using System;
using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;

namespace ExampleMod.NPCs.Abomination
{
	public class FreedElement : ModNPC
	{
		private int elementType
		{
			get
			{
				return (int)npc.ai[0];
			}
			set
			{
				npc.ai[0] = value;
			}
		}

		private int chargeTimer
		{
			get
			{
				return (int)npc.ai[1];
			}
			set
			{
				npc.ai[1] = value;
			}
		}

		private float chargeX
		{
			get
			{
				return npc.ai[2];
			}
			set
			{
				npc.ai[2] = value;
			}
		}

		private float chargeY
		{
			get
			{
				return npc.ai[3];
			}
			set
			{
				npc.ai[3] = value;
			}
		}

		public override string Texture
		{
			get
			{
				return "ExampleMod/NPCs/Abomination/CaptiveElement2";
			}
		}

		public override void SetStaticDefaults()
		{
			DisplayName.SetDefault("Freed Element");
			Main.npcFrameCount[npc.type] = 5;
		}

		public override void SetDefaults()
		{
			npc.aiStyle = -1;
			npc.lifeMax = 15000;
			npc.damage = 100;
			npc.defense = 55;
			npc.knockBackResist = 0f;
			npc.dontTakeDamage = true;
			npc.alpha = 255;
			npc.width = 50;
			npc.height = 50;
			npc.value = Item.buyPrice(0, 20, 0, 0);
			npc.npcSlots = 5f;
			npc.boss = true;
			npc.lavaImmune = true;
			npc.noGravity = true;
			npc.noTileCollide = true;
			npc.HitSound = SoundID.NPCHit5;
			npc.DeathSound = SoundID.NPCDeath7;
			music = MusicID.Boss2;
		}

		public override void ScaleExpertStats(int numPlayers, float bossLifeScale)
		{
			npc.lifeMax = (int)(npc.lifeMax * 0.6f * bossLifeScale);
			npc.damage = (int)(npc.damage * 0.6f);
		}

		public override void AI()
		{
			if (npc.localAI[0] == 0f)
			{
				if (elementType == 0)
				{
					npc.coldDamage = true;
				}
				if (elementType == 2)
				{
					npc.damage += 20;
				}
				npc.localAI[0] = 1f;
			}
			if (NPC.AnyNPCs(mod.NPCType("CaptiveElement2")))
			{
				if (npc.timeLeft < 750)
				{
					npc.timeLeft = 750;
				}
			}
			else
			{
				npc.life = -1;
				npc.active = false;
				return;
			}
			chargeTimer--;
			if (chargeTimer <= 0)
			{
				npc.TargetClosest(false);
				Player player = Main.player[npc.target];
				Vector2 offset = player.Center - npc.Center;
				if (offset != Vector2.Zero)
				{
					offset.Normalize();
				}
				offset *= 12f;
				chargeX = offset.X;
				chargeY = offset.Y;
				chargeTimer = 150;
				npc.netUpdate = true;
			}
			else if (chargeTimer <= 30)
			{
				chargeX = 0;
				chargeY = 0;
			}
			npc.velocity = (99f * npc.velocity + new Vector2(chargeX, chargeY)) / 100f;
			CreateDust();
		}

		private void CreateDust()
		{
			Color? color = GetColor();
			if (color.HasValue)
			{
				for (int k = 0; k < 5; k++)
				{
					int dust = Dust.NewDust(npc.position, npc.width, npc.height, mod.DustType("Pixel"), 0f, 0f, 0, color.Value);
					double angle = Main.rand.NextDouble() * 2.0 * Math.PI;
					Main.dust[dust].velocity = 3f * new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle));
				}
			}
			else
			{
				for (int k = 0; k < 1; k++)
				{
					int dust = Dust.NewDust(npc.position, npc.width, npc.height, mod.DustType("Bubble"), 0f, 0f, 0);
					double angle = Main.rand.NextDouble() * 2.0 * Math.PI;
					Main.dust[dust].velocity = 2f * new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle));
				}
			}
		}

		public override bool PreNPCLoot()
		{
			return false;
		}

		public override bool CanHitPlayer(Player target, ref int cooldownSlot)
		{
			if (elementType == 2 && Main.expertMode)
			{
				cooldownSlot = 1;
			}
			return true;
		}

		public override void OnHitPlayer(Player player, int dmgDealt, bool crit)
		{
			if (Main.expertMode || Main.rand.Next(2) == 0)
			{
				int debuff = GetDebuff();
				if (debuff >= 0)
				{
					player.AddBuff(debuff, GetDebuffTime(), true);
				}
			}
		}

		public int GetDebuff()
		{
			switch (elementType)
			{
				case 0:
					return BuffID.Frostburn;
				case 1:
					return BuffID.Frostburn;//BuffDef.byName["Bluemagic:EtherealFlames"];
				case 3:
					return BuffID.Venom;
				case 4:
					return BuffID.Ichor;
				default:
					return -1;
			}
		}

		public int GetDebuffTime()
		{
			int time;
			switch (elementType)
			{
				case 0:
					time = 400;
					break;
				case 1:
					time = 400;//300;
					break;
				case 3:
					time = 400;
					break;
				case 4:
					time = 600;
					break;
				default:
					return -1;
			}
			return time;
		}

		public Color? GetColor()
		{
			switch (elementType)
			{
				case 0:
					return new Color(0, 230, 230);
				case 1:
					return new Color(0, 153, 230);
				case 3:
					return new Color(0, 178, 0);
				case 4:
					return new Color(230, 192, 0);
				default:
					return null;
			}
		}
	}
}