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

namespace ExportMap.cs
{
    public class TerraUtils
    {
        private static string pyFile;

        /// <summary>
        /// 获取Python文件
        /// </summary>
        public static string PyFile
        {
            get
            {
                if (string.IsNullOrWhiteSpace(pyFile))
                {
                    pyFile = Path.Combine(ExportUtil.SourcesPath, "merge.py");
                }

                return pyFile;
            }
        }

        /// <summary>
        /// QGIS工程
        /// </summary>
        public static string Qgz
        {
            get
            {
                //return Path.Combine(ExportUtil.SourcesPath, "xyz.qgz");
                return "xyz.qgz";
            }
        }

        /// <summary>
        /// bat路径
        /// </summary>
        public static string BatPath
        {
            get
            {
                return @"C:\Program Files\QGIS 3.16\bin\";
            }
        }

        /// <summary>
        /// 基础bat文件
        /// </summary>
        public static string BaseBat
        {
            get
            {
                // python-qgis-ltr.bat，qgis_process-qgis-ltr.bat
                return @"C:\Program Files\QGIS 3.16\bin\qgis_process-qgis-ltr.bat";
            }
        }

        /// <summary>
        /// 获取发布地址
        /// </summary>
        public static string GetReleaseUrl(string dircode)
        {
            return "http://{host}/LFData/3d/terrain/" + dircode;
        }

        /// <summary>
        /// 获取地形路径
        /// </summary>
        public static string GetTerrainPath(string dircode)
        {
            return Path.Combine(SGUtils.LFData, "3d\\terrain", dircode);
        }

        /// <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)
        {
            string tifFile = null;
            try
            {
                //tifFile = Merge(args, ref err);
                tifFile = Path.Combine(GetTerrainPath(args.dircode), args.dircode + ".tif");
                if (!File.Exists(tifFile)) return null;

                Generate(args, tifFile, ref err);
                Save(args);

                return null;
            }
            catch (Exception ex)
            {
                LogOut.Error(ex.Message);
                err = ex.Message;
                return null;
            }
            finally
            {
                if (string.IsNullOrEmpty(tifFile) && File.Exists(tifFile))
                {
                    File.Delete(tifFile);
                }
            }
        }

        /// <summary>
        /// 合并
        /// </summary>
        public static string Merge(XYZArgs args, ref string err)
        {
            string txtFile = null;
            try
            {
                List<SysMeta> list = XYZUtils.SelectMetas(args.ids, "and type in ('tif', 'tiff')");
                if (null == list || list.Count == 0) return null;

                txtFile = Path.Combine(Tools.TempDir, ExportUtil.DateStr + ".txt");
                string dirPath = GetTerrainPath(args.dircode);
                if (!Directory.Exists(dirPath)) Directory.CreateDirectory(dirPath);

                string tifFile = Path.Combine(dirPath, args.dircode + ".tif");
                if (File.Exists(tifFile)) File.Delete(tifFile);

                WriteText(txtFile, list);

                string cmd = string.Format("python \"{0}\" -qgz {1} -file \"{2}\" -out \"{3}\"", PyFile, Qgz, txtFile, tifFile);
                err = Tools.ExecCmd(cmd, true);

                return tifFile;
            }
            catch (Exception ex)
            {
                LogOut.Error(ex.Message);
                err = ex.Message;
                return null;
            }
            finally
            {
                if (!string.IsNullOrEmpty(txtFile) && File.Exists(txtFile))
                {
                    File.Delete(txtFile);
                }
            }
        }

        /// <summary>
        /// 写文本文件
        /// </summary>
        private static void WriteText(string txtFile, List<SysMeta> list)
        {
            string uploadFolder = Tools.GetSetting("uploadFolder");

            List<string> files = new List<string>();
            foreach (SysMeta meta in list)
            {
                string filePath = Path.Combine(uploadFolder, meta.path);
                if (File.Exists(filePath)) files.Add(filePath);
            }
            string str = string.Join("\n", files);

            File.WriteAllText(txtFile, str);
        }

        /// <summary>
        /// 生成高程切片
        /// </summary>
        private static void Generate(XYZArgs args, string tifFile, ref string err)
        {
            string dirPath = GetTerrainPath(args.dircode).Replace("\\", "/");
            string name = "ctb_" + ExportUtil.DateStr;

            string runDocker = string.Format("docker run -id --name {0} -v \"{1}\":\"/data\" tumgis/ctb-quantized-mesh", name, dirPath);
            string createMesh = string.Format("docker exec {0} ctb-tile -f Mesh -C -N -s {1} -e {2} -o /data /data/{3}.tif", name, args.max, args.min, args.dircode);
            string createLayer = string.Format("docker exec {0} ctb-tile -f Mesh -C -N -s {1} -e {2} -l -o /data /data/{3}.tif", name, args.max, args.min, args.dircode);
            string stop = string.Format("docker stop {0}", name);
            string rm = string.Format("docker rm {0}", name);

            List<string> list = new List<string> { runDocker, createMesh, createLayer, stop, rm };
            err = Tools.ExecCmd(list);
        }

        /// <summary>
        /// 保存
        /// </summary>
        private static void Save(XYZArgs args)
        {

        }
    }
}