using System;
using System.Collections.Generic;
using System.Linq;
namespace Socer;

public sealed partial class MatchSimulation
{
    public bool AutomaticStrategiesEnabled=true;
    public List<StrategyPlan> AutomaticStrategies {get;private set;}=new();
    public int AutomaticStrategyStarts;
    public float AutomaticStrategyReadyAt;
    float nextAutomaticStrategyCheck;
    readonly Dictionary<string,float> strategyLastUsed=new();

    public void SetAutomaticStrategies(IEnumerable<StrategyPlan> plans)
        =>AutomaticStrategies=plans.Where(p=>p!=null && p.Validate()=="").Select(p=>p.Copy()).ToList();

    bool HasPersonalOrder(Footballer p)=>p.DirectOrder!=DirectOrderKind.None && Seconds<p.DirectOrderUntil;

    float AutomaticStrategyFit(StrategyPlan plan,Footballer carrier)
    {
        if(!plan.Phases.Any(f=>f.Action!=2))return 0;
        var first=plan.Phases[0];var anchor=World(carrier.Position,carrier.Team);
        var offset=anchor-plan.Start[first.Actor].Point();
        // Preserve the intended part of the pitch and flank. Do not translate a wing
        // routine into our penalty area or clamp its runs into the touchline.
        if(anchor.X<38 || Math.Abs(offset.X)>24 || Math.Abs(offset.Y)>14)return 0;
        bool Inside(Point v)=>v.X>=1 && v.X<=104 && v.Y>=1 && v.Y<=67;
        if(plan.Start.Any(s=>!Inside(s.Point()+offset)) || plan.Phases.Any(f=>
            (f.PassZone!=null && !Inside(f.PassZone.Point()+offset)) ||
            f.Routes.Any(r=>r.Points.Any(s=>!Inside(s.Point()+offset)))))return 0;
        if(!BindStrategyActors(plan,carrier.Team,false,out var actors,out _))return 0;
        float total=0;
        for(int role=0;role<5;role++)
        {
            var p=Players[actors[role]];
            if(HasPersonalOrder(p) || p.Stamina<.25f || p.Recovery>.1f)return 0;
            float mismatch=(World(p.Position,p.Team)-plan.Start[role].Point()-offset).Length;
            if(mismatch>24)return 0;total+=mismatch;
        }
        if(total/5>13)return 0;
        if(first.Action==0)
        {
            var receiver=Players[actors[first.Receiver]];
            var target=first.PassZone!=null?World(first.PassZone.Point()+offset,carrier.Team):receiver.Position;
            if(!SeesPartner(carrier,receiver) || !IsOnside(receiver,carrier.Position) ||
                (target-carrier.Position).Length>40 || PerceivedLane(carrier,target)<(first.Delivery==2?.5f:1.4f))return 0;
        }
        if(first.Action==1 && ((World(new Point(105,34),carrier.Team)-carrier.Position).Length>28 ||
            PerceivedLane(carrier,World(new Point(105,34),carrier.Team),true)<1))return 0;
        return Math.Clamp(1-total/85-Math.Abs(offset.X)/100-Math.Abs(offset.Y)/70,.15f,1);
    }

    bool TryAutomaticStrategy(Footballer carrier)
    {
        if(!AutomaticStrategiesEnabled || AutomaticStrategies.Count==0 || StrategyWalkthrough ||
            carrier.Team!=0 || Owner!=carrier.Id || carrier.Keeper || carrier.Held<.45f || !BallAtFoot(carrier) ||
            Finished || RestartRemaining>0 || IncidentRemaining>0 || GoalHoldRemaining>0 || WindupPlayer>=0 ||
            (Strategy!=null && !Strategy.Done) || HasPersonalOrder(carrier) ||
            Seconds<AutomaticStrategyReadyAt || Seconds<nextAutomaticStrategyCheck)return false;
        nextAutomaticStrategyCheck=Seconds+2.5f+Next()*2.5f;
        if(CarrierPressure(carrier)<2 || Next()>.3f+carrier.Profile.Vision*.22f)return false;
        var options=AutomaticStrategies.Select(plan=>new {Plan=plan,Fit=AutomaticStrategyFit(plan,carrier)})
            .Where(x=>x.Fit>0).Select(x=>new {x.Plan,Weight=x.Fit*(strategyLastUsed.TryGetValue(x.Plan.Name,out var last) && Seconds-last<75?.22f:1)})
            .ToArray();
        float total=options.Sum(x=>x.Weight);if(total<=0)return false;
        float pick=Next()*total;var chosen=options[^1].Plan;
        foreach(var option in options){pick-=option.Weight;if(pick<=0){chosen=option.Plan;break;}}
        if(!StartStrategy(chosen))return false;
        AutomaticStrategyStarts++;
        AutomaticStrategyReadyAt=Seconds+24+Next()*12;
        Strategy.Status="Авто · "+chosen.Name;
        Strategy.Events.Add("Инициатива игроков");
        Status=TeamName(0)+" · разыгрывают «"+chosen.Name+"»";
        AddEvent(Status);Say(carrier,"По схеме!",true);
        return true;
    }
}