using GameClass.GameObj;
using System.Threading;
using Preparation.Interface;
using Preparation.Utility;
using System;
using Timothy.FrameRateTask;

namespace GameClass.Skill
{
    public class BecomeVampire : IActiveSkill  // 化身吸血鬼
    {
        public int SkillCD => GameData.commonSkillCD / 3 * 4;
        public int DurationTime => GameData.commonSkillTime;

        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;

        public bool SkillEffect(Map map, Character player)
        {
            return ActiveSkillFactory.SkillEffect(this, player, () =>
            {
                player.Vampire += 0.5;
                Debugger.Output(player, "becomes vampire!");
            },
                                                  () =>
                                                  {
                                                      double tempVam = player.Vampire - 0.5;
                                                      player.Vampire = tempVam < player.OriVampire ? player.OriVampire : tempVam;
                                                  });
        }
    }

    public class BeginToCharge : IActiveSkill
    {
        public int SkillCD => GameData.commonSkillCD / 3 * 4;
        public int DurationTime => GameData.commonSkillTime;

        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;

        public bool SkillEffect(Map map, Character player)
        {
            return ActiveSkillFactory.SkillEffect(this, player, () =>
            {
                player.Vampire += 0.5;
                Debugger.Output(player, "becomes vampire!");
            },
                                                  () =>
                                                  {
                                                      double tempVam = player.Vampire - 0.5;
                                                      player.Vampire = tempVam < player.OriVampire ? player.OriVampire : tempVam;
                                                  });
        }
    }
    public class BecomeInvisible : IActiveSkill
    {
        public int SkillCD => GameData.commonSkillCD;
        public int DurationTime => GameData.commonSkillTime / 10 * 6;

        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;
        public bool SkillEffect(Map map, Character player)
        {
            return ActiveSkillFactory.SkillEffect(this, player, () =>
            {
                player.IsInvisible = true;
                Debugger.Output(player, "uses atombomb!");
            },
                                                  () =>
                                                  { player.IsInvisible = false; });
        }
    }
    public class NuclearWeapon : IActiveSkill  // 核武器
    {
        public int SkillCD => GameData.commonSkillCD / 3 * 7;
        public int DurationTime => GameData.commonSkillTime / 10;
        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;
        public bool SkillEffect(Map map, Character player)
        {
            return ActiveSkillFactory.SkillEffect(this, player, () =>
            {
                player.BulletOfPlayer = BulletType.AtomBomb;
                Debugger.Output(player, "uses atombomb!");
            },
                                                  () =>
                                                  { player.BulletOfPlayer = player.OriBulletOfPlayer; });
        }
    }
    public class UseKnife : IActiveSkill
    {
        public int SkillCD => GameData.commonSkillCD / 3 * 2;
        public int DurationTime => GameData.commonSkillTime / 10;
        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;
        public bool SkillEffect(Map map, Character player)
        {
            return ActiveSkillFactory.SkillEffect(this, player, () =>
            {
                player.BulletOfPlayer = BulletType.FlyingKnife;
                Debugger.Output(player, "uses flyingknife!");
            },
                                                  () =>
                                                  { player.BulletOfPlayer = player.OriBulletOfPlayer; });
        }
    }
    public class SuperFast : IActiveSkill  // 3倍速
    {
        public int SkillCD => GameData.commonSkillCD;
        public int DurationTime => GameData.commonSkillTime / 10 * 4;
        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;
        public bool SkillEffect(Map map, Character player)
        {
            return ActiveSkillFactory.SkillEffect(this, player, () =>
            {
                player.AddMoveSpeed(this.DurationTime, 3.0);
                Debugger.Output(player, "moves very fast!");
            },
                                                  () =>
                                                  { });
        }
    }
    public class NoCommonSkill : IActiveSkill  // 这种情况不该发生，定义着以防意外
    {
        public int SkillCD => GameData.commonSkillCD;
        public int DurationTime => GameData.commonSkillTime;
        private readonly object commonSkillLock = new object();
        public object ActiveSkillLock => commonSkillLock;
        public bool SkillEffect(Map map, Character player)
        {
            return false;
        }
    }

    public static class ActiveSkillFactory
    {
        public static bool SkillEffect(IActiveSkill activeSkill, Character player, Action startSkill, Action endSkill)
        {
            lock (activeSkill.ActiveSkillLock)
            {
                ActiveSkillType activeSkillType = FindActiveSkillType(activeSkill);
                if (player.TimeUntilActiveSkillAvailable[activeSkillType] == 0)
                {

                    player.SetTimeUntilActiveSkillAvailable(activeSkillType, activeSkill.SkillCD);
                    new Thread
                    (() =>
                    {
                        startSkill();
                        new FrameRateTaskExecutor<int>(
                            () => !player.IsResetting,
                            () =>
                            {
                                player.AddTimeUntilActiveSkillAvailable(activeSkillType, -(int)GameData.frameDuration);
                            },
                            timeInterval: GameData.frameDuration,
                            () => 0,
                            maxTotalDuration: (long)(activeSkill.DurationTime)
                        )
                        {
                            AllowTimeExceed = true,
                            MaxTolerantTimeExceedCount = ulong.MaxValue,
                        }
                            .Start();

                        endSkill();
                        Debugger.Output(player, "return to normal.");

                        new FrameRateTaskExecutor<int>(
                            () => player.TimeUntilActiveSkillAvailable[activeSkillType] > 0 && !player.IsResetting,
                            () =>
                            {
                                player.AddTimeUntilActiveSkillAvailable(activeSkillType, -(int)GameData.frameDuration);
                            },
                            timeInterval: GameData.frameDuration,
                            () => 0,
                            maxTotalDuration: (long)(activeSkill.SkillCD - activeSkill.DurationTime)
                        )
                        {
                            AllowTimeExceed = true,
                            MaxTolerantTimeExceedCount = ulong.MaxValue,
                        }
                            .Start();

                        player.SetTimeUntilActiveSkillAvailable(activeSkillType, 0);
                        Debugger.Output(player, "CommonSkill is ready.");
                    }
                    )
                    { IsBackground = true }.Start();

                    return true;
                }
                else
                {
                    Debugger.Output(player, "CommonSkill is cooling down!");
                    return false;
                }
            }
        }
        public static IActiveSkill? FindIActiveSkill(ActiveSkillType activeSkillType)
        {
            switch (activeSkillType)
            {
                case ActiveSkillType.BecomeInvisible:
                    return new BecomeInvisible();
                default:
                    return null;
            }
        }
        public static ActiveSkillType FindActiveSkillType(IActiveSkill ActiveSkill)
        {
            switch (ActiveSkill)
            {
                case BecomeInvisible:
                    return ActiveSkillType.BecomeInvisible;
                case UseKnife:
                    return ActiveSkillType.UseKnife;
                case BeginToCharge:
                    return ActiveSkillType.BeginToCharge;
                default:
                    return ActiveSkillType.Null;
            }
        }
    }

}