main.py

import os
import uvicorn
import logging
from dotenv import load_dotenv

from infrastructure.database import PostgresLedgerRepo, init_db
from application.use_cases import TransferUseCase
from application.queries import GetBalanceQuery, GetStatementQuery
from presentation import create_app

# Load environment variables
load_dotenv()

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
)
logger = logging.getLogger("python-ledger")

async def app_factory():
    database_url = os.getenv("DATABASE_URL", "postgresql+asyncpg://postgres:postgres@localhost:5432/ledger")
    
    logger.info("Initializing database...")
    _, session_factory = await init_db(database_url)
    
    repo = PostgresLedgerRepo(session_factory)
    
    transfer_use_case = TransferUseCase(repo)
    get_balance_query = GetBalanceQuery(repo)
    get_statement_query = GetStatementQuery(repo)
    
    logger.info("Creating FastAPI application...")
    return create_app(transfer_use_case, get_balance_query, get_statement_query)

if __name__ == "__main__":
    port = int(os.getenv("PORT", 3000))
    # Note: reload=True should not be used with factory path in some production environments,
    # but is extremely helpful for local development.
    uvicorn.run("main:app_factory", host="0.0.0.0", port=port, factory=True, reload=True)