@page "/quick-markdown"
@attribute [Authorize(Roles = "Administrator,Blogger")]
@inject IOllamaService OllamaService
@inject OllamaSettings Settings
@inject IJSRuntime JS
@inject IAuthService AuthService
@inject ISettingsService SettingsService
@inject IQuickMarkdownService QuickMarkdownService
@inject IPluginManager PluginManager
@inject NavigationManager Navigation
@inject IFactSearchToolService FactSearchToolService

<PageTitle>Quick Markdown</PageTitle>

<style>
    .qm-fullscreen-textarea {
        width: 100%;
        height: calc(100vh - 140px);
        font-size: 16px;
    }
    
    .qm-fullscreen-container {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1000;
        background: var(--bs-dark);
        color: var(--bs-light);
    }
    
    .qm-fullscreen-container .qm-container {
        max-width: 100%;
        margin: 0;
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    
    .qm-fullscreen-container .qm-output-panel {
        height: 40%;
        border-top: 1px solid var(--bs-gray);
    }
    
    .qm-fullscreen-container .qm-input-panel {
        height: 60%;
        overflow-y: auto;
    }
    
    .qm-fullscreen-container .qm-prompt-selector,
    .qm-fullscreen-container .qm-generate-row,
    .qm-fullscreen-container .qm-range-labels {
        display: none;
    }
</style>

<div class="qm-container">
    <h2>Quick Markdown</h2>
    <p>Erzeugt aus einem Text und einem System-Prompt direkt formatiertes Markdown – ohne Projekt oder Speicherung.</p>

    <div class="qm-layout">
        <div class="qm-input-panel">

            <div class="form-group">
                <label>Prompt-Verwaltung</label>
                <div class="qm-prompt-selector">
                    <select class="qm-prompt-select" value="@_selectedPromptId" @onchange="SwitchPrompt">
                        <option value="0">— Standard-Prompt —</option>
                        @foreach (var p in _savedPrompts)
                        {
                            <option value="@p.Id">@p.Name</option>
                        }
                    </select>
                    <button class="btn btn-sm @(_fullscreenMode ? "btn-primary" : "")" @onclick="ToggleFullscreen">Vollbild</button>
                    <button class="btn btn-sm" @onclick="ShowSavePromptDialog">+ Als Prompt speichern</button>
                    <button class="btn btn-sm" @onclick="DeleteCurrentPrompt" disabled="@(_selectedPromptId == 0)">Löschen</button>
                </div>
                @if (_showPromptNameInput)
                {
                    <div class="qm-prompt-name-row">
                        <input @bind="_newPromptName" placeholder="Name für den Prompt…" />
                        <button class="btn btn-sm btn-primary" @onclick="ConfirmSavePrompt">Speichern</button>
                        <button class="btn btn-sm" @onclick="CancelSavePrompt">Abbrechen</button>
                    </div>
                }
            </div>

            <div class="form-group">
                <label>System-Prompt</label>
                <textarea class="qm-textarea qm-prompt @(_fullscreenMode ? "qm-fullscreen-textarea" : "")" @bind="_systemPrompt" @bind:after="PersistPromptDraft" rows="4"></textarea>
            </div>

            <div class="form-group">
                <label for="tempRange">Temperatur: @_temperature.ToString("F2")</label>
                <input id="tempRange" type="range" min="0" max="2" step="0.05" @bind="_temperature" @bind:event="oninput" @bind:after="PersistPromptDraft" />
                <div class="qm-range-labels">
                    <span>präzise (0)</span>
                    <span>kreativ (2)</span>
                </div>
            </div>

            <div class="form-group">
                <label>Text</label>
                <textarea class="qm-textarea" @bind="_inputText" @bind:event="oninput" @bind:after="PersistTextDraft" rows="12" placeholder="Text hier eingeben…"></textarea>
            </div>

