@page "/modules"
@inject TelegramPanel.Web.Modules.ModuleInstallerService ModuleInstaller
@inject TelegramPanel.Web.Modules.ModuleContributionRegistry Contributions
@inject TelegramPanel.Web.Services.AppRestartService Restart
@inject ISnackbar Snackbar
@inject IDialogService DialogService
@using Microsoft.AspNetCore.Components.Forms
@using TelegramPanel.Modules
@using TelegramPanel.Web.Modules

<PageTitle>模块管理 - Telegram Panel</PageTitle>

<MudText Typo="Typo.h4" Class="mb-4">模块管理</MudText>

<MudCard Class="mb-4">
    <MudCardContent>
        <MudAlert Severity="Severity.Info" Variant="Variant.Outlined" Dense="true">
            本程序的模块会在启动时加载（不支持真正的运行时热插拔）。
            但在 Docker 部署下可开启“自动重启服务”，会由容器自动拉起（无需手动重启容器），更新体验接近热插拔。
        </MudAlert>

        <MudStack Spacing="2" Class="mt-3">
            <MudFileUpload T="IReadOnlyList<IBrowserFile>" FilesChanged="OnFilesChanged" Accept=".tpm,.zip" MaximumFileCount="1">
                <ActivatorContent>
                    <MudButton Variant="Variant.Outlined" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Upload">
                        选择模块包（.tpm/.zip）
                    </MudButton>
                </ActivatorContent>
            </MudFileUpload>

            <MudSwitch T="bool" @bind-Value="autoRestartOnChange" Color="Color.Primary"
                       Label="模块变更后自动重启服务（推荐）" />
            <MudSwitch T="bool" @bind-Value="activateAndEnableAfterInstall" Color="Color.Primary"
                       Label="上传后自动切换到新版本并启用" />

            <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2">
                <MudText Typo="Typo.body2" Class="mud-text-secondary">
                    @(selectedFile == null ? "未选择文件" : $"已选择：{selectedFile.Name}（{selectedFile.Size} bytes）")
                </MudText>
                <MudSpacer />
                <MudButton Variant="Variant.Filled" Color="Color.Primary" Disabled="@(selectedFile == null || installing)" OnClick="Install">
                    @if (installing)
                    {
                        <MudProgressCircular Size="Size.Small" Indeterminate="true" Class="mr-2" />
                        <span>上传中...</span>
                    }
                    else
                    {
                        <span>上传</span>
                    }
                </MudButton>
            </MudStack>
        </MudStack>
    </MudCardContent>
</MudCard>

<MudCard>
    <MudCardContent>
        @if (Contributions.Diagnostics.Count > 0)
        {
            <MudAlert Severity="Severity.Warning" Variant="Variant.Outlined" Dense="true" Class="mb-3">
                <MudText Typo="Typo.subtitle2">检测到模块贡献冲突（已自动忽略部分定义）：</MudText>
                <MudList T="System.String" Dense="true">
                    @foreach (var d in Contributions.Diagnostics)
                    {
                        <MudListItem T="System.String">@d</MudListItem>
                    }
                </MudList>
            </MudAlert>
        }

        <MudTable Items="@modules" Dense="true" Hover="true" Breakpoint="Breakpoint.Sm" Loading="@loading">
            <ToolBarContent>
                <MudText Typo="Typo.h6">已安装模块 (@modules.Count)</MudText>
                <MudSpacer />
                <MudButton Variant="Variant.Outlined" Color="Color.Default" StartIcon="@Icons.Material.Filled.Refresh" Disabled="@loading" OnClick="Reload">
                    刷新
                </MudButton>
            </ToolBarContent>
            <HeaderContent>
                <MudTh>模块</MudTh>
                <MudTh>版本</MudTh>
                <MudTh>状态</MudTh>
                <MudTh>操作</MudTh>
            </HeaderContent>
            <RowTemplate>
                <MudTd DataLabel="模块">
                    <MudText Typo="Typo.subtitle2">@GetDisplayName(context)</MudText>
                    <MudText Typo="Typo.caption" Class="mud-text-secondary">@context.Id</MudText>
                    @if (!string.IsNullOrWhiteSpace(context.ManifestError))
                    {
                        <MudText Typo="Typo.caption" Color="Color.Error">@context.ManifestError</MudText>
                    }
                </MudTd>
                <MudTd DataLabel="版本">
                    <MudText Typo="Typo.body2">@context.ActiveVersion</MudText>
                    @if (!string.IsNullOrWhiteSpace(context.LastGoodVersion))
                    {
                        <MudText Typo="Typo.caption" Class="mud-text-secondary">last-good: @context.LastGoodVersion</MudText>
                    }
                </MudTd>
                <MudTd DataLabel="状态">
                    <MudChip T="string" Size="Size.Small" Color="@(context.Enabled ? Color.Success : Color.Default)">
                        @(context.Enabled ? "启用" : "停用")
                    </MudChip>
                    @if (context.BuiltIn)
                    {
                        <MudChip T="string" Size="Size.Small" Color="Color.Info" Class="ml-2">内置</MudChip>
                    }
                </MudTd>
                <MudTd DataLabel="操作">
                    @if (context.Enabled)
                    {
                        <MudButton Variant="Variant.Text" Color="Color.Warning" Disabled="@loading" OnClick="@(() => Disable(context.Id))">
                            停用
                        </MudButton>
                    }
                    else
                    {
                        <MudButton Variant="Variant.Text" Color="Color.Primary" Disabled="@loading" OnClick="@(() => Enable(context.Id))">
                            启用
                        </MudButton>
                    }

