"""Setting model - key-value application settings."""

import secrets
from datetime import datetime
from sqlalchemy import String, func
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import Mapped, mapped_column

from app.models.base import Base


def generate_api_key() -> str:
    """Generate a secure random API key."""
    return secrets.token_urlsafe(32)


class Setting(Base):
    """Key-value setting storage."""

    __tablename__ = "settings"

    key: Mapped[str] = mapped_column(String(100), primary_key=True)
    value: Mapped[dict] = mapped_column(JSONB, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(default=func.now(), onupdate=func.now())

    def __repr__(self) -> str:
        return f"<Setting {self.key}>"

    def to_dict(self) -> dict:
        """Convert to dictionary for API responses."""
        return {
            "key": self.key,
            "value": self.value,
            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
        }


# Default settings that should exist
DEFAULT_SETTINGS = {
    "download.parallel_limit": 3,
    "download.rate_limit": 3.0,
    "download.retry_count": 3,
    "download.schedule_interval": 28800,  # 8 hours
    "notification.enabled": False,
    "notification.webhook_url": None,
    "dashboard.failure_threshold": 5,
}

# Key for the extension API key setting
EXTENSION_API_KEY_SETTING = "security.extension_api_key"

# Key for cached storage stats
STORAGE_STATS_SETTING = "cache.storage_stats"