@page "/channels/create"
@inject IChannelService ChannelService
@inject AccountManagementService AccountManagement
@inject TelegramPanel.Core.Services.AccountRiskService RiskService
@inject ChannelManagementService ChannelManagement
@inject ChannelGroupManagementService ChannelGroupManagement
@inject ISnackbar Snackbar
@inject NavigationManager Navigation
@inject IDialogService DialogService
@using TelegramPanel.Data.Entities
@using TelegramPanel.Web.Components.Dialogs

<PageTitle>创建频道 - Telegram Panel</PageTitle>

<MudText Typo="Typo.h4" Class="mb-4">创建频道</MudText>

<MudGrid>
    <MudItem xs="12" md="8" Class="mx-auto">
        <MudCard>
            <MudCardContent>
                <MudSelect @bind-Value="selectedAccountId" Label="选择账号" Variant="Variant.Outlined" Required="true">
                    <MudSelectItem Value="0">-- 请选择账号 --</MudSelectItem>
                    @foreach (var account in accounts)
                    {
                        <MudSelectItem Value="@account.Id">@FormatAccountLabel(account)</MudSelectItem>
                    }
                </MudSelect>

                <MudSelect @bind-Value="selectedGroupId" Label="频道分组" Variant="Variant.Outlined" Class="mt-4">
                    <MudSelectItem Value="0">未分组</MudSelectItem>
                    @foreach (var group in channelGroups)
                    {
                        <MudSelectItem Value="@group.Id">@group.Name</MudSelectItem>
                    }
                </MudSelect>

                <MudTextField @bind-Value="channelTitle" Label="频道名称" Variant="Variant.Outlined" Required="true" Class="mt-4"
                              HelperText="最多255个字符" MaxLength="255" />

                <MudTextField @bind-Value="channelAbout" Label="频道简介" Variant="Variant.Outlined" Lines="3" Class="mt-4"
                              HelperText="最多255个字符" MaxLength="255" />

                <MudSwitch @bind-Value="isPublic" Label="设为公开频道" Color="Color.Primary" Class="mt-4" />

                @if (isPublic)
                {
                    <MudTextField @bind-Value="username" Label="频道用户名" Variant="Variant.Outlined" Class="mt-3"
                                  Adornment="Adornment.Start" AdornmentText="&#64;" Required="true"
                                  HelperText="5-32个字符,只能包含a-z、0-9和下划线" />
                }

                <MudDivider Class="my-4" />

                <MudText Typo="Typo.h6" Class="mb-3">可选设置</MudText>

                <MudSwitch @bind-Value="allowForwarding" Label="允许转发" Color="Color.Primary"
                           HelperText="关闭后为“保护内容”，禁止转发/保存（等同 Telegram 的内容保护）" />
            </MudCardContent>
            <MudCardActions>
                <MudButton Variant="Variant.Text" Color="Color.Default"
                           OnClick="@(async (MouseEventArgs _) => await Cancel())">取消</MudButton>
                <MudSpacer />
                <MudButton Variant="Variant.Filled" Color="Color.Primary"
                           Disabled="@(selectedAccountId == 0 || string.IsNullOrEmpty(channelTitle) || creating)"
                           OnClick="@(async (MouseEventArgs _) => await CreateChannel())">
                    @if (creating)
                    {
                        <MudProgressCircular Size="Size.Small" Indeterminate="true" Class="mr-2" />
                        <span>创建中...</span>
                    }
                    else
                    {
                        <span>创建频道</span>
                    }
                </MudButton>
            </MudCardActions>
        </MudCard>
    </MudItem>
</MudGrid>

