using UnityEngine;
using System;
using System.IO;
using NUnit.Framework;
using UnityEditor;
using UnityEditor.SettingsManagement;
using UnityEngine.TestTools;

namespace UnityEngine.SettingsManagement.EditorTests
{
	class SettingsTests : IPrebuildSetup, IPostBuildCleanup
	{
		const string k_PackageName = "com.unity.settings-manager";
		const string k_SettingsFile = "SettingsTests";

		static Settings s_Settings;

		static string projectSettingsPath
		{
			get { return PackageSettingsRepository.GetSettingsPath(k_PackageName, k_SettingsFile); }
		}

		static Settings settings
		{
			get
			{
				if (s_Settings == null)
					s_Settings = new Settings(k_PackageName);
				return s_Settings;
			}
		}

		public void Setup()
		{
		}

		public void Cleanup()
		{
			foreach (var v in s_AllPreferences)
				v.Delete();

			if (File.Exists(projectSettingsPath))
				File.Delete(projectSettingsPath);
		}

		[Serializable]
		struct DummyStruct : IEquatable<DummyStruct>
		{
			public string stringValue;
			public int intValue;

			public DummyStruct(string s, int i)
			{
				stringValue = s;
				intValue = i;
			}

			public static DummyStruct defaultValue
			{
				get { return new DummyStruct("I'm a string!", 42); }
			}

			public bool Equals(DummyStruct other)
			{
				return string.Equals(stringValue, other.stringValue) && intValue == other.intValue;
			}

			public override bool Equals(object obj)
			{
				if (ReferenceEquals(null, obj))
					return false;
				return obj is DummyStruct && Equals((DummyStruct)obj);
			}

			public override int GetHashCode()
			{
				unchecked
				{
					return ((stringValue != null ? stringValue.GetHashCode() : 0) * 397) ^ intValue;
				}
			}

			public static bool operator ==(DummyStruct left, DummyStruct right)
			{
				return left.Equals(right);
			}

			public static bool operator !=(DummyStruct left, DummyStruct right)
			{
				return !left.Equals(right);
			}

			public override string ToString()
			{
				return stringValue + "  " + intValue;
			}
		}

		[Serializable]
		class DummyClass : IEquatable<DummyClass>
		{
			public string stringValue;
			public int intValue;

			public DummyClass(string s, int i)
			{
				stringValue = s;
				intValue = i;
			}

			public static DummyClass defaultValue
			{
				get { return new DummyClass("I'm a string!", 42); }
			}

			public bool Equals(DummyClass other)
			{
				return string.Equals(stringValue, other.stringValue) && intValue == other.intValue;
			}

			public override bool Equals(object obj)
			{
				if (ReferenceEquals(null, obj))
					return false;
				return obj is DummyClass && Equals((DummyClass)obj);
			}

			public override int GetHashCode()
			{
				unchecked
				{
					return ((stringValue != null ? stringValue.GetHashCode() : 0) * 397) ^ intValue;
				}
			}

			public static bool operator ==(DummyClass left, DummyClass right)
			{
				return left.Equals(right);
			}

			public static bool operator !=(DummyClass left, DummyClass right)
			{
				return !left.Equals(right);
			}

			public override string ToString()
			{
				return stringValue + "  " + intValue;
			}
		}

		static UserSetting<bool> s_StaticBoolUser = new UserSetting<bool>(settings, "tests.user.static.bool", true, SettingsScope.User);
		static UserSetting<bool> s_StaticBoolProject = new UserSetting<bool>(settings, "tests.project.static.bool", true, SettingsScope.Project);

		static UserSetting<string> s_StaticStringUser = new UserSetting<string>(settings, "tests.user.static.string", "Hello, world!", SettingsScope.User);
		static UserSetting<string> s_StaticStringProject = new UserSetting<string>(settings, "tests.project.static.string", "Goodbye, world!", SettingsScope.Project);

