from flask import Flask, request, jsonify
from flask_cors import CORS
import json
import os
import re
from datetime import datetime  # ✅ minimal timestamp support

app = Flask(__name__)
CORS(app)

def sanitize_filename(name):
    """Remove unsafe characters from filename."""
    safe = re.sub(r'[\/:*?"<>|]', '', name)
    return safe[:50] if len(safe) > 50 else safe

def save_payload_as_player_file(payload):
    """Save payload to a file named after the player, overwriting if exists."""
    try:
        player_name = payload.get("player", "default_player")
        filename = sanitize_filename(player_name) + ".json"

        with open(filename, "w", encoding="utf-8") as f:
            json.dump(payload, f, ensure_ascii=False, indent=2)

        print(f"📝 Payload saved to {filename}")
    except Exception as e:
        print("❌ Failed to save payload:", e)

@app.route('/api/grepolis-data', methods=['POST'])
def receive_data():
    print("\n📬 New request to /api/grepolis-data")

    try:
        payload = request.get_json(force=True)
        print("✅ Parsed JSON:", payload)

        # Inject server-side timestamp (system time)
        payload["server_received_at"] = datetime.now().isoformat()

        save_payload_as_player_file(payload)

        return jsonify({
            "status": "success",
            "message": "Grepolis data received and saved",
            "server_received_at": payload["server_received_at"]
        }), 200

    except Exception as e:
        print("❌ JSON parse error:", e)
        return jsonify({
            "status": "error",
            "message": f"Invalid JSON: {str(e)}"
        }), 400

@app.errorhandler(Exception)
def handle_error(e):
    print("💥 Unhandled server error:", e)
    return jsonify({"error": str(e)}), 500

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)