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

[CreateAssetMenu(menuName = "Dialogue/Dialogue Asset", fileName = "NewDialogue")]
public class DialogueAsset : ScriptableObject
{
    [Tooltip("Start from this node id when dialogue begins")]
    public int startNodeId = 0;

    public List<Node> nodes = new();

    [Serializable]
    public class Node
    {
        public int id = 0;
        public string speakerName;
        public Sprite speakerPortrait;

        [Tooltip("Shown in order. If more than one, player taps/presses to advance within the same node.")]
        [TextArea(2, 4)] public List<string> lines = new();

        [Tooltip("Invoked when this node is entered (before showing text).")]
        public UnityEvent onEnter;

        [Tooltip("If no choices and nextNodeId < 0, dialogue ends after this node.")]
        public int nextNodeId = -1;

        public List<Choice> choices = new();
    }

    [Serializable]
    public class Choice
    {
        [TextArea(1, 2)] public string text;

        [Tooltip("Go to this node when chosen. If < 0, ends dialogue.")]
        public int nextNodeId = -1;

        [Header("Conditions / Effects")]
        [Tooltip("If non-empty, this choice is only visible when the flag is present in DialogueManager.")]
        public string requireFlag;

        [Tooltip("If non-empty, set this flag on choose (stored in DialogueManager).")]
        public string setFlag;

        [Tooltip("Optional SFX or other hook.")]
        public UnityEvent onChoose;
    }

    public bool TryGetNode(int id, out Node node)
    {
        node = nodes.Find(n => n.id == id);
        return node != null;
    }
}