//! zinc
library PirateHunter requires TimerUtils,Status,GroupUtils,Projectile,AIDS{

    private{
        constant integer ABIL_ID = 'A0K6';
        unit Current_Target[8191];
    }

    struct data{
        unit hunter;
    }

    struct attack{
        unit attacker;
    }

    function GetUnitZ(unit whichUnit)->real{
        location l=Location(GetUnitX(whichUnit),GetUnitY(whichUnit));
        real p=GetLocationZ(l)+GetUnitFlyHeight(whichUnit);
        RemoveLocation(l);
        l=null;
        return p;
    }

    function OnUnitImpact(projectile p,unit u){
        if (u==p.targetUnit){
            UnitDamageTargetEx(p.sourceUnit,u,p.damageDealt,false,true,ATTACK_TYPE_CHAOS,DAMAGE_TYPE_FORCE,WEAPON_TYPE_WHOKNOWS);
            p.terminate();
            p.removeUnit(u);
        }
    }

    function OnExpireFunc(projectile p){
        if (!p.isUnitAdded(p.targetUnit)&&IsUnitInRangeXY(p.targetUnit,p.posX,p.posY,p.unitHitRadius)){OnUnitImpact(p,p.targetUnit);}
    }

    function createProjectile(unit whichUnit,unit target,real damage){
        projectile p=0;
        real a=Atan2(GetUnitY(target)-GetUnitY(whichUnit),GetUnitX(target)-GetUnitX(whichUnit));
        p=projectile.create(GetUnitX(whichUnit),GetUnitY(whichUnit),GetUnitFlyHeight(whichUnit)+50.00+GetUnitZ(whichUnit),a);
        p.sourceUnit=whichUnit;
        p.owningPlayer=GetOwningPlayer(whichUnit);
        p.effectPath="Abilities\\Weapons\\BoatMissile\\BoatMissile.mdl";
        p.damageDealt=damage;
        p.scaleSize=1.0;
        p.zOffset=50.0;
        p.allowDeathSfx=true;
        p.allowTargetHoming=true;
        p.onUnit   = OnUnitImpact;
        p.onExpire = OnExpireFunc;
        p.projectNormal(GetUnitX(target),GetUnitY(target),50.00+GetUnitZ(whichUnit),1100.0);
    }

    function onTimer(){
        timer t=GetExpiredTimer();
        data this=GetTimerData(t);
        player p=GetOwningPlayer(this.hunter);
        real d=BlzGetUnitBaseDamage(this.hunter,1)+BlzGetUnitDiceNumber(this.hunter,1)+Status[this.hunter].getDamageBonus();
        real s=BlzGetUnitAttackCooldown(this.hunter,1);
        string tt="|c00eac117Cannon Damage: |r"+I2S(R2I(d))+"|n|c00eac117Reload Speed: |r"+R2S(s)+"|n|n|c00eac117Passive:|r Fire a cannon at a nearby enemy within a 600 radius.|n|n|c00eac117Active:|r Locks a cannon onto a selected target.|n|n|c00ff0000Cooldown:|r 5";
        if (GetUnitState(this.hunter,UNIT_STATE_LIFE)>0.405){
            if (GetLocalPlayer()==p){BlzSetAbilityExtendedTooltip(ABIL_ID,tt,1);}
        }
        p=null;
    }

    function engageAttack(){
        timer t=GetExpiredTimer();
        attack that=GetTimerData(t);
        integer i=GetUnitId(that.attacker);
        unit n;
        group g=NewGroup();
        real d=BlzGetUnitBaseDamage(that.attacker,1)+BlzGetUnitDiceNumber(that.attacker,1)+Status[that.attacker].getDamageBonus();
        real s=BlzGetUnitAttackCooldown(that.attacker,1);
        if (GetUnitState(that.attacker,UNIT_STATE_LIFE)>0.405){
            if (Current_Target[i]!=null&&IsUnitInRange(Current_Target[i],that.attacker,600.00)){
                createProjectile(that.attacker,Current_Target[i],d);}
            else{
                Current_Target[i]=null;
                GroupUnitsInArea(g,GetUnitX(that.attacker),GetUnitY(that.attacker),600.0);
                n=FirstOfGroup(g);
                while (n!=null){
                    if (!IsUnitInGroup(n,TitanGroup)){
                        GroupRemoveUnit(g,n);
                    }
                    n=FirstOfGroup(g);
                }
                Current_Target[i]=GroupPickRandomUnit(g);
                createProjectile(that.attacker,Current_Target[i],d);
            }
        }
        TimerStart(t,s,false,function engageAttack);
        SetTimerData(t,that);
        ReleaseGroup(g);
        n=null;
        t=null;
        g=null;
    }

    function registerHunter(unit whichUnit){
        data this=data.create();
        attack that=attack.create();
        timer t=NewTimer();
        this.hunter=whichUnit;
        that.attacker=whichUnit;
        TimerStart(t,0.04,true,function onTimer);
        SetTimerData(t,this);
        t=NewTimer();
        TimerStart(t,BlzGetUnitAttackCooldown(whichUnit,1),false,function engageAttack);
        SetTimerData(t,that);
        t=null;
    }

    function onInit(){registerHunter(gg_unit_H046_0203);}
}
//! endzinc