using UnityEngine;
using System.Collections.Generic;
using System.Linq;
using EasyTalk.Nodes;

[CreateAssetMenu(fileName = "New Quest", menuName = "RPG/Quest")]
public class Quest : ScriptableObject
{
    [Header("Basic Info")]
    public string questId;
    public string questName;
    [TextArea(3, 5)]
    public string description;
    [TextArea(2, 4)]
    public string summary;

    [Header("Quest Properties")]
    public int level = 1;
    public bool isMainQuest = false;
    public bool isRepeatable = false;
    public Quest[] prerequisites;

    [Header("Objectives")]
    public List<QuestObjective> objectives = new List<QuestObjective>();
    public string currentObjective;    [Header("Rewards")]
    public int experienceReward = 100;
    public int goldReward = 50;
    public string[] itemRewards;

    // Runtime data (not serialized)
    [System.NonSerialized]
    public QuestStatus status = QuestStatus.NotStarted;

    /// <summary>
    /// Check if all required objectives are completed
    /// </summary>
    public bool AreRequiredObjectivesCompleted()
    {
        return objectives.Where(obj => !obj.isOptional).All(obj => obj.isCompleted);
    }

    /// <summary>
    /// Check if all objectives (including optional) are completed
    /// </summary>
    public bool AreAllObjectivesCompleted()
    {
        return objectives.All(obj => obj.isCompleted);
    }

    /// <summary>
    /// Get overall quest progress percentage (0-1)
    /// </summary>
    public float GetProgressPercentage()
    {
        if (objectives.Count == 0) return 0f;

        float totalProgress = objectives.Sum(obj => obj.GetProgressPercentage());
        return totalProgress / objectives.Count;
    }

    /// <summary>
    /// Get specific objective by ID
    /// </summary>
    public QuestObjective GetObjective(string objectiveId)
    {
        return objectives.FirstOrDefault(obj => obj.objectiveId == objectiveId);
    }

    /// <summary>
    /// Reset all objectives
    /// </summary>
    public void ResetObjectives()
    {
        foreach (var objective in objectives)
        {
            objective.Reset();
        }
    }

    /// <summary>
    /// Validate quest data
    /// </summary>
    public bool IsValid()
    {
        if (string.IsNullOrEmpty(questId) || string.IsNullOrEmpty(questName))
            return false;

        if (objectives.Count == 0)
            return false;

        // Check for duplicate objective IDs
        var objectiveIds = objectives.Select(obj => obj.objectiveId).ToList();
        return objectiveIds.Count == objectiveIds.Distinct().Count();
    }

    public void GetCurrentObjective(out QuestObjective currentObjective, out int currentIndex)
    {
        currentObjective = null;
        currentIndex = -1;

        for (int i = 0; i < objectives.Count; i++)
        {
            if (!objectives[i].isCompleted)
            {
                currentObjective = objectives[i];
                currentIndex = i;
                break;
            }
        }
    }
}