@page "/duplicates"
@attribute [Authorize]
@inject IUserSessionService Session
@inject ISessionManager SessionMgr
@inject IElevationCoordinator Elevation
@inject IDuplicatesService DupSvc
@inject DuplicatesCsvExportService CsvExport
@inject DuplicatesHtmlExportService HtmlExport
@inject WebExportService WebExport
@rendermode InteractiveServer

<h1 class="page-title">Duplicate Detection</h1>

@if (!Session.HasProfile) { <NoProfilePrompt /> return; }

<div class="card">
    <div class="form-row">
        <div class="form-group">
            <label class="form-label">Site URL</label>
            <input class="form-input" @bind="_siteUrl" placeholder="@Session.CurrentProfile!.TenantUrl" />
        </div>
        <div class="form-group">
            <label class="form-label">Mode</label>
            <select class="form-select" @bind="_mode" style="width:120px">
                <option value="Files">Files</option>
                <option value="Folders">Folders</option>
            </select>
        </div>
        <div class="form-group">
            <label class="form-label">Library (optional)</label>
            <input class="form-input" @bind="_library" />
        </div>
    </div>
    <div class="flex-row">
        <label><input type="checkbox" @bind="_matchSize" /> Match size</label>
        <label><input type="checkbox" @bind="_matchCreated" /> Match created</label>
        <label><input type="checkbox" @bind="_matchModified" /> Match modified</label>
        @if (_mode == "Folders")
        {
            <label><input type="checkbox" @bind="_matchFolderCount" /> Match subfolder count</label>
            <label><input type="checkbox" @bind="_matchFileCount" /> Match file count</label>
        }
    </div>
    <div class="flex-row mt-8">
        <button class="btn btn-primary" @onclick="RunScan" disabled="@_running">
            @(_running ? "Scanning…" : "Find Duplicates")
        </button>
        @if (_running) { <button class="btn btn-secondary" @onclick="Cancel">Cancel</button> }
    </div>
    <ProgressPanel IsRunning="_running" StatusMessage="_status" Current="_current" Total="_total" />
</div>

@if (!string.IsNullOrEmpty(_error)) { <div class="alert alert-error">@_error</div> }

@if (_results.Count > 0)
{
    <div class="card">
        <div class="flex-row">
            <div class="card-title">Duplicate Groups <span class="count-badge">@_results.Count</span></div>
            <div class="spacer"></div>
            <button class="btn btn-secondary btn-sm" @onclick="ExportCsv">Export CSV</button>
            <button class="btn btn-secondary btn-sm" @onclick="ExportHtml">Export HTML</button>
        </div>
        @foreach (var g in _results.Take(100))
        {
            <div style="margin-bottom:8px;border:1px solid var(--border);border-radius:4px;overflow:hidden">
                <div style="background:#f0f0f0;padding:6px 12px;font-weight:600;font-size:13px">
                    @g.Name <span class="chip chip-blue">@g.Items.Count copies</span>
                </div>
                @foreach (var item in g.Items)
                {
                    <div style="padding:4px 12px;font-size:12px;border-top:1px solid var(--border)">
                        <span style="color:var(--text-muted)">@item.Library</span> › @item.Path
                        @if (item.SizeBytes.HasValue) { <span class="text-muted"> (@((item.SizeBytes.Value/1024.0).ToString("F1")) KB)</span> }
                    </div>
                }
            </div>
        }
        @if (_results.Count > 100) { <div class="text-muted mt-8">Showing first 100 groups. Export for all.</div> }
    </div>
}

@code {
    private string _siteUrl = string.Empty, _library = string.Empty, _mode = "Files";
    private bool _matchSize = true, _matchCreated, _matchModified, _matchFolderCount, _matchFileCount;
    private bool _running; private string _status = string.Empty, _error = string.Empty;
    private int _current, _total;
    private List<DuplicateGroup> _results = new();
    private CancellationTokenSource? _cts;

    private async Task RunScan()
    {
        _error = string.Empty; _results.Clear(); _running = true;
        _cts = new CancellationTokenSource();
        var siteUrl = string.IsNullOrWhiteSpace(_siteUrl) ? Session.CurrentProfile!.TenantUrl : _siteUrl.Trim();
        var progress = new Progress<OperationProgress>(p => { _status = p.Message; _current = p.Current; _total = p.Total; InvokeAsync(StateHasChanged); });
        try
        {
            var opts = new DuplicateScanOptions(_mode, _matchSize, _matchCreated, _matchModified, _matchFolderCount, _matchFileCount, Library: _library.TrimOrNull());
            _results = (await Elevation.RunAsync(async c =>
            {
                var ctx = await SessionMgr.GetOrCreateContextAsync(siteUrl, Session.CurrentProfile!, c);
                return await DupSvc.ScanDuplicatesAsync(ctx, opts, progress, c);
            }, _cts.Token)).ToList();
            _status = $"Found {_results.Count} duplicate groups.";
        }
        catch (OperationCanceledException) { _status = "Cancelled."; }
        catch (Exception ex) { _error = ex.Message; }
        finally { _running = false; await InvokeAsync(StateHasChanged); }
    }

    private void Cancel() => _cts?.Cancel();
    private async Task ExportCsv() { await WebExport.DownloadCsvAsync(CsvExport.BuildCsv(_results), $"duplicates_{DateTime.Now:yyyyMMdd_HHmmss}.csv"); }
    private async Task ExportHtml() { await WebExport.DownloadHtmlAsync(HtmlExport.BuildHtml(_results, Session.CurrentBranding), $"duplicates_{DateTime.Now:yyyyMMdd_HHmmss}.html"); }
}