using System;
using AibisDream;
using AibisDream.Utility;
using TMPro;
using UnityEngine;
using UnityEngine.Localization.Components;
using UnityEngine.UI;

namespace AibisDream.UI
{
    [RequireComponent(typeof(BaseButton))]
    public class TerminalButton : MonoBehaviour
    {
        [SerializeField] private BaseButton button;
        [SerializeField] private Image buttonImage;
        [SerializeField] private Image backgroundImage;
        [SerializeField] private TMP_Text labelText;
        [SerializeField] private LocalizeStringEvent labelLocalize;

        [Header("文字")]
        [SerializeField] private string defaultLabel = string.Empty;

        [Header("前景色彩（文字 + 按钮图）")]
        [SerializeField] private Color normalForegroundColor = Color.white;
        [SerializeField] private Color hoverForegroundColor = new Color(0.02f, 0.02f, 0.04f);

        [Header("底图色彩")]
        [SerializeField] private Color normalBackgroundColor = new Color(1f, 1f, 1f, 0f);
        [SerializeField] private Color hoverBackgroundColor = Color.white;

        [Header("禁用")]
        [SerializeField] private Color disabledForegroundColor = new Color(0.78431374f, 0.78431374f, 0.78431374f, 0.5f);
        [SerializeField] private Color disabledBackgroundColor = new Color(1f, 1f, 1f, 0.3f);

        

        public BaseButton Button => button != null ? button : (button = GetComponent<BaseButton>());

        private SelectionType _prevSelectionState = SelectionType.Normal;

        private void Awake()
        {
            button = GetComponent<BaseButton>();
            if (buttonImage == null)
            {
                buttonImage = GetComponent<Image>();
            }

            if (labelLocalize == null && labelText != null)
            {
                labelLocalize = labelText.GetComponent<LocalizeStringEvent>();
            }

            button.onStateTransition.AddListener(OnStateTransition);
            button.onClick.AddListener(OnClick);

            if (!string.IsNullOrEmpty(defaultLabel))
            {
                SetLabel(defaultLabel);
            }
        }

        private void OnEnable()
        {
            if (button != null)
            {
                OnStateTransition(button.CurSelectionState, true);
            }
        }

        private void OnDestroy()
        {
            if (button != null)
            {
                button.onStateTransition.RemoveListener(OnStateTransition);
                button.onClick.RemoveListener(OnClick);
            }
        }

        public void SetLabel(string value)
        {
            if (labelLocalize != null && IsLocalizationKey(value))
            {
                labelLocalize.enabled = true;
                labelLocalize.SetTable(ConstRef.UITextTable);
                labelLocalize.SetEntry(value);
                return;
            }

            if (labelLocalize != null)
            {
                labelLocalize.enabled = false;
            }

            if (labelText != null)
            {
                labelText.text = value;
            }
        }

        private void OnStateTransition(SelectionType state, bool instant)
        {
            if (button.interactable
                && state == SelectionType.Highlighted
                && _prevSelectionState == SelectionType.Normal)
            {
                TerminalUIAudio.NotifyHover();
            }

            _prevSelectionState = state;

            switch (state)
            {
                case SelectionType.Disabled:
                    ApplyForegroundColor(disabledForegroundColor);
                    ApplyBackgroundColor(disabledBackgroundColor);
                    break;
                case SelectionType.Highlighted:
                case SelectionType.Pressed:
                case SelectionType.Selected:
                    ApplyForegroundColor(hoverForegroundColor);
                    ApplyBackgroundColor(hoverBackgroundColor);
                    break;
                default:
                    ApplyForegroundColor(normalForegroundColor);
                    ApplyBackgroundColor(normalBackgroundColor);
                    break;
            }
        }

        private void ApplyForegroundColor(Color color)
        {
            if (buttonImage != null)
            {
                buttonImage.color = color;
            }

            if (labelText != null)
            {
                labelText.color = color;
            }
        }

        private void ApplyBackgroundColor(Color color)
        {
            if (backgroundImage != null)
            {
                backgroundImage.color = color;
            }
        }

        private void OnClick()
        {
            if (button != null && button.interactable)
            {
                TerminalUIAudio.NotifyClick();
            }
        }

        private static bool IsLocalizationKey(string value)
        {
            return !string.IsNullOrEmpty(value) && value.Contains("_", StringComparison.Ordinal);
        }
    }
}