using BumpCombat.Constants;
using UnityEngine;

namespace BumpCombat.Defense
{
    [DisallowMultipleComponent]
    public sealed class DefenseTower : MonoBehaviour
    {
        private DefensePrototypeController owner;
        private DefenseConstants tuning;
        private float attackCooldown;
        private TextMesh label;
        private LineRenderer effectRange;
        private static Material effectMaterial;
        private int summonCount;
        private SpriteRenderer bodyRenderer;
        private SpriteRenderer supportAuraRenderer;
        private SpriteRenderer supportRangeRenderer;
        private Sprite[] supportRangeFrames;
        private float supportRangeFrameTime;
        private int supportRangeFrame;
        private Sprite[] bodyIdleFrames;
        private Sprite[] bodyAttackFrames;
        private string bodyIdleKey;
        private string bodyAttackKey;
        private float bodyFrameTime;
        private int bodyFrame;
        private bool bodyAttacking;
        private string supportAuraKey;
        private Sprite[] supportAuraFrames;

        public DefenseTowerKind Kind { get; private set; }
        public DefenseTowerBranch Branch { get; private set; }
        public int Tier { get; private set; } = 1;
        public int PadIndex { get; private set; }
        public bool IsOperational => isActiveAndEnabled
            && owner != null
            && owner.CanOperateTowers;
        public bool IsDamaging => Kind != DefenseTowerKind.Empowering;

        public void Configure(
            DefensePrototypeController controller,
            DefenseTowerKind kind,
            int padIndex,
            DefenseConstants constants)
        {
            owner = controller;
            Kind = kind;
            PadIndex = padIndex;
            tuning = constants;
            Tier = 1;
            Branch = DefenseTowerBranch.None;
            CreateVisuals();
            if (Kind == DefenseTowerKind.Summon)
            {
                AddSummonUnits(tuning.SummonUnitCount);
            }
        }

        public bool Upgrade(DefenseTowerBranch branch)
        {
            if (Tier >= 4 || (Tier < 3 && branch != DefenseTowerBranch.None)
                || (Tier == 3 && branch != DefenseTowerBranch.First
                    && branch != DefenseTowerBranch.Second))
            {
                return false;
            }

            Tier++;
            if (Tier == 4)
            {
                Branch = branch;
            }

            if (Kind == DefenseTowerKind.Summon)
            {
                if (Tier == 4 && Branch == DefenseTowerBranch.First)
                {
                    foreach (DefenseSummonUnit unit in GetComponentsInChildren<DefenseSummonUnit>())
                    {
                        unit.enabled = false;
                        Destroy(unit.gameObject);
                    }
                    summonCount = 0;
                    AddSummonUnits(1);
                }
                else
                {
                    AddSummonUnits(Tier == 4 ? 2 : 1);
                }
            }

            UpdateLabel();
            UpdateEffectRange();
            UpdateBodyArt();
            UpdateSupportAura();
            foreach (DefenseSummonUnit unit in GetComponentsInChildren<DefenseSummonUnit>())
            {
                unit.RefreshArt();
            }
            return true;
        }

        private void OnDisable()
        {
            if (supportAuraRenderer != null)
            {
                supportAuraRenderer.enabled = false;
            }
        }

        private void Update()
        {
            UpdateBodyAnimation();
            if (Kind == DefenseTowerKind.Empowering)
                UpdateEffectRange();
            else if (effectRange != null)
                effectRange.transform.localPosition = DefenseTowerArtBounds.CharacterShadowOffset(
                    Kind, bodyRenderer != null && bodyRenderer.flipX);
            UpdateSupportAura();
            UpdateSupportRangeAnimation();
            if (!IsOperational || Kind == DefenseTowerKind.Summon
                || Kind == DefenseTowerKind.Empowering)
            {
                return;
            }

            attackCooldown -= Time.deltaTime;
            if (attackCooldown > 0f)
            {
                return;
            }

            if (owner.TryAttackFromTower(this))
            {
                float interval = Kind switch
                {
                    DefenseTowerKind.Direct => tuning.DirectTowerAttackInterval,
                    DefenseTowerKind.Lightning => tuning.LightningInterval,
                    DefenseTowerKind.Cold => tuning.ColdInterval,
                    _ => tuning.SeismicInterval,
                };
                if (Tier == 4 && Kind == DefenseTowerKind.Direct
                    && Branch == DefenseTowerBranch.Second)
                {
                    interval *= 0.4f;
                }

                attackCooldown = Mathf.Max(0.05f,
                    interval / (1f + 0.15f * (Tier - 1))
                    * owner.GetTowerAttackIntervalMultiplier(this));
            }
        }

        public bool TryPulse()
        {
            if (!IsOperational || Kind == DefenseTowerKind.Empowering
                || Kind == DefenseTowerKind.Summon)
            {
                return false;
            }

            float range = GetEffectRange();
            DefenseRouteAgent target = owner.FindNearestTarget(
                transform.position, range, Kind,
                Kind == DefenseTowerKind.Cold || Kind == DefenseTowerKind.Seismic);
            if (target == null)
            {
                return false;
            }

