using System.Linq;
using Content.Shared.Humanoid.Markings;
using Content.Shared.Humanoid.Prototypes;
using Robust.Shared.Prototypes;
using Robust.Shared.Random;
using Robust.Shared.Serialization;

namespace Content.Shared.Humanoid;

[DataDefinition]
[Serializable, NetSerializable]
public sealed partial class HumanoidCharacterAppearance : ICharacterAppearance
{
    public HumanoidCharacterAppearance(string hairStyleId,
        Color hairColor,
        string facialHairStyleId,
        Color facialHairColor,
        Color eyeColor,
        Color skinColor,
        List<Marking> markings)
    {
        HairStyleId = hairStyleId;
        HairColor = ClampColor(hairColor);
        FacialHairStyleId = facialHairStyleId;
        FacialHairColor = ClampColor(facialHairColor);
        EyeColor = ClampColor(eyeColor);
        SkinColor = ClampColor(skinColor);
        Markings = markings;
    }

    [DataField("hair")]
    public string HairStyleId { get; private set; }

    [DataField("hairColor")]
    public Color HairColor { get; private set; }

    [DataField("facialHair")]
    public string FacialHairStyleId { get; private set; }

    [DataField("facialHairColor")]
    public Color FacialHairColor { get; private set; }

    [DataField("eyeColor")]
    public Color EyeColor { get; private set; }

    [DataField("skinColor")]
    public Color SkinColor { get; private set; }

    [DataField("markings")]
    public List<Marking> Markings { get; private set; }

    public HumanoidCharacterAppearance WithHairStyleName(string newName)
    {
        return new(newName, HairColor, FacialHairStyleId, FacialHairColor, EyeColor, SkinColor, Markings);
    }

    public HumanoidCharacterAppearance WithHairColor(Color newColor)
    {
        return new(HairStyleId, newColor, FacialHairStyleId, FacialHairColor, EyeColor, SkinColor, Markings);
    }

    public HumanoidCharacterAppearance WithFacialHairStyleName(string newName)
    {
        return new(HairStyleId, HairColor, newName, FacialHairColor, EyeColor, SkinColor, Markings);
    }

    public HumanoidCharacterAppearance WithFacialHairColor(Color newColor)
    {
        return new(HairStyleId, HairColor, FacialHairStyleId, newColor, EyeColor, SkinColor, Markings);
    }

    public HumanoidCharacterAppearance WithEyeColor(Color newColor)
    {
        return new(HairStyleId, HairColor, FacialHairStyleId, FacialHairColor, newColor, SkinColor, Markings);
    }

    public HumanoidCharacterAppearance WithSkinColor(Color newColor)
    {
        return new(HairStyleId, HairColor, FacialHairStyleId, FacialHairColor, EyeColor, newColor, Markings);
    }

    public HumanoidCharacterAppearance WithMarkings(List<Marking> newMarkings)
    {
        return new(HairStyleId, HairColor, FacialHairStyleId, FacialHairColor, EyeColor, SkinColor, newMarkings);
    }

    public HumanoidCharacterAppearance() : this(
        HairStyles.DefaultHairStyle,
        Color.Black,
        HairStyles.DefaultFacialHairStyle,
        Color.Black,
        Color.Black,
        Humanoid.SkinColor.ValidHumanSkinTone,
        new ()
    )
    {
    }

    public static HumanoidCharacterAppearance DefaultWithSpecies(string species)
    {
        var speciesPrototype = IoCManager.Resolve<IPrototypeManager>().Index<SpeciesPrototype>(species);
        var skinColor = speciesPrototype.SkinColoration switch
        {
            HumanoidSkinColor.HumanToned => Humanoid.SkinColor.HumanSkinTone(speciesPrototype.DefaultHumanSkinTone),
            HumanoidSkinColor.Hues => speciesPrototype.DefaultSkinTone,
            HumanoidSkinColor.TintedHues => Humanoid.SkinColor.TintedHues(speciesPrototype.DefaultSkinTone),
            _ => Humanoid.SkinColor.ValidHumanSkinTone
        };

        return new(
            HairStyles.DefaultHairStyle,
            Color.Black,
            HairStyles.DefaultFacialHairStyle,
            Color.Black,
            Color.Black,
            skinColor,
            new ()
        );
    }

    private static IReadOnlyList<Color> RealisticEyeColors = new List<Color>
    {
        Color.Brown,
        Color.Gray,
        Color.Azure,
        Color.SteelBlue,
        Color.Black
    };

    public static HumanoidCharacterAppearance Random(string species, Sex sex)
    {
        var random = IoCManager.Resolve<IRobustRandom>();
        var markingManager = IoCManager.Resolve<MarkingManager>();
        var hairStyles = markingManager.MarkingsByCategoryAndSpecies(MarkingCategories.Hair, species).Keys.ToList();
        var facialHairStyles = markingManager.MarkingsByCategoryAndSpecies(MarkingCategories.FacialHair, species).Keys.ToList();

