"""
BMC Hub - FastAPI Application
Main application entry point
"""

import logging
from pathlib import Path
from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.responses import RedirectResponse
from contextlib import asynccontextmanager

from app.core.config import settings
from app.core.database import init_db
from app.core.auth_service import AuthService
from app.core.database import execute_query_single

def get_version():
    """Read version from VERSION file"""
    try:
        version_file = Path(__file__).parent / "VERSION"
        return version_file.read_text().strip()
    except Exception:
        return "unknown"

# Import Feature Routers
from app.customers.backend import router as customers_api
from app.customers.backend import views as customers_views
from app.customers.backend import bmc_office_router
# from app.hardware.backend import router as hardware_api  # Replaced by hardware module
from app.billing.backend import router as billing_api
from app.billing.frontend import views as billing_views
from app.system.backend import router as system_api
from app.system.backend import sync_router
from app.dashboard.backend import views as dashboard_views
from app.dashboard.backend import router as dashboard_api
from app.prepaid.backend import router as prepaid_api
from app.prepaid.backend import views as prepaid_views
from app.fixed_price.backend import router as fixed_price_api
from app.fixed_price.frontend import views as fixed_price_views
from app.subscriptions.backend import router as subscriptions_api
from app.subscriptions.frontend import views as subscriptions_views
from app.products.backend import router as products_api
from app.products.frontend import views as products_views
from app.ticket.backend import router as ticket_api
from app.ticket.frontend import views as ticket_views
from app.vendors.backend import router as vendors_api
from app.vendors.backend import views as vendors_views
from app.timetracking.backend import router as timetracking_api
from app.timetracking.frontend import views as timetracking_views
from app.contacts.backend import views as contacts_views
from app.contacts.backend import router_simple as contacts_api
from app.tags.backend import router as tags_api
from app.tags.backend import views as tags_views
from app.emails.backend import router as emails_api
from app.emails.frontend import views as emails_views
from app.settings.backend import router as settings_api
from app.settings.backend import email_templates as email_templates_api
from app.settings.backend import views as settings_views
from app.backups.backend.router import router as backups_api
from app.backups.frontend import views as backups_views
from app.backups.backend.scheduler import backup_scheduler
from app.conversations.backend import router as conversations_api
from app.conversations.frontend import views as conversations_views
from app.opportunities.backend import router as opportunities_api
from app.opportunities.frontend import views as opportunities_views
from app.auth.backend import router as auth_api
from app.auth.backend import views as auth_views
from app.auth.backend import admin as auth_admin_api
from app.devportal.backend import router as devportal_api
from app.devportal.backend import views as devportal_views
from app.routers import anydesk

# Modules
from app.modules.webshop.backend import router as webshop_api
from app.modules.webshop.frontend import views as webshop_views
from app.modules.sag.backend import router as sag_api
from app.modules.sag.backend import reminders as sag_reminders_api
from app.modules.sag.frontend import views as sag_views
from app.modules.hardware.backend import router as hardware_module_api
from app.modules.hardware.frontend import views as hardware_module_views
from app.modules.locations.backend import router as locations_api
from app.modules.locations.frontend import views as locations_views
from app.modules.nextcloud.backend import router as nextcloud_api
from app.modules.search.backend import router as search_api
from app.modules.wiki.backend import router as wiki_api
from app.fixed_price.backend import router as fixed_price_api
from app.modules.telefoni.backend import router as telefoni_api
from app.modules.telefoni.frontend import views as telefoni_views
from app.modules.calendar.backend import router as calendar_api
from app.modules.calendar.frontend import views as calendar_views
from app.modules.orders.backend import router as orders_api
from app.modules.orders.frontend import views as orders_views

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    handlers=[
        logging.StreamHandler(),
        logging.FileHandler('logs/app.log')
    ]
)

logger = logging.getLogger(__name__)

@asynccontextmanager
async def lifespan(app: FastAPI):
    """Lifecycle management - startup and shutdown"""
    # Startup
    logger.info("🚀 Starting BMC Hub...")
    logger.info(f"Database: {settings.DATABASE_URL}")
    
    init_db()
    
    # Start unified scheduler (handles backups + email fetch + reminders)
    backup_scheduler.start()
    
    # Register reminder scheduler job
    from app.jobs.check_reminders import check_reminders
    from apscheduler.triggers.interval import IntervalTrigger
    from apscheduler.triggers.cron import CronTrigger
    
    backup_scheduler.scheduler.add_job(
        func=check_reminders,
        trigger=IntervalTrigger(minutes=5),
        id='check_reminders',
        name='Check Reminders',
        max_instances=1,
        replace_existing=True
    )
    logger.info("✅ Reminder job scheduled (every 5 minutes)")

