"""SQLAlchemy models for authentication

資料表結構：
- user_sessions: 儲存使用者 session 資料，包含加密密碼用於自動刷新
- users: 永久儲存使用者資訊 (用於報告生成時的姓名解析)
"""
from sqlalchemy import Column, Integer, String, DateTime, Index
from datetime import datetime
from app.core.database import Base


class UserSession(Base):
    """User session model with encrypted password for auto-refresh"""

    __tablename__ = "user_sessions"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(255), nullable=False, comment="User email from AD")
    display_name = Column(String(255), nullable=False, comment="Display name for chat")
    internal_token = Column(
        String(255), unique=True, nullable=False, index=True, comment="Internal session token (UUID)"
    )
    ad_token = Column(String(500), nullable=False, comment="AD API token")
    encrypted_password = Column(String(500), nullable=False, comment="AES-256 encrypted password")
    ad_token_expires_at = Column(DateTime, nullable=False, comment="AD token expiry time")
    refresh_attempt_count = Column(
        Integer, default=0, nullable=False, comment="Failed refresh attempts counter"
    )
    last_activity = Column(
        DateTime, default=datetime.utcnow, nullable=False, comment="Last API request time"
    )
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)


class User(Base):
    """Permanent user information for display name resolution in reports

    This table stores user information from AD API and persists even after
    session expiration. Used for:
    - Displaying user names (instead of emails) in generated reports
    - Tracking user metadata (office location, job title)
    """

    __tablename__ = "users"

    user_id = Column(
        String(255), primary_key=True, comment="User email address (e.g., ymirliu@panjit.com.tw)"
    )
    display_name = Column(
        String(255), nullable=False, comment="Display name from AD (e.g., 'ymirliu 劉念蓉')"
    )
    office_location = Column(
        String(100), nullable=True, comment="Office location from AD (e.g., '高雄')"
    )
    job_title = Column(
        String(100), nullable=True, comment="Job title from AD"
    )
    last_login_at = Column(
        DateTime, nullable=True, comment="Last login timestamp"
    )
    created_at = Column(
        DateTime, default=datetime.utcnow, nullable=False, comment="First login timestamp"
    )

    # Indexes
    __table_args__ = (
        Index("ix_users_display_name", "display_name"),
    )