"""Layout model – stores a floor-plan / property map with placed device widgets."""
from datetime import datetime
from app import db


class Layout(db.Model):
    __tablename__ = "layouts"

    id          = db.Column(db.Integer, primary_key=True)
    name        = db.Column(db.String(128), nullable=False)
    description = db.Column(db.String(256), nullable=True)

    # Custom JSON schema (not raw Konva JSON) so we stay schema-independent:
    # {
    #   "structure": [ {id, tool, x, y, w, h, rotation, text, points}, … ],
    #   "devices":   [ {id, boardId, entityType, entityNum, x, y}, … ]
    # }
    canvas_json   = db.Column(db.Text, nullable=True)

    # PNG data-url for thumbnail shown on the list page
    thumbnail_b64 = db.Column(db.Text, nullable=True)

    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    def __repr__(self):
        return f"<Layout {self.name!r} id={self.id}>"