"""
data source module
Support K-line data acquisition for multiple markets

Improved version (refer to daily_stock_analysis project):
- Fuse protection (circuit_breaker)
- Data cache (cache_manager)
- Anti-ban strategy (rate_limiter)
"""

from app.data_sources.cache_manager import DataCache, get_kline_cache, get_realtime_cache, get_stock_info_cache
from app.data_sources.circuit_breaker import CircuitBreaker, get_realtime_circuit_breaker
from app.data_sources.factory import DataSourceFactory
from app.data_sources.rate_limiter import RateLimiter, get_random_user_agent, random_sleep, retry_with_backoff

__all__ = [
    # factory
    "DataSourceFactory",
    # fuse
    "CircuitBreaker",
    "get_realtime_circuit_breaker",
    # cache
    "DataCache",
    "get_realtime_cache",
    "get_kline_cache",
    "get_stock_info_cache",
    # current limiter
    "RateLimiter",
    "get_random_user_agent",
    "random_sleep",
    "retry_with_backoff",
]