"""
LogiFlow AI - Autonomous Logistics Agent System
=================================================

Usage:
    python main.py --production             # Start all agents (production mode)
    python main.py --dashboard              # Launch admin dashboard
    python main.py --portal                 # Launch customer portal
    python main.py --help                   # Show this help
"""

import asyncio
import sys
import signal
from datetime import datetime
from typing import Dict, Any

# Force UTF-8 on Windows so emoji in output doesn't crash
if hasattr(sys.stdout, "reconfigure"):
    sys.stdout.reconfigure(encoding="utf-8", errors="replace")
if hasattr(sys.stderr, "reconfigure"):
    sys.stderr.reconfigure(encoding="utf-8", errors="replace")

from dotenv import load_dotenv
load_dotenv()  # must happen before any config import reads os.getenv()

from core.logger import logger
from core.agent import MasterAgent, Agent
from core.message_bus import message_bus
from core.http_client import close_session
from core.types import AgentTask, MessageType, Priority

from agents.order_agent import OrderAgent
from agents.dispatch_agent import DispatchAgent
from agents.fleet_agent import FleetAgent
from agents.hub_agent import HubAgent
from agents.customer_agent import CustomerAgent
from agents.exception_agent import ExceptionAgent
from agents.route_optimizer_agent import RouteOptimizerAgent


class LogiFlowAI:
    """Main orchestration class — manages all agents and system lifecycle."""

    def __init__(self):
        logger.info("=" * 60)
        logger.info("LOGIFLOW AI - AUTONOMOUS LOGISTICS SYSTEM")
        logger.info("=" * 60)

        self.master_agent = MasterAgent()
        self.agents: Dict[str, Agent] = {}
        self.running = False

    def initialize_agents(self):
        logger.info("Initializing AI Agents...")

        self.agents["ORDER_AGENT"]    = OrderAgent()
        self.agents["DISPATCH_AGENT"] = DispatchAgent()
        self.agents["FLEET_AGENT"]    = FleetAgent()
        self.agents["HUB_AGENT"]      = HubAgent()
        self.agents["CUSTOMER_AGENT"] = CustomerAgent()
        self.agents["EXCEPTION_AGENT"] = ExceptionAgent()
        self.agents["ROUTE_OPTIMIZER"] = RouteOptimizerAgent()

        for agent in self.agents.values():
            self.master_agent.register_sub_agent(agent)

        logger.info(f"{len(self.agents) + 1} agents initialized (JARVIS + {len(self.agents)} specialized)")

    async def start_agents(self):
        logger.info("Starting Agent System...")
        self.running = True

        tasks = [asyncio.create_task(self.master_agent.start())]
        tasks += [asyncio.create_task(a.start()) for a in self.agents.values()]

        logger.info("All agents running — waiting for work")

        try:
            await asyncio.gather(*tasks, return_exceptions=True)
        except asyncio.CancelledError:
            pass
        finally:
            self.running = False

    async def stop(self):
        self.running = False
        await self.master_agent.stop()
        for agent in self.agents.values():
            await agent.stop()

    def get_system_status(self) -> Dict[str, Any]:
        status = {
            "timestamp": datetime.now().isoformat(),
            "system": "operational" if self.running else "stopped",
            "agents": {},
        }
        for agent_id, agent in self.agents.items():
            status["agents"][agent_id] = {
                "status": agent.state.status,
                "tasks_completed": agent.state.tasks_completed,
                "current_task": agent.state.current_task,
            }
        status["agents"]["JARVIS"] = {
            "status": self.master_agent.state.status,
            "sub_agents": len(self.agents),
        }
        return status


# ------------------------------------------------------------------ #
#  Run modes                                                            #
# ------------------------------------------------------------------ #

async def production_mode():
    logger.info("PRODUCTION MODE — connecting to infrastructure")

    try:
        await message_bus.connect()
    except Exception as e:
        logger.warning(f"Could not connect to NATS: {e} — using local in-process fallback")

    system = LogiFlowAI()
    system.initialize_agents()

    logger.info("Infrastructure connected. Press Ctrl+C to stop.")

    loop = asyncio.get_running_loop()

    def _shutdown(signum, frame):
        logger.info("Shutdown signal received — stopping agents...")
        loop.create_task(_graceful_shutdown(system))

    signal.signal(signal.SIGINT,  _shutdown)
    signal.signal(signal.SIGTERM, _shutdown)

    try:
        await system.start_agents()
    finally:
        await message_bus.disconnect()
        await close_session()
        logger.info("Clean shutdown complete")


async def _graceful_shutdown(system: LogiFlowAI):
    await system.stop()
    tasks = [t for t in asyncio.all_tasks() if t is not asyncio.current_task()]
    for t in tasks:
        t.cancel()


async def dashboard_mode():
    import subprocess
    logger.info("Launching Admin Dashboard at http://localhost:8501")
    subprocess.run(["streamlit", "run", "dashboard/admin_dashboard.py"])


async def portal_mode():
    import subprocess
    logger.info("Launching Customer Portal at http://localhost:8502")
    subprocess.run(["streamlit", "run", "customer_portal/portal.py", "--server.port", "8502"])


# ------------------------------------------------------------------ #
#  Entry point                                                          #
# ------------------------------------------------------------------ #

def main():
    if len(sys.argv) < 2 or sys.argv[1] == "--help":
        print_help()
        return

    cmd = sys.argv[1]
    if cmd == "--production":
        asyncio.run(production_mode())
    elif cmd == "--dashboard":
        asyncio.run(dashboard_mode())
    elif cmd == "--portal":
        asyncio.run(portal_mode())
    else:
        logger.error(f"Unknown argument: {cmd}")
        print_help()
        sys.exit(1)


def print_help():
    print("""
LogiFlow AI - Autonomous Logistics Agent System
===============================================

Usage:
    python main.py --production     Connect to NATS/Redis/Postgres and run forever
    python main.py --dashboard      Launch Streamlit admin dashboard
    python main.py --portal         Launch Streamlit customer portal
    python main.py --help           Show this help

Infrastructure (set in .env):
    NATS   nats://doormile@66.116.226.161:4223
    Redis  66.116.226.255:6380
    PG     DB_HOST / DB_PORT / DB_NAME / DB_USER / DB_PASSWORD
    API    GO_API_BASE_URL
    """)


if __name__ == "__main__":
    main()