"""SQLAlchemy models."""
from datetime import datetime
from sqlalchemy import Column, Integer, String, DateTime, BigInteger, Text, Index, ForeignKey
from sqlalchemy.orm import relationship
from app.database import Base


class Video(Base):
    __tablename__ = "videos"

    id = Column(Integer, primary_key=True, autoincrement=True)
    task_id = Column(String(64), unique=True, index=True, nullable=False)
    url = Column(String(512), nullable=False, index=True)
    title = Column(String(512), default="")
    platform = Column(String(32), default="twitter")
    thumbnail = Column(String(1024), default="")
    quality = Column(String(32), default="")
    format_id = Column(String(64), default="")
    filename = Column(String(512), default="")
    file_path = Column(String(1024), default="")
    file_size = Column(BigInteger, default=0)
    duration = Column(Integer, default=0)
    status = Column(String(16), default="pending")  # pending, downloading, done, error
    error_message = Column(Text, default="")
    progress = Column(Integer, default=0)  # 0-100
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    __table_args__ = (
        Index("ix_video_url_format_id", "url", "format_id"),
    )

    logs = relationship("DownloadLog", back_populates="video", lazy="select")


class DownloadLog(Base):
    __tablename__ = "download_logs"

    id = Column(Integer, primary_key=True, autoincrement=True)
    video_id = Column(Integer, ForeignKey("videos.id", ondelete="CASCADE"), nullable=False, index=True)
    ip = Column(String(64), default="")
    user_agent = Column(Text, default="")
    browser = Column(String(64), default="")    # Chrome / Firefox / Safari / Edge / …
    device = Column(String(32), default="")     # desktop / mobile / tablet / bot
    downloaded_at = Column(DateTime, default=datetime.utcnow, index=True)

    video = relationship("Video", back_populates="logs")