using System;
using System.Collections.Generic;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Web;

namespace LFServer.cs
{
    public static class ExportUtil
    {
        /// <summary>
        /// 基目录
        /// </summary>
        public static readonly string BaseDir = AppDomain.CurrentDomain.BaseDirectory;

        /// <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(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>
        /// 获取出图目录
        /// </summary>
        public static string ExportFolder
        {
            get
            {
                return ConfigurationManager.AppSettings["exportFolder"];
            }
        }

        /// <summary>
        /// 获取出图子目录
        /// </summary>
        public static string GetExportSubFolder()
        {
            string root = ExportFolder;
            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>
        /// 执行Python
        /// </summary>
        /// <param name="py">Python文件</param>
        /// <param name="qgz">QGIS工程</param>
        /// <param name="qpt">QGIS模板</param>
        public static void ExecPython(string py, string qgz, string qpt)
        {
            try
            {
                string args = string.Format("{0} -qgz {1} -qpt {2}", py, qgz, qpt);

                Process p = new Process();
                p.StartInfo.UseShellExecute = false;
                p.StartInfo.ErrorDialog = true;
                p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                p.StartInfo.RedirectStandardError = false;
                p.StartInfo.FileName = "python";
                p.StartInfo.Arguments = args;
                p.StartInfo.CreateNoWindow = true;

                p.Start();
            }
            catch
            {
            }
        }

        public static void Generate()
        {
            string date = DateStr;


        }
    }
}