using System;
using System.Collections;
using Server;
using Server.Network;

namespace Server.Items
{
	public class BaseShield : BaseArmor
	{
		public override ArmorMaterialType MaterialType{ get{ return ArmorMaterialType.Plate; } }

		public BaseShield( int itemID ) : base( itemID )
		{
		}

		public BaseShield( Serial serial ) : base(serial)
		{
		}

		public override void Serialize( GenericWriter writer )
		{
			base.Serialize( writer );

			writer.Write( (int) 1 );//version
		}

		public override void Deserialize( GenericReader reader )
		{
			base.Deserialize( reader );

			int version = reader.ReadInt();
		}

		public override double ArmorRating
		{
			get
			{
				Mobile m = this.Parent as Mobile;
				double ar = base.ArmorRating;

				if ( m != null )
					return ( ( m.Skills[SkillName.Parry].Value * ar ) / 200.0 ) + 1.0;
				else
					return ar;
			}
		}

		public override int OnHit( BaseWeapon weapon, int damage )
		{
			Mobile owner = this.Parent as Mobile;
			if( owner == null )
				return damage;

			double ar = this.ArmorRating;
			double chance = (owner.Skills[SkillName.Parry].Value - (ar * 2.0)) / 100.0;

			if( chance < 0.01 )
				chance = 0.01;
			/*
			FORMULA: Displayed AR = ((Parrying Skill * Base AR of Shield) ÷ 200) + 1 

			FORMULA: % Chance of Blocking = parry skill - (shieldAR * 2)

			FORMULA: Melee Damage Absorbed = (AR of Shield) / 2 | Archery Damage Absorbed = AR of Shield 
			*/
			if( owner.CheckSkill( SkillName.Parry, chance ) )
			{
				if( weapon.Skill == SkillName.Archery )
					damage -= (int)ar;
				else
					damage -= (int)(ar / 2.0);

				if( damage < 0 )
					damage = 0;

				owner.FixedEffect( 0x37B9, 10, 16 );

				if( 25 > Utility.Random( 100 ) ) // 25% chance to lower durability
				{
					int wear = Utility.Random( 2 );

					if( wear > 0 && MaxHitPoints > 0 )
					{
						if( HitPoints >= wear )
						{
							HitPoints -= wear;
							wear = 0;
						}
						else
						{
							wear -= HitPoints;
							HitPoints = 0;
						}

						if( wear > 0 )
						{
							if( MaxHitPoints > wear )
							{
								MaxHitPoints -= wear;

								if( Parent is Mobile )
									((Mobile)Parent).LocalOverheadMessage( MessageType.Regular, 0x3B2, 1061121 ); // Your equipment is severely damaged.
							}
							else
							{
								Delete();
							}
						}
					}
				}
			}

			return damage;
		}
	}
}