using System;
using System.Net;
using Server.Network;
using Xunit;

namespace Server.Tests.Network.Packets
{
  public class MobilePacketTests : IClassFixture<ServerFixture>
  {
    [Fact]
    public void TestDeathAnimation()
    {
      Serial killed = 0x1;
      Serial corpse = 0x1000;

      Span<byte> data = new DeathAnimation(killed, corpse).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xAF, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial of killed
        0x00, 0x00, 0x00, 0x00, // Serial of corpse
        0x00, 0x00, 0x00, 0x00
      };

      killed.CopyTo(expectedData.Slice(1, 4));
      corpse.CopyTo(expectedData.Slice(5, 4));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestBondStatus()
    {
      Serial petSerial = 0x1;
      bool bonded = true;

      Span<byte> data = new BondedStatus(petSerial, bonded).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xBF, // Packet ID
        0x00, 0x0B, // Length
        0x00, 0x19, // Sub-packet
        0x00, // Sub command
        0x00, 0x00, 0x00, 0x00, // Serial
        (byte)(bonded ? 0x1 : 0x0)
      };

      petSerial.CopyTo(expectedData.Slice(6, 4));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileMoving()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      int noto = 10;

      Span<byte> data = new MobileMoving(m, noto).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0x77, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Body
        0x00, 0x00, // X
        0x00, 0x00, // Y
        0x00, // Z
        0x00, // Direction
        0x00, 0x00, // Hue
        0x00, // Flags
        0x00 // Noto
      };

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      ((ushort)m.Body).CopyTo(expectedData.Slice(5, 2));
      ((ushort)m.X).CopyTo(expectedData.Slice(7, 2));
      ((ushort)m.Y).CopyTo(expectedData.Slice(9, 2));
      expectedData[11] = (byte)m.Z;
      expectedData[12] = (byte)m.Direction;
      ((ushort)m.Hue).CopyTo(expectedData.Slice(13, 2));
      expectedData[15] = (byte)m.GetPacketFlags();
      expectedData[16] = (byte)noto;

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileMovingOld()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      int noto = 10;

      Span<byte> data = new MobileMoving(m, noto).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0x77, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Body
        0x00, 0x00, // X
        0x00, 0x00, // Y
        0x00, // Z
        0x00, // Direction
        0x00, 0x00, // Hue
        0x00, // Flags
        0x00 // Noto
      };

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      ((ushort)m.Body).CopyTo(expectedData.Slice(5, 2));
      ((ushort)m.X).CopyTo(expectedData.Slice(7, 2));
      ((ushort)m.Y).CopyTo(expectedData.Slice(9, 2));
      expectedData[11] = (byte)m.Z;
      expectedData[12] = (byte)m.Direction;
      ((ushort)m.Hue).CopyTo(expectedData.Slice(13, 2));
      expectedData[15] = (byte)m.GetOldPacketFlags();
      expectedData[16] = (byte)noto;

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileHits()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileHits(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xA1, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00 // Current Hits
      };

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Hits, m.HitsMax, false, expectedData.Slice(5));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileHitsN()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileHitsN(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xA1, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00 // Current Hits
      };

      int max = AttributeNormalizer.Maximum;

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Hits, m.HitsMax, true, expectedData.Slice(5));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileMana()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileMana(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xA2, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00 // Current Hits
      };

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Mana, m.ManaMax, false, expectedData.Slice(5));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileManaN()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileManaN(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xA2, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00 // Current Hits
      };

      int max = AttributeNormalizer.Maximum;

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Mana, m.ManaMax, true, expectedData.Slice(5));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileStam()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileStam(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xA3, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00 // Current Hits
      };

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Stam, m.StamMax, false, expectedData.Slice(5));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileStamN()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileStamN(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0xA3, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00 // Current Hits
      };

      int max = AttributeNormalizer.Maximum;

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Stam, m.StamMax, true, expectedData.Slice(5));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileAttributes()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileAttributes(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0x2D, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00, // Current Hits
        0x00, 0x00, // Max Mana
        0x00, 0x00, // Current Mana
        0x00, 0x00, // Max Stam
        0x00, 0x00 // Current Stam
      };

