"""
RCON tool for Minecraft server interaction.

Provides:
  - rcon_execute(command) -> send RCON command, return result
  - get_server_status() -> player list, time, difficulty
  - get_player_info(player) -> position, health, gamemode
"""

import re
import socket
import struct
import time
from typing import Dict, Any, Optional, List


def rcon_send(cmd: str, host: str = '127.0.0.1', port: int = 25577,
              password: str = 'REDACTED_RCON', timeout: float = 5.0) -> str:
    """Send a single RCON command and return the response text."""
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(timeout)
    try:
        s.connect((host, int(port)))

        def pkt(req_id: int, pkt_type: int, payload: str) -> bytes:
            p = payload.encode('utf-8') + b'\x00\x00'
            return struct.pack('<iii', len(p) + 8, req_id, pkt_type) + p

        # Authenticate (type 3)
        s.sendall(pkt(1, 3, password))
        time.sleep(0.15)
        s.recv(4096)
        # Send command (type 2)
        s.sendall(pkt(2, 2, cmd))
        time.sleep(0.2)
        r = s.recv(4096)
        return r[12:-2].decode('utf-8', errors='replace')
    except Exception as e:
        return f'RCON error: {e}'
    finally:
        s.close()


class RconTool:
    """RCON tool with configurable connection parameters."""

    def __init__(self, host: str = '127.0.0.1', port: int = 25577,
                 password: str = 'REDACTED_RCON'):
        self.host = host
        self.port = port
        self.password = password

    def execute(self, command: str) -> Dict[str, Any]:
        """Execute an RCON command and return structured result."""
        result = rcon_send(command, self.host, self.port, self.password)
        is_error = any(w in result.lower() for w in [
            'unknown', 'incorrect argument', 'expected', 'syntax error',
            'error', 'unparseable', 'invalid',
        ])
        return {
            'command': command,
            'result': result.strip(),
            'success': not is_error,
        }

    def get_server_status(self) -> Dict[str, Any]:
        """Get server state: players, time, difficulty."""
        players_raw = rcon_send('list', self.host, self.port, self.password)
        time_raw = rcon_send('time query daytime', self.host, self.port, self.password)
        diff_raw = rcon_send('difficulty', self.host, self.port, self.password)

        players = []
        m = re.search(r'online:\s*(.*)', players_raw)
        if m and m.group(1).strip():
            players = [p.strip() for p in m.group(1).split(',') if p.strip()]

        time_m = re.search(r'(\d+)', time_raw)
        ticks = int(time_m.group(1)) if time_m else 0

        diff_m = re.search(r'difficulty is (\w+)', diff_raw)
        difficulty = diff_m.group(1) if diff_m else 'unknown'

        return {
            'players_online': players,
            'player_count': len(players),
            'time_ticks': ticks,
            'difficulty': difficulty,
        }

    def get_player_info(self, player: str) -> Dict[str, Any]:
        """Get player position, health, gamemode."""
        pos_raw = rcon_send(f'data get entity {player} Pos', self.host, self.port, self.password)
        health_raw = rcon_send(f'data get entity {player} Health', self.host, self.port, self.password)
        gm_raw = rcon_send(f'data get entity {player} playerGameType', self.host, self.port, self.password)

        pos = None
        pos_m = re.findall(r'(-?[\d.]+)d', pos_raw)
        if pos_m and len(pos_m) >= 3:
            pos = {'x': float(pos_m[0]), 'y': float(pos_m[1]), 'z': float(pos_m[2])}

        health_m = re.search(r'([\d.]+)f', health_raw)
        health = float(health_m.group(1)) if health_m else None

        gm_m = re.search(r'data:\s*(\d+)', gm_raw)
        gm_map = {0: 'survival', 1: 'creative', 2: 'adventure', 3: 'spectator'}
        gamemode = gm_map.get(int(gm_m.group(1)), 'unknown') if gm_m else None

        return {
            'player': player,
            'position': pos,
            'health': health,
            'gamemode': gamemode,
            'online': pos is not None,
        }