using AsbCloudApp.Data;
using AsbCloudApp.Data.DetectedOperation;
using AsbCloudApp.Requests;
using AsbCloudApp.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudWebApi.Controllers.SAUB
{
    /// <summary>
    /// Операции определенные по телеметрии САУБ
    /// </summary>
    [Route("api/[controller]")]
    [ApiController]
    [Authorize]
    public class DetectedOperationController : ControllerBase
    {
        private readonly IDetectedOperationService detectedOperationService;
        private readonly IWellService wellService;

        public DetectedOperationController(IDetectedOperationService detectedOperationService, IWellService wellService)
        {
            this.detectedOperationService = detectedOperationService;
            this.wellService = wellService;
        }

        /// <summary>
        /// получить справочник операций. Отличается от операций заводимых вручную.
        /// При задании id скважины вернет только те операции, которые определились в телеметрии этой скважины.
        /// </summary>
        /// <param name="idWell">[опционально] id скважины</param>
        /// <param name="token"></param>
        /// <returns></returns>
        [HttpGet("categories")]
        [ProducesResponseType(typeof(IEnumerable<WellOperationCategoryDto>), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> GetCategoriesAsync([FromQuery] int? idWell, CancellationToken token)
        {
            var result = await detectedOperationService.GetCategoriesAsync(idWell, token);
            return Ok(result);
        }

        /// <summary>
        /// Получить фильтрованный список операций по телеметрии САУБ
        /// </summary>
        /// <param name="request"></param>
        /// <param name="token"></param>
        /// <returns></returns>
        [HttpGet]
        [ProducesResponseType(typeof(DetectedOperationListDto), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> GetAsync(
            [FromQuery] DetectedOperationRequest request,
            CancellationToken token)
        {
            if (!await UserHasAccesToWellAsync(request.IdWell, token))
                return Forbid();

            var result = await detectedOperationService.GetAsync(request, token);
            return Ok(result);
        }

        /// <summary>
        /// Получить статистику по фильтрованному списку операций по телеметрии САУБ
        /// </summary>
        /// <param name="request"></param>
        /// <param name="token"></param>
        /// <returns></returns>
        [HttpGet("stat")]
        [ProducesResponseType(typeof(IEnumerable<DetectedOperationStatDto>), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> GetStatAsync(
            [FromQuery] DetectedOperationRequest request,
            CancellationToken token)
        {
            if (!await UserHasAccesToWellAsync(request.IdWell, token))
                return Forbid();

            var result = await detectedOperationService.GetOperationsStatAsync(request, token);
            return Ok(result);
        }

        /// <summary>
        /// Удалить операции.
        /// Удаленные операции будут определены повторно сервисом автоматизированного определения операций.
        /// Может потребоваться при изменении алгоритмов определения
        /// </summary>
        /// <param name="request"></param>
        /// <param name="token"></param>
        /// <returns></returns>
        [HttpDelete]
        [Permission]
        [ProducesResponseType(typeof(int), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> DeleteAsync(
            [FromQuery] DetectedOperationRequest request,
            CancellationToken token)
        {
            if (!await UserHasAccesToWellAsync(request.IdWell, token))
                return Forbid();

            var result = await detectedOperationService.DeleteAsync(request, token);
            return Ok(result);
        }

        protected async Task<bool> UserHasAccesToWellAsync(int idWell, CancellationToken token)
        {
            var idCompany = User.GetCompanyId();
            if (idCompany is not null &&
                await wellService.IsCompanyInvolvedInWellAsync((int)idCompany, idWell, token)
                    .ConfigureAwait(false))
                return true;
            return false;
        }

        /// <summary>
        /// Создает excel файл с операциями по скважине
        /// </summary>
        /// <param name="idWell">id скважины</param>
        /// <param name="idCluster"></param>
        /// <param name="token"> Токен отмены задачи </param>
        /// <returns>Запрашиваемый файл</returns>
        [HttpGet]
        [Route("export")]
        [Permission]
        [ProducesResponseType(typeof(PhysicalFileResult), (int)System.Net.HttpStatusCode.OK)]
        public async Task<IActionResult> ExportAsync(int? idWell, int? idCluster, CancellationToken token)
        {
            if (idCluster is null && idWell is null)
                return this.MakeBadRequest(nameof(idWell), $"One of {nameof(idWell)} or {nameof(idCluster)} mast be set.");

            int? idCompany = User.GetCompanyId();

            if (idCompany is null)
                return Forbid();

            IEnumerable<int> idsWells;
            if (idCluster is not null)
            {
                var companyWells = await wellService.GetAsync(new() { IdCompany = idCompany }, token);
                idsWells = companyWells.Where(w => w.IdCluster == idCluster)
                    .Select(w=>w.Id);
            }
            else
            {
                if (!await wellService.IsCompanyInvolvedInWellAsync((int)idCompany,
                    idWell!.Value, token).ConfigureAwait(false))
                    return Forbid();
                idsWells = new List<int> { (int)idWell };
            }

            var stream = await detectedOperationService.ExportAsync(idsWells, token);
            var fileName = "operations.xlsx";
            return File(stream, "application/octet-stream", fileName);
        }
    }
}