            Vector2 center = target.transform.position;
            Vector2 lightningVisualCenter = DefenseTowerArtBounds.EnemyShadowWorldPosition(
                target.Enemy, target.transform.position);
            float scale = 1f + tuning.TowerDamageBonusPerTier * (Tier - 1);
            float impactRadius = 0f;
            bool cone = false;
            bool applied;
            switch (Kind)
            {
                case DefenseTowerKind.Direct:
                    if (Tier == 4 && Branch == DefenseTowerBranch.Second)
                    {
                        cone = true;
                        impactRadius = range;
                        applied = AttackCone(center - (Vector2)transform.position,
                            range, tuning.DirectTowerDamage * scale * 0.4f);
                    }
                    else if (Tier == 4)
                    {
                        impactRadius = 1.8f;
                        applied = AttackArea(center, impactRadius,
                            tuning.DirectTowerDamage * scale * 1.6f);
                    }
                    else
                    {
                        applied = owner.TryApplyTowerDamage(this, target,
                            tuning.DirectTowerDamage * scale);
                    }
                    break;

                case DefenseTowerKind.Lightning:
                    impactRadius = Tier == 4
                        ? (Branch == DefenseTowerBranch.First ? 3f : 2.4f)
                        : tuning.LightningRadius;
                    applied = AttackArea(center, impactRadius,
                        tuning.LightningDamage * scale
                        * (Tier == 4 && Branch == DefenseTowerBranch.Second ? 1.4f : 1f),
                        Tier == 4 && Branch == DefenseTowerBranch.First ? 3 : int.MaxValue);
                    break;

                case DefenseTowerKind.Cold:
                    if (Tier == 4 && Branch == DefenseTowerBranch.Second)
                    {
                        impactRadius = 1.65f;
                        applied = AttackArea(center, impactRadius,
                            tuning.ColdDamage * scale * 0.5f,
                            int.MaxValue, tuning.ColdSlowSeconds * 1.5f,
                            tuning.ColdSlowFraction, 0.35f);
                    }
                    else
                    {
                        bool slowed = owner.TryApplyTowerSlow(this, target,
                            tuning.ColdSlowSeconds * (1f + 0.25f * (Tier - 1)),
                            tuning.ColdSlowFraction);
                        bool damaged = owner.TryApplyTowerDamage(this, target,
                            tuning.ColdDamage * scale * (Tier == 4 ? 1.8f : 1f));
                        if (Tier == 4)
                        {
                            owner.TryApplyTowerStun(this, target, 0.3f);
                        }
                        applied = slowed || damaged;
                    }
                    break;

                case DefenseTowerKind.Seismic:
                    impactRadius = Tier == 4
                        ? (Branch == DefenseTowerBranch.Second ? 2.2f : 1.8f)
                        : tuning.SeismicRadius;
                    applied = Tier == 4 && Branch == DefenseTowerBranch.Second
                        ? AttackArea(center, impactRadius,
                            tuning.SeismicDamage * scale, int.MaxValue, 2f, 0.5f)
                        : AttackArea(center, impactRadius,
                            tuning.SeismicDamage * scale, int.MaxValue,
                            0f, 0f,
                            tuning.SeismicStunSeconds * (Tier == 4 ? 2f : 1f));
                    break;

                default:
                    return false;
            }

            if (applied)
            {
                PlayBodyAttack(center.x < transform.position.x);
                bool shadowCenteredCircle = Kind == DefenseTowerKind.Seismic
                    || (Kind == DefenseTowerKind.Cold && Tier == 4
                        && Branch == DefenseTowerBranch.Second);
                ShowAttackEffect(center, impactRadius, cone,
                    visualCenter: Kind == DefenseTowerKind.Lightning || shadowCenteredCircle
                        ? lightningVisualCenter : null);
            }
            return applied;
        }

