using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using EveryPublish.Client.Models;
using EveryPublish.Client.Services;

namespace EveryPublish.Client.Pages;

public sealed partial class ChallengesPage : Page
{
    private ClientContext _ctx = null!;
    private DispatcherTimer? _timer;
    private ChallengeItem? _selected;

    public ChallengesPage()
    {
        InitializeComponent();
        _timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };
        _timer.Tick += async (s, e) => await RefreshAsync();
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        _ctx = (ClientContext)e.Parameter;
        _ctx.Core.ReloadLocalJson();
        _timer?.Start();
        _ = RefreshAsync();
    }

    protected override void OnNavigatedFrom(NavigationEventArgs e)
    {
        _timer?.Stop();
    }

    private async Task RefreshAsync()
    {
        var list = await _ctx.Core.GetChallengesAsync();
        ChallengeList.ItemsSource = list;
        EmptyText.Visibility = list.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
        if (_selected == null)
        {
            SolvePanel.Visibility = Visibility.Collapsed;
        }
    }

    private void ChallengeList_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        _selected = ChallengeList.SelectedItem as ChallengeItem;
        if (_selected == null)
        {
            SolvePanel.Visibility = Visibility.Collapsed;
            return;
        }
        SolvePanel.Visibility = Visibility.Visible;
        SolveHint.Text = _selected.Kind switch
        {
            "qr" => "扫码挑战（请在对应平台 App 扫码；完成后点击「我已确认」提交）",
            _ => "输入收到的验证码 / 确认值",
        };
        // 二维码展示：qrUrl 为 http URL 或 file:// 本地路径
        var qr = !string.IsNullOrEmpty(_selected.QrUrl) ? _selected.QrUrl : _selected.QrToken;
        if (!string.IsNullOrEmpty(qr) && (qr.StartsWith("http") || qr.StartsWith("file://")))
        {
            QrImage.Source = new Microsoft.UI.Xaml.Media.Imaging.BitmapImage(new Uri(qr));
            QrImage.Visibility = Visibility.Visible;
        }
        else
        {
            QrImage.Visibility = Visibility.Collapsed;
        }
        ValueBox.Text = "";
        SolveResult.Text = "";
    }

    private async void Solve_Click(object sender, RoutedEventArgs e)
    {
        if (_selected == null) return;
        var value = ValueBox.Text.Trim();
        if (_selected.Kind == "qr" && string.IsNullOrEmpty(value))
        {
            value = "confirmed";
        }
        if (string.IsNullOrEmpty(value))
        {
            SolveResult.Text = "请输入验证码";
            return;
        }
        SolveButton.IsEnabled = false;
        var (ok, message) = await _ctx.Core.SolveAsync(_selected.ChallengeId, value);
        SolveButton.IsEnabled = true;
        SolveResult.Text = ok ? "已提交，等待服务器确认" : message;
        if (ok)
        {
            _selected = null;
            await RefreshAsync();
        }
    }
}