"""ORM 模型。

Candle 表设计与 TimescaleDB hypertable 完全兼容：将来在目标 PG 库执行
  SELECT create_hypertable('candles', 'ts');
即可升级为时序表 + Continuous Aggregates 多周期预聚合，无需改表结构。

智能选股直接读 candles 不复权底座（market_daily 已退役）；
daily_snapshot 存每日指标快照（估值/市值，选股过滤用）。
"""
from datetime import date, datetime

from sqlalchemy import BigInteger, Boolean, Date, DateTime, Float, ForeignKey, Index, Integer, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column, relationship

from .db import Base


def _utcnow() -> datetime:
    # naive UTC，统一存储避免时区带来的麻烦
    from datetime import timezone
    return datetime.now(timezone.utc).replace(tzinfo=None)


class Candle(Base):
    __tablename__ = "candles"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    symbol: Mapped[str] = mapped_column(String(16), index=True)
    timeframe: Mapped[str] = mapped_column(String(4), default="1d", index=True)
    ts: Mapped[datetime] = mapped_column(DateTime, index=True)  # bar 开始时间
    open: Mapped[float] = mapped_column(Float)
    high: Mapped[float] = mapped_column(Float)
    low: Mapped[float] = mapped_column(Float)
    close: Mapped[float] = mapped_column(Float)
    volume: Mapped[float] = mapped_column(Float)
    amount: Mapped[float | None] = mapped_column(Float)    # 成交额（元）；TDX 原生 float32
    turnover: Mapped[float | None] = mapped_column(Float)  # 换手率 %（daily_basic，2000 年起）

    __table_args__ = (
        UniqueConstraint("symbol", "timeframe", "ts", name="uq_candle_sym_tf_ts"),
    )


class BacktestRun(Base):
    """回测运行注册表（可复现/可审计/可回归对比的基础）。

    完整版应记录 策略版本 + 参数快照 + 数据快照（复权/数据源/库版本）+ 环境指纹 + 结果指纹。
    MVP 先落关键字段，结构就位。
    """
    __tablename__ = "backtest_runs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow)
    symbol: Mapped[str] = mapped_column(String(16))
    strategy: Mapped[str] = mapped_column(String(64))
    timeframe: Mapped[str] = mapped_column(String(4), default="1d")
    params_json: Mapped[str] = mapped_column(String, default="{}")
    initial_cash: Mapped[float] = mapped_column(Float, default=100000.0)
    total_return: Mapped[float] = mapped_column(Float, default=0.0)
    max_drawdown: Mapped[float] = mapped_column(Float, default=0.0)
    sharpe: Mapped[float] = mapped_column(Float, default=0.0)
    num_trades: Mapped[int] = mapped_column(Integer, default=0)


class StockBasic(Base):
    """A股股票列表（stock_basic 快照；选股展示名称、排除 ST/退市/北交所的依据）。"""
    __tablename__ = "stock_basic"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), unique=True, index=True)  # 000001.SZ
    symbol: Mapped[str] = mapped_column(String(10), index=True)                # 000001
    name: Mapped[str] = mapped_column(String(32))
    area: Mapped[str | None] = mapped_column(String(32))
    industry: Mapped[str | None] = mapped_column(String(32))
    market: Mapped[str | None] = mapped_column(String(32))                     # 主板/创业板/科创板/北交所
    exchange: Mapped[str] = mapped_column(String(8))                           # SSE/SZSE/BSE
    list_status: Mapped[str] = mapped_column(String(2), index=True)            # L上市 D退市 P暂停
    list_date: Mapped[str] = mapped_column(String(8), default="")
    delist_date: Mapped[str | None] = mapped_column(String(8))


