import sys
from pathlib import Path

# Добавляем корневую директорию проекта в PYTHONPATH при прямом запуске
# Это нужно, чтобы Python мог найти модуль 'app'
# Проверяем, запускается ли файл напрямую, проверяя имя скрипта
if sys.argv and len(sys.argv) > 0:
    script_path = Path(sys.argv[0]).resolve()
    current_file = Path(__file__).resolve()
    # Если скрипт запускается напрямую (не через модуль)
    if script_path == current_file or script_path.name == current_file.name:
        project_root = current_file.parent.parent  # new-planet-backend
        if str(project_root) not in sys.path:
            sys.path.insert(0, str(project_root))

from fastapi import FastAPI, Request
from fastapi.exceptions import RequestValidationError
from starlette.exceptions import HTTPException as StarletteHTTPException
from app.core.config import settings
from app.core.logging import setup_logging
from app.api.v1.router import api_router
from app.middleware import (
    setup_cors,
    validation_exception_handler,
    http_exception_handler,
    general_exception_handler,
    RateLimitMiddleware,
)
from contextlib import asynccontextmanager

# Настройка логирования
logger = setup_logging(settings.DEBUG and "DEBUG" or "INFO")


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Lifecycle events"""
    # Startup
    logger.info("Starting up...")
    from app.services.cache_service import cache_service
    await cache_service.connect()
    yield
    # Shutdown
    logger.info("Shutting down...")
    await cache_service.disconnect()


app = FastAPI(
    title=settings.PROJECT_NAME,
    version=settings.VERSION,
    openapi_url=f"{settings.API_V1_STR}/openapi.json",
    docs_url="/docs",
    redoc_url="/redoc",
    lifespan=lifespan
)

# Middleware
setup_cors(app)
if settings.RATE_LIMIT_ENABLED:
    app.add_middleware(RateLimitMiddleware)

# Exception handlers
app.add_exception_handler(RequestValidationError, validation_exception_handler)
app.add_exception_handler(StarletteHTTPException, http_exception_handler)
app.add_exception_handler(Exception, general_exception_handler)

# Routers
app.include_router(api_router, prefix=settings.API_V1_STR)


@app.get("/")
async def root():
    """Root endpoint"""
    return {
        "message": "Новая Планета API",
        "version": settings.VERSION,
        "docs": "/docs"
    }


@app.get("/health")
async def health_check():
    """Health check endpoint"""
    return {"status": "healthy"}


if __name__ == "__main__":
    import uvicorn
    uvicorn.run(
        "app.main:app",
        host="127.0.0.1",
        port=8000,
        reload=settings.DEBUG
    )