v1.2 scaffold

backend/app/models/scenario.py

@@ -0,0 +1,41 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from sqlalchemy import DateTime, Float, ForeignKey, JSON, String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db.session import Base
+
+
+class Scenario(Base):
+    __tablename__ = "scenarios"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String(255), unique=True)
+    status: Mapped[str] = mapped_column(String(32), default="draft")
+    description: Mapped[str | None] = mapped_column(String(500), nullable=True)
+    overrides: Mapped[dict] = mapped_column(JSON, default=dict)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    results: Mapped[list["CostingResult"]] = relationship(
+        back_populates="scenario",
+        cascade="all, delete-orphan",
+    )
+
+
+class CostingResult(Base):
+    __tablename__ = "costing_results"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    scenario_id: Mapped[int] = mapped_column(ForeignKey("scenarios.id"), index=True)
+    product_id: Mapped[int] = mapped_column(ForeignKey("products.id"), index=True)
+    finished_product_delivered: Mapped[float] = mapped_column(Float)
+    distributor_price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    wholesale_price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    warnings: Mapped[list[str]] = mapped_column(JSON, default=list)
+    details: Mapped[dict] = mapped_column(JSON, default=dict)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    scenario: Mapped[Scenario] = relationship(back_populates="results")
+