@code {
    private List<Account> accounts = new();
    private List<ChannelGroup> channelGroups = new();
    private int selectedAccountId = 0;
    private int selectedGroupId = 0;
    private string channelTitle = "";
    private string channelAbout = "";
    private bool isPublic = false;
    private string username = "";
    private bool allowForwarding = true;
    private bool creating = false;

    protected override async Task OnInitializedAsync()
    {
        await LoadAccounts();
        await LoadGroups();
    }

    private async Task LoadAccounts()
    {
        try
        {
            var accountList = await AccountManagement.GetActiveAccountsAsync();
            accounts = accountList
                .Where(a => a.Category?.ExcludeFromOperations != true)
                .ToList();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"加载账号列表失败：{ex.Message}", Severity.Error);
        }
    }

    private async Task LoadGroups()
    {
        try
        {
            var groups = await ChannelGroupManagement.GetAllGroupsAsync();
            channelGroups = groups.ToList();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"加载频道分组失败：{ex.Message}", Severity.Error);
        }
    }

    private async Task CreateChannel()
    {
        if (selectedAccountId == 0)
        {
            Snackbar.Add("请选择账号", Severity.Error);
            return;
        }

        if (string.IsNullOrEmpty(channelTitle))
        {
            Snackbar.Add("请输入频道名称", Severity.Error);
            return;
        }

        if (isPublic && string.IsNullOrEmpty(username))
        {
            Snackbar.Add("公开频道需要设置用户名", Severity.Error);
            return;
        }

        // 风控检查：创建频道是敏感操作
        var account = await AccountManagement.GetAccountAsync(selectedAccountId);
        if (account != null)
        {
            var riskCheck = RiskService.CheckLoginDuration(account);
            if (riskCheck.IsRisky)
            {
                var parameters = new DialogParameters
                {
                    ["Message"] = riskCheck.Message,
                    ["DetailedMessage"] = riskCheck.DetailedMessage,
                    ["ShowRecommendations"] = true
                };
                var options = new DialogOptions { CloseOnEscapeKey = true, MaxWidth = MaxWidth.Medium };
                var dialog = DialogService.Show<RiskWarningDialog>("风控警告", parameters, options);
                var result = await dialog.Result;
                if (result.Canceled)
                    return; // 用户取消操作
            }
        }

        creating = true;

        try
        {
            // 调用 Telegram API 创建频道
            var channelInfo = await ChannelService.CreateChannelAsync(selectedAccountId, channelTitle, channelAbout, isPublic);

            // 如果是公开频道，设置用户名
            if (isPublic && !string.IsNullOrEmpty(username))
            {
                await ChannelService.SetChannelVisibilityAsync(selectedAccountId, channelInfo.TelegramId, true, username);
            }

            // 是否允许转发（关闭=保护内容）
            if (!allowForwarding)
            {
                await ChannelService.SetForwardingAllowedAsync(selectedAccountId, channelInfo.TelegramId, allowed: false);
            }

            // 保存到数据库
            var channel = new Channel
            {
                TelegramId = channelInfo.TelegramId,
                AccessHash = channelInfo.AccessHash,
                Title = channelTitle,
                Username = isPublic ? username : null,
                IsBroadcast = channelInfo.IsBroadcast,
                MemberCount = channelInfo.MemberCount,
                About = channelAbout,
                CreatorAccountId = selectedAccountId,
                GroupId = selectedGroupId > 0 ? selectedGroupId : null,
                CreatedAt = DateTime.UtcNow,
                SyncedAt = DateTime.UtcNow
            };

            await ChannelManagement.CreateOrUpdateChannelAsync(channel);

            Snackbar.Add($"频道 \"{channelTitle}\" 创建成功", Severity.Success);
            Navigation.NavigateTo("/channels");
        }
        catch (Exception ex)
        {
            Snackbar.Add($"创建失败：{ex.Message}", Severity.Error);
        }
        finally
        {
            creating = false;
        }
    }

    private Task Cancel()
    {
        Navigation.NavigateTo("/channels");
        return Task.CompletedTask;
    }

    private static string FormatAccountLabel(Account account)
    {
        var nickname = string.IsNullOrWhiteSpace(account.Nickname) ? null : account.Nickname.Trim();
        var username = string.IsNullOrWhiteSpace(account.Username) ? null : account.Username.Trim();

        var namePart = nickname ?? account.Phone;
        if (!string.IsNullOrWhiteSpace(username))
            return $"{namePart} (@{username})";
        return namePart;
    }
}