using System;
using System.Collections.Generic;
using System.Linq;

namespace Babushka.scripts.CSharp.Common.Fight;

public static class FightUtils
{
    public static IEnumerable<FightWorld.Fighter> WhereIsAlive(this IEnumerable<FightWorld.Fighter> self)
    {
        return self.Where(e => e.IsAlive());
    }

    public static IEnumerable<FightWorld.Fighter> WhereIsNotInFormation(this IEnumerable<FightWorld.Fighter> self,
        FighterFormation formation)
    {
        return self.Where(e => !e.IsInFormation(formation));
    }

    public static bool IsAlive(this FightWorld.Fighter self)
    {
        return self.Health > 0;
    }

    public static bool IsDead(this FightWorld.Fighter self)
    {
        return !self.IsAlive();
    }

    /// <summary>
    /// Changes the health of a fighter
    /// </summary>
    /// <param name="self">The fighter itself</param>
    /// <param name="amount">The amount of health to add. Make negative to remove health</param>
    public static void ChangeHealth(this FightWorld.Fighter self, int amount)
    {
        self.Health += amount;
    }

    public static bool IsInFormation(this FightWorld.Fighter self, FighterFormation formation)
    {
        return formation.ContainsFighter(self);
    }

    public static bool AreAllDead(this FightWorld.FighterGroup self)
    {
        return self.fighters.All(e => e.IsDead());
    }
}