using ExportMap.db;
using ExportMap.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace ExportMap.cs
{
    public class LasUtils
    {
        /// <summary>
        /// 获取路径
        /// </summary>
        public static string GetPath(int id)
        {
            return Path.Combine(SGUtils.LFData, "3d\\3dtiles\\las", id.ToString());
        }

        /// <summary>
        /// 获取发布地址
        /// </summary>
        public static string GetReleaseUrl(string path)
        {
            return "http://{host}/LFData/" + path.Replace("\\", "/");
        }

        /// <summary>
        /// 生成
        /// </summary>
        /// <param name="args">XYZ参数</param>
        /// <param name="err">错误信息</param>
        /// <returns>数据发布ID集合</returns>
        public static List<int> Generate(XYZArgs args, ref string err)
        {
            try
            {
                List<SysMeta> list = XYZUtils.SelectMetas(args.ids, "and type in ('las', 'laz')");
                if (null == list || list.Count == 0) return null;

                string tilerPath = Tools.GetSetting("tilerPath");
                string uploadFolder = Tools.GetSetting("uploadFolder");

                List<int> ids = new List<int>();
                foreach (SysMeta meta in list)
                {
                    string lasPath = Path.Combine(uploadFolder, meta.path);
                    if (!File.Exists(lasPath)) continue;

                    meta.ismeta = 0; // 0-倾斜摄影数据
                    string outPath = GetPath(meta.id);

                    if (Directory.Exists(outPath)) Tools.DelPath(outPath);
                    if (!Directory.Exists(outPath)) Directory.CreateDirectory(outPath);
                    if ("laz" == meta.type) lasPath = toLas(lasPath, Path.Combine(outPath, meta.id + ".las"));

                    string cmd = string.Format("{0}\\gocesiumtiler.exe -i \"{1}\" -o \"{2}\" -e {3} -z {4} -g -s", tilerPath, lasPath, outPath, args.srid, args.z);
                    err = Tools.ExecCmd(cmd, false, false);

                    string jsonFile = findTileset(meta, outPath);
                    if ("laz" == meta.type && File.Exists(lasPath)) File.Delete(lasPath);
                    if (File.Exists(jsonFile))
                    {
                        string path = jsonFile.Replace(Tools.GetSetting("lfData") + "\\", "");
                        int pubid = InsertToDB(meta, args, path);
                        if (pubid > 0) ids.Add(pubid);
                    }
                }

                return ids;
            }
            catch (Exception ex)
            {
                LogOut.Error(ex.Message + "\r\n" + ex.StackTrace);
                err = ex.Message;
                return null;
            }
        }

        /// <summary>
        /// laz 转换为 las
        /// </summary>
        private static string toLas(string lazPath, string outPath)
        {
            string lasPath = outPath.Replace("laz", "laz");
            string tilerPath = Tools.GetSetting("tilerPath");

            string cmd = string.Format("{0}\\laszip64.exe -i \"{1}\" -o \"{2}\"", tilerPath, lazPath, lasPath);
            Tools.ExecCmd(cmd, false, false);

            return lasPath;
        }

        /// <summary>
        /// 查找tileset.json
        /// </summary>
        private static string findTileset(SysMeta meta, string path)
        {
            PathRename(meta, path);

            DirectoryInfo di = new DirectoryInfo(path);
            FileInfo[] fis = di.GetFiles("tileset.json", SearchOption.AllDirectories);

            return null == fis || 0 == fis.Length ? null : fis[0].FullName;
        }

        /// <summary>
        /// 路径重命名
        /// </summary>
        private static void PathRename(SysMeta meta, string path)
        {
            try
            {
                string subPath = Path.Combine(path, meta.guid);
                if (Directory.Exists(subPath))
                {
                    string newPath = Path.Combine(path, meta.id.ToString());
                    Directory.Move(subPath, newPath);
                }
            }
            catch
            {
            }
        }

        /// <summary>
        /// 插入数据库
        /// </summary>
        private static int InsertToDB(SysMeta meta, XYZArgs args, string path)
        {
            if (PubDBHelper.IsPublish(meta.id)) return 1;

            SysPublish sys = Tools.NewPublish(meta, args, GetReleaseUrl(path), path);

            int pubid = PubDBHelper.InsertPublish(sys);
            if (pubid > 0)
            {
                sys.id = pubid;
                PubDBHelper.InsertLayer(sys, meta);
                PubDBHelper.InsertMetaPub(meta.id, pubid, args.userId);
            }

            return pubid;
        }

        /// <summary>
        /// 读取Las坐标系
        /// </summary>
        public static List<int> ReadLasCs(XYZArgs args, ref string err)
        {
            List<SysMeta> list = XYZUtils.SelectMetas(args.ids, "and type in ('las', 'laz')");
            if (null == list || list.Count == 0) return null;

            string uploadFolder = Tools.GetSetting("uploadFolder");

            List<int> ids = new List<int>();
            foreach (SysMeta meta in list)
            {
                string lasPath = Path.Combine(uploadFolder, meta.path);
                if (!File.Exists(lasPath)) continue;

                int epsg = 0;
                try
                {
                    epsg = Tools.get_las_cs(lasPath.Replace("\\", "/"));
                }
                catch (Exception ex)
                {
                    LogOut.Error(ex.Message + "\r\n" + ex.StackTrace);
                    epsg = -1;
                }
                ids.Add(epsg);
            }

            return ids;
        }
    }
}