"""Add admin menu configuration table

Revision ID: za0k1l2m3n4o5
Revises: z9j0k1l2m3n4
Create Date: 2026-01-25

Adds configurable admin sidebar menus:
- Platform-level config: Controls which menu items platform admins see
- User-level config: Controls which menu items super admins see
- Opt-out model: All items visible by default
- Mandatory items enforced at application level (companies, vendors, users, settings)
"""

import sqlalchemy as sa

from alembic import op

# revision identifiers, used by Alembic.
revision = "za0k1l2m3n4o5"
down_revision = "z9j0k1l2m3n4"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Create admin_menu_configs table
    op.create_table(
        "admin_menu_configs",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column(
            "platform_id",
            sa.Integer(),
            nullable=True,
            comment="Platform scope - applies to all platform admins of this platform",
        ),
        sa.Column(
            "user_id",
            sa.Integer(),
            nullable=True,
            comment="User scope - applies to this specific super admin",
        ),
        sa.Column(
            "menu_item_id",
            sa.String(50),
            nullable=False,
            comment="Menu item identifier from registry (e.g., 'products', 'inventory')",
        ),
        sa.Column(
            "is_visible",
            sa.Boolean(),
            nullable=False,
            server_default="true",
            comment="Whether this menu item is visible (False = hidden)",
        ),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.func.now(),
        ),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.func.now(),
            onupdate=sa.func.now(),
        ),
        # Foreign keys
        sa.ForeignKeyConstraint(
            ["platform_id"],
            ["platforms.id"],
            ondelete="CASCADE",
        ),
        sa.ForeignKeyConstraint(
            ["user_id"],
            ["users.id"],
            ondelete="CASCADE",
        ),
        sa.PrimaryKeyConstraint("id"),
        # Unique constraints
        sa.UniqueConstraint("platform_id", "menu_item_id", name="uq_platform_menu_config"),
        sa.UniqueConstraint("user_id", "menu_item_id", name="uq_user_menu_config"),
        # Check constraint: exactly one scope must be set
        sa.CheckConstraint(
            "(platform_id IS NOT NULL AND user_id IS NULL) OR "
            "(platform_id IS NULL AND user_id IS NOT NULL)",
            name="ck_admin_menu_config_scope",
        ),
    )

    # Create indexes for performance
    op.create_index(
        "idx_admin_menu_configs_platform_id",
        "admin_menu_configs",
        ["platform_id"],
    )
    op.create_index(
        "idx_admin_menu_configs_user_id",
        "admin_menu_configs",
        ["user_id"],
    )
    op.create_index(
        "idx_admin_menu_configs_menu_item_id",
        "admin_menu_configs",
        ["menu_item_id"],
    )
    op.create_index(
        "idx_admin_menu_config_platform_visible",
        "admin_menu_configs",
        ["platform_id", "is_visible"],
    )
    op.create_index(
        "idx_admin_menu_config_user_visible",
        "admin_menu_configs",
        ["user_id", "is_visible"],
    )


def downgrade() -> None:
    # Drop indexes
    op.drop_index("idx_admin_menu_config_user_visible", table_name="admin_menu_configs")
    op.drop_index("idx_admin_menu_config_platform_visible", table_name="admin_menu_configs")
    op.drop_index("idx_admin_menu_configs_menu_item_id", table_name="admin_menu_configs")
    op.drop_index("idx_admin_menu_configs_user_id", table_name="admin_menu_configs")
    op.drop_index("idx_admin_menu_configs_platform_id", table_name="admin_menu_configs")

    # Drop table
    op.drop_table("admin_menu_configs")