            <div class="qm-generate-row">
                <button class="btn btn-primary" @onclick="Generate" disabled="@_generateDisabled">
                    @if (_isBusy)
                    {
                        <span>Generiere…</span>
                    }
                    else
                    {
                        <span>Markdown erzeugen</span>
                    }
                </button>
                <button class="btn btn-sm" @onclick="SaveEntry" disabled="@_saveEntryDisabled">
                    Eingabe & Ergebnis speichern
                </button>
                <button class="btn btn-sm" @onclick="StartFactSearch" disabled="@(_isBusy || string.IsNullOrWhiteSpace(_inputText))" title="Prüft die Zeile mit [Fakt] im Text per Websuche">
                    🔍 Fakten prüfen
                </button>
            </div>
        </div>

        <div class="qm-output-panel">
            <div class="form-group">
                <label>Ausgabe</label>
                <div class="qm-output-toolbar">
                    <button class="btn btn-small" @onclick="CopyOutput" disabled="@string.IsNullOrEmpty(_output)">📋 Kopieren</button>
                    <button class="btn btn-small" @onclick="ClearOutput">🗑 Leeren</button>
                    @if (_availablePlugins.Count > 0)
                    {
                        <select @bind="_selectedPluginId" style="flex:1;max-width:180px;font-size:12px;">
                            <option value="">Export via Plugin…</option>
                            @foreach (var p in _availablePlugins)
                            {
                                <option value="@p.Id">@p.Name</option>
                            }
                        </select>
                        <button class="btn btn-small btn-primary" @onclick="ExportViaPlugin" disabled="@(_selectedPluginId == "" || string.IsNullOrEmpty(_output) || _isExporting)">
                            @(_isExporting ? "Exportiere…" : "Export")
                        </button>
                    }
                </div>
                @if (!string.IsNullOrEmpty(_exportResult))
                {
                    <div class="qm-notice" style="margin-top:4px;font-size:12px;">@_exportResult</div>
                }
            </div>
            <textarea class="qm-textarea qm-output" @bind="_output" rows="30" readonly></textarea>
        </div>
    </div>

    @if (_savedEntries.Count > 0)
    {
        <div class="qm-saved-list">
            <h4>Gespeicherte Texte</h4>
            @foreach (var e in _savedEntries)
            {
                <div class="qm-saved-item" @onclick="() => LoadEntry(e.Id)">
                    <div class="qm-saved-meta">
                        <span class="qm-saved-date">@e.Timestamp.ToLocalTime().ToString("g")</span>
                        <span class="qm-saved-preview">@(e.InputText.Length > 60 ? e.InputText[..60] + "…" : e.InputText)</span>
                    </div>
                    <button class="btn btn-sm" @onclick="() => DeleteEntry(e.Id)" title="Löschen">🗑</button>
                </div>
            }
        </div>
    }

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

    @if (!string.IsNullOrEmpty(_modelNotice))
    {
        <div class="qm-notice">@_modelNotice</div>
    }

    @if (_showFactSearch)
    {
        <div class="qm-fact-drawer">
            <div class="qm-fact-drawer-header">
                <span>🔍 Fakten prüfen</span>
                <button class="btn btn-sm" @onclick="CloseFactSearch">✕</button>
            </div>
            <div class="qm-fact-drawer-body">
                <div class="form-group">
                    <label>Behauptung</label>
                    <div class="qm-fact-claim">@_factText</div>
                </div>
                <div class="form-group">
                    <label for="factQuery">Suchanfrage</label>
                    <div class="qm-fact-query-row">
                        <input id="factQuery" @bind="_searchQuery" @bind:event="oninput"
                               placeholder="Suchanfrage bearbeiten…" />
                        <button class="btn btn-sm btn-primary" @onclick="RunFactSearch"
                                disabled="@(_factSearching || string.IsNullOrWhiteSpace(_searchQuery))">
                            Suchen
                        </button>
                    </div>
                    <button class="btn btn-sm" @onclick="RegenerateFactQuery" disabled="@_factSearching">
                        Anfrage neu generieren
                    </button>
                </div>

