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

namespace ExportMap.cs
{
    public class XYZUtils
    {
        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, "xyz.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/2d/tiles/" + dircode + "/{z}/{x}/{y}.png";
        }

        /// <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)
        {
            List<SysMeta> list = SelectMetas(args.ids, "and type in ('tif', 'tiff', 'img', 'png', 'jpg')");
            if (null == list || list.Count == 0) return null;

            string dateStr = ExportUtil.DateStr;
            //string batFile = Path.Combine(BatPath, dateStr + ".bat");
            string tifFile = Path.Combine(Tools.TempDir, ExportUtil.DateStr + ".txt");
            string xyzPath = Path.Combine(SGUtils.LFData, "2d\\tiles", args.dircode);
            if (!Directory.Exists(xyzPath)) Directory.CreateDirectory(xyzPath);

            WriteText(tifFile, list);

            string cmd = string.Format("python \"{0}\" -qgz {1} -file \"{2}\" -out \"{3}\" -min {4} -max {5} -noData {6}", PyFile, Qgz, tifFile, xyzPath, args.min, args.max, args.noData);

            //err = Tools.ExecCmd(GetCmds(batFile, cmd));            
            err = Tools.ExecCmd(cmd, true);

            //if (File.Exists(batFile)) File.Delete(batFile);
            if (File.Exists(tifFile)) File.Delete(tifFile);

            List<int> ids = new List<int>();
            string viewFile = Path.Combine(xyzPath, "view.html");
            if (File.Exists(viewFile))
            {
                string path = "2d\\tiles" + "\\" + args.dircode;
                int pubid = InsertToDB(list, args, path);

                if (pubid > 0) ids.Add(pubid);
            }

            return ids;
        }

        /// <summary>
        /// 获取命令行
        /// </summary>
        private static List<string> GetCmds(string batFile, string cmd)
        {
            string str = File.ReadAllText(BaseBat) + cmd;
            File.WriteAllText(batFile, str);

            return new List<string>() { "\"" + batFile + "\"" };
        }

        /// <summary>
        /// 查询元数据
        /// </summary>
        public static List<SysMeta> SelectMetas(List<int> ids, string types = "")
        {
            string sql = string.Format("select a.*, fn_get_fullname(dircode, 2) dirname from lf.sys_meta a where id in ({0}) {1} order by id", string.Join(",", ids), types);
            DataTable dt = Tools.DBHelper.GetDataTable(sql);
            List<SysMeta> list = ModelHandler.FillModel<SysMeta>(dt);

            return list;
        }

        /// <summary>
        /// 写文本文件
        /// </summary>
        private static void WriteText(string file, 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);
            }
            //files.Add(@"E:\01.Data\33.DOM\2.大庆DOM\5154.50-415.50.tif");
            //files.Add(@"E:\01.Data\33.DOM\2.大庆DOM\5154.50-416.00.tif");
            string str = string.Join("\n", files);

            File.WriteAllText(file, str);
        }

        /// <summary>
        /// 插入数据库
        /// </summary>
        private static int InsertToDB(List<SysMeta> metas, XYZArgs args, string path)
        {
            if (PubDBHelper.IsPublish(args.dircode)) return 0;

            SysPublish sys = NewPublish(metas[0], args);
            sys.path = path;

            int pubid = PubDBHelper.InsertPublish(sys);
            if (pubid > 0)
            {
                sys.id = pubid;
                PubDBHelper.InsertLayer(sys, new SysMeta()
                {
                    name = args.name,
                    type = metas[0].type,
                    dirname = metas[0].dirname
                });
                foreach (SysMeta meta in metas)
                {
                    PubDBHelper.InsertMetaPub(meta.id, pubid, args.userId);
                }
            }

            return pubid;
        }

        /// <summary>
        /// 创建数据发布类
        /// </summary>
        private static SysPublish NewPublish(SysMeta meta, XYZArgs args)
        {
            SysPublish sp = new SysPublish();
            sp.name = args.name;
            sp.url = GetReleaseUrl(args.dircode);
            sp.type = "DOM";
            sp.status = 3;
            sp.dirid = args.dircode;
            sp.depid = args.depcode;
            sp.min = args.min;
            sp.max = args.max;
            sp.json = null;
            sp.create_user = args.userId;
            sp.geom = GetPointZ(args);
            sp.bak = null;

            return sp;
        }

        /// <summary>
        /// 获取中心点
        /// </summary>
        private static string GetPointZ(XYZArgs args)
        {
            string viewFile = Path.Combine(SGUtils.LFData, "2d\\tiles", args.dircode, "view.html");
            if (!File.Exists(viewFile)) return null;

            string str = File.ReadAllText(viewFile);
            int start = str.IndexOf(".setView([") + ".setView([".Length;
            int end = str.IndexOf(");", start);

            string coords = str.Substring(start, end - start).Replace("]", "").Replace(" ", "");
            string[] strs = coords.Split(new char[] { ',' });

            return string.Format("ST_GeomFromText('POINT Z ({0} {1} {2})')", strs[0], strs[1], strs[2]);
        }
    }
}