using System.Collections.Generic;
using Newtonsoft.Json;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using UnityEngine.UIElements;
using ZXing;
using Button = UnityEngine.UIElements.Button;

/* 第一次创建狗的时候选择创建或者是领养
*/

public class CreateOrAdopt : MonoBehaviour
{
    private Label messageLabel;
    private Button createBtn, adoptBtn, cancelBtn;
    GameObject canvasPlaceholder, initDogCanvas, createAdoptCanvas, cameraContent;
    private VisualElement backHome;

    public RawImage cameraTexture; // 摄像头画面显示区域
    private WebCamTexture webCamTexture; // 摄像头纹理
    private BarcodeReader barcodeReader; // 二维码识别器
    private bool isScanning = false; // 是否正在扫描
    private float interval = 0.5f; // 扫描间隔
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        var root = GetComponent<UIDocument>().rootVisualElement;
        messageLabel = root.Q<Label>("message");
        createBtn = root.Q<Button>("create");
        adoptBtn = root.Q<Button>("adopt");
        cancelBtn = root.Q<Button>("cancel");
        backHome = root.Q<VisualElement>("backHome");

        canvasPlaceholder = GameObject.Find("Canvas Placeholder");
        initDogCanvas = canvasPlaceholder.transform.Find("Init Dog Canvas").gameObject;
        createAdoptCanvas = canvasPlaceholder.transform.Find("Create Or Adopt Canvas").gameObject;

        createBtn.RegisterCallback<ClickEvent>(e => CreateClick(e));
        adoptBtn.RegisterCallback<ClickEvent>(e => AdoptClick(e));
        cancelBtn.RegisterCallback<ClickEvent>(e => CancelClick(e));
        backHome.RegisterCallback<ClickEvent>(e => BackHomeClick(e));

        string textValue = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "InitDogUI", "button", "create", EnviromentSetting.languageCode });
        createBtn.text = textValue;
        textValue = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "InitDogUI", "button", "adopt", EnviromentSetting.languageCode });
        adoptBtn.text = textValue;
        textValue = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "InitDogUI", "button", "cancel", EnviromentSetting.languageCode });
        cancelBtn.text = textValue;
        textValue = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "InitDogUI", "label", "create or adopt msg", EnviromentSetting.languageCode });
        messageLabel.text = textValue;

        cameraContent = createAdoptCanvas.transform.Find("Camera Content").gameObject;
        cameraContent.SetActive(false);

        if (UserProperty.dogs.Count > 0)
        {
            // backHome按键显示
            backHome.style.display = DisplayStyle.Flex;
        }
        else
        {
            // backHome按键隐藏
            backHome.style.display = DisplayStyle.None;
        }
    }

    // Update is called once per frame
    void Update()
    {
        if (isScanning)
        {
            interval -= Time.deltaTime;
            if (interval <= 0)
            {
                interval = 0.25f; // 重置间隔
                ScanQRCode();
            }
        }
    }

    void SwitchToCreate()
    {
        initDogCanvas.SetActive(true);
        createAdoptCanvas.SetActive(false);
    }

    // void SwitchToAdopt()
    // {

    // }



    void CreateClick(ClickEvent e)
    {
        SwitchToCreate();
    }

    void AdoptClick(ClickEvent e)
    {
        // todo 扫码从别人那边继承狗
        if (!isScanning)
        {
            isScanning = true;
            InitCamera();
        }
    }

    void CancelClick(ClickEvent e)
    {
        if (webCamTexture != null)
        {
            webCamTexture.Stop();
        }
        isScanning = false;
        var cameraContent = GameObject.Find("Camera Content");
        cameraContent.SetActive(false);
        messageLabel.visible = true;
        // messageLabel.style.display = DisplayStyle.Flex;
        createBtn.style.display = DisplayStyle.Flex;
        adoptBtn.style.display = DisplayStyle.Flex;
        cancelBtn.style.display = DisplayStyle.None;
    }

    void BackHomeClick(ClickEvent e)
    {
        // 返回Home场景
        SceneManager.LoadScene("Home");
    }

    private void InitCamera()
    {
        WebCamDevice[] devices = WebCamTexture.devices;
        if (devices.Length > 0)
        {
            webCamTexture = new WebCamTexture(devices[0].name, 640, 480);
            cameraTexture.texture = webCamTexture;
            webCamTexture.Play();
            barcodeReader = new BarcodeReader();

            cameraContent.SetActive(true);
            messageLabel.visible = false;
            // messageLabel.style.display = DisplayStyle.None;
            createBtn.style.display = DisplayStyle.None;
            adoptBtn.style.display = DisplayStyle.None;
            cancelBtn.style.display = DisplayStyle.Flex;
        }
        else
        {
            Debug.LogError("No camera found!");
        }
    }

    private void ScanQRCode()
    {
        if (webCamTexture != null && webCamTexture.didUpdateThisFrame)
        {
            Color32[] pixels = webCamTexture.GetPixels32();
            Result result = barcodeReader.Decode(pixels, webCamTexture.width, webCamTexture.height);
            if (result != null)
            {
                Debug.Log("扫描结果：" + result.Text); // 将扫描结果输出到控制台
                string qrCode = result.Text;
                if (qrCode.Length > 18 && qrCode.Substring(0, 17) == "ARdog://transfer/")
                {
                    // 处理二维码内容
                    string transferCode = qrCode.Substring(17);
                    Debug.Log("转移代码：" + transferCode);
                    SubmitQRCodeRequest(transferCode); // 提交二维码请求 
                    isScanning = false;
                    webCamTexture.Stop();
                }
            }
        }
    }

    private void OnDestroy()
    {
        if (webCamTexture != null)
        {
            webCamTexture.Stop();
        }
    }

    private void SubmitQRCodeRequest(string transferCode)
    {
        string url = "/api/transfer_dog/receive/";
        Dictionary<string, string> formData = new();
        WWWForm form = new();
        form.AddField("user_id", UserProperty.userId);
        form.AddField("transfer_code", transferCode);
        StartCoroutine(WebController.PostRequest(url, form, callback: SubmitQRCodeCallback));
    }

    private void SubmitQRCodeCallback(string json)
    {
        var data = JsonConvert.DeserializeObject<Dictionary<string, object>>(json);
        // 处理返回的结果
        if (data != null && data["status"].ToString() == "success")
        {
            // 成功处理逻辑
            string user_info = data["user_info"].ToString();
            UserProperty.RefreshUserInfo(user_info);
            string dog_list = data["dog_list"].ToString();
            UserProperty.RefreshDogInfo(dog_list);
            string msg = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "InitDogUI", "message", "receive_success", EnviromentSetting.languageCode });
            msg = msg.Replace("<<dog_name>>", data["dog_name"].ToString());
            MessageBoxController.ShowMessage(msg, () => SceneManager.LoadScene("Home"));
        }
        else
        {
            // 失败处理逻辑
            string msg = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "InitDogUI", "message", "receive_fail", EnviromentSetting.languageCode });
            MessageBoxController.ShowMessage(msg);
            ClickEvent e = new ClickEvent();
            CancelClick(e);
        }
    }

    private void AdoptionSuccessHandler()
    {
        // 领养成功后的处理逻辑
        // 以下三行代码不知道为什么要加，但是不加会报错
        var canvasPlaceholder = GameObject.Find("Canvas Placeholder");
        var loginCanvas = canvasPlaceholder.transform.Find("Login Canvas").gameObject;
        loginCanvas.SetActive(true);
        LoginController.instance.GetUserData();
    }

}