#!/usr/bin/env python3
"""
Telegram Callback Query Handler
监听inline keyboard按钮点击，执行交易确认/取消
"""

import os
import re
import sys
import json
import time
import requests
import subprocess

def _load_env():
    env_path = os.path.expanduser("~/.hermes/.env")
    with open(env_path) as f:
        for line in f:
            m = re.match(r'TELEGRAM_BOT_TOKEN=(.*)', line.strip())
            if m:
                return m.group(1).strip()
    return ''

BOT_TOKEN = _load_env()
PROXY = 'http://127.0.0.1:7890'
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
NOTIFIER = os.path.join(SCRIPT_DIR, "trade_notifier.py")
LAST_UPDATE_FILE = os.path.expanduser("~/.hermes/trading/last_update_id")

os.makedirs(os.path.dirname(LAST_UPDATE_FILE), exist_ok=True)


def get_updates(offset=None, timeout=30):
    """Long-poll for updates"""
    url = f"https://api.telegram.org/bot{BOT_TOKEN}/getUpdates"
    params = {"timeout": timeout, "allowed_updates": '["callback_query"]'}
    if offset:
        params["offset"] = offset
    resp = requests.get(url, params=params, proxies={"https": PROXY, "http": PROXY}, timeout=timeout+10)
    return resp.json()


def load_last_update_id():
    """Load last processed update ID"""
    try:
        with open(LAST_UPDATE_FILE) as f:
            return int(f.read().strip())
    except:
        return None


def save_last_update_id(update_id):
    """Save last processed update ID"""
    with open(LAST_UPDATE_FILE, "w") as f:
        f.write(str(update_id))


def handle_callback_query(update):
    """Process a callback query"""
    cb = update.get("callback_query", {})
    if not cb:
        return
    
    callback_data = cb.get("data", "")
    callback_query_id = cb.get("id", "")
    message = cb.get("message", {})
    chat_id = str(message.get("chat", {}).get("id", ""))
    message_id = message.get("message_id", 0)
    
    print(f"[{time.strftime('%H:%M:%S')}] Callback: {callback_data} from chat {chat_id}")
    
    # Call trade_notifier.py callback handler
    result = subprocess.run(
        ["python3", NOTIFIER, "callback", callback_data, str(chat_id), str(message_id), callback_query_id],
        capture_output=True, text=True, timeout=60
    )
    
    if result.returncode != 0:
        print(f"  Error: {result.stderr[:200]}")
    else:
        print(f"  Result: {result.stdout[:200]}")


def main():
    print("🔄 Callback handler started, waiting for button clicks...")
    
    last_id = load_last_update_id()
    
    while True:
        try:
            result = get_updates(offset=(last_id + 1) if last_id else None, timeout=30)
            
            if not result.get("ok"):
                print(f"API error: {result}")
                time.sleep(5)
                continue
            
            updates = result.get("result", [])
            for update in updates:
                update_id = update.get("update_id", 0)
                if update.get("callback_query"):
                    handle_callback_query(update)
                last_id = update_id
                save_last_update_id(last_id)
            
        except requests.exceptions.Timeout:
            continue
        except KeyboardInterrupt:
            print("\n🛑 Stopped")
            break
        except Exception as e:
            print(f"Error: {e}")
            time.sleep(5)


if __name__ == "__main__":
    main()