    # Register subscription invoice processing job
    from app.jobs.process_subscriptions import process_subscriptions
    
    backup_scheduler.scheduler.add_job(
        func=process_subscriptions,
        trigger=CronTrigger(hour=4, minute=0),
        id='process_subscriptions',
        name='Process Subscription Invoices',
        max_instances=1,
        replace_existing=True
    )
    logger.info("✅ Subscription invoice job scheduled (daily at 04:00)")

    if settings.ESET_ENABLED and settings.ESET_SYNC_ENABLED:
        from app.jobs.eset_sync import run_eset_sync

        backup_scheduler.scheduler.add_job(
            func=run_eset_sync,
            trigger=IntervalTrigger(minutes=settings.ESET_SYNC_INTERVAL_MINUTES),
            id='eset_sync',
            name='ESET Sync',
            max_instances=1,
            replace_existing=True
        )
        logger.info("✅ ESET sync job scheduled (every %d minutes)", settings.ESET_SYNC_INTERVAL_MINUTES)
    
    logger.info("✅ System initialized successfully")
    yield
    # Shutdown
    backup_scheduler.stop()
    logger.info("👋 Shutting down...")

# Create FastAPI app
app = FastAPI(
    title="BMC Hub API",
    description="""
    Central management system for BMC Networks.
    
    **Key Features:**
    - Customer management
    - Hardware tracking
    - Service management
    - Billing integration
    """,
    version="1.0.0",
    lifespan=lifespan,
    docs_url="/api/docs",
    redoc_url="/api/redoc",
    openapi_url="/api/openapi.json"
)

# CORS middleware - use CORS_ORIGINS if set, otherwise fallback to ALLOWED_ORIGINS
cors_origins = settings.CORS_ORIGINS.split(",") if settings.CORS_ORIGINS else settings.ALLOWED_ORIGINS
app.add_middleware(
    CORSMiddleware,
    allow_origins=cors_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Global auth middleware
@app.middleware("http")
async def auth_middleware(request: Request, call_next):
    path = request.url.path

    public_paths = {
        "/health",
        "/login",
        "/api/v1/auth/login"
    }

    # Yealink Action URL callbacks (secured inside telefoni module by token/IP)
    public_paths.add("/api/v1/telefoni/established")
    public_paths.add("/api/v1/telefoni/terminated")

    if settings.DEV_ALLOW_ARCHIVED_IMPORT:
        public_paths.add("/api/v1/ticket/archived/simply/import")
        public_paths.add("/api/v1/ticket/archived/simply/modules")
        public_paths.add("/api/v1/ticket/archived/simply/ticket")
        public_paths.add("/api/v1/ticket/archived/simply/record")

    if path in public_paths or path.startswith("/static") or path.startswith("/docs"):
        return await call_next(request)

    token = None
    auth_header = request.headers.get("Authorization")
    if auth_header and auth_header.lower().startswith("bearer "):
        token = auth_header.split(" ", 1)[1]
    else:
        token = request.cookies.get("access_token")

    payload = AuthService.verify_token(token) if token else None
    if not payload:
        if path.startswith("/api"):
            from fastapi.responses import JSONResponse
            return JSONResponse(
                status_code=401,
                content={"detail": "Not authenticated"}
            )
        return RedirectResponse(url="/login")

    user_id_value = payload.get("sub") or payload.get("user_id")
    if user_id_value is not None:
        try:
            request.state.user_id = int(user_id_value)
        except (TypeError, ValueError):
            request.state.user_id = None

    if path.startswith("/api") and not payload.get("shadow_admin"):
        if not payload.get("sub"):
            from fastapi.responses import JSONResponse
            return JSONResponse(
                status_code=401,
                content={"detail": "Invalid token"}
            )
        user_id = int(payload.get("sub"))
        user = execute_query_single(
            "SELECT is_2fa_enabled FROM users WHERE user_id = %s",
            (user_id,)
        )
        is_2fa_enabled = bool(user and user.get("is_2fa_enabled"))

        if not is_2fa_enabled:
            allowed_2fa_paths = (
                "/api/v1/auth/2fa",
                "/api/v1/auth/me",
                "/api/v1/auth/logout"
            )
            if not path.startswith(allowed_2fa_paths):
                from fastapi.responses import JSONResponse
                return JSONResponse(
                    status_code=403,
                    content={"detail": "2FA required"}
                )

    return await call_next(request)

