using Newtonsoft.Json;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.UIElements;

// 这个controller 是用于控制 Shopping UI菜单的
public class ShoppingController : MonoBehaviour
{
    // Start is called before the first frame update
    // 主页面元素
    private Button foodButton, toyButton, otherButton, backButton;
    private Label coinQty;
    private List<ItemInShop> shoppingItems = new();
    private VisualElement itemListView;

    //弹窗元素
    private Button yesButton, noButton;
    private Label msgBody;
    private VisualElement msgRoot, msgField;

    // 选中的产品
    private string selectedItemId;

    void Start()
    {
        // 基层元素获取
        var root = GetComponent<UIDocument>().rootVisualElement;
        var mainManu = root.Q<VisualElement>("mainManu");
        itemListView = root.Q<VisualElement>("itemListView");
        foodButton = mainManu.Q<Button>("food");
        foodButton.clicked += () => TabSwitch(foodButton);
        toyButton = mainManu.Q<Button>("toy");
        toyButton.clicked += () => TabSwitch(toyButton);
        otherButton = mainManu.Q<Button>("other");
        otherButton.clicked += () => TabSwitch(otherButton);
        var coinArea = root.Q<VisualElement>("coinArea");
        coinQty = coinArea.Q<Label>("coinQty");
        backButton = root.Q<Button>("back");

        // 弹窗元素获取
        msgRoot = root.Q<VisualElement>("msgRoot");
        msgField = msgRoot.Q<VisualElement>("msgField");
        msgBody = msgField.Q<Label>("msgBody");
        yesButton = msgField.Q<Button>("msgYes");
        noButton = msgField.Q<Button>("msgNo");
        noButton.clicked += MsgNoClick;

        //初始化设定
        LanguageSetting();
        DataLoading();
        GetItemList("food");
        foodButton.transform.scale = new Vector3(1.2f, 1.2f);
        InstallItems("food");
    }

    // Update is called once per frame
    //void Update()
    //{
        
    //}

    //菜单语言设定
    void LanguageSetting()
    {
        // 设置 shopping UI界面里面label和按键的语言显示
        string textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "shoppingUI", "button", "food", EnviromentSetting.languageCode });
        foodButton.text = textValue;
        textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "shoppingUI", "button", "toy", EnviromentSetting.languageCode });
        toyButton.text = textValue;
        textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "shoppingUI", "button", "other", EnviromentSetting.languageCode });
        otherButton.text = textValue;
        textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "shoppingUI", "button", "back", EnviromentSetting.languageCode });
        backButton.text = textValue;
    }

    //获取所有产品列表，切换商品分类之后，需要重新读取和加载
    void GetItemList(string type)
    {
        // 按照类别获取shopping items
        shoppingItems.Clear();
        string itemRawData = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "shoppingUI", "item", type});
        Dictionary<string, object> itemDict = JsonConvert.DeserializeObject<Dictionary<string, object>>(itemRawData);
        foreach (string _item in itemDict.Keys)
        {
            var itemDetail =JsonConvert.DeserializeObject<Dictionary<string, object>>(itemDict[_item].ToString());
            string price = itemDetail["price"].ToString();
            string picture = itemDetail["picture"].ToString();
            var desc = JsonConvert.DeserializeObject<Dictionary<string, object>>(itemDetail["description"].ToString());
            string description = desc[EnviromentSetting.languageCode].ToString();
            ItemInShop SearchedItem = new(_item, description, price, picture);
            shoppingItems.Add(SearchedItem);
        }
    }

    // 将items装载到菜单中，切换商品分类之后，需要重新读取和加载
    void InstallItems(string type)
    {
        var root = GetComponent<UIDocument>().rootVisualElement;
        itemListView.Clear();
        VisualTreeAsset itemResource = Resources.Load<VisualTreeAsset>("Shopping/Item");
        List<ItemInShop> items = new();
        foreach(var item in shoppingItems)
        {
            var itemFrame = new VisualElement();
            itemFrame = itemResource.CloneTree();
            var description = itemFrame.Q<Label>("description");
            description.text = item.description;
            var price = itemFrame.Q<Label>("price");
            price.text = item.price;
            var texture = Resources.Load<Texture2D>(item.picture);
            var picture = itemFrame.Q<VisualElement>("picture");
            picture.style.backgroundImage = new StyleBackground(texture);
            itemFrame.RegisterCallback<ClickEvent>(e => ItemClick(e, item.id, item.description));

            itemListView.Add(itemFrame);
        }
    }

    // 点击商品后跳出确认窗口
    void ItemClick(ClickEvent clickEvent, string itemId, string description=null)
    {
        selectedItemId = itemId;
        msgBody.text = description;
        msgRoot.visible = true;
    }

    // 数据读取
    void DataLoading()
    {
        // 游戏金币数量读取
        coinQty.text = UserProperty.coin.ToString();
    }
    
    void TabSwitch(Button btn)
    {
        itemListView.style.backgroundColor = btn.resolvedStyle.backgroundColor;
        foodButton.transform.scale = new Vector3(1f, 1f, 1);
        toyButton.transform.scale = new Vector3(1f, 1f, 1);
        otherButton.transform.scale = new Vector3(1f, 1f, 1);
        btn.transform.scale = new Vector3(1.2f, 1.2f, 1);
        itemListView.Clear();
        // 这里btn.name必须和json里面商品类别完全匹配
        GetItemList(btn.name);
        InstallItems(btn.name);
    }

    // msg no button 点击
    void MsgNoClick()
    {
        msgRoot.visible = false;
    }
    // msg yes button 点击
    // todo 以后在这里添加调出确认页面，确认后发送订单给服务器
    void MsgYesClick()
    {
        Debug.Log("msg yes clicked");
        msgRoot.visible = false;
    }
}


public class ItemInShop
{
    public string id;
    public string description;
    public string picture;
    public string price;

    public ItemInShop(string id, string desc, string price, string picture) { 
        this.id = id;
        this.description = desc;
        this.price = price;
        this.picture = picture;
    }
}