"""Create normalized control-plane tables and workspace-bound foreign keys."""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision = "0002_control_plane"
down_revision = "0001_baseline"
branch_labels = None
depends_on = None


def upgrade() -> None:
    """Create the control schema with composite workspace constraints."""

    op.execute(sa.text("CREATE SCHEMA IF NOT EXISTS control"))
    op.create_table(
        "workspaces",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("name", sa.String(120), nullable=False),
        sa.Column("slug", sa.String(64), nullable=False),
        sa.Column("active", sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column(
            "created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()
        ),
        sa.UniqueConstraint("slug", name="uq_workspaces_slug"),
        schema="control",
    )
    op.create_table(
        "applications",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("name", sa.String(120), nullable=False),
        sa.Column("slug", sa.String(64), nullable=False),
        sa.Column("scopes", sa.JSON(), nullable=False),
        sa.Column("active", sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column(
            "created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()
        ),
        sa.ForeignKeyConstraint(["workspace_id"], ["control.workspaces.id"], ondelete="CASCADE"),
        sa.UniqueConstraint("id", "workspace_id", name="uq_applications_id_workspace"),
        sa.UniqueConstraint("workspace_id", "slug", name="uq_applications_workspace_slug"),
        schema="control",
    )
    op.create_table(
        "spaces",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("name", sa.String(120), nullable=False),
        sa.Column("slug", sa.String(64), nullable=False),
        sa.Column("active", sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column("trust_required", sa.Boolean(), nullable=False, server_default=sa.false()),
        sa.Column("retention_days", sa.Integer(), nullable=True),
        sa.Column(
            "created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()
        ),
        sa.ForeignKeyConstraint(["workspace_id"], ["control.workspaces.id"], ondelete="CASCADE"),
        sa.UniqueConstraint("id", "workspace_id", name="uq_spaces_id_workspace"),
        sa.UniqueConstraint("workspace_id", "slug", name="uq_spaces_workspace_slug"),
        schema="control",
    )
    op.create_table(
        "grants",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("application_id", sa.Uuid(), nullable=False),
        sa.Column("knowledge_space_id", sa.Uuid(), nullable=False),
        sa.Column("role", sa.String(32), nullable=False),
        sa.Column("active", sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column(
            "created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()
        ),
        sa.ForeignKeyConstraint(
            ["application_id", "workspace_id"],
            ["control.applications.id", "control.applications.workspace_id"],
            ondelete="CASCADE",
        ),
        sa.ForeignKeyConstraint(
            ["knowledge_space_id", "workspace_id"],
            ["control.spaces.id", "control.spaces.workspace_id"],
            ondelete="CASCADE",
        ),
        sa.UniqueConstraint(
            "application_id", "knowledge_space_id", "role", name="uq_grants_application_space_role"
        ),
        schema="control",
    )
    op.create_table(
        "policies",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("knowledge_space_id", sa.Uuid(), nullable=True),
        sa.Column("operation", sa.String(120), nullable=False),
        sa.Column("required_scopes", sa.JSON(), nullable=False),
        sa.Column("active", sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column(
            "created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()
        ),
        sa.ForeignKeyConstraint(["workspace_id"], ["control.workspaces.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(
            ["knowledge_space_id", "workspace_id"],
            ["control.spaces.id", "control.spaces.workspace_id"],
            ondelete="CASCADE",
        ),
        schema="control",
    )

    op.create_index(
        "uq_policies_workspace_operation",
        "policies",
        ["workspace_id", "operation"],
        unique=True,
        schema="control",
        postgresql_where=sa.text("knowledge_space_id IS NULL"),
    )
    op.create_index(
        "uq_policies_workspace_space_operation",
        "policies",
        ["workspace_id", "knowledge_space_id", "operation"],
        unique=True,
        schema="control",
        postgresql_where=sa.text("knowledge_space_id IS NOT NULL"),
    )


def downgrade() -> None:
    """Remove the control schema created by this migration."""

    op.execute(sa.text("DROP SCHEMA IF EXISTS control CASCADE"))