using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using PixelCrushers.DialogueSystem;
using UnityEngine.Events;

namespace Beyond
{
    public class QuestActivator : MonoBehaviour
    {
        [Serializable]
        public class ActivationCondition
        {
            public string questName;
            public QuestState state;
            public QuestState[] entriesStates;

        }

        public ActivationCondition[] m_conditions;
        public bool m_CheckOnStart = true;
        public bool m_debug = false;
        public UnityEvent m_OnTrueEvent;
        public UnityEvent m_OnFalseEvent;

        //TODO fix this
        public static bool QuestExists(string name)
        {
            var quest = QuestLog.GetAllQuests();
            foreach (var q in quest)
            {
                if (q.Equals(name))
                    return true;
            }
            return false;
        }

        public static bool CheckCondition(ActivationCondition condition)
        {
            /*
            if (!QuestExists(condition.questName))
            {
                Debug.LogError($"QuestActivator: Quest {condition.questName} doesn't exists!");
                return false;
            }
            */
            if (condition.state != 0 && !QuestLog.IsQuestInStateMask(condition.questName, condition.state))
                return false;
            int count = QuestLog.GetQuestEntryCount(condition.questName);
            count = count > condition.entriesStates.Length ? condition.entriesStates.Length : count;
            for (int i = 0; i < count ; i++)
            {
                if (condition.entriesStates[i] == 0)
                    continue;
                QuestState state = QuestLog.GetQuestEntryState(condition.questName, i + 1);
                if ((state & condition.entriesStates[i]) != state)
                    return false;
            }
            return true;
        }

        public void CheckCondition()
        {
            foreach (var c in m_conditions)
            {
                if (!CheckCondition(c))
                {
                    if (m_debug)
                        Debug.Log($"Condition for quest {c.questName} is false.");
                    m_OnFalseEvent?.Invoke();
                    return;
                }
            }
            if (m_debug)
            {
                foreach (var c in m_conditions)
                {
                    Debug.Log($"All conditions for quest {c.questName} are true.");
                }
            }
            if (m_conditions.Length > 0)
                m_OnTrueEvent?.Invoke();
        }
        
        void Start()
        {
            if (m_CheckOnStart)
            {
                CheckCondition();
            }
        }
    }
}