//! Classroom generation and interaction commands
//!
//! Tauri commands for the OpenMAIC-style interactive classroom:
//! - Generate classroom (4-stage pipeline with progress events)
//! - Multi-agent chat
//! - Export (HTML/Markdown/JSON)

use std::sync::Arc;
use tokio::sync::Mutex;
use tauri::Manager;
use zclaw_kernel::generation::Classroom;

pub mod chat;
pub mod export;
pub mod generate;
pub mod persist;

// ---------------------------------------------------------------------------
// Shared state types
// ---------------------------------------------------------------------------

/// In-memory classroom store: classroom_id → Classroom
pub type ClassroomStore = Arc<Mutex<std::collections::HashMap<String, Classroom>>>;

/// Active generation tasks: topic → progress
pub type GenerationTasks = Arc<Mutex<std::collections::HashMap<String, zclaw_kernel::generation::GenerationProgress>>>;

// Re-export chat state type
// Re-export chat state type — used by lib.rs to construct managed state
#[allow(unused_imports)]
pub use chat::ChatStore;
pub use persist::ClassroomPersistence;

// ---------------------------------------------------------------------------
// State constructors
// ---------------------------------------------------------------------------

pub fn create_classroom_state() -> ClassroomStore {
    Arc::new(Mutex::new(std::collections::HashMap::new()))
}

pub fn create_generation_tasks() -> GenerationTasks {
    Arc::new(Mutex::new(std::collections::HashMap::new()))
}

/// Create and initialize the classroom persistence layer, loading saved data.
pub async fn init_persistence(
    app_handle: &tauri::AppHandle,
    store: &ClassroomStore,
    chat_store: &ChatStore,
) -> Result<ClassroomPersistence, String> {
    let app_dir = app_handle
        .path()
        .app_data_dir()
        .map_err(|e| format!("Failed to get app data dir: {}", e))?;

    let db_path = app_dir.join("classroom").join("classrooms.db");
    std::fs::create_dir_all(db_path.parent().unwrap())
        .map_err(|e| format!("Failed to create classroom dir: {}", e))?;

    let persistence: ClassroomPersistence = ClassroomPersistence::open(db_path).await?;
    let loaded = persistence.load_all(store, chat_store).await?;
    tracing::info!("[ClassroomPersistence] Loaded {} classrooms from SQLite", loaded);
    Ok(persistence)
}