"""Device API routes."""

import json
import time
from flask import Blueprint, jsonify, Response


def create_devices_blueprint(server_config):
    """
    Create the devices API blueprint.

    Args:
        server_config: Dict with keys:
            - get_device_registry: Callable returning device registry
            - require_api_auth: Auth decorator
    """
    bp = Blueprint("api_devices", __name__, url_prefix="/api")

    get_registry = server_config["get_device_registry"]
    require_api_auth = server_config["require_api_auth"]

    def _serialize_devices():
        registry = get_registry()
        if registry is None:
            return {"devices": [], "count": 0}
        now = time.time()
        devices = []
        for d in registry.all():
            devices.append({
                "id": d.id,
                "ip": d.address[0] if d.address else "unknown",
                "port": d.address[1] if d.address else 0,
                "status": d.status,
                "chip": d.chip,
                "modules": d.modules,
                "connected_at": d.connected_at,
                "last_seen": d.last_seen,
                "connected_for_seconds": round(now - d.connected_at, 1),
                "last_seen_ago_seconds": round(now - d.last_seen, 1)
            })
        return {"devices": devices, "count": len(devices)}

    @bp.route("/devices")
    @require_api_auth
    def list_devices():
        return jsonify(_serialize_devices())

    @bp.route("/devices/stream")
    @require_api_auth
    def stream_devices():
        def generate():
            while True:
                data = _serialize_devices()
                yield f"data: {json.dumps(data)}\n\n"
                time.sleep(3)
        return Response(generate(), mimetype="text/event-stream",
                        headers={"Cache-Control": "no-cache", "X-Accel-Buffering": "no"})

    return bp