"""
数据库模型定义
使用 SQLAlchemy ORM 定义数据表结构
"""
from sqlalchemy import create_engine, Column, Integer, String, Float, DateTime, Boolean, Text
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, Session
from datetime import datetime
import logging

logger = logging.getLogger(__name__)

# 声明基类
Base = declarative_base()


# ============================================
# 用户表
# ============================================

class User(Base):
    """用户表"""
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(50), unique=True, index=True, nullable=False)
    hashed_password = Column(String(200), nullable=False)
    email = Column(String(100), unique=True, index=True)
    full_name = Column(String(100))
    is_active = Column(Boolean, default=True)
    is_superuser = Column(Boolean, default=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)


# ============================================
# API Token 表
# ============================================

class APIToken(Base):
    """API Token 表"""
    __tablename__ = "api_tokens"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, nullable=False)
    token = Column(String(200), unique=True, index=True, nullable=False)
    name = Column(String(100))
    is_active = Column(Boolean, default=True)
    expires_at = Column(DateTime)
    created_at = Column(DateTime, default=datetime.utcnow)


# ============================================
# 交易日志表
# ============================================

class TradeLog(Base):
    """交易日志表"""
    __tablename__ = "trade_logs"

    id = Column(Integer, primary_key=True, index=True)
    order_id = Column(String(50), index=True)
    symbol = Column(String(20), index=True)
    exchange = Column(String(20))
    direction = Column(String(10))
    order_type = Column(String(20))
    volume = Column(Float)
    price = Column(Float)
    traded_volume = Column(Float)
    traded_price = Column(Float)
    status = Column(String(20), index=True)
    time = Column(DateTime, index=True)
    created_at = Column(DateTime, default=datetime.utcnow)


# ============================================
# 策略日志表
# ============================================

class StrategyLog(Base):
    """策略日志表"""
    __tablename__ = "strategy_logs"

    id = Column(Integer, primary_key=True, index=True)
    strategy_name = Column(String(50), index=True)
    level = Column(String(20))  # INFO, WARNING, ERROR
    message = Column(Text)
    created_at = Column(DateTime, default=datetime.utcnow, index=True)


# ============================================
# 系统配置表
# ============================================

class SystemConfig(Base):
    """系统配置表"""
    __tablename__ = "system_configs"

    id = Column(Integer, primary_key=True, index=True)
    key = Column(String(100), unique=True, index=True, nullable=False)
    value = Column(Text)
    description = Column(String(200))
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)


# ============================================
# 数据库初始化
# ============================================

# 全局数据库引擎和会话
_engine = None
_SessionLocal = None


def init_database(database_url: str = "sqlite:///sanguo_web.db") -> None:
    """
    初始化数据库

    - **database_url**: 数据库连接字符串
    """
    global _engine, _SessionLocal

    logger.info(f"Initializing database: {database_url}")

    _engine = create_engine(
        database_url,
        connect_args={"check_same_thread": False} if database_url.startswith("sqlite") else {},
        echo=False
    )

    _SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=_engine)

    # 创建所有表
    Base.metadata.create_all(bind=_engine)

    logger.info("Database initialized successfully")


def get_db() -> Session:
    """
    获取数据库会话

    用于依赖注入
    """
    global _SessionLocal

    if _SessionLocal is None:
        init_database()

    db = _SessionLocal()
    try:
        yield db
    finally:
        db.close()


def get_engine():
    """获取数据库引擎"""
    if _engine is None:
        init_database()
    return _engine


__all__ = [
    "User",
    "APIToken",
    "TradeLog",
    "StrategyLog",
    "SystemConfig",
    "init_database",
    "get_db",
    "get_engine",
]