using System;
using System.Reflection;
using ln.json.mapping;
using NUnit.Framework;

namespace ln.json.tests
{
    public class JSONTests
    {

        enum testEnum1 { A, B, C, D, E, F }
        enum testEnum2 : ushort {
            NONE = 0,
            A = 1,
            B = 2,
            C = 4,
            D = 5,
            E = 6
        }
        [Flags]
        enum testEnum3 : ushort {
            NONE = 0,
            A = 1,
            B = 2,
            C = 4,
            D = 5,
            E = 6
        }

        [SetUp]
        public void Setup()
        {
        }

        [Test]
        public void Test_00_Primitives()
        {
            JSONValue jsonFloat = JSONParser.Parse("1234.564");

            Assert.IsTrue(jsonFloat is JSONNumber);
            Assert.AreEqual(1234.564, jsonFloat.ToNative());

            JSONValue jsonInteger = JSONParser.Parse("635462");

            Assert.IsTrue(jsonFloat is JSONNumber);
            Assert.AreEqual(635462, jsonInteger.ToNative());
            

            Assert.Pass();
        }

        [Test]
        public void TestArrayParser()
        {
            JSONParser.Parse("[]");
            JSONParser.Parse("[ ]");
            JSONParser.Parse("[\t]");
        }

        [Test]
        public void TestObjectParser()
        {
            JSONParser.Parse("{}");
            JSONParser.Parse("{ }");
            JSONParser.Parse("{\t}");
        }

        [Test]
        public void TestEnumMappings()
        {
            TestEnumSerialization(testEnum1.A);
            TestEnumSerialization(testEnum1.B);
            TestEnumSerialization(testEnum1.C);
            TestEnumSerialization(testEnum1.D);
            TestEnumSerialization(testEnum1.E);
            TestEnumSerialization(testEnum1.F);

            TestEnumSerialization(testEnum2.NONE);
            TestEnumSerialization(testEnum2.A);
            TestEnumSerialization(testEnum2.B);
            TestEnumSerialization(testEnum2.C);
            TestEnumSerialization(testEnum2.D);
            TestEnumSerialization(testEnum2.E);

            TestEnumSerialization(testEnum3.NONE);
            TestEnumSerialization(testEnum3.A);
            TestEnumSerialization(testEnum3.B);
            TestEnumSerialization(testEnum3.C);
            TestEnumSerialization(testEnum3.D);
            TestEnumSerialization(testEnum3.E);
            TestEnumSerialization((testEnum3)23);
        }

        bool TestEnumSerialization(object enumValue)
        {
            Type enumType = enumValue.GetType();

            Assert.IsTrue(JSONMapper.DefaultMapper.Serialize(enumValue, out JSONValue jsonEnum));
            
            JSONMapper.DefaultMapper.Deserialize(jsonEnum, enumType, out object enunValueDeserialized);

            Assert.AreEqual(enumType, enunValueDeserialized.GetType());
            Assert.AreEqual(enumValue, enunValueDeserialized);

            return true;
        }

        [Test]
        public void TestMapper()
        {
            TestPrimitiveMapping((byte)0x80);
            TestPrimitiveMapping((short)0x80);
            TestPrimitiveMapping((ushort)0x80);
            TestPrimitiveMapping((int)0x80);
            TestPrimitiveMapping((uint)0x80);
            TestPrimitiveMapping((long)0x80);
            TestPrimitiveMapping((ulong)0x80);

            
            TestDeserialization("4", testEnum3.C);
            TestDeserialization("\"C\"", testEnum3.C);
            TestDeserialization("4", testEnum2.C);
            TestDeserialization("\"C\"", testEnum2.C);
            
            TestDeserialization("7", testEnum3.E | testEnum3.A);
            TestDeserialization("\"A,E\"", testEnum3.A | testEnum3.E);            

        }

        [Test]
        public void TestDeserialize()
        {
            Assert.IsTrue(JSONMapper.DefaultMapper.Deserialize("[\"A\",\"B\",\"C\"]", out string[] texts));
            Assert.AreEqual(3, texts.Length);
            Assert.AreEqual("A", texts[0]);
            Assert.AreEqual("B", texts[1]);
            Assert.AreEqual("C", texts[2]);
        }

        [Test]
        public void TestParameterMapping()
        {
            MethodInfo testMethodInfo = GetType().GetMethod("MappingTestMethod");
            object[] methodArguments = null;

            JSONArray jsonArguments = new JSONArray()
                .Add(new JSONString("text parameter value"))
                .Add(new JSONNumber(10))
                .Add(new JSONNumber(-2))
                .Add(new JSONNumber(-3))
                ;

            Assert.IsTrue(JSONMapper.DefaultMapper.MapMethodParameters(testMethodInfo, jsonArguments, out object[] arguments));
            Assert.AreEqual("text parameter value", arguments[0]);
            Assert.AreEqual(10, arguments[1]);
            Assert.AreEqual(-2, arguments[2]);
            Assert.AreEqual(-3, arguments[3]);

            jsonArguments.Remove(3);
            Assert.IsFalse(JSONMapper.DefaultMapper.MapMethodParameters(testMethodInfo, jsonArguments, out arguments));

            JSONObject jsonNamedArguments = new JSONObject()
                .Add("n", new JSONNumber(10))
                .Add("m", new JSONNumber(-2))
                .Add("a", new JSONNumber(-3))
                .Add("t", new JSONString("text parameter value"))
                ;

            Assert.IsTrue(JSONMapper.DefaultMapper.MapMethodParameters(testMethodInfo, jsonNamedArguments, out arguments));
            Assert.AreEqual("text parameter value", arguments[0]);
            Assert.AreEqual(10, arguments[1]);
            Assert.AreEqual(-2, arguments[2]);
            Assert.AreEqual(-3, arguments[3]);

            jsonNamedArguments.Remove("m");
            Assert.IsTrue(JSONMapper.DefaultMapper.MapMethodParameters(testMethodInfo, jsonNamedArguments, out arguments));

            jsonNamedArguments.Remove("a");
            Assert.IsTrue(JSONMapper.DefaultMapper.MapMethodParameters(testMethodInfo, jsonNamedArguments, out arguments));

            jsonNamedArguments.Remove("n");
            Assert.IsFalse(JSONMapper.DefaultMapper.MapMethodParameters(testMethodInfo, jsonNamedArguments, out arguments));
        }

        public void MappingTestMethod(string t, int n, short m = 2, long a = 3)
        {}


        void TestPrimitiveMapping(object primitiveValue)
        {
            Type primitiveType = primitiveValue.GetType();
            Assert.IsTrue(JSONMapper.DefaultMapper.Serialize(primitiveValue, out JSONValue jsonPrimitive));
            JSONMapper.DefaultMapper.Deserialize(jsonPrimitive, primitiveType, out object primitiveValue2);
            Assert.AreEqual(primitiveValue, primitiveValue2);
            Assert.AreEqual(primitiveType, primitiveValue2.GetType());
        }

        void TestDeserialization(string jsonSource, object targetValue)
        {
            Type targetType = targetValue.GetType();
            JSONValue json = JSONParser.Parse(jsonSource);
            Assert.IsTrue(JSONMapper.DefaultMapper.Deserialize(json, targetType, out object value));
            Assert.AreEqual(targetType, value.GetType());
            Assert.AreEqual(targetValue, value);
        }



    }
}