                    @if (!context.BuiltIn)
                    {
                        @if (context.InstalledVersions.Count > 1)
                        {
                            <MudButton Variant="Variant.Text" Color="Color.Default" Disabled="@loading" OnClick="@(() => PruneOldVersions(context))">
                                清理旧版本
                            </MudButton>
                        }

                        <MudButton Variant="Variant.Text" Color="Color.Error" Disabled="@loading" OnClick="@(() => Remove(context.Id))">
                            删除
                        </MudButton>
                    }

                    <MudButton Variant="Variant.Text" Color="Color.Default" Disabled="@loading" OnClick="@(() => ShowDetails(context))">
                        详情
                    </MudButton>
                </MudTd>
            </RowTemplate>
            <NoRecordsContent>
                <MudText>暂无模块</MudText>
            </NoRecordsContent>
        </MudTable>
    </MudCardContent>
</MudCard>

@code
{
    private bool loading = true;
    private bool installing;
    private IBrowserFile? selectedFile;
    private List<ModuleOverview> modules = new();
    private bool autoRestartOnChange = true;
    private bool activateAndEnableAfterInstall = true;

    protected override async Task OnInitializedAsync()
    {
        await Reload();
    }

    private async Task Reload()
    {
        loading = true;
        try
        {
            var list = await ModuleInstaller.GetOverviewAsync();
            modules = list.ToList();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"加载失败：{ex.Message}", Severity.Error);
        }
        finally
        {
            loading = false;
        }
    }

    private void OnFilesChanged(IReadOnlyList<IBrowserFile> files)
    {
        selectedFile = files.FirstOrDefault();
    }

    private async Task Install()
    {
        if (selectedFile == null || installing)
            return;

        installing = true;
        try
        {
            await using var stream = selectedFile.OpenReadStream(maxAllowedSize: 50 * 1024 * 1024);
            var result = await ModuleInstaller.InstallAsync(stream, selectedFile.Name, enableAfterInstall: false);
            if (!result.Success)
            {
                Snackbar.Add($"上传失败：{result.Message}", Severity.Error);
                return;
            }

            if (activateAndEnableAfterInstall)
            {
                var moduleId = (result.ModuleId ?? "").Trim();
                var version = (result.Version ?? "").Trim();
                if (moduleId.Length == 0 || version.Length == 0)
                {
                    Snackbar.Add("上传成功，但返回的模块信息不完整（ModuleId/Version 为空）", Severity.Warning);
                    selectedFile = null;
                    await Reload();
                    return;
                }

                var setActive = await ModuleInstaller.SetActiveVersionAsync(moduleId, version);
                if (!setActive.Success)
                {
                    Snackbar.Add($"已上传：{moduleId} {version}，但切换版本失败：{setActive.Message}", Severity.Warning);
                }
                else
                {
                    var enable = await ModuleInstaller.EnableAsync(moduleId);
                    if (!enable.Success)
                    {
                        Snackbar.Add($"已上传：{moduleId} {version}，但启用失败：{enable.Message}", Severity.Warning);
                    }
                    else
                    {
                        Snackbar.Add($"已上传并启用：{moduleId} {version}", Severity.Success);

                        if (autoRestartOnChange)
                        {
                            Snackbar.Add("即将自动重启服务以应用模块变更…", Severity.Info);
                            Restart.RequestRestart(TimeSpan.FromSeconds(1), $"module install {moduleId} {version}");
                        }
                    }
                }
            }
            else
            {
                Snackbar.Add($"上传成功：{result.ModuleId} {result.Version}（请切换版本/启用并重启服务生效）", Severity.Success);
            }

            selectedFile = null;
            await Reload();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"上传异常：{ex.Message}", Severity.Error);
        }
        finally
        {
            installing = false;
        }
    }

    private async Task Enable(string id)
    {
        var r = await ModuleInstaller.EnableAsync(id);
        if (!r.Success)
        {
            Snackbar.Add($"启用失败：{r.Message}", Severity.Error);
            return;
        }

