"""add_system_settings_table

Revision ID: ec4cb4a49cde
Revises: 4fa11836f7fd
Create Date: 2026-01-16 18:16:00.283455

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID


# revision identifiers, used by Alembic.
revision: str = 'ec4cb4a49cde'
down_revision: Union[str, None] = '4fa11836f7fd'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Create enum for setting types (only if not exists)
    op.execute("""
        DO $$ BEGIN
            CREATE TYPE settingtype AS ENUM ('plaintext', 'encrypted', 'json');
        EXCEPTION
            WHEN duplicate_object THEN null;
        END $$;
    """)

    # Create system_settings table
    op.execute("""
        CREATE TABLE system_settings (
            id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
            setting_key VARCHAR(100) UNIQUE NOT NULL,
            setting_value TEXT,
            setting_type settingtype NOT NULL DEFAULT 'plaintext'::settingtype,
            description TEXT,
            updated_by UUID REFERENCES users(id) ON DELETE SET NULL,
            created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
            is_sensitive BOOLEAN NOT NULL DEFAULT FALSE
        );

        COMMENT ON COLUMN system_settings.setting_key IS 'Unique setting identifier (e.g., stripe_secret_key)';
        COMMENT ON COLUMN system_settings.setting_value IS 'Setting value (encrypted if setting_type is encrypted)';
        COMMENT ON COLUMN system_settings.setting_type IS 'Type of setting: plaintext, encrypted, or json';
        COMMENT ON COLUMN system_settings.description IS 'Human-readable description of the setting';
        COMMENT ON COLUMN system_settings.updated_by IS 'User who last updated this setting';
        COMMENT ON COLUMN system_settings.is_sensitive IS 'Whether this setting contains sensitive data';
    """)

    # Create indexes
    op.create_index('idx_system_settings_key', 'system_settings', ['setting_key'])
    op.create_index('idx_system_settings_updated_at', 'system_settings', ['updated_at'])


def downgrade() -> None:
    # Drop indexes
    op.drop_index('idx_system_settings_updated_at')
    op.drop_index('idx_system_settings_key')

    # Drop table
    op.drop_table('system_settings')

    # Drop enum
    op.execute('DROP TYPE IF EXISTS settingtype')