                @if (_factSearching)
                {
                    <div class="qm-fact-loading">Suche läuft…</div>
                }
                @if (!string.IsNullOrEmpty(_factSearchError))
                {
                    <div class="qm-fact-error">@_factSearchError</div>
                }
                @if (_factResults.Count > 0)
                {
                    <div class="qm-fact-results">
                        @foreach (var r in _factResults)
                        {
                            <div class="qm-fact-result">
                                <a href="@r.Url" target="_blank" rel="noopener noreferrer">@r.Title</a>
                                @if (!string.IsNullOrEmpty(r.Snippet))
                                {
                                    <div class="qm-fact-snippet">@r.Snippet</div>
                                }
                                <div class="qm-fact-result-actions">
                                    <button class="btn btn-sm btn-primary" @onclick="() => SelectFactResult(r)"
                                            disabled="@_factSummarizing">
                                        @(_factSummarizing ? "Fasse zusammen…" : "Übernehmen")
                                    </button>
                                </div>
                            </div>
                        }
                    </div>
                }
                else if (!_factSearching && _factSearchSearched && _factSearchError.Length == 0)
                {
                    <div class="qm-fact-hint">Keine Ergebnisse gefunden. Versuche die Suchanfrage anzupassen.</div>
                }
                else if (!_factSearching && !_factSearchSearched)
                {
                    <div class="qm-fact-hint">Klicke auf „Suchen", um Ergebnisse zu laden.</div>
                }
            </div>
        </div>
    }
</div>

@code {
    private const string DraftKeyText = "qm_draft_text";
    private const string DraftKeyPrompt = "qm_draft_prompt";
    private const string DraftKeyTemp = "qm_draft_temp";
    private const string DraftKeyPromptId = "qm_draft_prompt_id";

    private bool _fullscreenMode;
    private string _systemPrompt = string.Empty;
    private string _inputText = string.Empty;
    private string _output = string.Empty;
    private string _error = string.Empty;
    private string _modelNotice = string.Empty;
    private bool _isBusy;
    private bool _generateDisabled => _isBusy || string.IsNullOrWhiteSpace(_inputText);
    private bool _saveEntryDisabled => string.IsNullOrWhiteSpace(_inputText) && string.IsNullOrWhiteSpace(_output);
    private double _temperature = 0.3;
    private int _userId;
    private List<QuickMarkdownEntry> _savedEntries = new();
    private List<QuickMarkdownPrompt> _savedPrompts = new();
    private int _selectedPromptId;
    private bool _showPromptNameInput;
    private string _newPromptName = string.Empty;
    private List<IExportPlugin> _availablePlugins = new();
    private string _selectedPluginId = string.Empty;
    private bool _isExporting;
    private string _exportResult = string.Empty;
    private bool _draftRestored;
    private bool _showFactSearch;
    private bool _factSearching;
    private bool _factSearchSearched;
    private bool _factSummarizing;
    private string _factSearchError = string.Empty;
    private string _factLine = string.Empty;
    private string _factText = string.Empty;
    private string _searchQuery = string.Empty;
    private List<FactSearchResult> _factResults = new();

    protected override async Task OnInitializedAsync()
    {
        var user = await AuthService.GetCurrentUserAsync();
        if (user == null || !user.HasAnyRole(UserRole.Administrator, UserRole.Blogger))
        {
            Navigation.NavigateTo("/");
            return;
        }
        _userId = user.Id;

        _savedPrompts = await QuickMarkdownService.GetPromptsAsync(_userId);
        _systemPrompt = await SettingsService.GetQuickMarkdownPromptAsync()
            ?? Settings.GetQuickMarkdownDefaultPrompt(Settings.Language);
        _temperature = await SettingsService.GetQuickMarkdownTempAsync();
        _savedEntries = await QuickMarkdownService.GetAllAsync(_userId);
        _availablePlugins = PluginManager.GetPlugins().ToList();

        Navigation.LocationChanged += OnLocationChanged;

