using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;



public class PlayerSkills
{
    public event EventHandler OnSkillPointsChanged;
    public event EventHandler<OnSkillUnlockedEventArgs> OnSkillUnlocked;
    public class OnSkillUnlockedEventArgs : EventArgs
    {
        public SkillType skillType;
    }

    public enum SkillType
    {
        None,
        Punch,
        PunchC,
        PunchNC,
        Fireball,
        FireballC,
        FireballNc,
        Stun,
        StunC,
        StunNC,
        Def,
        DefC,
        DefNC,
        Pleh,
        PlehUp,
    }


    public List<SkillType> unlockedSkillTypeList;
    public int skillPoints;



    public PlayerSkills()
    {

        unlockedSkillTypeList = new List<SkillType>();

    }

    public void AddSkillPoints()
    {
        skillPoints++;
        OnSkillPointsChanged?.Invoke(this, EventArgs.Empty);
    }

    public int GetSkillPoints()
    {
        return skillPoints;
    }
    public void UnlockSkill(SkillType skillType)
    {
        if (!IsSkillUnlocked(skillType))
        {
            unlockedSkillTypeList.Add(skillType);
            OnSkillUnlocked?.Invoke(this, new OnSkillUnlockedEventArgs { skillType = skillType });
        }

    }


    public bool IsSkillUnlocked(SkillType skillType)
    {
        return unlockedSkillTypeList.Contains(skillType);
    }
    public SkillType GetSkillRequeriment (SkillType skillType)
    {
        switch (skillType) {
            case SkillType.PunchC: return SkillType.Punch;
            case SkillType.PunchNC: return SkillType.Punch;
            case SkillType.FireballC: return SkillType.Fireball;
            case SkillType.FireballNc: return SkillType.Fireball;
            case SkillType.StunC: return SkillType.Stun;
            case SkillType.StunNC: return SkillType.Stun;
            case SkillType.DefC: return SkillType.Def;
            case SkillType.DefNC: return SkillType.Def;
            case SkillType.PlehUp: return SkillType.Pleh;

        }
        return SkillType.None;

    }
    public bool CanUnlock(SkillType skillType)
    {
        SkillType skillRequiremente = GetSkillRequeriment(skillType);

        if (skillRequiremente != SkillType.None)
        {
            if (IsSkillUnlocked(skillRequiremente))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        else
        {
            return true;
        }
    }


    public bool TryUnlockSkill(SkillType skillType)
    {
        if (CanUnlock(skillType))
        {
            if (skillPoints > 0)
            {
                skillPoints--;
                OnSkillPointsChanged?.Invoke(this, EventArgs.Empty);
                UnlockSkill(skillType);
                return true;
            }
            else
            {
                return false;
            }


        }
        else
        {
            return false;
        }

    }

}