from sqlalchemy import Column, Date, DateTime, ForeignKey, Index, Integer, String, Text, UniqueConstraint
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.database import Base


class BillVote(Base):
    __tablename__ = "bill_votes"

    id = Column(Integer, primary_key=True, autoincrement=True)
    bill_id = Column(String, ForeignKey("bills.bill_id", ondelete="CASCADE"), nullable=False)
    congress = Column(Integer, nullable=False)
    chamber = Column(String(50), nullable=False)
    session = Column(Integer, nullable=False)
    roll_number = Column(Integer, nullable=False)
    question = Column(Text)
    description = Column(Text)
    vote_date = Column(Date)
    yeas = Column(Integer)
    nays = Column(Integer)
    not_voting = Column(Integer)
    result = Column(String(200))
    source_url = Column(String)
    fetched_at = Column(DateTime(timezone=True))
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    positions = relationship("MemberVotePosition", back_populates="vote", cascade="all, delete-orphan")

    __table_args__ = (
        Index("ix_bill_votes_bill_id", "bill_id"),
        UniqueConstraint("congress", "chamber", "session", "roll_number", name="uq_bill_votes_roll"),
    )


class MemberVotePosition(Base):
    __tablename__ = "member_vote_positions"

    id = Column(Integer, primary_key=True, autoincrement=True)
    vote_id = Column(Integer, ForeignKey("bill_votes.id", ondelete="CASCADE"), nullable=False)
    bioguide_id = Column(String, ForeignKey("members.bioguide_id", ondelete="SET NULL"), nullable=True)
    member_name = Column(String(200))
    party = Column(String(50))
    state = Column(String(10))
    position = Column(String(50), nullable=False)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    vote = relationship("BillVote", back_populates="positions")

    __table_args__ = (
        Index("ix_member_vote_positions_vote_id", "vote_id"),
        Index("ix_member_vote_positions_bioguide_id", "bioguide_id"),
    )