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Hits, m.HitsMax, false, expectedData.Slice(5));
      AttributeNormalizerUtilities.Write(m.Mana, m.ManaMax, false, expectedData.Slice(9));
      AttributeNormalizerUtilities.Write(m.Stam, m.StamMax, false, expectedData.Slice(13));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileAttributesN()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      Span<byte> data = new MobileAttributesN(m).Compile();

      Span<byte> expectedData = stackalloc byte[]
      {
        0x2D, // Packet ID
        0x00, 0x00, 0x00, 0x00, // Serial
        0x00, 0x00, // Max Hits
        0x00, 0x00, // Current Hits
        0x00, 0x00, // Max Mana
        0x00, 0x00, // Current Mana
        0x00, 0x00, // Max Stam
        0x00, 0x00 // Current Stam
      };

      int max = AttributeNormalizer.Maximum;

      m.Serial.CopyTo(expectedData.Slice(1, 4));
      AttributeNormalizerUtilities.Write(m.Hits, m.HitsMax, true, expectedData.Slice(5));
      AttributeNormalizerUtilities.Write(m.Mana, m.ManaMax, true, expectedData.Slice(9));
      AttributeNormalizerUtilities.Write(m.Stam, m.StamMax, true, expectedData.Slice(13));

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileName()
    {
      var m = new Mobile(0x1)
      {
        Name = "Some Really Long Mobile Name That Gets Cut off",
      };
      m.DefaultMobileInit();

      Span<byte> data = new MobileName(m).Compile();

      Span<byte> expectedData = stackalloc byte[37];
      int pos = 0;
      ((byte)0x98).CopyTo(ref pos, expectedData);
      ((ushort)0x25).CopyTo(ref pos, expectedData);
      m.Serial.CopyTo(ref pos, expectedData);
      (m.Name ?? "").CopyRawASCIITo(ref pos, 29, expectedData);
      ((byte)0x0).CopyTo(ref pos, expectedData); // Null terminator

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileAnimation()
    {
      Serial mobile = 0x1;
      int action = 200;
      int frameCount = 5;
      int repeatCount = 1;
      bool reverse = false;
      bool repeat = false;
      byte delay = 5;

      Span<byte> data = new MobileAnimation(
        mobile,
        action,
        frameCount,
        repeatCount,
        !reverse,
        repeat,
        delay
      ).Compile();

      Span<byte> expectedData = stackalloc byte[14];
      int pos = 0;

      ((byte)0x6E).CopyTo(ref pos, expectedData);
      mobile.CopyTo(ref pos, expectedData);
      ((ushort)action).CopyTo(ref pos, expectedData);
      ((ushort)frameCount).CopyTo(ref pos, expectedData);
      ((ushort)repeatCount).CopyTo(ref pos, expectedData);
      reverse.CopyTo(ref pos, expectedData);
      repeat.CopyTo(ref pos, expectedData);
      delay.CopyTo(ref pos, expectedData);

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestNewMobileAnimation()
    {
      Serial mobile = 0x1;
      int action = 200;
      int frameCount = 5;
      byte delay = 5;

      Span<byte> data = new NewMobileAnimation(
        mobile,
        action,
        frameCount,
        delay
      ).Compile();

      Span<byte> expectedData = stackalloc byte[10];
      int pos = 0;

      ((byte)0xE2).CopyTo(ref pos, expectedData);
      mobile.CopyTo(ref pos, expectedData);
      ((ushort)action).CopyTo(ref pos, expectedData);
      ((ushort)frameCount).CopyTo(ref pos, expectedData);
      delay.CopyTo(ref pos, expectedData);

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileStatusCompact()
    {
      var m = new Mobile(0x1);
      m.DefaultMobileInit();

      bool canBeRenamed = false;

      Span<byte> data = new MobileStatusCompact(canBeRenamed, m).Compile();

      Span<byte> expectedData = stackalloc byte[43];
      int pos = 0;

      ((byte)0x11).CopyTo(ref pos, expectedData); // Packet ID
      ((ushort)expectedData.Length).CopyTo(ref pos, expectedData); // Length

      m.Serial.CopyTo(ref pos, expectedData);
      (m.Name ?? "").CopyASCIIFixedTo(ref pos, 30, expectedData);

      AttributeNormalizerUtilities.WriteReverse(m.Hits, m.HitsMax, true, expectedData.Slice(pos));
      pos += 4;
      canBeRenamed.CopyTo(ref pos, expectedData);