        _modelNotice = $"Verwendetes Modell: {Settings.StyleModel} (via {Settings.Backend})";
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender && !_draftRestored)
        {
            _draftRestored = true;
            await RestoreDraftAsync();
            await InvokeAsync(StateHasChanged);
        }
    }

    public void Dispose()
    {
        Navigation.LocationChanged -= OnLocationChanged;
    }

    private void OnLocationChanged(object? sender, LocationChangedEventArgs e)
    {
        _ = PersistDraftAsync();
    }

    private async Task PersistTextDraft()
    {
        await JS.InvokeVoidAsync("localStorage.setItem", DraftKeyText, _inputText ?? string.Empty);
    }

    private async Task PersistPromptDraft()
    {
        await JS.InvokeVoidAsync("localStorage.setItem", DraftKeyPrompt, _systemPrompt ?? string.Empty);
        await JS.InvokeVoidAsync("localStorage.setItem", DraftKeyTemp, _temperature.ToString(System.Globalization.CultureInfo.InvariantCulture));
        await JS.InvokeVoidAsync("localStorage.setItem", DraftKeyPromptId, _selectedPromptId.ToString());
    }

    private async Task PersistDraftAsync()
    {
        await PersistTextDraft();
        await PersistPromptDraft();
    }

    private async Task RestoreDraftAsync()
    {
        var text = await JS.InvokeAsync<string>("localStorage.getItem", DraftKeyText);
        if (!string.IsNullOrEmpty(text))
            _inputText = text;

        var promptIdStr = await JS.InvokeAsync<string>("localStorage.getItem", DraftKeyPromptId);
        if (int.TryParse(promptIdStr, out var promptId) && _savedPrompts.Any(p => p.Id == promptId))
        {
            _selectedPromptId = promptId;
            var prompt = _savedPrompts.First(p => p.Id == promptId);
            _systemPrompt = prompt.PromptText;
            _temperature = prompt.Temperature;
        }
        else
        {
            var prompt = await JS.InvokeAsync<string>("localStorage.getItem", DraftKeyPrompt);
            if (!string.IsNullOrEmpty(prompt))
                _systemPrompt = prompt;

            var tempStr = await JS.InvokeAsync<string>("localStorage.getItem", DraftKeyTemp);
            if (double.TryParse(tempStr, System.Globalization.CultureInfo.InvariantCulture, out var temp))
                _temperature = temp;
        }
    }

    private async Task SwitchPrompt(ChangeEventArgs e)
    {
        var id = int.Parse(e.Value?.ToString() ?? "0");
        _selectedPromptId = id;
        if (id == 0)
        {
            _systemPrompt = Settings.GetQuickMarkdownDefaultPrompt(Settings.Language);
            _temperature = Settings.QuickMarkdownTemp;
        }
        else
        {
            var prompt = _savedPrompts.FirstOrDefault(p => p.Id == id);
            if (prompt != null)
            {
                _systemPrompt = prompt.PromptText;
                _temperature = prompt.Temperature;
            }
        }

        await PersistPromptDraft();
    }

    private void ShowSavePromptDialog()
    {
        _newPromptName = string.Empty;
        _showPromptNameInput = true;
    }

    private async Task ConfirmSavePrompt()
    {
        if (string.IsNullOrWhiteSpace(_newPromptName))
            return;

        if (_fullscreenMode && _selectedPromptId > 0)
        {
            var prompt = _savedPrompts.FirstOrDefault(p => p.Id == _selectedPromptId);
            if (prompt != null)
            {
                prompt.PromptText = _systemPrompt;
                prompt.Temperature = _temperature;
                prompt.Timestamp = DateTime.UtcNow;
                await QuickMarkdownService.SavePromptAsync(prompt);
                _selectedPromptId = prompt.Id;
            }
        }
        else
        {
            var existing = _savedPrompts.FirstOrDefault(p =>
                p.Name == _newPromptName && p.Id != _selectedPromptId);
            if (existing != null)
            {
                existing.PromptText = _systemPrompt;
                existing.Temperature = _temperature;
                existing.Timestamp = DateTime.UtcNow;
                await QuickMarkdownService.SavePromptAsync(existing);
                _selectedPromptId = existing.Id;
            }
            else
            {
                var prompt = new QuickMarkdownPrompt
                {
                    UserId = _userId,
                    Name = _newPromptName,
                    PromptText = _systemPrompt,
                    Temperature = _temperature,
                    Timestamp = DateTime.UtcNow
                };
                await QuickMarkdownService.SavePromptAsync(prompt);
                _selectedPromptId = prompt.Id;
            }
        }

