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 OsgbUtils
    {
        /// <summary>
        /// 获取路径
        /// </summary>
        public static string GetPath(int id)
        {
            return Path.Combine(SGUtils.LFData, "3d\\3dtiles\\osgb", id.ToString());
        }

        /// <summary>
        /// 获取发布地址
        /// </summary>
        public static string GetReleaseUrl(SysMeta meta)
        {
            return "{host}/LFData/3d/3dtiles/osgb/" + meta.id + "/tileset.json";
        }

        /// <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 = 'osgb'");
                if (null == list || list.Count == 0) return null;

                string d3tilesPath = Tools.GetSetting("d3tilesPath");
                string uploadFolder = Tools.GetSetting("uploadFolder");

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

                    meta.ismeta = 0; // 0-倾斜摄影数据
                    string outPath = GetPath(meta.id);
                    string jsonFile = Path.Combine(outPath, "tileset.json");

                    if (args.isNew && Directory.Exists(outPath)) Tools.DelPath(outPath);
                    if (!Directory.Exists(outPath)) Directory.CreateDirectory(outPath);
                    if (File.Exists(jsonFile)) File.Delete(jsonFile);

                    string srs = findSRS(osgbPath);
                    if (null != srs) writeSRS(osgbPath, getSRS(srs));

                    int idx = args.ids.IndexOf(meta.id);
                    string cmd = string.Format("{0}\\3dtile.exe -f osgb -i \"{1}\" -o \"{2}\" -c \"{{\\\"offset\\\": {3}}}\"", d3tilesPath, osgbPath, outPath, args.zs[idx]);
                    SysTask task = TaskDBHelper.CreateTask(args, meta, "OSGB", "倾斜数据(OSGB)");
                    err = Tools.ExecCmd(task, cmd, false);
                    err = null;

                    if (null != srs) writeSRS(osgbPath, srs);
                    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>
        /// 查找SRS
        /// </summary>
        private static string findSRS(string osgbPath)
        {
            string file = Path.Combine(osgbPath, "metadata.xml");
            if (!File.Exists(file)) return null;

            string[] lines = File.ReadAllLines(file);
            foreach (string line in lines)
            {
                if (line.Contains("<SRS>EPSG:") && line.Contains("+"))
                {
                    return line;
                }
            }

            return null;
        }

        /// <summary>
        /// 写入SRS
        /// </summary>
        private static void writeSRS(string osgbPath, string newSRS)
        {
            string file = Path.Combine(osgbPath, "metadata.xml");
            if (!File.Exists(file)) return;

            string[] lines = File.ReadAllLines(file);
            for (int i = 0, c = lines.Length; i < c; i++)
            {
                if (lines[i].Contains("<SRS>EPSG:"))
                {
                    lines[i] = newSRS;
                    break;
                }
            }

            File.WriteAllLines(file, lines);
        }

        /// <summary>
        /// 获取SRS
        /// </summary>
        /// <param name="srs"></param>
        private static string getSRS(string srs)
        {
            int start = srs.IndexOf("+");
            int end = srs.IndexOf("</SRS>");
            string other = srs.Substring(start, end - start);

            return srs.Replace(other, "");
        }

        /// <summary>
        /// 插入数据库
        /// </summary>
        private static int InsertToDB(SysMeta meta, XYZArgs args, string path)
        {
            //if (PubDBHelper.IsPublish(meta.id)) return 1;
            int pubid = PubDBHelper.GetPushlishId(meta.id);
            if (pubid > 0)
            {
                PubDBHelper.UpdatePublish(pubid, meta.name, args.userId, null);
                return pubid;
            }

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

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

            return pubid;
        }
    }
}