@page "/settings"
@inject IDbContextFactory<AppDbContext> ContextFactory
@inject IOllamaService OllamaService
@inject OllamaSettings OllamaConfig
@inject NavigationManager Navigation
@inject IJSRuntime JSRuntime
@inject IProjectService ProjectService

<PageTitle>Einstellungen - Author Buddy</PageTitle>

<div class="settings-page">

    <div class="settings-section">
        <h3 class="settings-section-title">Modelle</h3>
        <div class="form-group">
            <label for="ragModel">RAG-Modell (Faktenabfrage):</label>
            <select id="ragModel" @bind="ragModel">
                @if (availableModels.Count == 0)
                {
                    <option value="">Keine Modelle gefunden</option>
                }
                @foreach (var m in availableModels)
                {
                    <option value="@m.Model1">@m.Model1</option>
                }
            </select>
        </div>
        <div class="form-group">
            <label for="styleModel">Stil-Modell (Lektorat):</label>
            <select id="styleModel" @bind="styleModel">
                @if (availableModels.Count == 0)
                {
                    <option value="">Keine Modelle gefunden</option>
                }
                @foreach (var m in availableModels)
                {
                    <option value="@m.Model1">@m.Model1</option>
                }
            </select>
        </div>
        <div class="form-group">
            <label for="spellingModel">Rechtschreibprüfungs-Modell:</label>
            <select id="spellingModel" @bind="spellingModel">
                @if (availableModels.Count == 0)
                {
                    <option value="">Keine Modelle gefunden</option>
                }
                @foreach (var m in availableModels)
                {
                    <option value="@m.Model1">@m.Model1</option>
                }
            </select>
        </div>
    </div>

    <div class="settings-section">
        <h3 class="settings-section-title">Ollama Server</h3>
        <div class="form-group">
            <label for="ollamaUrl">Server-URL:</label>
            <input id="ollamaUrl" @bind="ollamaUrl" placeholder="http://localhost:11434" />
            <div class="form-hint">Adresse des Ollama-Servers (z. B. http://192.168.1.100:11434)</div>
        </div>
    </div>

    <div class="settings-section">
        <h3 class="settings-section-title">Design</h3>
        <div class="form-group">
            <label for="themeSelect">Theme:</label>
            <select id="themeSelect" @bind="selectedTheme">
                <option value="light">Hell</option>
                <option value="dark">Dunkel</option>
                <option value="w95">W95 (Retro)</option>
            </select>
        </div>
    </div>

    <div class="settings-section">
        <h3 class="settings-section-title">Neues Projekt</h3>
        <div class="form-group">
            <label for="projectName">Projektname:</label>
            <input id="projectName" @bind="newProjectName" placeholder="Projektname" />
            <div class="form-hint">Der Projektordner wird in &quot;Dokumente\AuthorBuddy\&quot; erstellt.</div>
        </div>
        <button @onclick="CreateProject" disabled="@(string.IsNullOrWhiteSpace(newProjectName))">Projekt erstellen</button>
    </div>

    <div class="form-actions">
        <button class="primary" @onclick="SaveSettings">Speichern</button>
        <button @onclick='() => Navigation.NavigateTo("/")'>Abbrechen</button>
    </div>

    @if (!string.IsNullOrEmpty(statusMessage))
    {
        <div class="settings-status">@statusMessage</div>
    }
</div>

@code {
    private string ragModel = "llama3.2";
    private string styleModel = "llama3.2";
    private string spellingModel = "phi3:mini";
    private string selectedTheme = "light";
    private string ollamaUrl = "http://localhost:11434";
    private string newProjectName = string.Empty;
    private string statusMessage = string.Empty;
    private List<Ollama.Model> availableModels = new();

    protected override async Task OnInitializedAsync()
    {
        await using var context = await ContextFactory.CreateDbContextAsync();

        ragModel = await GetSettingAsync(context, "ollama_rag_model") ?? "llama3.2";
        styleModel = await GetSettingAsync(context, "ollama_style_model") ?? "llama3.2";
        spellingModel = await GetSettingAsync(context, "ollama_spelling_model") ?? "phi3:mini";
        selectedTheme = await GetSettingAsync(context, "theme") ?? "light";
        ollamaUrl = await GetSettingAsync(context, "ollama_url") ?? "http://localhost:11434";

        try
        {
            var models = await OllamaService.GetLocalModelsAsync();
            availableModels = models.ToList();
        }
        catch
        {
            availableModels = new();
        }
    }

    private static async Task<string?> GetSettingAsync(AppDbContext context, string key)
    {
        var setting = await context.Settings.FindAsync(key);
        return setting?.Value;
    }

    private static async Task SaveSettingAsync(AppDbContext context, string key, string value)
    {
        var existing = await context.Settings.FindAsync(key);
        if (existing != null)
        {
            existing.Value = value;
        }
        else
        {
            context.Settings.Add(new SettingEntity { Key = key, Value = value });
        }
    }

    private async Task SaveSettings()
    {
        await using var context = await ContextFactory.CreateDbContextAsync();

        await SaveSettingAsync(context, "ollama_rag_model", ragModel);
        await SaveSettingAsync(context, "ollama_style_model", styleModel);
        await SaveSettingAsync(context, "ollama_spelling_model", spellingModel);
        await SaveSettingAsync(context, "theme", selectedTheme);
        await SaveSettingAsync(context, "ollama_url", ollamaUrl);

        await context.SaveChangesAsync();

        OllamaConfig.OllamaUrl = ollamaUrl;
        OllamaConfig.ChatModel = ragModel;
        OllamaConfig.SpellingModel = spellingModel;
        await OllamaService.ReconfigureAsync(ollamaUrl);

        statusMessage = "Einstellungen gespeichert.";
        await ApplyTheme(selectedTheme);
    }

    private async Task CreateProject()
    {
        if (string.IsNullOrWhiteSpace(newProjectName)) return;

        try
        {
            string rootPath = Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
                "AuthorBuddy",
                newProjectName);

            await ProjectService.CreateNewProjectAsync(newProjectName, rootPath);
            statusMessage = $"Projekt '{newProjectName}' erstellt unter: {rootPath}";
            newProjectName = string.Empty;
        }
        catch (Exception ex)
        {
            statusMessage = $"Fehler beim Erstellen: {ex.Message}";
        }
    }

    private async Task ApplyTheme(string theme)
    {
        await JSRuntime.InvokeVoidAsync("eval",
            $"document.getElementById('theme-css')?.remove(); " +
            $"var link = document.createElement('link'); " +
            $"link.id = 'theme-css'; " +
            $"link.rel = 'stylesheet'; " +
            $"link.href = 'css/themes/{theme}.css'; " +
            $"document.head.appendChild(link);");
    }
}