        var newHairStyle = hairStyles.Count > 0
            ? random.Pick(hairStyles)
            : HairStyles.DefaultHairStyle;

        var newFacialHairStyle = facialHairStyles.Count == 0 || sex == Sex.Female
            ? HairStyles.DefaultFacialHairStyle
            : random.Pick(facialHairStyles);

        var newHairColor = random.Pick(HairStyles.RealisticHairColors);
        newHairColor = newHairColor
            .WithRed(RandomizeColor(newHairColor.R))
            .WithGreen(RandomizeColor(newHairColor.G))
            .WithBlue(RandomizeColor(newHairColor.B));

        // TODO: Add random markings

        var newEyeColor = random.Pick(RealisticEyeColors);

        var skinType = IoCManager.Resolve<IPrototypeManager>().Index<SpeciesPrototype>(species).SkinColoration;

        var newSkinColor = new Color(random.NextFloat(1), random.NextFloat(1), random.NextFloat(1), 1);
        switch (skinType)
        {
            case HumanoidSkinColor.HumanToned:
                var tone = Math.Round(Humanoid.SkinColor.HumanSkinToneFromColor(newSkinColor));
                newSkinColor = Humanoid.SkinColor.HumanSkinTone((int)tone);
                break;
            case HumanoidSkinColor.Hues:
                break;
            case HumanoidSkinColor.TintedHues:
                newSkinColor = Humanoid.SkinColor.ValidTintedHuesSkinTone(newSkinColor);
                break;
        }

        return new HumanoidCharacterAppearance(newHairStyle, newHairColor, newFacialHairStyle, newHairColor, newEyeColor, newSkinColor, new ());

        float RandomizeColor(float channel)
        {
            return MathHelper.Clamp01(channel + random.Next(-25, 25) / 100f);
        }
    }

    public static Color ClampColor(Color color)
    {
        return new(color.RByte, color.GByte, color.BByte);
    }

    public static HumanoidCharacterAppearance EnsureValid(HumanoidCharacterAppearance appearance, string species, Sex sex)
    {
        var hairStyleId = appearance.HairStyleId;
        var facialHairStyleId = appearance.FacialHairStyleId;

        var hairColor = ClampColor(appearance.HairColor);
        var facialHairColor = ClampColor(appearance.FacialHairColor);
        var eyeColor = ClampColor(appearance.EyeColor);

        var proto = IoCManager.Resolve<IPrototypeManager>();
        var markingManager = IoCManager.Resolve<MarkingManager>();

        if (!markingManager.MarkingsByCategory(MarkingCategories.Hair).ContainsKey(hairStyleId))
        {
            hairStyleId = HairStyles.DefaultHairStyle;
        }

        if (!markingManager.MarkingsByCategory(MarkingCategories.FacialHair).ContainsKey(facialHairStyleId))
        {
            facialHairStyleId = HairStyles.DefaultFacialHairStyle;
        }

        var markingSet = new MarkingSet();
        var skinColor = appearance.SkinColor;
        if (proto.TryIndex(species, out SpeciesPrototype? speciesProto))
        {
            markingSet = new MarkingSet(appearance.Markings, speciesProto.MarkingPoints, markingManager, proto);
            markingSet.EnsureValid(markingManager);

            if (!Humanoid.SkinColor.VerifySkinColor(speciesProto.SkinColoration, skinColor))
            {
                skinColor = Humanoid.SkinColor.ValidSkinTone(speciesProto.SkinColoration, skinColor);
            }

            markingSet.EnsureSpecies(species, skinColor, markingManager);
            markingSet.EnsureSexes(sex, markingManager);
        }

        return new HumanoidCharacterAppearance(
            hairStyleId,
            hairColor,
            facialHairStyleId,
            facialHairColor,
            eyeColor,
            skinColor,
            markingSet.GetForwardEnumerator().ToList());
    }

    public bool MemberwiseEquals(ICharacterAppearance maybeOther)
    {
        if (maybeOther is not HumanoidCharacterAppearance other) return false;
        if (HairStyleId != other.HairStyleId) return false;
        if (!HairColor.Equals(other.HairColor)) return false;
        if (FacialHairStyleId != other.FacialHairStyleId) return false;
        if (!FacialHairColor.Equals(other.FacialHairColor)) return false;
        if (!EyeColor.Equals(other.EyeColor)) return false;
        if (!SkinColor.Equals(other.SkinColor)) return false;
        if (!Markings.SequenceEqual(other.Markings)) return false;
        return true;
    }
}