		static UserSetting<DummyStruct> s_StaticStructUser = new UserSetting<DummyStruct>(settings, "tests.user.static.struct", DummyStruct.defaultValue, SettingsScope.User);
		static UserSetting<DummyStruct> s_StaticStructProject = new UserSetting<DummyStruct>(settings, "tests.project.static.struct", DummyStruct.defaultValue, SettingsScope.Project);

		static UserSetting<DummyClass> s_StaticClassUser = new UserSetting<DummyClass>(settings, "tests.user.static.class", DummyClass.defaultValue, SettingsScope.User);
		static UserSetting<DummyClass> s_StaticClassProject = new UserSetting<DummyClass>(settings, "tests.project.static.class", DummyClass.defaultValue, SettingsScope.Project);

		static IUserSetting[] s_AllPreferences = new IUserSetting[]
		{
			s_StaticBoolUser,
			s_StaticBoolProject,
			s_StaticStringUser,
			s_StaticStringProject,
			s_StaticStructUser,
			s_StaticStructProject,
			s_StaticClassUser,
			s_StaticClassProject
		};

		[Test]
		public static void DefaultsAreCorrect()
		{
			try
			{
				foreach (var pref in s_AllPreferences)
					pref.Reset();

				Assert.IsTrue((bool)s_StaticBoolUser, s_StaticBoolUser.ToString());
				Assert.IsTrue((bool)s_StaticBoolProject, s_StaticBoolProject.ToString());

				Assert.AreEqual("Hello, world!", (string)s_StaticStringUser, s_StaticStringUser.ToString());
				Assert.AreEqual("Goodbye, world!", (string)s_StaticStringProject, s_StaticStringProject.ToString());

				Assert.AreEqual(DummyStruct.defaultValue, (DummyStruct)s_StaticStructUser, s_StaticStructUser.ToString());
				Assert.AreEqual(DummyStruct.defaultValue, (DummyStruct)s_StaticStructProject, s_StaticStructProject.ToString());

				Assert.AreEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassUser, s_StaticClassUser.ToString());
				Assert.AreEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassProject, s_StaticClassProject.ToString());
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void SetValue()
		{
			try
			{
				// BOOl
				s_StaticBoolUser.value = false;
				s_StaticBoolProject.value = false;

				Assert.IsFalse((bool)s_StaticBoolUser);
				Assert.IsFalse((bool)s_StaticBoolProject);

				// STRING
				s_StaticStringUser.value = "Some more text";
				s_StaticStringProject.value = "Some text here";

				Assert.AreEqual("Some more text", (string)s_StaticStringUser);
				Assert.AreEqual("Some text here", (string)s_StaticStringProject);

				// STRUCT
				var userStruct = new DummyStruct("Changed text", 23);
				var projectStruct = new DummyStruct("Slightly different text", -9825);

				s_StaticStructUser.SetValue(userStruct);
				s_StaticStructProject.SetValue(projectStruct);

				Assert.AreEqual(userStruct, (DummyStruct)s_StaticStructUser);
				Assert.AreEqual(projectStruct, (DummyStruct)s_StaticStructProject);

				// CLASS
				var userClass = new DummyClass("Changed text", 23);
				var projectClass = new DummyClass("Slightly different text", -9825);

				s_StaticClassUser.SetValue(userClass);
				s_StaticClassProject.SetValue(projectClass);

				Assert.AreEqual(userClass, (DummyClass)s_StaticClassUser);
				Assert.AreEqual(projectClass, (DummyClass)s_StaticClassProject);
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void SetAndReset()
		{
			try
			{
				// BOOL
				s_StaticBoolUser.value = false;
				s_StaticBoolProject.value = false;

				// STRING
				s_StaticStringUser.value = "Some more text";
				s_StaticStringProject.value = "Some text here";

				// STRUCT
				s_StaticStructUser.SetValue(new DummyStruct("Changed text", 23));
				s_StaticStructProject.SetValue(new DummyStruct("Slightly different text", -9825));

				// CLASS
				s_StaticClassUser.SetValue(new DummyClass("Changed text", 23));
				s_StaticClassProject.SetValue(new DummyClass("Slightly different text", -9825));

				Assert.IsFalse((bool)s_StaticBoolUser);
				Assert.IsFalse((bool)s_StaticBoolProject);

