"""add_coupon_system

Revision ID: 20251017_0000
Revises: 20251016_0000
Create Date: 2025-10-17 00:00:00.000000

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql
import uuid

# revision identifiers, used by Alembic.
revision = '20251017_0000'
down_revision = '20251016_0000'
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Create coupons table
    op.create_table(
        'coupons',
        sa.Column('id', postgresql.UUID(as_uuid=True), primary_key=True, default=uuid.uuid4),
        sa.Column('code', sa.String(50), nullable=False, unique=True),
        sa.Column('discount_type', sa.String(20), nullable=False),
        sa.Column('discount_value', sa.Integer(), nullable=False),
        sa.Column('max_redemptions', sa.Integer(), nullable=True),
        sa.Column('current_redemptions', sa.Integer(), nullable=False, server_default='0'),
        sa.Column('valid_from', sa.DateTime(timezone=True), nullable=False),
        sa.Column('valid_until', sa.DateTime(timezone=True), nullable=True),
        sa.Column('active', sa.Boolean(), nullable=False, server_default='true'),
        sa.Column('created_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
        sa.Column('extra_data', postgresql.JSON(astext_type=sa.Text()), nullable=True),
    )

    # Create indexes for coupons table
    op.create_index('idx_coupon_code_active', 'coupons', ['code', 'active'])
    op.create_index('idx_coupon_valid_dates', 'coupons', ['valid_from', 'valid_until'])

    # Create coupon_redemptions table
    op.create_table(
        'coupon_redemptions',
        sa.Column('id', postgresql.UUID(as_uuid=True), primary_key=True, default=uuid.uuid4),
        sa.Column('tenant_id', sa.String(255), nullable=False),
        sa.Column('coupon_code', sa.String(50), nullable=False),
        sa.Column('redeemed_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
        sa.Column('discount_applied', postgresql.JSON(astext_type=sa.Text()), nullable=False),
        sa.Column('extra_data', postgresql.JSON(astext_type=sa.Text()), nullable=True),
        sa.ForeignKeyConstraint(['coupon_code'], ['coupons.code'], name='fk_coupon_redemption_code'),
    )

    # Create indexes for coupon_redemptions table
    op.create_index('idx_redemption_tenant', 'coupon_redemptions', ['tenant_id'])
    op.create_index('idx_redemption_coupon', 'coupon_redemptions', ['coupon_code'])
    op.create_index('idx_redemption_tenant_coupon', 'coupon_redemptions', ['tenant_id', 'coupon_code'])


def downgrade() -> None:
    # Drop indexes first
    op.drop_index('idx_redemption_tenant_coupon', table_name='coupon_redemptions')
    op.drop_index('idx_redemption_coupon', table_name='coupon_redemptions')
    op.drop_index('idx_redemption_tenant', table_name='coupon_redemptions')
    op.drop_index('idx_coupon_valid_dates', table_name='coupons')
    op.drop_index('idx_coupon_code_active', table_name='coupons')

    # Drop tables
    op.drop_table('coupon_redemptions')
    op.drop_table('coupons')