using System.IO;
using Xunit;
using XWorld.Server.Host;

namespace XWorld.Server.Host.Tests
{
    public class GameManifestTests
    {
        private const string Valid = @"{
            ""gameId"": ""rps"",
            ""version"": 2,
            ""serverAssembly"": ""RPS.Server.dll"",
            ""serverEntryType"": ""RPS.Server.RpsServerRoom"",
            ""minFrameworkVersion"": 1,
            ""playerCount"": 2,
            ""tickRateHz"": 10
        }";

        [Fact]
        public void Parse_Valid_ReadsAllFields()
        {
            var m = GameManifest.Parse(Valid);
            Assert.Equal("rps", m.GameId);
            Assert.Equal(2, m.Version);
            Assert.Equal("RPS.Server.dll", m.ServerAssembly);
            Assert.Equal("RPS.Server.RpsServerRoom", m.ServerEntryType);
            Assert.Equal(1, m.MinFrameworkVersion);
            Assert.Equal(2, m.PlayerCount);
            Assert.Equal(10, m.TickRateHz);
        }

        [Fact]
        public void Parse_CaseInsensitive_FieldNames()
        {
            var m = GameManifest.Parse(@"{""GameId"":""x"",""Version"":1,""ServerAssembly"":""X.dll"",""ServerEntryType"":""X.Y""}");
            Assert.Equal("x", m.GameId);
            Assert.Equal(1, m.Version);
        }

        [Theory]
        [InlineData(@"{""version"":1,""serverEntryType"":""a"",""serverAssembly"":""a.dll""}")] // 缺 gameId
        [InlineData(@"{""gameId"":""x"",""version"":1,""serverAssembly"":""a.dll""}")]            // 缺 entryType
        [InlineData(@"{""gameId"":""x"",""version"":0,""serverEntryType"":""a"",""serverAssembly"":""a.dll""}")] // version 非正
        [InlineData(@"{""gameId"":""x"",""version"":1,""serverEntryType"":""a""}")]                 // 缺 serverAssembly
        public void Parse_Invalid_Throws(string json)
        {
            Assert.Throws<InvalidDataException>(() => GameManifest.Parse(json));
        }
    }
}