using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Yh.Platform.Abstractions;
using YhCore.Common;
using YhCore.Common.Config;
using YhCore.Common.UserContext;
using YhCore.Entity;
using YhCore.Model.Dto;
using YhCore.Service.Interfaces;

namespace YhCore.WebApi.Controllers.Api.Common
{
    /// <summary>
    /// 公共字典 / 文件（对应旧 Areas/Common/CommonController，路由 api/base）。
    /// 字典部分 8 接口 + 文件部分 4 接口（FileDown / FilePreview / FileUpload / FileUploadImage）已落地；
    /// 旧 [NoAuth] 语义：无需用户上下文，schId 由前端传入或取当前用户。
    /// </summary>
    [ApiController]
    [Route(ApiRoutes.ApiPath + "/base")]
    public class CommonController : ControllerBase
    {
        private readonly IDictionaryService _dict;
        private readonly IFileService _file;

        public CommonController(IDictionaryService dict, IFileService file)
        {
            _dict = dict;
            _file = file;
        }

        /// <summary>获取指定字典数据（Type 1~10）。</summary>
        [HttpGet("GetSysDic")]
        public async Task<List<DicOption>> GetSysDic([FromQuery] int type = 0)
        {
            var typeId = DictionaryTypeHelper.FromSysDicType(type);
            if (typeId == null)
            {
                throw new DException("参数错误");
            }

            return await _dict.GetDictListAsync(typeId, SchSerID());
        }

        /// <summary>字典类别列表（[NoAuth]，排除部门）。</summary>
        [HttpGet("GetDicTypeList")]
        public async Task<List<DicOption>> GetDicTypeList() => await _dict.GetDicTypeListAsync();

        /// <summary>字典列表管理（Type=0/DEPT 取全校；其他仅超管 bestsch）。</summary>
        [HttpGet("GetDictMangeList")]
        public async Task<List<DicManageItem>> GetDictMangeList([FromQuery] string type)
        {
            var typeId = DictionaryTypeHelper.ResolveTypeId(type);
            if (typeId == null)
            {
                throw new DException("参数错误");
            }

            if (DictionaryTypeHelper.IsDept(typeId))
            {
                return await _dict.GetDictMangeListAsync("DEPT", SchSerID());
            }

            //if (UserContextHolder.Current.() =1 )
            //{
            //    throw new DException("非超管不得操作！");
            //}

            return await _dict.GetDictMangeListAsync(typeId, "");
        }

        /// <summary>添加字典。</summary>
        [HttpPost("AddDic")]
        public async Task AddDic([FromBody] Common_Dictionary model)
        {
            if (model == null) throw new DException("参数错误！");

            var info = new Common_Dictionary
            {
                typeID = model.typeID,
                typeName = DictionaryTypeHelper.GetTypeName(model.typeID),
                Name = model.Name,
                Schserid = SchSerID()
            };

            await _dict.AddDicAsync(info);
        }

        /// <summary>更新字典。</summary>
        [HttpPost("UpdateDic")]
        public async Task UpdateDic([FromBody] Common_Dictionary model)
        {
            if (model == null) throw new DException("参数有误！");
            model.Schserid = SchSerID();
            await _dict.UpdateDicAsync(model);
        }

        /// <summary>编辑字典名称。</summary>
        [HttpPost("EditDic")]
        public async Task EditDic([FromBody] Common_Dictionary model)
        {
            if (model == null) throw new DException("参数有误！");
            model.Schserid = SchSerID();
            await _dict.EditDicAsync(model);
        }

        /// <summary>添加发文部门。</summary>
        [HttpPost("AddDeptDic")]
        public async Task AddDeptDic([FromBody] Common_Dictionary model)
        {
            if (model == null) throw new DException("参数有误！");

            var info = new Common_Dictionary
            {
                typeID = "DEPT",
                typeName = "部门类别",
                Name = model.Name,
                Schserid = SchSerID()
            };

            await _dict.AddDicAsync(info);
        }

        /// <summary>更新发文部门。</summary>
        [HttpPost("UpdateDeptDic")]
        public async Task UpdateDeptDic([FromBody] Common_Dictionary model)
        {
            if (model == null) throw new DException("参数有误！");
            model.Schserid = SchSerID();
            await _dict.UpdateDicAsync(model);
        }

        #region 文件：下载 / 预览 / 上传

        /// <summary>
        /// 公用下载文件（旧 FileDown，[NoAuth]）。yl=true 且为图片/PDF 时重定向到文件 URL（webapp 预览），
        /// 否则物理文件下载。
        /// </summary>
        [HttpGet("FileDown")]
        public async Task<IActionResult> FileDown([FromQuery] int id, [FromQuery] bool yl = false)
        {
            if (id == 0)
                return Ok();

            var file = await _file.GetEnclosureAsync(id);

            string[] previewArry = { ".jpg", ".gif", ".png", ".pdf", ".jpeg", ".bmp" };
            if (yl)
            {
                // 旧 sch_weboa_url.Replace("notice/api", AppType + "/") + fileurl → 新 FileWebPath + fileurl
                string fileUrl = (Config.FileWebPath ?? "") + file.fileurl;
                string suffName = Path.GetExtension(fileUrl);
                if (previewArry.Any(x => x == suffName.ToLower()))
                    return Redirect(fileUrl);
            }

            // WebHelper.DownFile：物理文件下载
            string filePath = _file.MapPhysicalPath(file.fileurl);
            if (!System.IO.File.Exists(filePath))
                return Content("请求的文件不存在！");

            string contentType = GetContentType(filePath);
            string outputFileName = file.filename ?? "file";
            return PhysicalFile(filePath, contentType, outputFileName);
        }