        private bool AttackCone(Vector2 direction, float range, float damage)
        {
            bool applied = false;
            Vector2 facing = direction.normalized;
            foreach (DefenseRouteAgent agent in owner.GetTargetsInRange(
                transform.position, range))
            {
                Vector2 toAgent = ((Vector2)agent.transform.position
                    - (Vector2)transform.position).normalized;
                if (toAgent.sqrMagnitude < 0.000001f
                    || Vector2.Dot(facing, toAgent) >= 0.5f)
                {
                    applied |= owner.TryApplyTowerDamage(this, agent, damage);
                }
            }

            return applied;
        }

        private bool AttackArea(
            Vector2 center,
            float radius,
            float damage,
            int maxTargets = int.MaxValue,
            float slowSeconds = 0f,
            float slowFraction = 0f,
            float stunSeconds = 0f)
        {
            bool applied = false;
            int count = 0;
            foreach (DefenseRouteAgent agent in owner.GetTargetsInRange(center, radius))
            {
                if (count++ >= maxTargets)
                {
                    break;
                }

                bool damaged = owner.TryApplyTowerDamage(this, agent, damage);
                bool slowed = slowSeconds > 0f
                    && owner.TryApplyTowerSlow(this, agent, slowSeconds, slowFraction);
                bool stunned = stunSeconds > 0f
                    && owner.TryApplyTowerStun(this, agent, stunSeconds);
                applied |= damaged || slowed || stunned;
            }

            return applied;
        }

        public bool TryAttack(DefenseRouteAgent target)
        {
            if (target == null || owner == null || !IsOperational)
            {
                return false;
            }

            float damage = Kind == DefenseTowerKind.Summon
                ? tuning.SummonDamage : tuning.DirectTowerDamage;
            damage *= 1f + tuning.TowerDamageBonusPerTier * (Tier - 1);
            if (Tier == 4 && Kind == DefenseTowerKind.Summon
                && Branch == DefenseTowerBranch.First)
            {
                damage *= 1.8f;
            }

            bool hit = owner.TryApplyTowerDamage(this, target, damage);
            if (hit && Tier == 4 && Kind == DefenseTowerKind.Summon
                && Branch == DefenseTowerBranch.First)
            {
                owner.TryApplyTowerStun(this, target, 0.3f);
            }

            return hit;
        }

        public void ShowSummonAttackEffect(Vector2 origin, Vector2 target)
        {
            if (IsOperational && Kind == DefenseTowerKind.Summon)
            {
                ShowAttackEffect(target, 0f, false, origin);
            }
        }

        private float GetEffectRange()
        {
            if (Kind == DefenseTowerKind.Summon)
            {
                return tuning.SummonAreaRadius;
            }
            if (Kind == DefenseTowerKind.Empowering)
            {
                return tuning.SupportRadius;
            }
            return Kind == DefenseTowerKind.Direct && Tier == 4
                && Branch == DefenseTowerBranch.Second
                ? tuning.TowerRange * 0.5f : tuning.TowerRange;
        }

        private void CreateEffectRange()
        {
            GameObject rangeObject = new("Effect Range");
            rangeObject.transform.SetParent(transform, false);
            if (Kind == DefenseTowerKind.Empowering)
            {
                supportRangeRenderer = rangeObject.AddComponent<SpriteRenderer>();
                supportRangeRenderer.sortingOrder = 3;
                supportRangeFrames = DefenseTowerArt.Load("SupportRange/T1-Aura");
                if (supportRangeFrames.Length > 0)
                {
                    supportRangeRenderer.sprite = supportRangeFrames[0];
                    supportRangeRenderer.color = new Color(1f, 1f, 1f, tuning.SupportRangeAlpha);
                }
                UpdateEffectRange();
                return;
            }
            effectRange = rangeObject.AddComponent<LineRenderer>();
            effectRange.useWorldSpace = false;
            effectRange.loop = true;
            effectRange.positionCount = 48;
            effectRange.sharedMaterial = GetEffectMaterial();
            effectRange.sortingOrder = 3;
            Color color = GetTowerColor();
            color.a = Kind == DefenseTowerKind.Empowering ? 0.35f : 0.22f;
            effectRange.startColor = color;
            effectRange.endColor = color;
            UpdateEffectRange();
        }

