﻿using System;
using System.Linq;
using LeagueSharp;
using LeagueSharp.Common;
using SharpDX;
using Yasuo.Evade;

namespace Yasuo
{
    public class YasuoEvade
    {
        public YasuoEvade()
        {
            SkillshotDetector.OnDetectSkillshot += Evade_OnDetectSkillshot;
            SkillshotDetector.OnDeleteMissile += Evade_OnDeleteMissile;
        }

        private static void Evade_OnDetectSkillshot(Skillshot skillshot)
        {
            //Check if the skillshot is already added.
            var alreadyAdded = false;

            foreach (var item in Yasuo.EvadeDetectedSkillshots)
            {
                if (item.SpellData.SpellName == skillshot.SpellData.SpellName &&
                    (item.Unit.NetworkId == skillshot.Unit.NetworkId &&
                     (skillshot.Direction).AngleBetween(item.Direction) < 5 &&
                     (skillshot.Start.Distance(item.Start) < 100 || skillshot.SpellData.FromObjects.Length == 0)))
                {
                    alreadyAdded = true;
                }
            }

            //Check if the skillshot is from an ally.
            if (skillshot.Unit.Team == ObjectManager.Player.Team)
            {
                return;
            }

            //Check if the skillshot is too far away.
            if (skillshot.Start.Distance(ObjectManager.Player.ServerPosition.To2D()) >
                (skillshot.SpellData.Range + skillshot.SpellData.Radius + 1000) * 1.5)
            {
                return;
            }

            //Add the skillshot to the detected skillshot list.
            if (!alreadyAdded)
            {
                //Multiple skillshots like twisted fate Q.
                if (skillshot.DetectionType == DetectionType.ProcessSpell)
                {
                    if (skillshot.SpellData.MultipleNumber != -1)
                    {
                        var originalDirection = skillshot.Direction;

                        for (var i = -(skillshot.SpellData.MultipleNumber - 1) / 2;
                            i <= (skillshot.SpellData.MultipleNumber - 1) / 2;
                            i++)
                        {
                            var end = skillshot.Start +
                                      skillshot.SpellData.Range *
                                      originalDirection.Rotated(skillshot.SpellData.MultipleAngle * i);
                            var skillshotToAdd = new Skillshot(
                                skillshot.DetectionType, skillshot.SpellData, skillshot.StartTick, skillshot.Start, end,
                                skillshot.Unit);

                            Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                        }
                        return;
                    }

                    if (skillshot.SpellData.SpellName == "UFSlash")
                    {
                        skillshot.SpellData.MissileSpeed = 1600 + (int)skillshot.Unit.MoveSpeed;
                    }

                    if (skillshot.SpellData.Invert)
                    {
                        var newDirection = -(skillshot.End - skillshot.Start).Normalized();
                        var end = skillshot.Start + newDirection * skillshot.Start.Distance(skillshot.End);
                        var skillshotToAdd = new Skillshot(
                            skillshot.DetectionType, skillshot.SpellData, skillshot.StartTick, skillshot.Start, end,
                            skillshot.Unit);
                        Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                        return;
                    }

                    if (skillshot.SpellData.Centered)
                    {
                        var start = skillshot.Start - skillshot.Direction * skillshot.SpellData.Range;
                        var end = skillshot.Start + skillshot.Direction * skillshot.SpellData.Range;
                        var skillshotToAdd = new Skillshot(
                            skillshot.DetectionType, skillshot.SpellData, skillshot.StartTick, start, end,
                            skillshot.Unit);
                        Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                        return;
                    }

                    if (skillshot.SpellData.SpellName == "SyndraE" || skillshot.SpellData.SpellName == "syndrae5")
                    {
                        const int angle = 60;
                        const int fraction = -angle / 2;
                        var edge1 =
                            (skillshot.End - skillshot.Unit.ServerPosition.To2D()).Rotated(
                                fraction * (float)Math.PI / 180);
                        var edge2 = edge1.Rotated(angle * (float)Math.PI / 180);

                        foreach (var minion in ObjectManager.Get<Obj_AI_Minion>())
                        {
                            var v = minion.ServerPosition.To2D() - skillshot.Unit.ServerPosition.To2D();
                            if (minion.Name == "Seed" && edge1.CrossProduct(v) > 0 && v.CrossProduct(edge2) > 0 &&
                                minion.Distance(skillshot.Unit) < 800 &&
                                (minion.Team != ObjectManager.Player.Team))
                            {
                                var start = minion.ServerPosition.To2D();
                                var end = skillshot.Unit.ServerPosition.To2D()
                                    .Extend(
                                        minion.ServerPosition.To2D(),
                                        skillshot.Unit.Distance(minion) > 200 ? 1300 : 1000);

