from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

# Scheduler imports
from contextlib import asynccontextmanager
from scheduler.scheduler import scheduler
from scheduler.task_registry import task_registry
from scheduler.tasks.cijene_task import CijeneDataFetchTask
from scheduler.tasks.cleanup_task import DatabaseCleanupTask

# Routes imports
from api.product_routes import router as product_router
from api.receipt_routes import router as receipt_router
from api.scrape_routes import router as scrape_router
from api.cijene_routes import router as cijene_router
from api.similarity_routes import router as similarity_router
from api.geocoding_routes import router as geocoding_router

@asynccontextmanager
async def lifespan(app: FastAPI):
    # Register task classes
    task_registry.register_task_class("cijene_fetch", CijeneDataFetchTask)
    task_registry.register_task_class("database_cleanup", DatabaseCleanupTask)
    
    # Create task instances
    fetch_task = task_registry.create_task(
        "cijene_fetch", 
        "daily_cijene_fetch",
        name="Daily Cijene Data Fetch"
    )
    
    cleanup_task = task_registry.create_task(
        "database_cleanup",
        "daily_cleanup", 
        name="Daily Database Cleanup",
        dependencies=["daily_cijene_fetch"]  # Run after fetch
    )
    
    # Schedule the job chain
    scheduler.add_daily_job(
        "daily_data_pipeline",
        ["daily_cijene_fetch", "daily_cleanup"],
        hour=16, minute=58
    )
    
    # Add event handlers
    async def job_completed_handler(job_id: str, results: dict):
        print(f"✅ Job {job_id} completed successfully!")
    
    async def job_failed_handler(job_id: str, results: dict):
        print(f"❌ Job {job_id} failed!")
    
    scheduler.register_event_handler('job_completed', job_completed_handler)
    scheduler.register_event_handler('job_failed', job_failed_handler)
    
    # Start scheduler
    scheduler.start()
    yield
    
    # Shutdown
    scheduler.stop()

# Initialize FastAPI
app = FastAPI(title="SupaKuna API", lifespan=lifespan)

# CORS configuration
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
    expose_headers=["*"]
)

# Add routers
app.include_router(product_router)
app.include_router(receipt_router)
app.include_router(scrape_router)
app.include_router(cijene_router)
app.include_router(similarity_router)
app.include_router(geocoding_router)

@app.get("/", tags=["Health"])
def health_check():
    return {"status": "OK"}