        _savedPrompts = await QuickMarkdownService.GetPromptsAsync(_userId);
        _showPromptNameInput = false;
        _newPromptName = string.Empty;

        await PersistPromptDraft();
    }

    private void CancelSavePrompt()
    {
        _showPromptNameInput = false;
        _newPromptName = string.Empty;
    }

    private void ToggleFullscreen()
    {
        _fullscreenMode = !_fullscreenMode;
    }

    private async Task DeleteCurrentPrompt()
    {
        if (_selectedPromptId == 0)
            return;

        await QuickMarkdownService.DeletePromptAsync(_selectedPromptId);
        _savedPrompts = await QuickMarkdownService.GetPromptsAsync(_userId);
        _selectedPromptId = 0;
        _systemPrompt = Settings.GetQuickMarkdownDefaultPrompt(Settings.Language);
        _temperature = Settings.QuickMarkdownTemp;

        await PersistPromptDraft();
    }

    private async Task SaveEntry()
    {
        if (string.IsNullOrWhiteSpace(_inputText) && string.IsNullOrWhiteSpace(_output))
            return;

        var entry = new QuickMarkdownEntry
        {
            UserId = _userId,
            InputText = _inputText,
            OutputText = _output,
            SystemPrompt = _systemPrompt,
            Temperature = _temperature,
            Timestamp = DateTime.UtcNow
        };
        await QuickMarkdownService.SaveAsync(entry);
        _savedEntries = await QuickMarkdownService.GetAllAsync(_userId);
    }

    private async Task LoadEntry(int id)
    {
        var entry = await QuickMarkdownService.GetByIdAsync(id);
        if (entry == null) return;

        _inputText = entry.InputText;
        _output = entry.OutputText;

        if (!string.IsNullOrEmpty(entry.SystemPrompt))
        {
            _systemPrompt = entry.SystemPrompt;
            _temperature = entry.Temperature;
        }

        await PersistDraftAsync();
    }

    private async Task DeleteEntry(int id)
    {
        await QuickMarkdownService.DeleteAsync(id);
        _savedEntries = await QuickMarkdownService.GetAllAsync(_userId);
    }

    private async Task Generate()
    {
        if (string.IsNullOrWhiteSpace(_inputText)) return;

        await PersistDraftAsync();

        _isBusy = true;
        _error = string.Empty;
        _output = string.Empty;

        try
        {
            var result = await OllamaService.Chat(Settings.StyleModel, _inputText, _systemPrompt, _temperature, Settings.StyleBackend);
            _output = result;
        }
        catch (Exception ex)
        {
            _error = $"Fehler bei der Generierung: {ex.Message}";
        }
        finally
        {
            _isBusy = false;
        }
    }

    private async Task CopyOutput()
    {
        if (string.IsNullOrEmpty(_output)) return;
        await JS.InvokeVoidAsync("navigator.clipboard.writeText", _output);
    }

    private void ClearOutput()
    {
        _output = string.Empty;
        _error = string.Empty;
    }

    private async Task StartFactSearch()
    {
        if (_isBusy || string.IsNullOrWhiteSpace(_inputText)) return;

        var found = FindFirstFact(_inputText);
        if (found == null)
        {
            _error = "Keine Zeile mit [Fakt] gefunden. Schreibe in eine Zeile z.B.: [Fakt] Paris ist die Hauptstadt von Frankreich.";
            return;
        }

        _error = string.Empty;
        _factLine = found.Value.Line;
        _factText = found.Value.Fact;
        _showFactSearch = true;
        _factResults = new();
        _factSearchError = string.Empty;
        _factSearchSearched = false;