        private void UpdateEffectRange()
        {
            if (Kind == DefenseTowerKind.Empowering && supportRangeRenderer != null)
            {
                Sprite sprite = supportRangeRenderer.sprite;
                if (sprite == null) return;
                RectInt bounds = DefenseConstants.SupportRangeAlphaBounds[Mathf.Clamp(supportRangeFrame, 0, DefenseConstants.SupportRangeAlphaBounds.Length - 1)];
                Vector2 lossyScale = transform.lossyScale;
                Vector2 localScale = new(
                    tuning.SupportRadius * 2f * sprite.pixelsPerUnit / (bounds.width * Mathf.Max(0.001f, lossyScale.x)),
                    tuning.SupportRadius * 2f * sprite.pixelsPerUnit / (bounds.height * Mathf.Max(0.001f, lossyScale.y)));
                Color[] colors = tuning.SupportTierColors;
                Color sourceColor = colors != null && colors.Length > 0
                    ? colors[Mathf.Clamp(Tier - 1, 0, colors.Length - 1)]
                    : new Color32(151, 169, 119, 102);
                sourceColor.a *= tuning.SupportRangeAlpha;
                supportRangeRenderer.color = sourceColor;
                Vector2 alphaCenterBottomLeft = new(
                    bounds.x + bounds.width * 0.5f,
                    100f - bounds.y - bounds.height * 0.5f);
                Vector2 correctionLocal = Vector2.Scale(
                    (alphaCenterBottomLeft - sprite.pivot) / sprite.pixelsPerUnit, localScale);
                Vector2 shadow = DefenseTowerArtBounds.CharacterShadowOffset(
                    Kind, bodyRenderer != null && bodyRenderer.flipX);
                supportRangeRenderer.transform.localPosition = shadow - correctionLocal;
                supportRangeRenderer.transform.localScale = new Vector3(localScale.x, localScale.y, 1f);
                return;
            }
            if (effectRange == null)
            {
                return;
            }
            effectRange.transform.localPosition = DefenseTowerArtBounds.CharacterShadowOffset(
                Kind, bodyRenderer != null && bodyRenderer.flipX);
            float worldScale = Mathf.Max(0.001f, transform.lossyScale.x);
            float radius = GetEffectRange() / worldScale;
            effectRange.startWidth = 0.055f / worldScale;
            effectRange.endWidth = effectRange.startWidth;
            for (int i = 0; i < effectRange.positionCount; i++)
            {
                float angle = i * Mathf.PI * 2f / effectRange.positionCount;
                effectRange.SetPosition(i, new Vector3(
                    Mathf.Cos(angle) * radius,
                    Mathf.Sin(angle) * radius, 0f));
            }
        }

        private void ShowAttackEffect(
            Vector2 center, float radius, bool cone, Vector2? source = null,
            Vector2? visualCenter = null)
        {
            Vector2 origin = source ?? (Vector2)transform.position;
            Vector2 direction = center - origin;
            GameObject effect = new($"{Kind} Attack Effect");
            effect.transform.SetParent(transform.parent, false);
            bool shadowCenteredCircle = Kind == DefenseTowerKind.Seismic
                || (Kind == DefenseTowerKind.Cold && Tier == 4
                    && Branch == DefenseTowerBranch.Second);
            Vector2 effectCenter = shadowCenteredCircle ? visualCenter ?? center : center;
            effect.transform.position = effectCenter;
            Color color = GetTowerColor();
            color.a = 0.9f;

            switch (Kind)
            {
                case DefenseTowerKind.Direct:
                    ShowFireArt(effect.transform, origin, center, direction);
                    break;
                case DefenseTowerKind.Lightning:
                    Vector2 shadowOrigin = transform.TransformPoint(DefenseTowerArtBounds.CharacterShadowOffset(Kind, bodyRenderer != null && bodyRenderer.flipX));
                    Vector2 impactCenter = visualCenter ?? center;
                    ShowLightningArt(effect.transform, shadowOrigin, impactCenter,
                        impactCenter - shadowOrigin, radius);
                    break;
                case DefenseTowerKind.Cold:
                    ShowColdArt(effect.transform, origin, center, direction,
                        shadowCenteredCircle ? effectCenter : (Vector2?)null);
                    break;
                case DefenseTowerKind.Seismic:
                    string controlKey = Tier == 4
                        ? (Branch == DefenseTowerBranch.First
                            ? "Effects/Control/StoneGaze" : "Effects/Control/Temporal")
                        : $"Effects/Control/T{Tier}-Aura";
                    int visibleWidth = Tier == 4
                        ? (Branch == DefenseTowerBranch.First ? 40 : 45)
                        : 32 + (Tier - 1) * 6;
                    float controlScale = ScaleToVisibleWidth(radius * 2f, visibleWidth);
                    CreateAnimatedArt(effect.transform, "Impact Sprite", controlKey,
                        effectCenter, Vector2.one * controlScale, 0f, 13);
                    break;
                case DefenseTowerKind.Summon:
                    if (Tier == 4 && Branch == DefenseTowerBranch.Second)
                    {
                        for (int i = 0; i < 5; i++)
                        {
                            Vector2 spikePosition = Vector2.Lerp(origin, center, (i + 1) / 5f);
                            CreateAnimatedArt(effect.transform, $"Shot Sprite {i + 1}",
                                "Summons/LavaSlime/GroundSpike-Segment", spikePosition,
                                Vector2.one, 0f, 14, startDelay: i * 0.12f);
                        }
                    }
                    else
                    {
                        CreateAnimatedArt(effect.transform, "Impact Sprite",
                            "Effects/Fire/Impact", center, Vector2.one, 0f, 13);
                    }
                    break;
            }

