using ForgottenWawiTech.Content.Projectiles;
using ForgottenWawiTech.Content.Players;
using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;
using ForgottenWawiTech.Content.Rarities;

namespace ForgottenWawiTech.Content.Items.Weapons.Magic
{
	// A post-Eye of Cthulhu melee/magic hybrid style weapon that swings like a sword and
	// emits a flurry of short-lived beam projectiles toward the cursor during the swing.
	// Beams have reduced damage (50% of item base) and very short lifetime.
	public class BeamAttackWand : ModItem
	{
		public override void SetStaticDefaults()
		{
			// DisplayName.SetDefault("Beam Attack Wand"); // tML auto localizes; optional if using hjson.
			// Tooltip.SetDefault("Swings and releases a flurry of brief energy beams");
		}

		public override void SetDefaults()
		{
			Item.width = 32;
			Item.height = 32;
			Item.useStyle = ItemUseStyleID.Swing;
			Item.useAnimation = 28; // frames the swing lasts
			Item.useTime = 28; // one use per full animation
			Item.autoReuse = true;
			Item.UseSound = SoundID.Item1;
			Item.damage = 25;
			Item.knockBack = 4.5f;
			Item.DamageType = DamageClass.Magic; // treat beams as melee for synergy
			Item.rare = ModContent.RarityType<DeveloperItem>();
			Item.value = Item.buyPrice(silver: 50);
			Item.shoot = ModContent.ProjectileType<BeamAttackWandBeam>();
			Item.shootSpeed = 12f; // base speed of beams
            Item.noMelee = false;
            Item.mana = 3;
		}

		// No recipe: obtained from Eye of Cthulhu treasure bag (see GlobalItem loot class)

		public override void HoldItem(Player player)
		{
			// Emit beams only while the item is mid-swing
			if (player.itemAnimation > 0 && player.HeldItem.type == Item.type && player.whoAmI == Main.myPlayer)
			{
				var modPlayer = player.GetModPlayer<BeamAttackWandPlayer>();
				modPlayer.BeamEmissionTimer--;
				if (modPlayer.BeamEmissionTimer <= 0)
				{
					// Kirby-style beam: a sweeping whip that leaves a multi-beam arc.
					// We'll spawn several beams at once in a tight angular spread around a smoothed central swing rotation.
					float targetRot = player.itemRotation + (player.direction == -1 ? MathHelper.Pi : 0f);
					if (modPlayer.LastBeamRot == 0f)
						modPlayer.LastBeamRot = targetRot;
					// Smooth aggressively so the arc persists briefly (lower factor = larger persistence)
					float smoothedRot = modPlayer.LastBeamRot + MathHelper.WrapAngle(targetRot - modPlayer.LastBeamRot) * 0.25f;
					modPlayer.LastBeamRot = smoothedRot;

					// Determine swing progress (0..1) to slightly widen arc near middle of swing
					float swingProgress = 1f - (player.itemAnimation / (float)player.itemAnimationMax);
					// Arc width scales up mid-swing then back down
					float baseArc = 0.30f; // radians total small arc
					float arcWidth = baseArc * (float)(1.0 - System.Math.Pow(2 * swingProgress - 1, 2)); // bell curve widen

					int beamsThisBurst = 4; // number of simultaneous beams
					int beamDamage = (int)(Item.damage * 0.45f); // slight reduction since multiple per tick
					for (int i = 0; i < beamsThisBurst; i++)
					{
						// Evenly distribute within arc centered on smoothedRot
						float lerp = beamsThisBurst == 1 ? 0f : i / (float)(beamsThisBurst - 1);
						float offset = MathHelper.Lerp(-arcWidth * 0.5f, arcWidth * 0.5f, lerp);
						float beamRot = smoothedRot + offset;
						Vector2 dir = beamRot.ToRotationVector2();
						if (dir.HasNaNs()) dir = new Vector2(player.direction, 0f);
						dir = dir.SafeNormalize(new Vector2(player.direction, 0f));

						// Stagger spawn distance to create a whip chain illusion (front beams slightly further)
						float distance = 14f + 3f * i;
						Vector2 spawnPos = player.Center + dir * distance + new Vector2(0f, -4f);
						Vector2 velocity = dir * Item.shootSpeed * (1f + i * 0.05f); // slight incremental speed

						Projectile.NewProjectile(player.GetSource_ItemUse(Item), spawnPos, velocity,
							Item.shoot, beamDamage, Item.knockBack, player.whoAmI);
					}

					// Emit burst every 3 ticks to keep DPS reasonable while visually dense
					modPlayer.BeamEmissionTimer = 3;
				}
			}
		}
	}
}