"""fiscal_idempotency_keys (Task 5): backs the `Idempotency-Key` contract of
`POST /v1/emissoes` (design spec decision #6) -- a separate table so the
Task 3 `fiscal_documents` migration stays untouched. See
`documents.models.FiscalIdempotencyKey`'s docstring for the two-layer
idempotency pattern this table's UNIQUE constraint exists for.

Revision ID: 30a80fe36910
Revises: 523235d06bd5
Create Date: 2026-07-22 00:00:00.000000

"""
from __future__ import annotations

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "30a80fe36910"
down_revision: Union[str, Sequence[str], None] = "523235d06bd5"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "fiscal_idempotency_keys",
        sa.Column("id", sa.UUID(), nullable=False),
        sa.Column("product_id", sa.UUID(), nullable=False),
        sa.Column("idempotency_key", sa.String(length=255), nullable=False),
        sa.Column("document_id", sa.UUID(), nullable=False),
        sa.Column(
            "created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False
        ),
        sa.Column(
            "updated_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False
        ),
        sa.ForeignKeyConstraint(["product_id"], ["products.id"]),
        sa.ForeignKeyConstraint(["document_id"], ["fiscal_documents.id"]),
        sa.PrimaryKeyConstraint("id"),
        sa.UniqueConstraint(
            "product_id", "idempotency_key", name="uq_fiscal_idempotency_key_product_key"
        ),
    )


def downgrade() -> None:
    op.drop_table("fiscal_idempotency_keys")