using Microsoft.ClearScript;
using Microsoft.ClearScript.V8;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace Turf.cs
{
    public class Tools
    {
        public Tools() { }

        private V8Script v8Script;

        public static readonly string BaseDir = AppDomain.CurrentDomain.BaseDirectory;

        private static string js;

        public string TurfJS
        {
            get
            {
                if (null == js)
                {
                    string jsFile = Path.Combine(BaseDir, "js\\turf.min.6.5.js");
                    if (File.Exists(jsFile))
                    {
                        js = File.ReadAllText(jsFile);
                    }
                }

                return js;
            }
        }

        public double CalcArea(string code)
        {
            try
            {
                using (V8ScriptEngine engine = new V8ScriptEngine())
                {
                    engine.DocumentSettings.AccessFlags = DocumentAccessFlags.EnableFileLoading;
                    engine.DefaultAccess = ScriptAccess.Full;

                    string jsFile = Path.Combine(BaseDir, "js\\turf.min.6.5.js");
                    V8Script script = engine.CompileDocument(jsFile);
                    engine.Execute(script);

                    string cs = "[113.23063216099904,31.21983148200005,113.23061312499972,31.219450768000044,113.23060360699967,31.21910812599997,113.2305679149997,31.218752397000046,113.23055006899986,31.21841570199999,113.230526275,31.218007625000023,113.23050485999988,31.217670932000015,113.23047154600006,31.21738182700004]";

                    object obj = engine.Invoke("pointsToPolygon", cs);

                    return null == obj ? 0 : Convert.ToDouble(obj);
                }
            }
            catch (Exception ex)
            {
                //
            }
            return 0;
        }
    }
}