using UnityEngine;
using System.Collections.Generic;

[System.Serializable]
public class Quest
{
    public string questName;
    public string questDescription;
    public int requiredLevel;
    public int rewardGold;
    public int rewardExperience;
    public int requiredQuantity;
    public string[] prerequisiteNames; // Store quest names instead of direct references
}

public class Quests : MonoBehaviour
{
    [SerializeField] private List<Quest> completedQuests = new List<Quest>();
    [SerializeField] private List<Quest> activeQuests = new List<Quest>();
    [SerializeField] private List<Quest> availableQuests = new List<Quest>();
    [SerializeField] private List<Quest> allQuests = new List<Quest>(); // All quests in the game
    
    void Start()
    {
        RefreshAvailableQuests();
    }

    void Update()
    {
        
    }
    
    public void StartQuest(Quest quest)
    {
        if (availableQuests.Contains(quest) && !activeQuests.Contains(quest))
        {
            activeQuests.Add(quest);
            availableQuests.Remove(quest);
            Debug.Log($"Quest '{quest.questName}' started.");
        }
    }
    
    public void StartQuest(string questName)
    {
        Quest quest = allQuests.Find(q => q.questName == questName);
        if (quest != null)
            StartQuest(quest);
        else
            Debug.LogWarning($"Quest '{questName}' not found.");
    }
    
    public void CompleteQuest(Quest quest)
    {
        if (activeQuests.Contains(quest))
        {
            activeQuests.Remove(quest);
            completedQuests.Add(quest);
            Debug.Log($"Quest '{quest.questName}' completed.");
            RefreshAvailableQuests(); // Unlock new quests
        }
    }
    
    public void CompleteQuest(string questName)
    {
        Quest quest = allQuests.Find(q => q.questName == questName);
        if (quest != null)
            CompleteQuest(quest);
        else
            Debug.LogWarning($"Quest '{questName}' not found.");
    }
    
    public void AbandonQuest(Quest quest)
    {
        if (activeQuests.Contains(quest))
        {
            activeQuests.Remove(quest);
            Debug.Log($"Quest '{quest.questName}' abandoned.");
        }
    }
    
    public void AbandonQuest(string questName)
    {
        Quest quest = allQuests.Find(q => q.questName == questName);
        if (quest != null)
            AbandonQuest(quest);
        else
            Debug.LogWarning($"Quest '{questName}' not found.");
    }
    
    public void FailQuest(Quest quest)
    {
        if (activeQuests.Contains(quest))
        {
            activeQuests.Remove(quest);
            Debug.Log($"Quest '{quest.questName}' failed.");
        }
    }
    
    public void FailQuest(string questName)
    {
        Quest quest = allQuests.Find(q => q.questName == questName);
        if (quest != null)
            FailQuest(quest);
        else
            Debug.LogWarning($"Quest '{questName}' not found.");
    }
    
    public string[] GetPrerequisites(Quest quest)
    {
        return quest.prerequisiteNames;
    }
    
    private bool ArePrerequisitesMet(Quest quest)
    {
        if (quest.prerequisiteNames == null || quest.prerequisiteNames.Length == 0)
            return true;
        
        foreach (var prereqName in quest.prerequisiteNames)
        {
            Quest prereqQuest = allQuests.Find(q => q.questName == prereqName);
            if (prereqQuest == null || !completedQuests.Contains(prereqQuest))
            {
                return false;
            }
        }
        return true;
    }
    
    public void GetQuestDetails(Quest quest)
    {
        Debug.Log($"Quest Name: {quest.questName}");
        Debug.Log($"Description: {quest.questDescription}");
        Debug.Log($"Required Level: {quest.requiredLevel}");
        Debug.Log($"Reward Gold: {quest.rewardGold}");
        Debug.Log($"Reward Experience: {quest.rewardExperience}");
        Debug.Log($"Required Quantity: {quest.requiredQuantity}");
    }
    
    public void GetQuestDetails(string questName)
    {
        Quest quest = allQuests.Find(q => q.questName == questName);
        if (quest != null)
            GetQuestDetails(quest);
        else
            Debug.LogWarning($"Quest '{questName}' not found.");
    }
    
    public void CheckQuestStatus(Quest quest)
    {
        if (activeQuests.Contains(quest))
        {
            Debug.Log($"Quest '{quest.questName}' is currently active.");
        }
        else if (completedQuests.Contains(quest))
        {
            Debug.Log($"Quest '{quest.questName}' has been completed.");
        }
        else if (availableQuests.Contains(quest))
        {
            Debug.Log($"Quest '{quest.questName}' is available.");
        }
        else
        {
            Debug.Log($"Quest '{quest.questName}' is not available.");
        }
    }
    
    public void CheckQuestStatus(string questName)
    {
        Quest quest = allQuests.Find(q => q.questName == questName);
        if (quest != null)
            CheckQuestStatus(quest);
        else
            Debug.LogWarning($"Quest '{questName}' not found.");
    }
    
    public List<Quest> GetAvailableQuests()
    {
        return new List<Quest>(availableQuests);
    }
    
    public List<Quest> GetActiveQuests()
    {
        return new List<Quest>(activeQuests);
    }
    
    public List<Quest> GetCompletedQuests()
    {
        return new List<Quest>(completedQuests);
    }
    
    private void RefreshAvailableQuests()
    {
        availableQuests.Clear();
        
        foreach (var quest in allQuests)
        {
            // Skip if already active or completed
            if (activeQuests.Contains(quest) || completedQuests.Contains(quest))
                continue;
            
            // Check if prerequisites are met
            if (ArePrerequisitesMet(quest))
            {
                availableQuests.Add(quest);
            }
        }
    }
}