class EtfBasic(Base):
    """场内 ETF 列表（东财全市场快照；ETF 同步任务维护，行情另走 candles 底座）。

    ts_code 如 510300.SH；symbol 为 6 位纯数字，与 candles.symbol 同口径。
    代码区间与股票不冲突：沪 51/56/58 开头、深 159 开头。
    """
    __tablename__ = "etf_basic"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), unique=True, index=True)
    symbol: Mapped[str] = mapped_column(String(10), index=True)                # 510300
    name: Mapped[str] = mapped_column(String(64))
    exchange: Mapped[str] = mapped_column(String(8))                           # SH/SZ
    list_date: Mapped[str | None] = mapped_column(String(8))                   # YYYYMMDD（首根K线日回填）
    total_mv: Mapped[float | None] = mapped_column(Float)                      # 总市值（元，东财快照）
    circ_mv: Mapped[float | None] = mapped_column(Float)                       # 流通市值（元）
    turnover_rate: Mapped[float | None] = mapped_column(Float)                 # 换手率 %
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, onupdate=_utcnow)


class StockCompany(Base):
    """上市公司基本信息（tushare stock_company，详情页按需单查懒加载 + 30 天新鲜度）。

    行存在但 com_name 为 NULL = 负缓存墓碑（tushare 无此股，避免无数据代码反复穿透）。
    """
    __tablename__ = "stock_company"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), unique=True, index=True)   # 000001.SZ
    com_name: Mapped[str | None] = mapped_column(String(255))                   # 公司全称
    com_id: Mapped[str | None] = mapped_column(String(32))                      # 统一社会信用代码
    chairman: Mapped[str | None] = mapped_column(String(128))                   # 法人代表
    manager: Mapped[str | None] = mapped_column(String(128))                    # 总经理
    secretary: Mapped[str | None] = mapped_column(String(128))                  # 董秘
    reg_capital: Mapped[float | None] = mapped_column(Float)                    # 注册资本（万元）
    setup_date: Mapped[str | None] = mapped_column(String(8))                   # 注册日期 YYYYMMDD
    province: Mapped[str | None] = mapped_column(String(32))
    city: Mapped[str | None] = mapped_column(String(32))
    introduction: Mapped[str | None] = mapped_column(Text)                      # 公司介绍
    website: Mapped[str | None] = mapped_column(String(255))
    email: Mapped[str | None] = mapped_column(String(255))
    office: Mapped[str | None] = mapped_column(String(255))                     # 办公地址
    employees: Mapped[int | None] = mapped_column(Integer)                      # 员工人数
    main_business: Mapped[str | None] = mapped_column(Text)                     # 主要业务及产品
    business_scope: Mapped[str | None] = mapped_column(Text)                    # 经营范围
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, onupdate=_utcnow)


class StockFinancial(Base):
    """个股财务数据宽表（fina_indicator 指标 + 三大报表关键绝对值，按报告期一行）。