      AssertThat.Equal(data, expectedData);
    }

    [Fact]
    public void TestMobileStatusExtended()
    {
      var beholder = new Mobile(0x1)
      {
        Name = "Random Mobile 1"
      };
      beholder.DefaultMobileInit();

      var beheld = new Mobile(0x2)
      {
        Name = "Random Mobile 2"
      };
      beheld.DefaultMobileInit();

      NetState ns = new NetState(new AccountPacketTests.TestConnectionContext
      {
        RemoteEndPoint = IPEndPoint.Parse("127.0.0.1")
      });

      Span<byte> data = new MobileStatus(beholder, beheld, ns).Compile();

      Span<byte> expectedData = stackalloc byte[121]; // Max Size
      int pos = 0;

      ((byte)0x11).CopyTo(ref pos, expectedData);
      pos += 2; // Length

      int type;
      bool notSelf = beholder != beheld;

      if (notSelf) type = 0;
      else if (Core.HS && ns.ExtendedStatus) type = 6;
      else if (Core.ML && ns.SupportsExpansion(Expansion.ML)) type = 5;
      else type = Core.AOS ? 4 : 3;

      beheld.Serial.CopyTo(ref pos, expectedData);
      beheld.Name.CopyASCIIFixedTo(ref pos, 30, expectedData);

      AttributeNormalizerUtilities.WriteReverse(beheld.Hits, beheld.HitsMax, notSelf, expectedData.Slice(pos));
      pos += 4;

      beheld.CanBeRenamedBy(beheld).CopyTo(ref pos, expectedData);
      ((byte)type).CopyTo(ref pos, expectedData);

      if (type > 0)
      {
        beheld.Female.CopyTo(ref pos, expectedData);
        ((ushort)beheld.Str).CopyTo(ref pos, expectedData);
        ((ushort)beheld.Dex).CopyTo(ref pos, expectedData);
        ((ushort)beheld.Int).CopyTo(ref pos, expectedData);

        AttributeNormalizerUtilities.WriteReverse(beheld.Stam, beheld.StamMax, notSelf, expectedData.Slice(pos));
        pos += 4;

        AttributeNormalizerUtilities.WriteReverse(beheld.Mana, beheld.ManaMax, notSelf, expectedData.Slice(pos));
        pos += 4;

        beheld.TotalGold.CopyTo(ref pos, expectedData);
        ((ushort)(Core.AOS ? beheld.PhysicalResistance : (int)(beheld.ArmorRating + 0.5))).CopyTo(ref pos, expectedData);
        ((ushort)(Mobile.BodyWeight + beheld.TotalWeight)).CopyTo(ref pos, expectedData);

        if (type >= 5)
        {
          ((ushort)beheld.MaxWeight).CopyTo(ref pos, expectedData);
          ((byte)(beheld.Race.RaceID + 1)).CopyTo(ref pos, expectedData); // 0x00 for a non-ML enabled account
        }

        ((ushort)beheld.StatCap).CopyTo(ref pos, expectedData);
        ((byte)beheld.Followers).CopyTo(ref pos, expectedData);
        ((byte)beheld.FollowersMax).CopyTo(ref pos, expectedData);

        if (type >= 4)
        {
          ((ushort)beheld.FireResistance).CopyTo(ref pos, expectedData);
          ((ushort)beheld.ColdResistance).CopyTo(ref pos, expectedData);
          ((ushort)beheld.PoisonResistance).CopyTo(ref pos, expectedData);
          ((ushort)beheld.EnergyResistance).CopyTo(ref pos, expectedData);
          ((ushort)beheld.Luck).CopyTo(ref pos, expectedData);
        }

        int min = 0;
        int max = 0;
        beheld.Weapon?.GetStatusDamage(beheld, out min, out max);

        ((ushort)min).CopyTo(ref pos, expectedData);
        ((ushort)max).CopyTo(ref pos, expectedData);

        beheld.TithingPoints.CopyTo(ref pos, expectedData);

        if (type >= 6)
          for (var i = 0; i < 15; ++i)
            ((ushort)beheld.GetAOSStatus(i)).CopyTo(ref pos, expectedData);
      }

      ((ushort)pos).CopyTo(expectedData.Slice(1)); // Length

      expectedData = expectedData.Slice(0, pos);
      AssertThat.Equal(data, expectedData);
    }
  }
}