using Decimation.Content.Tiles.ShrineoftheMoltenOne;
using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;

namespace Decimation.Content.NPCs
{
    // Check  line 43861 of NPC.cs
    internal class CoreSpiderWall : ModNPC
    {
        private int frame;
        private readonly int shootFrame = 120;

        public override void SetStaticDefaults()
        {
            DisplayName.SetDefault("Core Spider");
            Main.npcFrameCount[npc.type] = 4;
        }

        public override void SetDefaults()
        {
            npc.CloneDefaults(NPCID.BlackRecluseWall);
            npc.width = 60;
            npc.height = 62;
            npc.lifeMax = 750;
            animationType = NPCID.BlackRecluseWall;

            npc.lavaImmune = true;
            npc.buffImmune[BuffID.OnFire] = true;
            npc.buffImmune[BuffID.Burning] = true;
        }

        public override void AI()
        {
            int x = (int) npc.Center.X / 16;
            int y = (int) npc.Center.Y / 16;
            bool onWall = true;
            for (int i = x - 1; i <= x + 1; i++)
            for (int j = y - 1; j <= y + 1; j++)
                if (Main.tile[i, j].wall <= 0)
                    onWall = false;

            if (Main.expertMode)
            {
                if (frame >= shootFrame)
                {
                    if (Main.rand.Next(3) == 0)
                    {
                        Vector2 mouthPos = npc.Center + new Vector2(npc.width / 2f, 0).RotatedBy(npc.rotation);
                        Vector2 projSpeed = new Vector2(5, 0).RotatedBy(npc.rotation);

                        Projectile.NewProjectile(mouthPos, projSpeed, ProjectileID.Fireball, 130, 30);
                    }

                    frame = 0;
                }
                else
                {
                    frame++;
                }
            }

            if (!onWall)
                npc.Transform(ModContent.NPCType<CoreSpider>());
            else
                base.AI();
        }

        public override bool CheckConditions(int left, int right, int top, int bottom)
        {
            int x = (int) Main.LocalPlayer.position.X / 16;
            int y = (int) Main.LocalPlayer.position.Y / 16;

            int validBlockCount = 0;
            for (int i = (int) (-50 + x / 16f); i <= (int) (50 + x / 16f); i++)
            for (int j = (int) (-50 + y / 16f); j <= (int) (50 + y / 16f); j++)
                if (i >= 0 && i <= Main.maxTilesX && j >= 0 && j <= Main.maxTilesY)
                    if (Main.tile[i, j].type == ModContent.TileType<ShrineBrick>() ||
                        Main.tile[i, j].type == ModContent.TileType<LockedShrineDoor>() ||
                        Main.tile[i, j].type == ModContent.TileType<ShrineDoorClosed>() ||
                        Main.tile[i, j].type == ModContent.TileType<ShrineDoorOpened>() ||
                        Main.tile[i, j].type == ModContent.TileType<RedHotSpike>())
                        validBlockCount++;

            return validBlockCount >= 15 && Main.hardMode;
        }
    }
}