using System;
using Core.TaskSystem;
using Michsky.UI.Reach;
using UnityEngine;
using UnityEngine.Events;

namespace UI.Tasks
{
    public class TaskListItemView : MonoBehaviour
    {
        [SerializeField] private ButtonManager button;

        [Header("Status Presentation")]
        [SerializeField] private Sprite todoIcon;
        [SerializeField] private Sprite completedIcon;
        [SerializeField] private Sprite expiredIcon;

        [SerializeField] private string todoPrefix = "";
        [SerializeField] private string completedPrefix = "";
        [SerializeField] private string expiredPrefix = "";

        TaskEntry task;
        Action<TaskEntry> onClicked;
        UnityAction clickAction;

        void Awake()
        {
            if (button == null) { button = GetComponent<ButtonManager>(); }
        }

        public void Bind(TaskEntry task, Action<TaskEntry> onClicked)
        {
            this.task = task;
            this.onClicked = onClicked;

            if (button == null)
            {
                Debug.LogError($"{nameof(TaskListItemView)} on '{name}' is missing ButtonManager reference.");
                return;
            }

            if (clickAction != null) { button.onClick.RemoveListener(clickAction); }
            clickAction = HandleClick;
            button.onClick.AddListener(clickAction);

            ApplyPresentation(task);
        }

        void OnDestroy()
        {
            if (button != null && clickAction != null) { button.onClick.RemoveListener(clickAction); }
        }

        void HandleClick()
        {
            onClicked?.Invoke(task);
        }

        void ApplyPresentation(TaskEntry task)
        {
            if (task == null)
            {
                if (button != null) { button.SetText(string.Empty); }
                return;
            }

            (Sprite icon, string prefix) = task.status switch
            {
                TaskStatus.Completed => (completedIcon, completedPrefix),
                TaskStatus.Expired => (expiredIcon, expiredPrefix),
                _ => (todoIcon, todoPrefix)
            };

            button.enableIcon = icon != null;
            button.buttonIcon = icon;

            string label = string.IsNullOrEmpty(prefix) ? task.ShortName : $"{prefix}{task.ShortName}";
            button.SetText(label);
        }
    }
}