using System;
using System.Collections.Generic;
using Server.Gumps;
using Server.Network;

namespace Server.Engines.VeteranRewards
{
	public class RewardChoiceGump : Gump
	{
		private Mobile m_From;

		private void RenderBackground()
		{
			AddPage( 0 );

			AddBackground( 10, 10, 600, 450, 2600 );

			AddButton( 530, 415, 4017, 4019, 0, GumpButtonType.Reply, 0 );

			AddButton( 60, 415, 4014, 4016, 0, GumpButtonType.Page, 1 );
			AddHtmlLocalized( 95, 415, 200, 20, 1049755, false, false ); // Main Menu
		}

		private void RenderCategories()
		{
			TimeSpan rewardInterval = RewardSystem.RewardInterval;

			string intervalAsString;

			if ( rewardInterval == TimeSpan.FromDays( 30.0 ) )
				intervalAsString = "month";
			else if ( rewardInterval == TimeSpan.FromDays( 60.0 ) )
				intervalAsString = "two months";
			else if ( rewardInterval == TimeSpan.FromDays( 90.0 ) )
				intervalAsString = "three months";
			else if ( rewardInterval == TimeSpan.FromDays( 365.0 ) )
				intervalAsString = "year";
			else
				intervalAsString = $"{rewardInterval.TotalDays} day{(rewardInterval.TotalDays == 1 ? "" : "s")}";

			AddPage( 1 );

			AddHtml( 60, 35, 500, 70, "<B>Ultima Online Rewards Program</B><BR>" +
									"Thank you for being a part of the Ultima Online community for a full " + intervalAsString + ".  " +
									"As a token of our appreciation,  you may select from the following in-game reward items listed below.  " +
									"The gift items will be attributed to the character you have logged-in with on the shard you are on when you chose the item(s).  " +
									"The number of rewards you are entitled to are listed below and are for your entire account.  " +
									"To read more about these rewards before making a selection, feel free to visit the uo.com site at " +
									"<A HREF=\"http://www.uo.com/rewards\">http://www.uo.com/rewards</A>.", true, true );

			int cur, max;

			RewardSystem.ComputeRewardInfo( m_From, out cur, out max );

			AddHtmlLocalized( 60, 105, 300, 35, 1006006, false, false ); // Your current total of rewards to choose:
			AddLabel( 370, 107, 50, (max - cur).ToString() );

			AddHtmlLocalized( 60, 140, 300, 35, 1006007, false, false ); // You have already chosen:
			AddLabel( 370, 142, 50, cur.ToString() );

			RewardCategory[] categories = RewardSystem.Categories;

			int page = 2;

			for ( int i = 0; i < categories.Length; ++i )
			{
				if ( !RewardSystem.HasAccess( m_From, categories[i] ) )
				{
					page += 1;
					continue;
				}

				AddButton( 100, 180 + (i * 40), 4005, 4005, 0, GumpButtonType.Page, page );

				page += PagesPerCategory( categories[ i ] );

				if ( categories[i].NameString != null )
					AddHtml( 135, 180 + (i * 40), 300, 20, categories[i].NameString, false, false );
				else
					AddHtmlLocalized( 135, 180 + (i * 40), 300, 20, categories[i].Name, false, false );
			}

			page = 2;

			for ( int i = 0; i < categories.Length; ++i )
				RenderCategory( categories[ i ], i, ref page );
		}

		private int PagesPerCategory( RewardCategory category )
		{
			List<RewardEntry> entries = category.Entries;
			int j = 0, i = 0;

			for ( j = 0; j < entries.Count; j++ )
			{
				if ( RewardSystem.HasAccess( m_From, entries[ j ] ) )
					i++;
			}
			
			return (int) Math.Ceiling( i / 24.0 );
		}

		private int GetButtonID( int type, int index )
		{
			return 2 + (index * 20) + type;
		}

		private void RenderCategory( RewardCategory category, int index, ref int page )
		{
			AddPage( page );

			List<RewardEntry> entries = category.Entries;

			int i = 0;
			
			for ( int j = 0; j < entries.Count; ++j )
			{
				RewardEntry entry = entries[j];

				if ( !RewardSystem.HasAccess( m_From, entry ) )
					continue;

				if ( i == 24 )
				{
					AddButton( 305, 415, 0xFA5, 0xFA7, 0, GumpButtonType.Page, ++page );
					AddHtmlLocalized( 340, 415, 200, 20, 1011066, false, false ); // Next page

					AddPage( page );

					AddButton( 270, 415, 0xFAE, 0xFB0, 0, GumpButtonType.Page, page - 1 );
					AddHtmlLocalized( 185, 415, 200, 20, 1011067, false, false ); // Previous page

					i = 0;
				}

				AddButton( 55 + ((i / 12) * 250), 80 + ((i % 12) * 25), 5540, 5541, GetButtonID( index, j ), GumpButtonType.Reply, 0 );

				if ( entry.NameString != null )
					AddHtml( 80 + ((i / 12) * 250), 80 + ((i % 12) * 25), 250, 20, entry.NameString, false, false );
				else
					AddHtmlLocalized( 80 + ((i / 12) * 250), 80 + ((i % 12) * 25), 250, 20, entry.Name, false, false );
				++i;
			}

			page += 1;
		}

		public RewardChoiceGump( Mobile from ) : base( 0, 0 )
		{
			m_From = from;

			from.CloseGump( typeof( RewardChoiceGump ) );

			RenderBackground();
			RenderCategories();
		}

		public override void OnResponse( NetState sender, RelayInfo info )
		{
			int buttonID = info.ButtonID - 1;

			if ( buttonID == 0 )
			{
				int cur, max;

				RewardSystem.ComputeRewardInfo( m_From, out cur, out max );

				if ( cur < max )
					m_From.SendGump( new RewardNoticeGump( m_From ) );
			}
			else
			{
				--buttonID;

				int type = (buttonID % 20);
				int index = (buttonID / 20);

				RewardCategory[] categories = RewardSystem.Categories;

				if ( type >= 0 && type < categories.Length )
				{
					RewardCategory category = categories[type];

					if ( index >= 0 && index < category.Entries.Count )
					{
						RewardEntry entry = category.Entries[index];

						if ( !RewardSystem.HasAccess( m_From, entry ) )
							return;

						m_From.SendGump( new RewardConfirmGump( m_From, entry ) );
					}
				}
			}
		}
	}
}