using System;
using System.Collections.Generic;

namespace Server.Multis
{
    public class DynamicDecay
    {
        private static readonly Dictionary<DecayLevel, DecayStageInfo> m_Stages;
        static DynamicDecay()
        {
            m_Stages = new Dictionary<DecayLevel, DecayStageInfo>();

            Register(DecayLevel.LikeNew, TimeSpan.FromHours(1), TimeSpan.FromHours(1));
            Register(DecayLevel.Slightly, TimeSpan.FromDays(1), TimeSpan.FromDays(2));
            Register(DecayLevel.Somewhat, TimeSpan.FromDays(1), TimeSpan.FromDays(2));
            Register(DecayLevel.Fairly, TimeSpan.FromDays(1), TimeSpan.FromDays(2));
            Register(DecayLevel.Greatly, TimeSpan.FromDays(1), TimeSpan.FromDays(2));
            Register(DecayLevel.IDOC, TimeSpan.FromHours(12), TimeSpan.FromHours(24));
        }

        public static bool Enabled => true;
        public static void Register(DecayLevel level, TimeSpan min, TimeSpan max)
        {
            DecayStageInfo info = new DecayStageInfo(min, max);

            if (m_Stages.ContainsKey(level))
                m_Stages[level] = info;
            else
                m_Stages.Add(level, info);
        }

        public static bool Decays(DecayLevel level)
        {
            return m_Stages.ContainsKey(level);
        }

        public static TimeSpan GetRandomDuration(DecayLevel level)
        {
            if (!m_Stages.ContainsKey(level))
                return TimeSpan.Zero;

            DecayStageInfo info = m_Stages[level];
            long min = info.MinDuration.Ticks;
            long max = info.MaxDuration.Ticks;

            return TimeSpan.FromTicks(min + (long)(Utility.RandomDouble() * (max - min)));
        }
    }

    public class DecayStageInfo
    {
        private readonly TimeSpan m_MinDuration;
        private readonly TimeSpan m_MaxDuration;
        public DecayStageInfo(TimeSpan min, TimeSpan max)
        {
            m_MinDuration = min;
            m_MaxDuration = max;
        }

        public TimeSpan MinDuration => m_MinDuration;
        public TimeSpan MaxDuration => m_MaxDuration;
    }
}