from flask import jsonify, request
from werkzeug.wrappers import Response

import document_engine
from core.flask_app import app


@app.route("/document/<slug>/pages/<int:page_id>/move", methods=["POST"])
def document_page_move(slug: str, page_id: int) -> Response | tuple[Response, int]:
    """Réordonne une page dans la bande d'onglets — new_index calculé
    côté client (glisser-déposer d'un onglet, voir static/document/js/
    document-editor.js)."""
    if document_engine.get_document_page(slug, page_id) is None:
        return jsonify({"error": "page introuvable"}), 404
    payload = request.get_json(force=True) or {}
    new_index = int(payload.get("new_index", 0))
    document_engine.move_document_page(slug, page_id, new_index)
    return jsonify({"ok": True})