    详情页懒加载，四源合并 upsert：金额单位元（Tushare 原始），
    比率/同比为百分数。fina_indicator 列无 report_type 概念；
    三大报表列只取 report_type=1（合并报表）。
    """
    __tablename__ = "stock_financial"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)               # 000001.SZ
    end_date: Mapped[str] = mapped_column(String(8))                           # 报告期 YYYYMMDD
    ann_date: Mapped[str | None] = mapped_column(String(8))                    # 公告日 YYYYMMDD
    # ---- fina_indicator（doc 79）----
    eps: Mapped[float | None] = mapped_column(Float)                           # 基本每股收益（元）
    bps: Mapped[float | None] = mapped_column(Float)                           # 每股净资产（元）
    ocfps: Mapped[float | None] = mapped_column(Float)                         # 每股经营现金流净额（元）
    roe: Mapped[float | None] = mapped_column(Float)                           # 净资产收益率 %
    roe_dt: Mapped[float | None] = mapped_column(Float)                        # 扣非净资产收益率 %
    grossprofit_margin: Mapped[float | None] = mapped_column(Float)            # 销售毛利率 %
    netprofit_margin: Mapped[float | None] = mapped_column(Float)              # 销售净利率 %
    debt_to_assets: Mapped[float | None] = mapped_column(Float)                # 资产负债率 %
    or_yoy: Mapped[float | None] = mapped_column(Float)                        # 营业收入同比 %
    netprofit_yoy: Mapped[float | None] = mapped_column(Float)                 # 归母净利润同比 %
    dt_netprofit_yoy: Mapped[float | None] = mapped_column(Float)              # 扣非净利润同比 %
    profit_dedt: Mapped[float | None] = mapped_column(Float)                   # 扣非净利润（元）
    rd_exp: Mapped[float | None] = mapped_column(Float)                        # 研发投入（元）
    # ---- income（doc 33，report_type=1）----
    total_revenue: Mapped[float | None] = mapped_column(Float)                 # 营业总收入（元）
    operate_profit: Mapped[float | None] = mapped_column(Float)                # 营业利润（元）
    n_income_attr_p: Mapped[float | None] = mapped_column(Float)               # 归母净利润（元）
    # ---- balancesheet（report_type=1）----
    total_assets: Mapped[float | None] = mapped_column(Float)                  # 总资产（元）
    total_hldr_eqy: Mapped[float | None] = mapped_column(Float)                # 归母股东权益（元）
    # ---- cashflow（report_type=1）----
    n_cashflow_act: Mapped[float | None] = mapped_column(Float)                # 经营现金流净额（元）
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, onupdate=_utcnow)

    __table_args__ = (
        UniqueConstraint("ts_code", "end_date", name="uq_stock_financial_code_end"),
    )


class StockDividend(Base):
    """个股分红送股（tushare dividend 全历史；每 code 同步时全量替换，无唯一业务键）。

    预案行（div_proc != 实施）无 ex_date，K 线标记与统计只用实施行。
    """
    __tablename__ = "stock_dividend"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)               # 000001.SZ
    end_date: Mapped[str | None] = mapped_column(String(8))                    # 分红年度 YYYYMMDD
    ann_date: Mapped[str | None] = mapped_column(String(8))                    # 预案公告日
    div_proc: Mapped[str | None] = mapped_column(String(16))                   # 实施进度（预案/实施）
    stk_div: Mapped[float | None] = mapped_column(Float)                       # 每股送转
    stk_bo_rate: Mapped[float | None] = mapped_column(Float)                   # 每股送股比例
    stk_co_rate: Mapped[float | None] = mapped_column(Float)                   # 每股转增比例
    cash_div: Mapped[float | None] = mapped_column(Float)                      # 每股分红（税后，元）
    cash_div_tax: Mapped[float | None] = mapped_column(Float)                  # 每股分红（税前，元）
    base_share: Mapped[float | None] = mapped_column(Float)                    # 基准股本（万股）
    record_date: Mapped[str | None] = mapped_column(String(8))                 # 股权登记日
    ex_date: Mapped[str | None] = mapped_column(String(8))                     # 除权除息日（K线标记锚点）
    pay_date: Mapped[str | None] = mapped_column(String(8))                    # 派息日
    div_listdate: Mapped[str | None] = mapped_column(String(8))                # 红股上市日
    imp_ann_date: Mapped[str | None] = mapped_column(String(8))                # 实施公告日
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, onupdate=_utcnow)


class StockSyncState(Base):
    """多行懒加载管道的同步状态（新鲜度门控 + 无数据墓碑）。

    多行表无法像 stock_company 那样用「行存在但业务列 NULL」当墓碑，
    用本表记录每个 (ts_code, kind) 的同步时间与是否有数据。
    kind: finance | dividend。
    """
    __tablename__ = "stock_sync_state"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)
    kind: Mapped[str] = mapped_column(String(16))
    last_synced_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow)
    has_data: Mapped[bool] = mapped_column(Boolean, default=False)

