//! WASM-JS bridge for game communication
//!
//! This module provides JavaScript bindings to expose game data and events
//! from the Bevy/WASM game to the React frontend.

use std::sync::{Arc, Mutex};
use wasm_bindgen::prelude::{JsValue, wasm_bindgen};

use borders_core::ui::protocol::{CameraStateUpdate, RenderInputEvent};

// Global state for input handling (needs to be accessible from Bevy systems)
lazy_static::lazy_static! {
    static ref INPUT_STATE: Arc<Mutex<borders_core::ui::input::InputState>> =
        Arc::new(Mutex::new(borders_core::ui::input::InputState::new()));
    static ref CAMERA_STATE: Arc<Mutex<Option<CameraStateUpdate>>> =
        Arc::new(Mutex::new(None));
}

/// Handle render input events from the frontend (clicks, keys, hover)
#[wasm_bindgen]
pub fn handle_render_input(event: JsValue) -> Result<(), JsValue> {
    let event: RenderInputEvent = serde_wasm_bindgen::from_value(event).map_err(|e| JsValue::from_str(&format!("Failed to deserialize render input: {}", e)))?;

    let mut state = INPUT_STATE.lock().map_err(|e| JsValue::from_str(&format!("Failed to lock input state: {}", e)))?;

    // TODO: Get actual map width from GameView or TerrainData
    let map_width = 2560; // Placeholder

    borders_core::ui::handle_render_input(&event, &mut state, map_width).map_err(|e| JsValue::from_str(&e))
}

/// Handle camera state updates from the frontend
#[wasm_bindgen]
pub fn handle_camera_update(state: JsValue) -> Result<(), JsValue> {
    let update: CameraStateUpdate = serde_wasm_bindgen::from_value(state).map_err(|e| JsValue::from_str(&format!("Failed to deserialize camera state: {}", e)))?;

    let mut camera_state = CAMERA_STATE.lock().map_err(|e| JsValue::from_str(&format!("Failed to lock camera state: {}", e)))?;

    borders_core::ui::handle_camera_update(update, &mut camera_state).map_err(|e| JsValue::from_str(&e))
}

/// Get the global input state (for Bevy systems to access)
pub fn get_input_state() -> Arc<Mutex<borders_core::ui::input::InputState>> {
    INPUT_STATE.clone()
}

/// Track an analytics event
#[wasm_bindgen]
pub fn track_analytics_event(event: JsValue) -> Result<(), JsValue> {
    #[derive(serde::Deserialize)]
    struct AnalyticsEventPayload {
        event: String,
        #[serde(default)]
        properties: std::collections::HashMap<String, serde_json::Value>,
    }

    let payload: AnalyticsEventPayload = serde_wasm_bindgen::from_value(event).map_err(|e| JsValue::from_str(&format!("Failed to deserialize analytics event: {}", e)))?;

    let telemetry_event = borders_core::telemetry::TelemetryEvent { event: payload.event, properties: payload.properties };

    // Spawn a task to track the event asynchronously
    wasm_bindgen_futures::spawn_local(async move {
        borders_core::telemetry::track(telemetry_event).await;
    });

    Ok(())
}