using EntrustSettle.Common;
using EntrustSettle.Controllers;
using EntrustSettle.IServices;
using EntrustSettle.Model;
using EntrustSettle.Model.Models;
using EntrustSettle.Model.Validator;
using FluentValidation;
using Microsoft.AspNetCore.Mvc;

namespace EntrustSettle.Api.Controllers
{
    /// <summary>
    /// 附件
    /// </summary>
    public class AnnexController : BaseApiController
    {
        private readonly IAnnexService annexService;
        private readonly IOrderAnnexService orderAnnexService;

        public AnnexController(IAnnexService annexService, IOrderAnnexService orderAnnexService)
        {
            this.annexService = annexService;
            this.orderAnnexService = orderAnnexService;
        }

        ///// <param name="orderId">可选；文件类型为反馈附件时的订单主键</param>
        ///// <param name="appendRemark">可选；文件类型为反馈附件时追加的备注信息</param>
        /// <summary>
        /// 附件上传接口
        /// </summary>
        /// <param name="file">附件文件</param>
        /// <param name="fileType">文件类型</param>
        [HttpPost]
        public async Task<MessageModel<long>> Upload([FromForm] IFormFile file,
                                                         [FromForm] FileTypeEnum fileType)
        {
            if (file == null)
            {
                return Failed<long>("附件不能为空");
            }
            new FileTypeEnumValidator().ValidateAndThrow(fileType);

            // 文件目录
            var dir = Path.Combine(App.WebHostEnvironment.WebRootPath, "files");
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            // 文件名
            var newFileName = Guid.NewGuid().ToString("N") + Path.GetExtension(file.FileName);

            // 完整路径
            var fullPath = Path.Combine(dir, newFileName);

            // 保存
            using (var stream = new FileStream(fullPath, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            }

            // 保存文件信息到数据库
            var model = new Annex()
            {
                Name = file.FileName,
                Path = Path.Combine(dir, newFileName),
                Type = (byte)fileType
            };
            var annexId = await annexService.Add(model);

            return Success(annexId);
        }

        /// <summary>
        /// 文件下载接口
        /// </summary>
        [HttpGet]
        public async Task<IActionResult> DownloadFile(long annexId)
        {
            // 如果当前登陆人非本公司，判断要下载的文件所属订单是否属于登陆人所在公司
            if (!App.User.CompanyName.Contains("东胜伟业") && !App.User.CompanyName.Contains("大简云"))
            {
                var compId = await orderAnnexService.AsQueryable()
                                              .InnerJoin<Order>((an, o) => an.OrderId == o.Id)
                                              .Where(an => an.AnnexId == annexId)
                                              .Select((an, o) => o.CompanyId)
                                              .FirstAsync();

                if (compId != App.User.CompanyId)
                {
                    throw new Exception("附件所属订单与登陆人不匹配");
                }
            }
            var file = await annexService.QueryById(annexId);
            if (file == null)
            {
                return NotFound();
            }
            var filePath = Path.Combine(App.WebHostEnvironment.WebRootPath, "files", file.Path);
            if (!System.IO.File.Exists(filePath))
            {
                return NotFound();
            }
            var stream = new FileStream(file.Path, FileMode.Open);
            return File(stream, "application/octet-stream", file.Name);
        }
    }
}