            if (cone)
            {
                LineRenderer outline = CreateEffectLine(
                    effect.transform, "Cone Radius", color, 0.07f);
                outline.positionCount = 3;
                Vector2 forward = direction.normalized * radius;
                outline.SetPosition(0, origin - center);
                outline.SetPosition(1, origin - center
                    + (Vector2)(Quaternion.Euler(0f, 0f, -60f) * forward));
                outline.SetPosition(2, origin - center
                    + (Vector2)(Quaternion.Euler(0f, 0f, 60f) * forward));
                Destroy(outline.gameObject, 0.22f);
            }
            else if (radius > 0f)
            {
                LineRenderer area = CreateEffectLine(
                    effect.transform, "Impact Radius", color, 0.07f);
                area.loop = true;
                area.positionCount = 40;
                for (int i = 0; i < area.positionCount; i++)
                {
                    float angle = i * Mathf.PI * 2f / area.positionCount;
                    area.SetPosition(i, new Vector3(
                        Mathf.Cos(angle) * radius,
                        Mathf.Sin(angle) * radius, 0f));
                }
                Destroy(area.gameObject, 0.22f);
            }

            Destroy(effect, 1.6f);
        }

        private void ShowFireArt(
            Transform parent, Vector2 origin, Vector2 center, Vector2 direction)
        {
            if (Tier == 4 && Branch == DefenseTowerBranch.First)
            {
                SpriteRenderer meteor = CreateAnimatedArt(parent, "Impact Sprite",
                    "Effects/Fire/Meteor-Flight", center + new Vector2(-0.81f, 0.81f),
                    Vector2.one, 0f, 13, "Effects/Fire/Meteor-Impact");
                DefenseSpriteSequence sequence = meteor.GetComponent<DefenseSpriteSequence>();
                Vector2 start = center + new Vector2(-0.81f, 0.81f);
                meteor.transform.position = start;
                sequence.Travel(start, center, 0.32f);
                return;
            }

            if (Tier == 4 && Branch == DefenseTowerBranch.Second)
            {
                float visibleWidth = 88f / 32f;
                float scaleX = Mathf.Max(0.1f, direction.magnitude / visibleWidth);
                CreateAnimatedArt(parent, "Shot Sprite", "Effects/Fire/Flamethrower",
                    origin, new Vector2(scaleX, 1f),
                    Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg,
                    14);
            }
            else
            {
                string key = $"Effects/Fire/T{Tier}-Fireball";
                SpriteRenderer shot = CreateAnimatedArt(parent, "Shot Sprite", key,
                    Vector2.Lerp(origin, center, 0.5f), Vector2.one * 0.85f,
                    Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg, 14);
                DefenseSpriteSequence sequence = shot.GetComponent<DefenseSpriteSequence>();
                sequence.Travel(origin, center, 0.18f);
            }
            CreateAnimatedArt(parent, "Impact Sprite", "Effects/Fire/Impact",
                center, Vector2.one, 0f, 13, startDelay: 0.18f);
        }

