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

public class QuestGiver : MonoBehaviour
{
    [SerializeField] private TextAsset questFile;
    [SerializeField] private InventoryItem reward;
    [SerializeField] private ItemReward requiredItem;
    [SerializeField] public DeleteTreeReward rewardFunction;
    [SerializeField] public int requiredBlueberries = 0;

    public bool isActive;
    public bool isCompleted;

    public QuestData quest;


    // Start is called once before the first execution of Update after the MonoBehaviour is created
    private void Awake()
    {
        if (questFile == null)
        {
            Debug.LogError("Quest file is not assigned in the inspector.");
            return;
        }

        // Load the quest data from the TextAsset
        try
        {
            quest = JsonUtility.FromJson<QuestData>(questFile.text);
        }
        catch (Exception e)
        {
            Debug.LogError("Failed to parse quest data: " + e.Message);
        }

    }

    private void Start()
    {
    }

    // Update is called once per frame
    private void Update()
    {

    }

    public QuestData GetCurrentQuest()
    {
        return quest;
    }
    public void SetCurrentQuest(QuestData questSave)
    {
        quest = questSave;
    }

    public void CheckInventory(List<InventoryItem> inventory)
    {
        InventoryItem item = inventory.Find(e => e.itemName == requiredItem.itemName);
        // Check if the required item is in the player's inventory
        if (item != null && item.quantity >= requiredItem.quantity)
        {
            isCompleted = true; // Mark the quest as completed
            FinishQuest();
        }

        else
        {
            isCompleted = false; // Mark the quest as not completed
        }
    }

    public Dialog[] Talk()
    {
        Debug.Log("Talking to quest giver: " + quest.id);

        if (!isActive && isCompleted)
        {
            return quest.repetition;
        }

        if (!isActive)
        {
            isActive = true;
            return quest.initial;
        }

        if (isActive)
        {
            if (!isCompleted)
            {
                if (requiredBlueberries > 0)
                {
                    // Check if the player has enough blueberries
                    PlayerInteraction player = GameObject.Find("Fox").GetComponent<PlayerInteraction>();
                    if (player.GetBlueberryCount() >= requiredBlueberries)
                    {
                        isCompleted = true; // Mark the quest as completed
                        FinishQuest();
                        return quest.success;
                    }
                }
                else
                {
                    CheckInventory(GameObject.FindGameObjectsWithTag("Player")[0].GetComponent<PlayerInteraction>().GetInventoryItems());
                }
            }

            // Re-check after CheckInventory potentially updates the quest
            if (isCompleted)
            {
                isActive = false;
                return quest.success;
            }
            else
            {
                return quest.reminder;
            }
        }

        return null; // fallback
    }

    public Dialog[] FinishQuest()
    {
        // If the quest is active and completed, return the success dialog
        PlayerInteraction player = GameObject.Find("Fox").GetComponent<PlayerInteraction>();
        if (requiredBlueberries > 0)
        {
            player.SetBlueberryCount(player.GetBlueberryCount() - requiredBlueberries);
            Debug.Log("Removed " + requiredBlueberries + " blueberries from player.");
        }
        else
        {
            player.RemoveFromInventory(requiredItem);
        }
        if (reward)
        {
            reward.giveReward(GameObject.Find("Fox")); // Give the reward to the player
        }
        if (rewardFunction != null)
            rewardFunction.RewardPlayer();
        isActive = false;
        isCompleted = true;
        return quest.success;
    }
}