using System;
using System.IO;

namespace YLErp.Modules.EodModule
{
    [TestClass]
    public class DividendInfoEditGuardMessageTest
    {
        [TestMethod]
        public void AddDividendInfos_ReportsTheReferencingTradeNumberWhenAnExecutedActionIsEdited()
        {
            var source = ReadDividendServiceSource();
            var addDividendInfos = ExtractMethod(source, "public bool AddDividendInfos", "public bool checkDividendInfoExecuteStatus");
            var controllerSource = ReadExDividendInfoControllerSource();
            var deleteDividend = ExtractMethod(controllerSource, "public JsonResult deleteDividend", "public JsonResult ImportDividendInfo");

            Assert.IsTrue(addDividendInfos.Contains("不可修改，有交易【", StringComparison.Ordinal));
            Assert.IsTrue(addDividendInfos.Contains("使用了该条除权除息数据", StringComparison.Ordinal));
            Assert.IsTrue(deleteDividend.Contains("不可修改，有交易【", StringComparison.Ordinal));
            Assert.IsTrue(deleteDividend.Contains("使用了该条除权除息数据", StringComparison.Ordinal));
        }

        private static string ExtractMethod(string source, string startMarker, string endMarker)
        {
            var start = source.IndexOf(startMarker, StringComparison.Ordinal);
            Assert.IsTrue(start >= 0, $"Could not find method: {startMarker}");
            var end = source.IndexOf(endMarker, start + startMarker.Length, StringComparison.Ordinal);
            Assert.IsTrue(end >= 0, $"Could not find method end: {endMarker}");
            return source.Substring(start, end - start);
        }

        private static string ReadDividendServiceSource()
        {
            return ReadSource("YLErpDAL", "Modules", "TradeModule", "DealModule", "DividendService.cs");
        }

        private static string ReadExDividendInfoControllerSource()
        {
            return ReadSource("YLErpWeb", "Controllers", "ex_dividend_infoController.cs");
        }

        private static string ReadSource(params string[] relativePath)
        {
            var directory = new DirectoryInfo(AppContext.BaseDirectory);
            while (directory != null)
            {
                var path = Path.Combine(new[] { directory.FullName }.Concat(relativePath).ToArray());
                if (File.Exists(path))
                {
                    return File.ReadAllText(path);
                }
                directory = directory.Parent;
            }

            Assert.Fail("Could not locate DividendService.cs from the test output directory.");
            return string.Empty;
        }
    }
}