faqDto, token)
                .ConfigureAwait(false);
            return Ok(result);
        }

        /// <summary>
        /// Объединение 2 вопросов в один
        /// </summary>
        /// <param name="idWell">ключ скважины</param>
        /// <param name="sourceIds">ключи вопросов, подлежащих объединению</param>
        /// <param name="mergeTexts">настройка, объединять ли текст 2-х вопросов в один или нет</param>
        /// <param name="token"></param>
        /// <returns></returns>
        /// <exception cref="ArgumentInvalidException"></exception>
        [HttpGet("merge")]
        [ProducesResponseType(typeof(int), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> MergeAsync(
            int idWell,
            [FromQuery] IEnumerable<int> sourceIds,
            [FromQuery] bool mergeTexts,
            CancellationToken token)
        {
            if (!await CanUserAccessToWellAsync(idWell, token).ConfigureAwait(false))
                return Forbid();
            if (sourceIds.Count() < 2)
                throw new ArgumentInvalidException("Count of questions must be more than 1", nameof(sourceIds));

            var result = await faqRepository.MergeAsync(sourceIds, mergeTexts, token)
                .ConfigureAwait(false);
            return Ok(result);
        }

        /// <summary>
        /// Удаляет вопрос
        /// </summary>
        /// <param name="idWell">id скважины</param>
        /// <param name="id">id вопроса</param>
        /// <param name="token">Токен отмены задачи</param>
        /// <returns>Количество удаленных из БД строк</returns>
        [HttpDelete("{id}")]
        [Permission]
        [ProducesResponseType(typeof(int), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> DeleteAsync(int idWell, int id, CancellationToken token)
        {
            if (!await CanUserAccessToWellAsync(idWell,
                token).ConfigureAwait(false))
                return Forbid();

            var result = await faqRepository.MarkAsDeletedAsync(idWell, id, token)
                .ConfigureAwait(false);

            return Ok(result);
        }

        private async Task<bool> CanUserAccessToWellAsync(int idWell, CancellationToken token)
        {
            int? idCompany = User.GetCompanyId();
            return idCompany is not null && await wellService.IsCompanyInvolvedInWellAsync((int)idCompany,
                idWell, token).ConfigureAwait(false);
        }
    }
#nullable disable
}