                                var skillshotToAdd = new Skillshot(
                                    skillshot.DetectionType, skillshot.SpellData, skillshot.StartTick, start, end,
                                    skillshot.Unit);
                                Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                            }
                        }
                        return;
                    }

                    if (skillshot.SpellData.SpellName == "AlZaharCalloftheVoid")
                    {
                        var start = skillshot.End - skillshot.Direction.Perpendicular() * 400;
                        var end = skillshot.End + skillshot.Direction.Perpendicular() * 400;
                        var skillshotToAdd = new Skillshot(
                            skillshot.DetectionType, skillshot.SpellData, skillshot.StartTick, start, end,
                            skillshot.Unit);
                        Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                        return;
                    }

                    if (skillshot.SpellData.SpellName == "ZiggsQ")
                    {
                        var d1 = skillshot.Start.Distance(skillshot.End);
                        var d2 = d1 * 0.4f;
                        var d3 = d2 * 0.69f;


                        var bounce1SpellData = SpellDatabase.GetByName("ZiggsQBounce1");
                        var bounce2SpellData = SpellDatabase.GetByName("ZiggsQBounce2");

                        var bounce1Pos = skillshot.End + skillshot.Direction * d2;
                        var bounce2Pos = bounce1Pos + skillshot.Direction * d3;

                        bounce1SpellData.Delay =
                            (int)(skillshot.SpellData.Delay + d1 * 1000f / skillshot.SpellData.MissileSpeed + 500);
                        bounce2SpellData.Delay =
                            (int)(bounce1SpellData.Delay + d2 * 1000f / bounce1SpellData.MissileSpeed + 500);

                        var bounce1 = new Skillshot(
                            skillshot.DetectionType, bounce1SpellData, skillshot.StartTick, skillshot.End, bounce1Pos,
                            skillshot.Unit);
                        var bounce2 = new Skillshot(
                            skillshot.DetectionType, bounce2SpellData, skillshot.StartTick, bounce1Pos, bounce2Pos,
                            skillshot.Unit);

                        Yasuo.EvadeDetectedSkillshots.Add(bounce1);
                        Yasuo.EvadeDetectedSkillshots.Add(bounce2);
                    }

                    if (skillshot.SpellData.SpellName == "ZiggsR")
                    {
                        skillshot.SpellData.Delay =
                            (int)(1500 + 1500 * skillshot.End.Distance(skillshot.Start) / skillshot.SpellData.Range);
                    }

                    if (skillshot.SpellData.SpellName == "JarvanIVDragonStrike")
                    {
                        var endPos = new Vector2();

                        foreach (var s in Yasuo.EvadeDetectedSkillshots)
                        {
                            if (s.Unit.NetworkId == skillshot.Unit.NetworkId && s.SpellData.Slot == SpellSlot.E)
                            {
                                endPos = s.End;
                            }
                        }

                        foreach (var m in ObjectManager.Get<Obj_AI_Minion>())
                        {
                            if (m.BaseSkinName == "jarvanivstandard" && m.Team == skillshot.Unit.Team &&
                                skillshot.IsDanger(m.Position.To2D()))
                            {
                                endPos = m.Position.To2D();
                            }
                        }

                        if (!endPos.IsValid())
                        {
                            return;
                        }

                        skillshot.End = endPos + 200 * (endPos - skillshot.Start).Normalized();
                        skillshot.Direction = (skillshot.End - skillshot.Start).Normalized();
                    }
                }

                if (skillshot.SpellData.SpellName == "OriannasQ")
                {
                    var endCSpellData = SpellDatabase.GetByName("OriannaQend");

                    var skillshotToAdd = new Skillshot(
                        skillshot.DetectionType, endCSpellData, skillshot.StartTick, skillshot.Start, skillshot.End,
                        skillshot.Unit);

                    Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                }


                //Dont allow fow detection.
                if (skillshot.SpellData.DisableFowDetection && skillshot.DetectionType == DetectionType.RecvPacket)
                {
                    return;
                }

                Yasuo.EvadeDetectedSkillshots.Add(skillshot);
            }
        }

        private static void Evade_OnDeleteMissile(Skillshot skillshot, Obj_SpellMissile missile)
        {
            if (skillshot.SpellData.SpellName == "VelkozQ")
            {
                var spellData = SpellDatabase.GetByName("VelkozQSplit");
                var direction = skillshot.Direction.Perpendicular();
                if (Yasuo.EvadeDetectedSkillshots.Count(s => s.SpellData.SpellName == "VelkozQSplit") == 0)
                {
                    for (var i = -1; i <= 1; i = i + 2)
                    {
                        var skillshotToAdd = new Skillshot(
                            DetectionType.ProcessSpell, spellData, Environment.TickCount, missile.Position.To2D(),
                            missile.Position.To2D() + i * direction * spellData.Range, skillshot.Unit);
                        Yasuo.EvadeDetectedSkillshots.Add(skillshotToAdd);
                    }
                }
            }
        }
    }
}