        _factSearching = true;
        await InvokeAsync(StateHasChanged);
        try
        {
            _searchQuery = await FactSearchToolService.CreateSearchQueryAsync(_factText);
            await SearchCoreAsync();
        }
        catch (Exception ex)
        {
            _factSearchError = $"Fehler: {ex.Message}";
        }
        finally
        {
            _factSearching = false;
        }
    }

    private async Task RunFactSearch()
    {
        if (_factSearching || string.IsNullOrWhiteSpace(_searchQuery)) return;

        _factSearching = true;
        _factSearchError = string.Empty;
        _factSearchSearched = false;
        await InvokeAsync(StateHasChanged);
        try
        {
            await SearchCoreAsync();
        }
        catch (Exception ex)
        {
            _factSearchError = $"Fehler: {ex.Message}";
        }
        finally
        {
            _factSearching = false;
        }
    }

    private async Task RegenerateFactQuery()
    {
        if (_factSearching) return;

        _factSearching = true;
        _factSearchError = string.Empty;
        await InvokeAsync(StateHasChanged);
        try
        {
            _searchQuery = await FactSearchToolService.CreateSearchQueryAsync(_factText);
            _factSearchSearched = false;
            await SearchCoreAsync();
        }
        catch (Exception ex)
        {
            _factSearchError = $"Fehler: {ex.Message}";
        }
        finally
        {
            _factSearching = false;
        }
    }

    private async Task SearchCoreAsync()
    {
        _factResults = await FactSearchToolService.SearchAsync(_searchQuery);
        _factSearchSearched = true;
    }

    private async Task SelectFactResult(FactSearchResult result)
    {
        if (_factSummarizing) return;

        _factSummarizing = true;
        _factSearchError = string.Empty;
        await InvokeAsync(StateHasChanged);
        try
        {
            if (!string.IsNullOrWhiteSpace(result.Url))
                await JS.InvokeVoidAsync("window.open", result.Url, "_blank");

            var info = string.IsNullOrWhiteSpace(result.Snippet) ? result.Title : result.Snippet;
            var summary = await FactSearchToolService.SummarizeAsync(_searchQuery, info, result.Url);

            var replacement = string.IsNullOrWhiteSpace(summary)
                ? $"({result.Title}, Quelle: {result.Url})"
                : $"{summary} (Quelle: {result.Url})";

            _inputText = _inputText.Replace(_factLine, replacement);
            await PersistDraftAsync();
            _showFactSearch = false;
        }
        catch (Exception ex)
        {
            _factSearchError = $"Fehler: {ex.Message}";
        }
        finally
        {
            _factSummarizing = false;
        }
    }

    private void CloseFactSearch()
    {
        _showFactSearch = false;
    }

    private static (string Line, string Fact)? FindFirstFact(string text)
    {
        if (string.IsNullOrEmpty(text)) return null;

        foreach (var line in text.Split('\n'))
        {
            var idx = line.IndexOf("[Fakt]", StringComparison.OrdinalIgnoreCase);
            if (idx < 0) continue;

            var fact = line.Remove(idx, "[Fakt]".Length);
            fact = fact.Trim().TrimEnd('.', '!', '?', ':', ';', ',', '-').Trim();

            if (!string.IsNullOrWhiteSpace(fact))
                return (line, fact);
        }
        return null;
    }

    private async Task ExportViaPlugin()
    {
        if (string.IsNullOrEmpty(_selectedPluginId) || string.IsNullOrEmpty(_output)) return;

        var plugin = PluginManager.GetPlugin(_selectedPluginId);
        if (plugin == null) return;

        _isExporting = true;
        _exportResult = string.Empty;

        try
        {
            var title = _inputText.Length > 80 ? _inputText[..80] + "…" : _inputText;
            title = string.IsNullOrWhiteSpace(title) ? "Quick Markdown Export" : title;

            var context = new ExportPluginContext
            {
                Title = title,
                Content = _output
            };

            var result = await plugin.ExportAsync(context);
            _exportResult = result.Message;
        }
        catch (Exception ex)
        {
            _exportResult = $"Fehler: {ex.Message}";
        }
        finally
        {
            _isExporting = false;
        }
    }
}