using MoonExp.Models;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;

namespace MoonExp.cs
{
    public class ExportUtil
    {
        /// <summary>
        /// 最大文件数
        /// </summary>
        public const int MaxFileCount = 2000;

        private static string sourcesPath;

        /// <summary>
        /// 获取资源目录
        /// </summary>
        public static string SourcesPath
        {
            get
            {
                if (string.IsNullOrEmpty(sourcesPath))
                {
                    sourcesPath = Path.Combine(Tools.BaseDir, "Sources");
                }

                return sourcesPath;
            }
        }

        private static string pyFile;

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

                return pyFile;
            }
        }

        /// <summary>
        /// 获取上期字符串
        /// </summary>
        public static string DateStr
        {
            get
            {
                return DateTime.Now.ToString("yyyyMMddHHmmss");
            }
        }

        /// <summary>
        /// 获取下载目录
        /// </summary>
        public static string DownloadFolder
        {
            get
            {
                return ConfigurationManager.AppSettings["downloadFolder"];
            }
        }

        /// <summary>
        /// 后台服务地址
        /// </summary>
        public static string MoonServer
        {
            get
            {
                return ConfigurationManager.AppSettings["moonServer"];
            }
        }

        /// <summary>
        /// 获取出图子目录
        /// </summary>
        public static string GetExportSubFolder()
        {
            string root = DownloadFolder;
            if (!Directory.Exists(root))
            {
                Directory.CreateDirectory(root);
            }

            int i = 1;
            while (true)
            {
                string subFolder = Path.Combine(root, i.ToString());
                if (!Directory.Exists(subFolder))
                {
                    Directory.CreateDirectory(subFolder);
                    break;
                }

                DirectoryInfo dir = new DirectoryInfo(subFolder);
                FileInfo[] files = dir.GetFiles();
                if (files == null || files.Length < MaxFileCount)
                {
                    break;
                }

                i++;
            }

            return i.ToString();
        }

        /// <summary>
        /// 生成
        /// </summary>
        /// <param name="args">出图参数</param>
        /// <param name="err">错误信息</param>
        /// <returns>图片路径</returns>
        public static string Generate(ExportArgs args, ref string err)
        {
            string date = DateStr;
            string sub = GetExportSubFolder();
            string qgz = "Test.qgz";

            args.imgPath = sub + "\\" + date + ".png";
            args.qpt = date + ".qpt";

            args.SetDefault();
            CreateTemplate(args);

            string cmd = string.Format("python \"{0}\" -qgz {1} -qpt {2}", PyFile, qgz, args.qpt);
            err = Tools.ExecCmd(cmd, true, true);

            string qptFile = Path.Combine(SourcesPath, args.qpt);
            if (File.Exists(qptFile)) File.Delete(qptFile);

            string imgPath = Path.Combine(DownloadFolder, args.imgPath);
            bool flag = File.Exists(imgPath);

            return flag ? args.imgPath : null;
        }

        /// <summary>
        /// 转换为XYZ参数
        /// </summary>
        private static XYZArgs ToXYZArgs(ExportArgs ea)
        {
            XYZArgs args = new XYZArgs();
            args.name = ea.title;
            args.ids = new List<int>();
            args.depcode = null;
            args.dircode = null;
            args.userId = Tools.SelectUserIdByToken(ea.token);

            return args;
        }

        /// <summary>
        /// 创建模板
        /// </summary>
        /// <param name="args">出图参数</param>
        public static void CreateTemplate(ExportArgs args)
        {
            string imgPath = Path.Combine(DownloadFolder, args.imgPath);
            string templateFile = Path.Combine(SourcesPath, "Template.qpt");
            string qptFile = Path.Combine(SourcesPath, args.qpt);
            LogOut.Info("imgPath = " + imgPath + ", tempFile = " + templateFile + ", qptFile = " + qptFile);

            string xml = File.ReadAllText(templateFile);
            xml = xml
                .Replace("{dpi}", args.dpi.ToString())
                .Replace("{title}", args.title)
                .Replace("{sourcesPath}", SourcesPath)
                .Replace("{rotation}", args.rotation.ToString())
                .Replace("{xmin}", args.xmin.ToString())
                .Replace("{ymin}", args.ymin.ToString())
                .Replace("{ymax}", args.ymax.ToString())
                .Replace("{xmax}", args.xmax.ToString())
                .Replace("{province}", args.province)
                .Replace("{scale}", args.scale)
                .Replace("{resolution}", args.resolution)
                //.Replace("{date}", args.date)
                .Replace("{date}", DateTime.Now.ToString("yyyy.MM.dd"))
                .Replace("{layers}", args.layers)
                .Replace("{imgPath}", imgPath);

            File.WriteAllText(qptFile, xml);
        }

        /// <summary>
        /// 验证令牌
        /// </summary>
        /// <param name="token">令牌</param>
        /// <returns>是/否有效</returns>
        public static bool VerifyToken(string token)
        {
            try
            {
                string url = MoonServer + "/sign/check?token=" + token.Trim();
                string json = GetData(url);
                if (string.IsNullOrWhiteSpace(json))
                {
                    return false;
                }

                ResponseMsg<bool> rm = JsonConvert.DeserializeObject<ResponseMsg<bool>>(json);

                return rm != null && rm.code == 200 && rm.result;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// Get获取数据
        /// </summary>
        /// <param name="url">URL</param>
        /// <returns>数据</returns>
        public static string GetData(string url)
        {
            Uri uri = new Uri(url);
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
            request.Method = "GET";
            request.ContentType = "application/x-www-form-urlencoded";

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string str = reader.ReadToEnd();
            reader.Close();

            return str;
        }
    }
}