    __table_args__ = (
        UniqueConstraint("ts_code", "kind", name="uq_stock_sync_code_kind"),
    )


class StockReference(Base):
    """个股参考数据（tushare 参考数据版块按需懒加载，一行 = 一股一分类的 JSON 快照）。

    rows_json 存清洗后的 tushare 原始行数组（单位沿用各接口原始口径，见 reference.py 注册表）；
    行存在但 rows_json 为 NULL = 负缓存墓碑（该股该分类确认无数据）。
    kind 白名单见 app/data/reference.py 的 REFERENCE_KINDS。
    """
    __tablename__ = "stock_reference"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)               # 000001.SZ
    kind: Mapped[str] = mapped_column(String(24))                              # top10_holders | ...
    rows_json: Mapped[str | None] = mapped_column(Text)                        # JSON 数组；NULL=墓碑
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, onupdate=_utcnow)

    __table_args__ = (
        UniqueConstraint("ts_code", "kind", name="uq_stock_reference_code_kind"),
    )


# market_daily（全市场未复权日线）已于选股改读 candles 后退役：
# ORM 模型已删，物理表暂留库中作冷备，确认无用后可手动 DROP TABLE market_daily。


class DailySnapshot(Base):
    """每日指标快照（daily_basic）。total_mv/circ_mv 单位万元（Tushare 原始），API 层换算亿元。"""
    __tablename__ = "daily_snapshot"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    trade_date: Mapped[datetime] = mapped_column(DateTime, index=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)
    close: Mapped[float | None] = mapped_column(Float)
    turnover_rate: Mapped[float | None] = mapped_column(Float)     # 换手率 %
    turnover_rate_f: Mapped[float | None] = mapped_column(Float)   # 自由流通换手率 %
    volume_ratio: Mapped[float | None] = mapped_column(Float)      # 量比
    pe: Mapped[float | None] = mapped_column(Float)
    pe_ttm: Mapped[float | None] = mapped_column(Float)
    pb: Mapped[float | None] = mapped_column(Float)
    total_mv: Mapped[float | None] = mapped_column(Float)          # 总市值（万元）
    circ_mv: Mapped[float | None] = mapped_column(Float)           # 流通市值（万元）

    __table_args__ = (
        UniqueConstraint("ts_code", "trade_date", name="uq_snap_code_date"),
    )


class AdjFactor(Base):
    """复权因子（adj_factor，Tushare 原始值；qfq/hfq 本地换算的底座）。

    与 candles(不复权日线) 按 ts_code+trade_date 关联：
      前复权 qfq = 不复权价 × f(t) / f(latest)；后复权 hfq = 不复权价 × f(t)。
    """
    __tablename__ = "adj_factor"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    trade_date: Mapped[datetime] = mapped_column(DateTime, index=True)
    ts_code: Mapped[str] = mapped_column(String(12))
    adj_factor: Mapped[float] = mapped_column(Float)

    __table_args__ = (
        UniqueConstraint("ts_code", "trade_date", name="uq_adj_code_date"),
        # 覆盖索引：因子查询只取 (trade_date, adj_factor) 两列时走 Index Only Scan，
        # 免堆访问（adj_factor 堆碎片化严重，见 alembic/versions/20260902_01）
        Index("ix_adj_code_date_cover", "ts_code", "trade_date", postgresql_include=["adj_factor"]),
    )


class UserPreference(Base):
    """用户偏好键值对（配色/复权口径/MA 周期/副图布局等，value 存 JSON 字符串）。"""
    __tablename__ = "user_preferences"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(BigInteger, ForeignKey("users.id", ondelete="CASCADE"), index=True)
    key: Mapped[str] = mapped_column(String(64))
    value_json: Mapped[str] = mapped_column(Text, default="null")
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, onupdate=_utcnow)

    __table_args__ = (
        UniqueConstraint("user_id", "key", name="uq_user_pref_key"),
    )


class WatchlistItem(Base):
    """自选股（星标置顶）。"""
    __tablename__ = "watchlist_items"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(BigInteger, ForeignKey("users.id", ondelete="CASCADE"), index=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow)