        private void ShowLightningArt(
            Transform parent, Vector2 origin, Vector2 center,
            Vector2 direction, float radius)
        {
            if (Tier == 4 && Branch == DefenseTowerBranch.Second)
            {
                float scale = Mathf.Max(0.8f, radius / 1.2f);
                CreateAnimatedArt(parent, "Shot Sprite", "Effects/Lightning/LightningStorm",
                    center, Vector2.one * scale, 0f, 13);
            }
            else
            {
                string key = Tier == 4
                    ? "Effects/Lightning/Arc" : $"Effects/Lightning/T{Tier}-Bolt";
                SpriteRenderer bolt = CreateAnimatedArt(parent, "Shot Sprite", key, origin,
                    Vector2.one, Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg, 14);
                bolt.GetComponent<DefenseSpriteSequence>().FitLightningBeam(origin, center, 1f);
            }
            float waveScale = Mathf.Max(0.8f, radius / 1.4f);
            SpriteRenderer wave = CreateAnimatedArt(parent, "Impact Sprite", "Effects/Lightning/ImpactWave",
                center, Vector2.one * waveScale, 0f, 13, startDelay: 0.15f);
            wave.GetComponent<DefenseSpriteSequence>().CenterImpactWave(center, waveScale);
        }

        private void ShowColdArt(
            Transform parent, Vector2 origin, Vector2 center, Vector2 direction,
            Vector2? visualCenter = null)
        {
            if (Tier == 4 && Branch == DefenseTowerBranch.Second)
            {
                float cageScale = ScaleToVisibleWidth(3.3f, 48f);
                Vector2 cageCenter = visualCenter ?? center;
                CreateAnimatedArt(parent, "Shot Sprite", "Effects/Ice/GlacialCage-Back",
                    cageCenter, Vector2.one * cageScale, 0f, 12);
                CreateAnimatedArt(parent, "Impact Sprite", "Effects/Ice/GlacialCage-Front",
                    cageCenter, Vector2.one * cageScale, 0f, 14);
                return;
            }

            string key = Tier == 4
                ? "Effects/Ice/Freezebolt" : $"Effects/Ice/T{Tier}-Volley";
            SpriteRenderer shot = CreateAnimatedArt(parent, "Shot Sprite", key,
                Vector2.Lerp(origin, center, 0.5f), Vector2.one,
                Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg, 14);
            shot.GetComponent<DefenseSpriteSequence>().Travel(origin, center, 0.18f);
            CreateAnimatedArt(parent, "Impact Sprite", "Effects/Ice/Impact",
                center, Vector2.one, 0f, 13, startDelay: 0.18f);
        }

        private static SpriteRenderer CreateAnimatedArt(
            Transform parent, string name, string key, Vector2 position,
            Vector2 scale, float rotation, int sortingOrder,
            string nextKey = null, float startDelay = 0f)
        {
            GameObject spriteObject = new(name);
            spriteObject.transform.SetParent(parent, false);
            spriteObject.transform.position = position;
            spriteObject.transform.localScale = new Vector3(scale.x, scale.y, 1f);
            spriteObject.transform.rotation = Quaternion.Euler(0f, 0f, rotation);
            SpriteRenderer renderer = spriteObject.AddComponent<SpriteRenderer>();
            renderer.color = Color.white;
            renderer.sortingOrder = sortingOrder;
            Sprite[] frames = DefenseTowerArt.Load(key);
            Sprite[] next = string.IsNullOrEmpty(nextKey)
                ? null : DefenseTowerArt.Load(nextKey);
            spriteObject.AddComponent<DefenseSpriteSequence>().Play(
                renderer, key, frames, true, nextKey, next, startDelay);
            return renderer;
        }

        private static float ScaleToVisibleWidth(float worldWidth, float visiblePixels)
        {
            return worldWidth / (visiblePixels / 32f);
        }

        private static LineRenderer CreateEffectLine(
            Transform parent, string name, Color color, float width)
        {
            GameObject shape = new(name);
            shape.transform.SetParent(parent, false);
            LineRenderer line = shape.AddComponent<LineRenderer>();
            line.useWorldSpace = false;
            line.sharedMaterial = GetEffectMaterial();
            line.startWidth = width;
            line.endWidth = width;
            line.startColor = color;
            line.endColor = color;
            line.sortingOrder = 14;
            return line;
        }

        private static Material GetEffectMaterial()
        {
            if (effectMaterial == null)
            {
                effectMaterial = new Material(Shader.Find("Sprites/Default"));
                effectMaterial.hideFlags = HideFlags.HideAndDontSave;
            }
            return effectMaterial;
        }

        private void AddSummonUnits(int count)
        {
            for (int i = 0; i < count; i++)
            {
                int unitIndex = summonCount++;
                GameObject unitObject = new($"Summon Unit {unitIndex + 1}");
                unitObject.transform.SetParent(transform, false);
                unitObject.transform.localPosition = new Vector3(
                    (unitIndex % 3 - 1) * 0.42f, -0.5f - 0.25f * (unitIndex / 3), 0f);
                DefenseSummonUnit unit = unitObject.AddComponent<DefenseSummonUnit>();
                unit.Configure(this, owner, unitObject.transform.localPosition);
            }
        }

