@page "/logs"
@attribute [Authorize]
@rendermode InteractiveServer
@inject LogService LogService
@inject IJSRuntime JSRuntime

<PageTitle>Logs</PageTitle>

<h1>System-Logs</h1>

<div class="row mb-3">
    <div class="col-md-4">
        <label class="form-label">Log-Datei</label>
        <select class="form-select" @bind="_selectedFileName" @bind:after="LoadSelectedLog">
            @if (_logFiles.Count == 0)
            {
                <option value="">Keine Logs vorhanden</option>
            }
            else
            {
                @foreach (var file in _logFiles)
                {
                    <option value="@Path.GetFileName(file)">@Path.GetFileName(file)</option>
                }
            }
        </select>
    </div>
    <div class="col-md-2">
        <label class="form-label">Zeilen</label>
        <select class="form-select" @bind="_maxLines" @bind:after="LoadSelectedLog">
            <option value="100">100</option>
            <option value="500">500</option>
            <option value="1000">1000</option>
            <option value="5000">5000</option>
        </select>
    </div>
    <div class="col-md-6 d-flex align-items-end">
        <button class="btn btn-outline-secondary me-2" @onclick="LoadSelectedLog">Aktualisieren</button>
        <button class="btn btn-outline-primary" @onclick="DownloadLog">Herunterladen</button>
    </div>
</div>

<div class="card">
    <div class="card-header d-flex justify-content-between align-items-center">
        <span>Log-Ausgabe</span>
        <span class="badge bg-secondary">@_logContent.Split('\n').Length Zeilen</span>
    </div>
    <div class="card-body p-0">
        <pre class="m-0 p-3 bg-dark text-light" style="max-height: 70vh; overflow: auto; font-size: 0.85rem;"><code>@_logContent</code></pre>
    </div>
</div>

@code {
    private List<string> _logFiles = new();
    private string _selectedFileName = "";
    private int _maxLines = 1000;
    private string _logContent = "Keine Log-Datei ausgewählt.";

    protected override void OnInitialized()
    {
        LoadLogFiles();
    }

    private void LoadLogFiles()
    {
        _logFiles = LogService.GetLogFiles();
        if (_logFiles.Any() && string.IsNullOrEmpty(_selectedFileName))
        {
            _selectedFileName = Path.GetFileName(_logFiles.First());
            LoadSelectedLog();
        }
    }

    private void LoadSelectedLog()
    {
        if (string.IsNullOrEmpty(_selectedFileName))
        {
            _logContent = "Keine Log-Datei ausgewählt.";
            return;
        }

        _logContent = LogService.ReadLogFile(_selectedFileName, _maxLines);
    }

    private async Task DownloadLog()
    {
        if (string.IsNullOrEmpty(_selectedFileName))
            return;

        var content = LogService.ReadLogFile(_selectedFileName, int.MaxValue);
        var bytes = System.Text.Encoding.UTF8.GetBytes(content);
        var base64 = Convert.ToBase64String(bytes);

        await JSRuntime.InvokeVoidAsync("downloadFileFromBase64", _selectedFileName, base64, "text/plain");
    }
}