// Claude Desktop — Schulungsmodus (Phase 15)
// Oeffnet separates Praesentations-Fenster + sendet Slides

use serde::{Deserialize, Serialize};
use tauri::{AppHandle, Emitter, Manager, WebviewUrl, WebviewWindowBuilder};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Slide {
    pub r#type: String,      // "mermaid" | "code" | "text"
    pub content: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub language: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub title: Option<String>,
}

#[tauri::command]
pub async fn presentation_open(app: AppHandle) -> Result<(), String> {
    // Falls Fenster bereits existiert, nach vorne holen
    if let Some(win) = app.get_webview_window("presentation") {
        let _ = win.show();
        let _ = win.set_focus();
        return Ok(());
    }

    WebviewWindowBuilder::new(&app, "presentation", WebviewUrl::App("/presentation".into()))
        .title("Claude — Schulungsmodus")
        .inner_size(1200.0, 800.0)
        .center()
        .build()
        .map_err(|e| e.to_string())?;

    Ok(())
}

#[tauri::command]
pub async fn presentation_close(app: AppHandle) -> Result<(), String> {
    if let Some(win) = app.get_webview_window("presentation") {
        let _ = win.close();
    }
    Ok(())
}

#[tauri::command]
pub async fn presentation_send_slide(app: AppHandle, slide: Slide) -> Result<(), String> {
    // Fenster oeffnen falls noch nicht offen
    if app.get_webview_window("presentation").is_none() {
        let _ = presentation_open(app.clone()).await;
        tokio::time::sleep(std::time::Duration::from_millis(400)).await;
    }

    if let Some(win) = app.get_webview_window("presentation") {
        win.emit("presentation-slide", &slide).map_err(|e| e.to_string())?;
    }
    Ok(())
}

#[tauri::command]
pub async fn presentation_clear(app: AppHandle) -> Result<(), String> {
    if let Some(win) = app.get_webview_window("presentation") {
        win.emit("presentation-clear", ()).map_err(|e| e.to_string())?;
    }
    Ok(())
}