"""Dashboard default model: display-PC-IP -> display role (+ business unit).

A single "display" PC image resolves what it should show from its own IP: the
role (shopfloor dashboard, lobby slideshow, or 3D-parts kiosk) and, for the
dashboard role, which business unit. Powers the visitor-location + display-role
lookups the kiosks call at launch.
"""

from shopdb.extensions import db
from .base import BaseModel

# Display role -> the frontend kiosk path it maps to. Kept here so the API and
# any consumer resolve a role to a URL the same way.
DISPLAY_ROLE_PATHS = {
    'dashboard': '/shopfloor',
    'lobby': '/tv',
    'partskiosk': '/parts-kiosk',
}
DISPLAY_ROLES = tuple(DISPLAY_ROLE_PATHS.keys())


class DashboardDefault(BaseModel):
    """Maps a display PC IP address to its display role (+ business unit)."""
    __tablename__ = 'dashboarddefaults'

    dashboarddefaultid = db.Column(db.Integer, primary_key=True)
    ipaddress = db.Column(db.String(50), unique=True, nullable=False)
    # Which display the IP drives. Only the dashboard role uses businessunitid.
    displayrole = db.Column(db.String(20), nullable=False, default='dashboard')
    businessunitid = db.Column(
        db.Integer,
        db.ForeignKey('businessunits.businessunitid'),
        nullable=True
    )
    description = db.Column(db.String(255))

    businessunit = db.relationship('BusinessUnit')

    @property
    def displaypath(self):
        return DISPLAY_ROLE_PATHS.get(self.displayrole)

    def __repr__(self):
        return f"<DashboardDefault {self.ipaddress} -> {self.displayrole}>"