using DataLoader.Model;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

namespace DataLoader.CS
{
    public class Importor
    {
        /// <summary>
        /// 获取文件
        /// </summary>
        public static void GetFiles(ObservableCollection<ViewData> viewDatas)
        {
            string[] files = Directory.GetFiles(CommonProp.SourcePath);
            for (int i = 0, c = files.Length; i < c; i++)
            {
                ViewData vd = new ViewData();
                vd.ID = i + 1;
                vd.FilePath = files[i];
                vd.Ext = System.IO.Path.GetExtension(files[i]);
                vd.Status = "准备";
                viewDatas.Add(vd);

                SetSysMeta(vd);
            }
        }

        /// <summary>
        /// 数据导入
        /// </summary>
        public static void ImportFiles(ObservableCollection<ViewData> viewDatas)
        {
            Parallel.ForEach(viewDatas, (vd, ParallelLoopState) =>
            {
                try
                {
                    //

                    SysMeta meta = new SysMeta();
                    //

                    int id = DBHelper.InsertMeta(meta);
                    vd.Status = id > 0 ? "成功。" : "失败！";
                }
                catch (Exception ex)
                {
                    LogOut.Error(ex.StackTrace);
                    vd.Status = string.Format("失败：{0}！", ex.Message);
                }
            });
        }

        /// <summary>
        /// 复制文件
        /// </summary>
        private static void CopyFile(string source, string target)
        {
            if (File.Exists(source))
            {
                File.Copy(source, target, true);
            }
        }

        public static void GetFiles(ObservableCollection<ViewData> viewDatas, string source)
        {
            string[] files = Directory.GetFiles(source);
            for (int i = 0, c = files.Length; i < c; i++)
            {
                ViewData vd = new ViewData();
                vd.ID = i + 1;
                vd.FilePath = files[i];
                vd.Ext = System.IO.Path.GetExtension(files[i]);
                vd.Status = "准备";
                viewDatas.Add(vd);

                SetSysMeta(vd);
            }
        }

        private static void SetSysMeta(ViewData vd)
        {
            FileInfo fi = new FileInfo(vd.FilePath);

            vd.Meta = new SysMeta();
            vd.Meta.name = fi.Name;
            //vd.Meta.dirid = Common.DirId;
            //vd.Meta.depid = 1;
            vd.Meta.verid = 0;
            vd.Meta.type = fi.Extension.ToLower().Replace(".", "");
            vd.Meta.sizes = Tools.SizeToMb(fi.Length);
            vd.Meta.create_user = CommonProp.UserId;
        }

        public static void ImportFiles(ObservableCollection<ViewData> viewDatas, string target, int start)
        {
            /*Parallel.ForEach(viewDatas, (vd, ParallelLoopState) =>
            {
                try
                {
                    vd.Status = "生成MD5码...";
                    string guid = MD5Helper.GetMD5Hash(vd.FilePath);
                    if (!Exclusions.Contains(vd.Ext) && IsFileExists(guid))
                    {
                        vd.Status = "已存在！";
                        return;
                    }

                    vd.Status = "获取数据目录...";
                    int subPath = GetSubPath(target, start);
                    SysMeta mf = GetMetaFile(vd, subPath, guid);

                    vd.Status = "复制文件...";
                    CopyFile(vd.FilePath, Path.Combine(target, mf.path));

                    vd.Status = "准备入库";
                    vd.Meta = mf;
            });*/
        }

        public static void ImportFiles2(ObservableCollection<ViewData> viewDatas, string target)
        {
            int start = 1;
            foreach (ViewData vd in viewDatas)
            {
                try
                {
                    vd.Status = "插入数据库...";
                    start = GetSubPath(target, start);
                    SysMeta mf = GetMetaFile(vd, start, "");

                    int metaId = 0; // InsertMeta(mf);
                    if (metaId == 0)
                    {
                        vd.Status = "元数据出错！";
                        continue;
                    }

                    vd.Status = "复制文件...";
                    CopyFile(vd.FilePath, Path.Combine(target, mf.path));

                    vd.Status = "完成。";
                }
                catch (Exception ex)
                {
                    LogOut.Error(ex.Message + "\r\n" + ex.StackTrace);
                    vd.Status = "失败！";
                }
            }
        }

        private static int GetSubPath(string target, int start = 1)
        {
            while (true)
            {
                string path = Path.Combine(target, start.ToString());
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                    return start;
                }

                string[] files = Directory.GetFiles(path);
                if (files.Length < 2001)
                {
                    return start;
                }

                start++;
            }
        }

        private static SysMeta GetMetaFile(ViewData vd, int subPath, string guid)
        {
            SysMeta mf = new SysMeta();
            mf.eventid = Guid.NewGuid().ToString();
            mf.metaid = 0;
            //mf.dirid = vd.Meta.dirid;
            //mf.depid = vd.Meta.depid;
            mf.verid = vd.Meta.verid;
            mf.name = vd.Meta.name;
            mf.type = vd.Meta.type;
            mf.guid = guid;
            mf.path = subPath + "\\" + mf.name;
            mf.sizes = vd.Meta.sizes;
            mf.tab = null;
            mf.rows = 0;
            mf.create_user = vd.Meta.create_user;

            return mf;
        }
    }
}