using System;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.UI;
using Kill.Managers;
using Kill.Network;
using Kill.UI.Components;

namespace Kill.UI.Pages
{
    /// <summary>
    /// 注销账号页面（提示确认 -> 验证码(复用SelfVerificationCodePanel) -> 最终确认）
    /// 在 SelfInfoPage 中通过 cancelAccountPagePrefab 实例化，Init 传入返回回调
    /// </summary>
    public class SelfCancelAccountPage : MonoBehaviour
    {
        [Header("提示界面1（提示确认）")]
        public GameObject stepConfirm;
        public Button confirmNextBtn;    // 确认，进入验证码
        public Button step1CancelBtn;    // 取消，关闭页面

        [Header("验证码页（复用 SelfVerificationCodePanel）")]
        public SelfVerificationCodePanel verificationCodePanelPrefab;

        [Header("提示界面2（最终确认）")]
        public GameObject stepFinal;
        public Button finalConfirmBtn;   // 确认注销
        public Button step3BackBtn;      // 返回

        private Action onBackCallback;
        private string verifyCode;       // 校验通过的验证码
        private bool isSubmitting = false;
        private SelfVerificationCodePanel verificationCodePanel;

        public void Init(Action onBack)
        {
            onBackCallback = onBack;
            UIManager.Instance.RegisterBackAction(OnBack);

            // 提示界面1
            if (confirmNextBtn != null)
            {
                confirmNextBtn.onClick.RemoveAllListeners();
                confirmNextBtn.onClick.AddListener(OnConfirmNext);
            }
            if (step1CancelBtn != null)
            {
                step1CancelBtn.onClick.RemoveAllListeners();
                step1CancelBtn.onClick.AddListener(OnBack);
            }

            // 提示界面2
            if (finalConfirmBtn != null)
            {
                finalConfirmBtn.onClick.RemoveAllListeners();
                finalConfirmBtn.onClick.AddListener(OnFinalConfirm);
            }
            if (step3BackBtn != null)
            {
                step3BackBtn.onClick.RemoveAllListeners();
                step3BackBtn.onClick.AddListener(OnBack);
            }

            // 默认显示提示界面1
            ShowStep(stepConfirm);
        }

        /// <summary>
        /// 切换显示步骤
        /// </summary>
        private void ShowStep(GameObject step)
        {
            if (stepConfirm != null) stepConfirm.SetActive(step == stepConfirm);
            if (stepFinal != null) stepFinal.SetActive(step == stepFinal);
        }

        /// <summary>
        /// 提示界面1确认，打开验证码面板（注销场景）
        /// </summary>
        private void OnConfirmNext()
        {
            stepConfirm.SetActive(false);
            if (verificationCodePanelPrefab == null)
                return;
            verificationCodePanel = Instantiate(verificationCodePanelPrefab, transform);
            verificationCodePanel.gameObject.SetActive(true);
            verificationCodePanel.Init(OnVerifySuccess, OnBack, SelfVerificationCodePanel.VerificationScene.CancelAccount);
        }

        /// <summary>
        /// 验证码校验成功，进入最终确认
        /// </summary>
        private void OnVerifySuccess()
        {
            verifyCode = verificationCodePanel != null ? verificationCodePanel.VerifiedCode : "";
            if (verificationCodePanel != null)
            {
                Destroy(verificationCodePanel.gameObject);
                verificationCodePanel = null;
            }
            ShowStep(stepFinal);
        }

        /// <summary>
        /// 提示界面2最终确认，执行注销
        /// </summary>
        private async void OnFinalConfirm()
        {
            if (isSubmitting)
                return;
            isSubmitting = true;
            LoadingUI.Show();

            var requestData = new CancelAccountRequest
            {
                email = DataManager.Instance.userInfo.email,
                code = verifyCode
            };

            try
            {
                var response = await NetworkCtrl.Instance.Post<NoDataResponse>("/api/v1/user/cancel", requestData);
                LoadingUI.Hide();

                ResponseCodeHandler.HandleResponse(response,
                    onSuccess: (data) =>
                    {
                        isSubmitting = false;
                        DataManager.Instance.ClearInfo();
                        UIManager.Instance.OpenMainPage(UIManager.PageName.loginPage);
                    },
                    onError: (code, message) =>
                    {
                        isSubmitting = false;
                        // 验证码错误或已过期
                        if (code == 603)
                        {
                            ToastUI.Show("100342");
                        }
                        // 其他原因注销失败
                        else
                        {
                            ToastUI.Show("100343");
                        }
                        // 回到注销账号页最初状态（提示界面1）
                        verifyCode = "";
                        ShowStep(stepConfirm);
                    }
                );
            }
            catch (Exception ex)
            {
                LoadingUI.Hide();
                isSubmitting = false;
                Debug.LogError("注销账号异常: " + ex.Message);
                ToastUI.ShowText(ex.Message);
            }
        }

        public void OnBack()
        {
            UIManager.Instance.RegisterBackAction(onBackCallback);
            Destroy(gameObject);
        }
    }
}