using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Decentralized
{
    /// <summary>
    /// 放大镜检视显卡时的大图：和香烟一样把物品放大摆在检视台上，正反面各一张，看外观自己判断真假。
    /// 游戏没有给 mod 开放检视界面，这里不打补丁，只在检视台（InspectionUIManager.panel）下面挂一个自己的界面，
    /// 用一个常驻的 MonoBehaviour 每帧看一眼是否正在检视显卡。
    /// </summary>
    public sealed class GpuInspectView : MonoBehaviour
    {
        private static GpuInspectView instance;
        private RectTransform root, cardRoot;
        private Button flip;
        private TextMeshProUGUI flipText;
        private GameItem shown;
        private string shownSig;

        public static void Ensure()
        {
            if (instance != null) return;
            var go = new GameObject("pd_gpu_inspect_view");
            DontDestroyOnLoad(go);
            instance = go.AddComponent<GpuInspectView>();
        }

        public static void Remove()
        {
            if (instance != null) Destroy(instance.gameObject);
            instance = null;
        }

        private void Update()
        {
            var m = InspectionUIManager.Instance;
            var item = m != null && m.panel != null && m.panel.activeSelf ? m.currentInspectingItem : null;
            if (item == null || !Items.IsGpu(item))
            {
                if (root != null && root.gameObject.activeSelf) root.gameObject.SetActive(false);
                shown = null;
                return;
            }
            Log.Guard("显卡检视大图", () =>
            {
                if (root == null) Build(m);
                if (!root.gameObject.activeSelf) root.gameObject.SetActive(true);
                var keys = new List<string>();
                string sig = Items.LookKeys(item, keys) + "|" + string.Join(",", keys);
                if (item != shown || sig != shownSig)
                {
                    shown = item;
                    shownSig = sig;
                    Redraw(item);
                }
            });
        }

        private void Build(InspectionUIManager m)
        {
            root = new GameObject("_PdGpuInspection", typeof(RectTransform)).GetComponent<RectTransform>();
            root.SetParent(m.panel.transform, false);
            root.sizeDelta = new Vector2(1920, 1080);
            root.localPosition = Vector3.zero;
            cardRoot = new GameObject("Card", typeof(RectTransform)).GetComponent<RectTransform>();
            cardRoot.SetParent(root, false);
            cardRoot.localPosition = new Vector3(0, 40, 0);
            // 翻面按钮：复制鉴定面板里"发送"按钮的外观
            var template = m.appraisalPanel.transform.Find("buttonSend");
            if (template != null)
            {
                var go = Instantiate(template.gameObject, root, false);
                go.name = "Flip";
                go.transform.localPosition = new Vector3(0, -300, 0);
                flip = go.GetComponent<Button>();
                flip.onClick = new Button.ButtonClickedEvent();
                flip.onClick.AddListener(() => { if (shown != null) Items.Flip(shown); });
                flipText = go.GetComponentInChildren<TextMeshProUGUI>();
                // 去掉复制来的按钮上驱动文字的组件（本地化 / 提交逻辑），文字由这里设置
                foreach (var mb in go.GetComponentsInChildren<MonoBehaviour>(true))
                {
                    string n = mb.GetType().Name;
                    if (mb is Button || mb is Image || mb is TextMeshProUGUI || mb is CanvasRenderer) continue;
                    if (n.Contains("Local") || n.Contains("Appraisal") || n.Contains("Send")) Destroy(mb);
                }
            }
        }

        private void Redraw(GameItem item)
        {
            foreach (Transform c in cardRoot) Destroy(c.gameObject);
            var keys = new List<string>();
            string baseKey = Items.LookKeys(item, keys);
            keys.Insert(0, baseKey);
            foreach (var small in keys)
            {
                // 检视用大图：键名对应小图（gpu_probidia_f → gpu_big_probidia_f，gpu_ov_fan1 → gpu_big_ov_fan1）
                string k = small.StartsWith("gpu_ov_") ? "gpu_big_ov_" + small.Substring("gpu_ov_".Length) : "gpu_big_" + small.Substring("gpu_".Length);
                var sprite = Items.ModSprite(k);
                if (sprite == null) continue;
                var go = new GameObject(k, typeof(RectTransform), typeof(Image));
                var rt = go.GetComponent<RectTransform>();
                rt.SetParent(cardRoot, false);
                rt.sizeDelta = new Vector2(sprite.rect.width, sprite.rect.height);
                rt.localScale = Vector3.one * 4f;
                var img = go.GetComponent<Image>();
                img.sprite = sprite;
                img.raycastTarget = false;
            }
            if (flipText != null) flipText.text = L.T(Items.IsBack(item) ? "inspect.flip.front" : "inspect.flip.back");
        }
    }
}