				Assert.AreNotEqual("Hello, world!", (string)s_StaticStringUser);
				Assert.AreNotEqual("Goodbye, world!", (string)s_StaticStringProject);

				Assert.AreNotEqual(DummyStruct.defaultValue, (DummyStruct)s_StaticStructUser);
				Assert.AreNotEqual(DummyStruct.defaultValue, (DummyStruct)s_StaticStructProject);

				Assert.AreNotEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassUser);
				Assert.AreNotEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassProject);

				foreach (var pref in s_AllPreferences)
					pref.Reset();

				Assert.IsTrue((bool)s_StaticBoolUser);
				Assert.IsTrue((bool)s_StaticBoolProject);

				Assert.AreEqual("Hello, world!", (string)s_StaticStringUser);
				Assert.AreEqual("Goodbye, world!", (string)s_StaticStringProject);

				Assert.AreEqual(DummyStruct.defaultValue, (DummyStruct)s_StaticStructUser);
				Assert.AreEqual(DummyStruct.defaultValue, (DummyStruct)s_StaticStructProject);

				Assert.AreEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassUser);
				Assert.AreEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassProject);
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void SerializeAndLoad()
		{
			try
			{
				foreach (var pref in s_AllPreferences)
					pref.Reset();
				settings.Save();

				var instance = new Settings(k_PackageName);

				Assert.AreEqual((bool)s_StaticBoolUser, instance.Get<bool>(s_StaticBoolUser.key, s_StaticBoolUser.scope));
				Assert.AreEqual((bool)s_StaticBoolProject, instance.Get<bool>(s_StaticBoolProject.key, s_StaticBoolProject.scope));
				Assert.AreEqual((string)s_StaticStringUser, instance.Get<string>(s_StaticStringUser.key, s_StaticStringUser.scope));
				Assert.AreEqual((string)s_StaticStringProject, instance.Get<string>(s_StaticStringProject.key, s_StaticStringProject.scope));
				Assert.AreEqual((DummyStruct)s_StaticStructUser, instance.Get<DummyStruct>(s_StaticStructUser.key, s_StaticStructUser.scope));
				Assert.AreEqual((DummyStruct)s_StaticStructProject, instance.Get<DummyStruct>(s_StaticStructProject.key, s_StaticStructProject.scope));
				Assert.AreEqual((DummyClass)s_StaticClassUser, instance.Get<DummyClass>(s_StaticClassUser.key, s_StaticClassUser.scope));
				Assert.AreEqual((DummyClass)s_StaticClassProject, instance.Get<DummyClass>(s_StaticClassProject.key, s_StaticClassProject.scope));
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void DeleteKeys()
		{
			try
			{
				foreach (var pref in s_AllPreferences)
					pref.Delete();

				settings.Save();

				var instance = new Settings(k_PackageName);

				Assert.IsFalse(instance.ContainsKey<bool>("tests.user.static.bool", SettingsScope.User), "tests.user.static.bool");
				Assert.IsFalse(instance.ContainsKey<bool>("tests.project.static.bool", SettingsScope.Project), "tests.project.static.bool");
				Assert.IsFalse(instance.ContainsKey<string>("tests.user.static.string", SettingsScope.User), "tests.user.static.string");
				Assert.IsFalse(instance.ContainsKey<string>("tests.project.static.string", SettingsScope.Project), "tests.project.static.string");
				Assert.IsFalse(instance.ContainsKey<DummyStruct>("tests.user.static.struct", SettingsScope.User), "tests.user.static.struct");
				Assert.IsFalse(instance.ContainsKey<DummyStruct>("tests.project.static.struct", SettingsScope.Project), "tests.project.static.struct");
				Assert.IsFalse(instance.ContainsKey<DummyClass>("tests.user.static.class", SettingsScope.User), "tests.user.static.class");
				Assert.IsFalse(instance.ContainsKey<DummyClass>("tests.project.static.class", SettingsScope.Project), "tests.project.static.class");
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void KeysExistInSettingsInstance()
		{
			try
			{
				foreach (var pref in s_AllPreferences)
					pref.Reset();

				settings.Save();