# Include routers
app.include_router(customers_api.router, prefix="/api/v1", tags=["Customers"])
app.include_router(bmc_office_router.router, prefix="/api/v1", tags=["BMC Office"])
# app.include_router(hardware_api.router, prefix="/api/v1", tags=["Hardware"])  # Replaced by hardware module
app.include_router(billing_api.router, prefix="/api/v1", tags=["Billing"])
app.include_router(system_api.router, prefix="/api/v1", tags=["System"])
app.include_router(dashboard_api.router, prefix="/api/v1", tags=["Dashboard"])
app.include_router(sync_router.router, prefix="/api/v1/system", tags=["System Sync"])
app.include_router(prepaid_api.router, prefix="/api/v1", tags=["Prepaid Cards"])
app.include_router(fixed_price_api.router, prefix="/api/v1", tags=["Fixed-Price Agreements"])
app.include_router(subscriptions_api.router, prefix="/api/v1", tags=["Subscriptions"])
app.include_router(products_api.router, prefix="/api/v1", tags=["Products"])
app.include_router(ticket_api.router, prefix="/api/v1/ticket", tags=["Tickets"])
app.include_router(vendors_api.router, prefix="/api/v1", tags=["Vendors"])
app.include_router(contacts_api.router, prefix="/api/v1", tags=["Contacts"])
app.include_router(timetracking_api, prefix="/api/v1", tags=["Time Tracking"])
app.include_router(tags_api.router, prefix="/api/v1", tags=["Tags"])
app.include_router(emails_api.router, prefix="/api/v1", tags=["Emails"])
app.include_router(settings_api.router, prefix="/api/v1", tags=["Settings"])
app.include_router(email_templates_api.router, prefix="/api/v1", tags=["Email Templates"])
app.include_router(backups_api, prefix="/api/v1", tags=["Backups"])
app.include_router(conversations_api.router, prefix="/api/v1", tags=["Conversations"])
app.include_router(opportunities_api.router, prefix="/api/v1", tags=["Opportunities"])
app.include_router(auth_api.router, prefix="/api/v1/auth", tags=["Auth"])
app.include_router(auth_admin_api.router, prefix="/api/v1", tags=["Auth Admin"])
app.include_router(anydesk.router, prefix="/api/v1", tags=["Remote Support"])

# Module Routers
app.include_router(webshop_api.router, prefix="/api/v1", tags=["Webshop"])
app.include_router(sag_api.router, prefix="/api/v1", tags=["Cases"])
app.include_router(sag_reminders_api.router, tags=["Reminders"])  # No prefix - endpoints have full path
app.include_router(hardware_module_api.router, prefix="/api/v1", tags=["Hardware Module"])
app.include_router(locations_api, prefix="/api/v1", tags=["Locations"])
app.include_router(nextcloud_api.router, prefix="/api/v1/nextcloud", tags=["Nextcloud"])
app.include_router(search_api.router, prefix="/api/v1", tags=["Search"])
app.include_router(wiki_api.router, prefix="/api/v1/wiki", tags=["Wiki"])
app.include_router(devportal_api.router, prefix="/api/v1/devportal", tags=["Devportal"])
app.include_router(telefoni_api.router, prefix="/api/v1", tags=["Telefoni"])
app.include_router(calendar_api.router, prefix="/api/v1", tags=["Calendar"])
app.include_router(orders_api.router, prefix="/api/v1", tags=["Orders"])

# Frontend Routers
app.include_router(dashboard_views.router, tags=["Frontend"])
app.include_router(customers_views.router, tags=["Frontend"])
app.include_router(prepaid_views.router, tags=["Frontend"])
app.include_router(fixed_price_views.router, tags=["Frontend"])
app.include_router(subscriptions_views.router, tags=["Frontend"])
app.include_router(products_views.router, tags=["Frontend"])
app.include_router(vendors_views.router, tags=["Frontend"])
app.include_router(timetracking_views.router, tags=["Frontend"])
app.include_router(billing_views.router, tags=["Frontend"])
app.include_router(ticket_views.router, prefix="/ticket", tags=["Frontend"])
app.include_router(contacts_views.router, tags=["Frontend"])
app.include_router(tags_views.router, tags=["Frontend"])
app.include_router(settings_views.router, tags=["Frontend"])
app.include_router(emails_views.router, tags=["Frontend"])
app.include_router(backups_views.router, tags=["Frontend"])
app.include_router(conversations_views.router, tags=["Frontend"])
app.include_router(webshop_views.router, tags=["Frontend"])
app.include_router(opportunities_views.router, tags=["Frontend"])
app.include_router(auth_views.router, tags=["Frontend"])
app.include_router(sag_views.router, tags=["Frontend"])
app.include_router(hardware_module_views.router, tags=["Frontend"])
app.include_router(locations_views.router, tags=["Frontend"])
app.include_router(devportal_views.router, tags=["Frontend"])
app.include_router(telefoni_views.router, tags=["Frontend"])
app.include_router(calendar_views.router, tags=["Frontend"])
app.include_router(orders_views.router, tags=["Frontend"])

# Serve static files (UI)
app.mount("/static", StaticFiles(directory="static", html=True), name="static")
app.mount("/docs", StaticFiles(directory="docs"), name="docs")

@app.get("/health")
async def health_check():
    """Health check endpoint"""
    return {
        "status": "healthy",
        "service": "BMC Hub",
        "version": get_version()
    }

if __name__ == "__main__":
    import uvicorn
    import os
    
    # Only enable reload in local development (not in Docker) - check both variables
    enable_reload = (
        os.getenv("ENABLE_RELOAD", "false").lower() == "true" or 
        os.getenv("API_RELOAD", "false").lower() == "true"
    )
    
    if enable_reload:
        uvicorn.run(
            "main:app",
            host="0.0.0.0",
            port=8000,
            reload=True,
            reload_includes=["*.py"],
            reload_dirs=["app"],
            reload_excludes=[".git/*", "*.pyc", "__pycache__/*", "logs/*", "uploads/*", "data/*"],
            log_level="info"
        )
    else:
        uvicorn.run(
            "main:app",
            host="0.0.0.0",
            port=8000,
            reload=False
        )