using System.Diagnostics.CodeAnalysis;
using System.Numerics;
using Content.Shared.Access.Components;
using Content.Shared.Humanoid;
using Content.Shared.Inventory;
using Content.Shared.PDA;
using Content.Shared.Roles;
using Robust.Client.GameObjects;
using Robust.Client.Graphics;
using Robust.Shared.Enums;
using Robust.Shared.Prototypes;
using Robust.Shared.Utility;

namespace Content.Client._White.EntityJobInfo;

public sealed class EntityJobInfoOverlay : Overlay
{
    private readonly IEntityManager _entManager;
    private readonly SharedTransformSystem _transform;
    private readonly IPrototypeManager _prototypeManager;
    private readonly InventorySystem _inventorySystem;
    public override OverlaySpace Space => OverlaySpace.WorldSpaceBelowFOV;

    public EntityJobInfoOverlay(IEntityManager entManager, IPrototypeManager protoManager, InventorySystem inventorySystem)
    {
        _entManager = entManager;
        _prototypeManager = protoManager;
        _inventorySystem = inventorySystem;
        _transform = _entManager.EntitySysManager.GetEntitySystem<SharedTransformSystem>();
    }

    protected override void Draw(in OverlayDrawArgs args)
    {
        var handle = args.WorldHandle;
        var rotation = args.Viewport.Eye?.Rotation ?? Angle.Zero;
        var spriteQuery = _entManager.GetEntityQuery<SpriteComponent>();
        var xformQuery = _entManager.GetEntityQuery<TransformComponent>();

        const float scale = 1f;
        var scaleMatrix = Matrix3.CreateScale(new Vector2(scale, scale));
        var rotationMatrix = Matrix3.CreateRotation(-rotation);

        foreach (var hum in _entManager.EntityQuery<HumanoidAppearanceComponent>(true))
        {
            if (!xformQuery.TryGetComponent(hum.Owner, out var xform) ||
                xform.MapID != args.MapId)
            {
                continue;
            }

            var worldPosition = _transform.GetWorldPosition(xform);
            var worldMatrix = Matrix3.CreateTranslation(worldPosition);

            Matrix3.Multiply(scaleMatrix, worldMatrix, out var scaledWorld);
            Matrix3.Multiply(rotationMatrix, scaledWorld, out var matty);

            handle.SetTransform(matty);

            var icon = "NoId";
            var icon_job = GetIcon(hum.Owner);
            if (icon_job != null)
                icon = icon_job;

            var sprite_icon = new SpriteSpecifier.Rsi(new ResPath("/Textures/Interface/Misc/job_icons.rsi"), icon);
            var _iconTexture = _entManager.EntitySysManager.GetEntitySystem<SpriteSystem>().Frame0(sprite_icon);

            // Use the sprite itself if we know its bounds. This means short or tall sprites don't get overlapped
            // by the bar.
            float yOffset;
            float xOffset;
            if (spriteQuery.TryGetComponent(hum.Owner, out var sprite))
            {
                yOffset = sprite.Bounds.Height + 7f; //sprite.Bounds.Height + 7f;
                xOffset = sprite.Bounds.Width - 17f; //sprite.Bounds.Width + 7f;
            }
            else
            {
                yOffset = 1f;
                xOffset = 1f;
            }

            // Position above the entity (we've already applied the matrix transform to the entity itself)
            // Offset by the texture size for every do_after we have.
            var position = new Vector2(xOffset / EyeManager.PixelsPerMeter,
                yOffset / EyeManager.PixelsPerMeter);

            // Draw the underlying bar texture
            if (sprite != null && !sprite.ContainerOccluded)
                handle.DrawTexture(_iconTexture, position);
        }

        handle.UseShader(null);
        handle.SetTransform(Matrix3.Identity);
    }

    private string? GetIcon(EntityUid uid)
    {
        if (_inventorySystem.TryGetSlotEntity(uid, "id", out var idUid))
        {
            // PDA
            if (_entManager.TryGetComponent(idUid, out PdaComponent? pda) &&
                _entManager.TryGetComponent(pda.ContainedId, out IdCardComponent? idCard))
            {
                if (TryMatchJobTitleToIcon(idCard.JobTitle, out string? icon))
                    return icon;
            }
            // ID Card
            if (_entManager.TryGetComponent(idUid, out IdCardComponent? id))
            {
                if (TryMatchJobTitleToIcon(id.JobTitle, out string? icon))
                    return icon;
            }
        }

        return null;
    }

    private string GetNameAndJob(IdCardComponent id)
    {
        var jobSuffix = string.IsNullOrWhiteSpace(id.JobTitle) ? string.Empty : $" ({id.JobTitle})";

        var val = string.IsNullOrWhiteSpace(id.FullName)
            ? Loc.GetString("access-id-card-component-owner-name-job-title-text",
                ("jobSuffix", jobSuffix))
            : Loc.GetString("access-id-card-component-owner-full-name-job-title-text",
                ("fullName", id.FullName),
                ("jobSuffix", jobSuffix));

        return val;
    }

    private bool TryMatchJobTitleToIcon(string? jobTitle, [NotNullWhen(true)] out string? jobIcon)
    {
        foreach (var job in _prototypeManager.EnumeratePrototypes<JobPrototype>())
        {
            if (job.LocalizedName == jobTitle)
            {
                jobIcon = job.Icon;
                return true;
            }
        }

        jobIcon = "CustomId";
        return true; // For 'CustomId' icon we need send 'true' result;
    }
}