				Assert.IsTrue(settings.ContainsKey<bool>("tests.user.static.bool", SettingsScope.User), "tests.user.static.bool");
				Assert.IsTrue(settings.ContainsKey<bool>("tests.project.static.bool", SettingsScope.Project), "tests.project.static.bool");
				Assert.IsTrue(settings.ContainsKey<string>("tests.user.static.string", SettingsScope.User), "tests.user.static.string");
				Assert.IsTrue(settings.ContainsKey<string>("tests.project.static.string", SettingsScope.Project), "tests.project.static.string");
				Assert.IsTrue(settings.ContainsKey<DummyStruct>("tests.user.static.struct", SettingsScope.User), "tests.user.static.struct");
				Assert.IsTrue(settings.ContainsKey<DummyStruct>("tests.project.static.struct", SettingsScope.Project), "tests.project.static.struct");
				Assert.IsTrue(settings.ContainsKey<DummyClass>("tests.user.static.class", SettingsScope.User), "tests.user.static.class");
				Assert.IsTrue(settings.ContainsKey<DummyClass>("tests.project.static.class", SettingsScope.Project), "tests.project.static.class");
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void KeysExistInSerializedForm()
		{
			try
			{
				foreach (var pref in s_AllPreferences)
					pref.Reset();

				settings.Save();

				var instance = new Settings(k_PackageName);

				Assert.IsTrue(instance.ContainsKey<bool>("tests.user.static.bool", SettingsScope.User), "tests.user.static.bool");
				Assert.IsTrue(instance.ContainsKey<bool>("tests.project.static.bool", SettingsScope.Project), "tests.project.static.bool");
				Assert.IsTrue(instance.ContainsKey<string>("tests.user.static.string", SettingsScope.User), "tests.user.static.string");
				Assert.IsTrue(instance.ContainsKey<string>("tests.project.static.string", SettingsScope.Project), "tests.project.static.string");
				Assert.IsTrue(instance.ContainsKey<DummyStruct>("tests.user.static.struct", SettingsScope.User), "tests.user.static.struct");
				Assert.IsTrue(instance.ContainsKey<DummyStruct>("tests.project.static.struct", SettingsScope.Project), "tests.project.static.struct");
				Assert.IsTrue(instance.ContainsKey<DummyClass>("tests.user.static.class", SettingsScope.User), "tests.user.static.class");
				Assert.IsTrue(instance.ContainsKey<DummyClass>("tests.project.static.class", SettingsScope.Project), "tests.project.static.class");
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}

		[Test]
		public static void ChangingClassValuesSaves()
		{
			try
			{
				s_StaticClassUser.Reset();
				s_StaticClassProject.Reset();

				Assert.AreEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassUser);
				Assert.AreEqual(DummyClass.defaultValue, (DummyClass)s_StaticClassProject);

				var userReference = s_StaticClassUser.value;
				var projectReference = s_StaticClassProject.value;

				userReference.intValue = 200;
				projectReference.intValue = 200;

				s_StaticClassProject.ApplyModifiedProperties();
				s_StaticClassUser.ApplyModifiedProperties();

				Assert.IsTrue(ReferenceEquals(s_StaticClassProject.value, projectReference));
				Assert.IsTrue(ReferenceEquals(s_StaticClassUser.value, userReference));

				Assert.AreEqual(200, s_StaticClassUser.value.intValue, "After ApplyModifiedProperties");
				Assert.AreEqual(200, s_StaticClassProject.value.intValue, "After ApplyModifiedProperties");

				settings.Save();

				var instance = new Settings(k_PackageName);

				Assert.AreEqual(200, instance.Get<DummyClass>(s_StaticClassUser.key, s_StaticClassUser.scope).intValue, "Reload Settings Instance");
				Assert.AreEqual(200, instance.Get<DummyClass>(s_StaticClassProject.key, s_StaticClassProject.scope).intValue, "Reload Settings Instance");
			}
			catch (Exception e)
			{
				Debug.LogError(e.ToString());
			}
		}
	}
}
