"""
AI chat API routes (optional).
Currently kept as a minimal compatibility layer for legacy frontend calls.
"""

from flask import Blueprint, jsonify, request

from app.utils.logger import get_logger

logger = get_logger(__name__)

ai_chat_bp = Blueprint("ai_chat", __name__)


@ai_chat_bp.route("/chat/message", methods=["POST"])
def chat_message():
    """
    Minimal placeholder for legacy chat.
    Return a friendly message instead of 404, so the UI can evolve gradually.
    """
    data = request.get_json() or {}
    msg = (data.get("message") or "").strip()
    if not msg:
        return jsonify({"code": 0, "msg": "Missing message", "data": None}), 400
    return jsonify(
        {
            "code": 1,
            "msg": "success",
            "data": {"reply": "Chat API is not implemented yet in local-only mode.", "echo": msg},
        }
    )


@ai_chat_bp.route("/chat/history", methods=["GET"])
def get_chat_history():
    """Return empty history (compatibility stub)."""
    return jsonify({"code": 1, "msg": "success", "data": []})


@ai_chat_bp.route("/chat/history/save", methods=["POST"])
def save_chat_history():
    """No-op save (compatibility stub)."""
    return jsonify({"code": 1, "msg": "success", "data": None})