    __table_args__ = (
        UniqueConstraint("user_id", "ts_code", name="uq_watch_user_code"),
    )


class HoldingItem(Base):
    """持仓股（手动标记进「持仓」分类的股票）。"""
    __tablename__ = "holding_items"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(BigInteger, ForeignKey("users.id", ondelete="CASCADE"), index=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow)

    __table_args__ = (
        UniqueConstraint("user_id", "ts_code", name="uq_holding_user_code"),
    )


class UserTrade(Base):
    """交割单导入的实盘成交流水（K线买卖点的数据源，价格为券商成交原始价、不复权）。"""
    __tablename__ = "user_trades"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(BigInteger, ForeignKey("users.id", ondelete="CASCADE"), index=True)
    ts_code: Mapped[str] = mapped_column(String(12), index=True)
    code: Mapped[str] = mapped_column(String(10))                      # 6 位纯数字
    name: Mapped[str | None] = mapped_column(String(32))
    trade_date: Mapped[date] = mapped_column(Date, index=True)          # 成交日期
    direction: Mapped[str] = mapped_column(String(4))                   # buy | sell
    price: Mapped[float | None] = mapped_column(Float)                  # 成交价
    qty: Mapped[float] = mapped_column(Float)                           # 股数
    amount: Mapped[float | None] = mapped_column(Float)                 # 成交金额（元）
    fee: Mapped[float] = mapped_column(Float, default=0.0)              # 手续费合计（元）
    raw_json: Mapped[str | None] = mapped_column(Text)                  # 原始行（审计/排错）
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow)

    __table_args__ = (
        # 重复上传同一份交割单幂等（price 可空导致 PG 对 NULL 不去重，导入时另有 Python 侧兜底）
        UniqueConstraint("user_id", "trade_date", "ts_code", "direction", "price", "qty", name="uq_user_trade_dedup"),
    )


class ScreenerQuery(Base):
    """自然语言选股提问历史（文本 + 解析出的条件，便于一键重跑）。"""
    __tablename__ = "screener_queries"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(BigInteger, ForeignKey("users.id", ondelete="CASCADE"), index=True)
    text: Mapped[str] = mapped_column(String(500))
    conditions_json: Mapped[str | None] = mapped_column(Text)
    hit_count: Mapped[int | None] = mapped_column(Integer)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, index=True)


class TradeCalendar(Base):
    """交易日历缓存（trade_cal 拉取一次宽范围后本地维护，低积分 token 限频 1 次/小时）。"""
    __tablename__ = "trade_calendar"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    trade_date: Mapped[str] = mapped_column(String(8), unique=True, index=True)  # YYYYMMDD


class User(Base):
    """后台登录用户。系统不提供注册接口，只能通过服务器命令创建或改密。"""

    __tablename__ = "users"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
    username: Mapped[str] = mapped_column(String(64), unique=True)
    password_hash: Mapped[str] = mapped_column(String(255))
    password_algo: Mapped[str] = mapped_column(String(16), default="argon2id")
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, index=True)
    failed_login_count: Mapped[int] = mapped_column(Integer, default=0)
    locked_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    password_changed_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
    last_login_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))

    sessions: Mapped[list["AuthSession"]] = relationship(
        back_populates="user", cascade="all, delete-orphan"
    )


class AuthSession(Base):
    """服务端会话。数据库只保存随机 Token 的 SHA-256 摘要。"""

    __tablename__ = "auth_sessions"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey("users.id", ondelete="CASCADE"), index=True
    )
    token_hash: Mapped[str] = mapped_column(String(64), unique=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), index=True)
    last_seen_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
    revoked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), index=True)
    ip_address: Mapped[str | None] = mapped_column(String(45))
    user_agent: Mapped[str | None] = mapped_column(String(512))

    user: Mapped[User] = relationship(back_populates="sessions")