        private void CreateVisuals()
        {
            SpriteRenderer rootRenderer = gameObject.GetComponent<SpriteRenderer>();
            if (rootRenderer == null)
            {
                rootRenderer = gameObject.AddComponent<SpriteRenderer>();
            }
            rootRenderer.sprite = DefensePrototypeController.WhiteSprite;
            rootRenderer.color = Color.white;
            rootRenderer.enabled = false;
            transform.localScale = new Vector3(0.72f, 0.72f, 1f);

            GameObject bodyObject = new("Tower Body");
            bodyObject.transform.SetParent(transform, false);
            bodyObject.transform.localScale = new Vector3(2.1f, 2.1f, 1f);
            bodyRenderer = bodyObject.AddComponent<SpriteRenderer>();
            bodyRenderer.color = Color.white;
            bodyRenderer.sortingOrder = 8;
            UpdateBodyArt();

            GameObject labelObject = new("Tower Label");
            labelObject.transform.SetParent(transform, false);
            labelObject.transform.localPosition = new Vector3(0f, 0.85f, 0f);
            label = labelObject.AddComponent<TextMesh>();
            label.anchor = TextAnchor.MiddleCenter;
            label.alignment = TextAlignment.Center;
            label.characterSize = 0.16f;
            label.fontSize = 32;
            label.color = Color.white;
            label.GetComponent<MeshRenderer>().sortingOrder = 10;
            UpdateLabel();
            CreateEffectRange();
        }

        private void UpdateBodyArt()
        {
            bodyIdleKey = DefenseTowerArt.BodyKey(Kind, Tier, "Idle");
            bodyIdleFrames = DefenseTowerArt.Load(bodyIdleKey);
            bodyAttackKey = Kind switch
            {
                DefenseTowerKind.Direct or DefenseTowerKind.Lightning or DefenseTowerKind.Cold
                    => DefenseTowerArt.BodyKey(Kind, Tier, "Attack01"),
                DefenseTowerKind.Seismic => DefenseTowerArt.BodyKey(Kind, Tier, "Attack"),
                DefenseTowerKind.Empowering => DefenseTowerArt.BodyKey(Kind, Tier, "Heal"),
                _ => null,
            };
            bodyAttackFrames = bodyAttackKey == null
                ? System.Array.Empty<Sprite>() : DefenseTowerArt.Load(bodyAttackKey);
            bodyAttacking = false;
            bodyFrame = 0;
            bodyFrameTime = 0f;
            if (bodyRenderer != null && bodyIdleFrames.Length > 0)
            {
                bodyRenderer.sprite = bodyIdleFrames[0];
            }
        }

        private void PlayBodyAttack(bool faceLeft)
        {
            if (bodyRenderer == null || bodyAttackFrames == null || bodyAttackFrames.Length == 0)
            {
                return;
            }
            bodyRenderer.flipX = faceLeft;
            bodyAttacking = true;
            bodyFrame = 0;
            bodyFrameTime = 0f;
            bodyRenderer.sprite = bodyAttackFrames[0];
        }

        private void UpdateBodyAnimation()
        {
            if (bodyRenderer == null || bodyIdleFrames == null || bodyIdleFrames.Length == 0)
            {
                return;
            }
            bodyFrameTime += Time.deltaTime;
            Sprite[] frames = bodyAttacking ? bodyAttackFrames : bodyIdleFrames;
            string key = bodyAttacking ? bodyAttackKey : bodyIdleKey;
            if (frames == null || frames.Length == 0)
            {
                bodyAttacking = false;
                return;
            }
            while (bodyFrameTime >= DefenseTowerArt.FrameSeconds(key, bodyFrame))
            {
                bodyFrameTime -= DefenseTowerArt.FrameSeconds(key, bodyFrame);
                bodyFrame++;
                if (bodyFrame >= frames.Length)
                {
                    if (bodyAttacking)
                    {
                        bodyAttacking = false;
                        bodyFrame = 0;
                        frames = bodyIdleFrames;
                        key = bodyIdleKey;
                    }
                    else
                    {
                        bodyFrame = 0;
                    }
                }
                bodyRenderer.sprite = frames[bodyFrame];
            }
        }