        Snackbar.Add("已启用", Severity.Success);
        if (autoRestartOnChange)
        {
            Snackbar.Add("即将自动重启服务以应用模块变更…", Severity.Info);
            Restart.RequestRestart(TimeSpan.FromSeconds(1), $"module enable {id}");
        }
        await Reload();
    }

    private async Task Disable(string id)
    {
        var r = await ModuleInstaller.DisableAsync(id);
        if (!r.Success)
        {
            Snackbar.Add($"停用失败：{r.Message}", Severity.Error);
            return;
        }

        Snackbar.Add("已停用", Severity.Success);
        if (autoRestartOnChange)
        {
            Snackbar.Add("即将自动重启服务以应用模块变更…", Severity.Info);
            Restart.RequestRestart(TimeSpan.FromSeconds(1), $"module disable {id}");
        }
        await Reload();
    }

    private async Task Remove(string id)
    {
        bool? ok = await DialogService.ShowMessageBox(
            "确认删除",
            $"确定删除模块「{id}」吗？删除会移动到回收站目录（可手动找回），但仍建议先停用并重启确认无依赖。",
            yesText: "删除", cancelText: "取消");

        if (ok != true)
            return;

        try
        {
            var r = await ModuleInstaller.RemoveModuleAsync(id);
            if (!r.Success)
            {
                Snackbar.Add(r.Message, Severity.Error);
                return;
            }

            Snackbar.Add("已删除", Severity.Success);
            if (autoRestartOnChange)
            {
                Snackbar.Add("即将自动重启服务以应用模块变更…", Severity.Info);
                Restart.RequestRestart(TimeSpan.FromSeconds(1), $"module remove {id}");
            }
            await Reload();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"删除异常：{ex.Message}", Severity.Error);
        }
    }

    private async Task PruneOldVersions(ModuleOverview m)
    {
        if (m.BuiltIn)
            return;

        var active = (m.ActiveVersion ?? "").Trim();
        var lastGood = (m.LastGoodVersion ?? "").Trim();
        var keep = new HashSet<string>(StringComparer.Ordinal);
        if (!string.IsNullOrWhiteSpace(active)) keep.Add(active);
        if (!string.IsNullOrWhiteSpace(lastGood)) keep.Add(lastGood);

        var toRemove = m.InstalledVersions
            .Where(v => !string.IsNullOrWhiteSpace(v))
            .Distinct(StringComparer.Ordinal)
            .Where(v => !keep.Contains(v))
            .ToList();

        if (toRemove.Count == 0)
        {
            Snackbar.Add("没有可清理的旧版本", Severity.Info);
            return;
        }

        bool? ok = await DialogService.ShowMessageBox(
            "清理旧版本",
            $"将删除模块「{m.Id}」的旧版本：{string.Join(", ", toRemove)}。\n" +
            $"保留版本：{string.Join(", ", keep)}。\n" +
            "删除会移动到回收站目录（可手动找回），是否继续？",
            yesText: "继续", cancelText: "取消");

        if (ok != true)
            return;

        try
        {
            var r = await ModuleInstaller.PruneOldVersionsAsync(m.Id);
            if (!r.Success)
            {
                Snackbar.Add(r.Message, Severity.Error);
                return;
            }

            Snackbar.Add("已清理旧版本", Severity.Success);
            if (autoRestartOnChange)
            {
                Snackbar.Add("即将自动重启服务以应用模块变更…", Severity.Info);
                Restart.RequestRestart(TimeSpan.FromSeconds(1), $"module prune {m.Id}");
            }
            await Reload();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"清理异常：{ex.Message}", Severity.Error);
        }
    }

    private async Task ShowDetails(ModuleOverview m)
    {
        var manifest = m.Manifest;
        var deps = manifest?.Dependencies?.Count > 0
            ? string.Join("\n", manifest.Dependencies.Select(d => $"{d.Id} {d.Range}"))
            : "-";

        var details =
            $"Id: {m.Id}\n" +
            $"Name: {manifest?.Name ?? "-"}\n" +
            $"Version: {m.ActiveVersion ?? "-"}\n" +
            $"Enabled: {m.Enabled}\n" +
            $"BuiltIn: {m.BuiltIn}\n" +
            $"InstalledVersions: {string.Join(", ", m.InstalledVersions)}\n" +
            $"Dependencies:\n{deps}\n";

        await DialogService.ShowMessageBox("模块详情", details);
    }

    private static string GetDisplayName(ModuleOverview m)
    {
        var name = (m.Manifest?.Name ?? "").Trim();
        return string.IsNullOrWhiteSpace(name) ? m.Id : name;
    }
}