from datetime import datetime

from sqlalchemy import Column, Date, DateTime, Float, ForeignKey, Integer, String
from sqlalchemy.orm import declarative_base, relationship

Base = declarative_base()


class Project(Base):
    __tablename__ = "projects"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String(200), unique=True, nullable=False, index=True)
    description = Column(String(1000), nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    work_logs = relationship(
        "WorkLogEntry",
        back_populates="project",
        cascade="all, delete-orphan",
        passive_deletes=True,
    )


class WorkLogEntry(Base):
    __tablename__ = "work_logs"

    id = Column(Integer, primary_key=True, index=True)
    project_id = Column(
        Integer,
        ForeignKey("projects.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    date = Column(Date, nullable=False, index=True)
    hours = Column(Float, nullable=False)
    description = Column(String(2000), nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    project = relationship("Project", back_populates="work_logs")