        /// <summary>
        /// 公用预览 office 文件（旧 FilePreview / CommonPreview，[NoAuth]）。
        /// type=1 → 返回可用预览 url（本地 .pdf 存在优先）；type=2 → 重定向本地 pdf 或 officeapps.live.com；
        /// 其余 → 重定向替换后缀为 .pdf 的地址。跳转返回 RedirectResult（全局包装过滤器不拦截）。
        /// </summary>
        [HttpGet("FilePreview")]
        public async Task<object> FilePreview([FromQuery] int id, [FromQuery] string type = null)
        {
            if (id == 0)
                throw new DException("文件ID错误！");

            var file = await _file.GetEnclosureAsync(id);

            // 公文另做处理
            if (file.fileurl != null && file.fileurl.IndexOf("gw.") > -1)
            {
                string fileUrl = "http://" + file.fileurl;
                string suffName = Path.GetExtension(fileUrl);
                string newName = fileUrl.Remove(fileUrl.LastIndexOf(suffName, StringComparison.Ordinal), suffName.Length) + ".pdf";
                return Redirect(newName);
            }

            string fileUrl2 = (Config.FileWebPath ?? "") + file.fileurl;
            string suffName2 = Path.GetExtension(fileUrl2);
            if (!string.IsNullOrEmpty(type))
            {
                // 单独读取文件是否存在
                string newFile = file.fileurl;
                string pdfFile = newFile.Remove(newFile.LastIndexOf(suffName2, StringComparison.Ordinal), suffName2.Length) + ".pdf";
                string outFile = _file.MapPhysicalPath(pdfFile);

                if (type == "1")
                {
                    if (System.IO.File.Exists(outFile)) return (Config.FileWebPath ?? "") + pdfFile;
                    return fileUrl2;
                }
                if (type == "2")
                {
                    string pdfUrl = string.Empty;
                    if (System.IO.File.Exists(outFile)) pdfUrl = (Config.FileWebPath ?? "") + pdfFile;
                    else pdfUrl = "https://view.officeapps.live.com/op/view.aspx?src=" + fileUrl2;
                    return Redirect(pdfUrl);
                }
                return "";
            }

            string newName2 = fileUrl2.Remove(fileUrl2.LastIndexOf(suffName2, StringComparison.Ordinal), suffName2.Length) + ".pdf";
            return Redirect(newName2);
        }

        /// <summary>
        /// 公用附件上传（旧 FileUpload，[NoAuth]）。
        /// chunk 参数 → 分片保存返回 {code:1,type:"chunk",msg}；fileName 参数 → 合并分片；否则单文件上传。
        /// 落库 Common_UpFiles（TopicType=AppCode），返回 {fileurl,host,fileid,name,type}。
        /// </summary>
        [HttpPost("FileUpload")]
        public async Task<object> Upload()
        {
            string apptype = "docprint"; // 旧 WebHelper.AppType 固定 docprint
            string guid = Request.Form["guid"];
            string chunk = Request.Form["chunk"];
            string fileName = Request.Form["fileName"];

            if (!string.IsNullOrEmpty(chunk))
            {
                var chunkFile = Request.Form.Files.FirstOrDefault(f => f.Name == "file") ?? Request.Form.Files.FirstOrDefault();
                await _file.SaveChunkAsync(guid, chunk, chunkFile);
                return new { code = 1, type = "chunk", msg = "分片上传成功！" };
            }

            FileObj url;
            string errMsg = "上传失败!";
            if (string.IsNullOrEmpty(fileName))
            {
                url = await _file.SaveFileAsync(apptype, Request.Form.Files.FirstOrDefault());
            }
            else
            {
                url = await _file.MergeSaveAsync(apptype, guid, fileName);
            }
            if (url == null)
                throw new DException(errMsg);

            // 旧 WebHelper.AppCode == "1102" ? "1002" : AppCode → docprint 固定 1003
            int serid = await _file.SaveEnclosureAsync(url, DocPrintConstants.AppCode.ToString());
            return new { fileurl = url.fileurl, host = url.host, fileid = serid, name = url.filename, type = url.filetype };
        }

        /// <summary>公用图片上传（旧 FileUploadImage，[NoAuth]；多图，返回数组）。</summary>
        [HttpPost("FileUploadImage")]
        public async Task<object> UploadImg()
        {
            string apptype = "docprint";
            var urlList = await _file.SaveFileImageAsync(apptype, Request.Form.Files);
            if (urlList.Count == 0)
                throw new DException("上传失败!");

            var result = new List<object>();
            foreach (var item in urlList)
            {
                int serid = await _file.SaveEnclosureAsync(item, DocPrintConstants.AppCode.ToString());
                result.Add(new { fileurl = item.fileurl, host = item.host, fileid = serid, name = item.filename, type = item.filetype });
            }
            return result;
        }

        /// <summary>按扩展名取 ContentType（替代旧 MimeMapping.GetMimeMapping）。</summary>
        private static string GetContentType(string filePath)
        {
            string ext = Path.GetExtension(filePath).ToLower();
            return ext switch
            {
                ".jpg" or ".jpeg" => "image/jpeg",
                ".gif" => "image/gif",
                ".png" => "image/png",
                ".bmp" => "image/bmp",
                ".pdf" => "application/pdf",
                ".txt" => "text/plain",
                ".doc" => "application/msword",
                ".docx" => "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
                ".xls" => "application/vnd.ms-excel",
                ".xlsx" => "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
                ".ppt" => "application/vnd.ms-powerpoint",
                ".pptx" => "application/vnd.openxmlformats-officedocument.presentationml.presentation",
                ".zip" => "application/zip",
                ".rar" => "application/x-rar-compressed",
                ".mp4" => "video/mp4",
                _ => "application/octet-stream",
            };
        }

        #endregion

        private static string SchSerID() => UserContextHolder.Current.SchSerID;
    }
}