"""CPS 群发短链(cps_link)+ 点击事件(cps_click)。

群发券链接套一层我们自己的短链 `/c/{code}`:用户点 → 记一条 cps_click → 302 跳
target_url(美团短链,微信可打开)。据此统计点击 PV/UV(按群/活动/时段),配合 cps_order
的下单/佣金做"点击→下单→佣金"漏斗。group_id/sid 在 cps_click 里冗余一份,统计直接按
群聚合点击、不必 join cps_link。
"""
from __future__ import annotations

from datetime import datetime

from sqlalchemy import DateTime, Integer, String, func
from sqlalchemy.orm import Mapped, mapped_column

from app.db.base import Base


class CpsLink(Base):
    __tablename__ = "cps_link"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    # 短码:发群链接 /c/{code} 的 code,全局唯一。
    code: Mapped[str] = mapped_column(String(16), unique=True, index=True, nullable=False)
    group_id: Mapped[int] = mapped_column(Integer, index=True, nullable=False)
    activity_id: Mapped[int] = mapped_column(Integer, index=True, nullable=False)
    sid: Mapped[str] = mapped_column(String(64), index=True, nullable=False)
    platform: Mapped[str] = mapped_column(String(20), nullable=False, default="meituan")
    # 302 跳转目标(美团短链,微信内可打开并唤起 App)。
    target_url: Mapped[str] = mapped_column(String(1024), nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )

    def __repr__(self) -> str:  # pragma: no cover
        return f"<CpsLink id={self.id} code={self.code!r} sid={self.sid!r}>"


class CpsClick(Base):
    __tablename__ = "cps_click"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    link_id: Mapped[int] = mapped_column(Integer, index=True, nullable=False)
    group_id: Mapped[int] = mapped_column(Integer, index=True, nullable=False)  # 冗余,按群聚合快
    sid: Mapped[str] = mapped_column(String(64), index=True, nullable=False)    # 冗余
    ip: Mapped[str | None] = mapped_column(String(64), nullable=True)
    ua: Mapped[str | None] = mapped_column(String(512), nullable=True)
    clicked_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), index=True, nullable=False
    )

    def __repr__(self) -> str:  # pragma: no cover
        return f"<CpsClick id={self.id} link_id={self.link_id} group_id={self.group_id}>"