#!/usr/bin/env python3
"""
start.py – Gunicorn Process Manager for SexyChat.

Usage:
    python start.py start      # Starts SexyChat in the background
    python start.py stop       # Stops the background process
    python start.py restart    # Restarts the background process
    python start.py status     # Shows if the server is running
    python start.py debug      # Runs in the foreground with debug logging
"""

import os
import sys
import subprocess
import signal
import time
import eventlet

# Monkey-patch stdlib BEFORE any other import
eventlet.monkey_patch()

from config import get_conf

# PID file to track the daemon process
PID_FILE = "sexchat.pid"

def get_pid():
    if os.path.exists(PID_FILE):
        with open(PID_FILE, "r") as f:
            try:
                return int(f.read().strip())
            except ValueError:
                return None
    return None

def is_running(pid):
    if not pid:
        return False
    try:
        os.kill(pid, 0)
    except OSError:
        return False
    return True

def start_daemon():
    pid = get_pid()
    if is_running(pid):
        print(f"❌ SexChat is already running (PID: {pid}).")
        return

    print("🚀 Starting SexChat in background...")
    cmd = [
        "gunicorn",
        "--worker-class", "eventlet",
        "-w", "1",
        "--bind", f"{get_conf('HOST', '0.0.0.0')}:{get_conf('PORT', 5000)}",
        "--daemon",
        "--pid", PID_FILE,
        "--access-logfile", "access.log",
        "--error-logfile", "error.log",
        "start:application"
    ]
    subprocess.run(cmd)
    time.sleep(1)
    
    new_pid = get_pid()
    if is_running(new_pid):
        print(f"✅ SexChat started successfully (PID: {new_pid}).")
    else:
        print("❌ Failed to start SexChat. Check error.log for details.")

def stop_daemon():
    pid = get_pid()
    if not is_running(pid):
        print("ℹ️ SexChat is not running.")
        if os.path.exists(PID_FILE):
            os.remove(PID_FILE)
        return

    print(f"🛑 Stopping SexChat (PID: {pid})...")
    try:
        os.kill(pid, signal.SIGTERM)
        # Wait for it to die
        for _ in range(10):
            if not is_running(pid):
                break
            time.sleep(0.5)
        
        if is_running(pid):
            print("⚠️ Force killing...")
            os.kill(pid, signal.SIGKILL)
            
        if os.path.exists(PID_FILE):
            os.remove(PID_FILE)
        print("✅ SexChat stopped.")
    except Exception as e:
        print(f"❌ Error stopping: {e}")

def get_status():
    pid = get_pid()
    if is_running(pid):
        print(f"🟢 SexChat is RUNNING (PID: {pid}).")
    else:
        print("🔴 SexChat is STOPPED.")

def run_debug():
    print("🛠️ Starting SexChat in DEBUG mode (foreground)...")
    cmd = [
        "gunicorn",
        "--worker-class", "eventlet",
        "-w", "1",
        "--bind", f"{get_conf('HOST', '0.0.0.0')}:{get_conf('PORT', 5000)}",
        "--log-level", "debug",
        "--access-logfile", "-",
        "--error-logfile", "-",
        "start:application"
    ]
    try:
        subprocess.run(cmd)
    except KeyboardInterrupt:
        print("\n👋 Debug session ended.")

# This is the Flask Application instance for Gunicorn
from app import create_app
application = create_app()

if __name__ == "__main__":
    if len(sys.argv) < 2:
        print(__doc__)
        sys.exit(1)

    command = sys.argv[1].lower()

    if command == "start":
        start_daemon()
    elif command == "stop":
        stop_daemon()
    elif command == "restart":
        stop_daemon()
        time.sleep(1)
        start_daemon()
    elif command == "status":
        get_status()
    elif command == "debug":
        run_debug()
    else:
        print(f"❌ Unknown command: {command}")
        print(__doc__)
        sys.exit(1)