        private void UpdateSupportAura()
        {
            DefenseTower support = owner != null ? owner.GetActiveSupportFor(this) : null;
            if (support == null)
            {
                if (supportAuraRenderer != null) supportAuraRenderer.enabled = false;
                return;
            }
            if (supportAuraRenderer == null)
            {
                GameObject auraObject = new("Support Aura Art");
                auraObject.transform.SetParent(transform, false);
                supportAuraRenderer = auraObject.AddComponent<SpriteRenderer>();
            }
            string motionKey = bodyAttacking && !string.IsNullOrEmpty(bodyAttackKey) ? bodyAttackKey : bodyIdleKey;
            string key = motionKey.Replace("Bodies/", "SupportMasks/");
            if (supportAuraKey != key)
            {
                supportAuraKey = key;
                supportAuraFrames = DefenseTowerArt.Load(key);
            }
            int maskFrame = 0;
            if (bodyRenderer != null && supportAuraFrames != null)
            {
                for (int i = 0; i < supportAuraFrames.Length; i++)
                    if (supportAuraFrames[i].name == bodyRenderer.sprite.name) { maskFrame = i; break; }
            }
            supportAuraRenderer.sprite = supportAuraFrames != null && supportAuraFrames.Length > maskFrame
                ? supportAuraFrames[maskFrame] : null;
            supportAuraRenderer.flipX = bodyRenderer != null && bodyRenderer.flipX;
            supportAuraRenderer.transform.localPosition = bodyRenderer != null ? bodyRenderer.transform.localPosition : Vector3.zero;
            supportAuraRenderer.transform.localScale = bodyRenderer != null ? bodyRenderer.transform.localScale : Vector3.one;
            supportAuraRenderer.sortingOrder = bodyRenderer != null ? bodyRenderer.sortingOrder + 1 : 9;
            Color[] colors = tuning.SupportTierColors;
            supportAuraRenderer.color = colors != null && colors.Length > 0
                ? colors[Mathf.Clamp(support.Tier - 1, 0, colors.Length - 1)]
                : new Color32(151, 169, 119, 102);
            supportAuraRenderer.enabled = supportAuraFrames != null && supportAuraFrames.Length > 0 && supportAuraRenderer.sprite != null;
        }

        private void UpdateSupportRangeAnimation()
        {
            if (supportRangeRenderer == null || supportRangeFrames == null || supportRangeFrames.Length == 0) return;
            supportRangeFrameTime += Time.deltaTime;
            while (supportRangeFrameTime >= 0.14f)
            {
                supportRangeFrameTime -= 0.14f;
                supportRangeFrame = (supportRangeFrame + 1) % supportRangeFrames.Length;
                supportRangeRenderer.sprite = supportRangeFrames[supportRangeFrame];
                UpdateEffectRange();
            }
        }

        private Color GetTowerColor()
        {
            return Kind switch
            {
                DefenseTowerKind.Direct => new Color32(240, 96, 65, 255),
                DefenseTowerKind.Summon => new Color32(244, 154, 74, 255),
                DefenseTowerKind.Lightning => new Color32(238, 218, 83, 255),
                DefenseTowerKind.Cold => new Color32(65, 211, 240, 255),
                DefenseTowerKind.Seismic => new Color32(175, 141, 100, 255),
                _ => new Color32(148, 228, 122, 255),
            };
        }

        private void UpdateLabel()
        {
            if (label == null)
            {
                return;
            }

            string family = Kind == DefenseTowerKind.Direct ? "FIRE" : Kind.ToString().ToUpperInvariant();
            string branchName = Tier == 4
                ? GetBranchName(Kind, Branch) : string.Empty;
            label.text = Tier == 4
                ? $"{family} IV\n{branchName}"
                : $"{family} {Tier}";
        }

        public static string GetBranchName(DefenseTowerKind kind, DefenseTowerBranch branch)
        {
            bool first = branch == DefenseTowerBranch.First;
            return kind switch
            {
                DefenseTowerKind.Direct => first ? "METEOR" : "FLAMETHROWER",
                DefenseTowerKind.Lightning => first ? "ARC" : "LIGHTNING STORM",
                DefenseTowerKind.Cold => first ? "FREEZEBOLT" : "GLACIAL CAGE",
                DefenseTowerKind.Seismic => first ? "STONE GAZE" : "TEMPORAL",
                DefenseTowerKind.Summon => first ? "SENTINEL" : "SCOUT",
                _ => first ? "IMBUING" : "SMOTHERING",
            };
        }
    }
}