"""Initial migration

Revision ID: 001
Revises:
Create Date: 2024-01-01 00:00:00.000000

"""
import sqlalchemy as sa

from alembic import op

# revision identifiers, used by Alembic.
revision = '001'
down_revision = None
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Create categories table
    op.create_table('categories',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('name', sa.String(length=100), nullable=False),
        sa.Column('description', sa.Text(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_categories_id'), 'categories', ['id'], unique=False)
    op.create_index(op.f('ix_categories_name'), 'categories', ['name'], unique=True)

    # Create suppliers table
    op.create_table('suppliers',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('name', sa.String(length=200), nullable=False),
        sa.Column('contact_person', sa.String(length=100), nullable=True),
        sa.Column('email', sa.String(length=100), nullable=True),
        sa.Column('phone', sa.String(length=20), nullable=True),
        sa.Column('address', sa.Text(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_suppliers_id'), 'suppliers', ['id'], unique=False)
    op.create_index(op.f('ix_suppliers_name'), 'suppliers', ['name'], unique=True)

    # Create inventory_items table
    op.create_table('inventory_items',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('name', sa.String(length=200), nullable=False),
        sa.Column('sku', sa.String(length=50), nullable=False),
        sa.Column('description', sa.Text(), nullable=True),
        sa.Column('quantity', sa.Integer(), nullable=True),
        sa.Column('unit_price', sa.Float(), nullable=False),
        sa.Column('minimum_stock', sa.Integer(), nullable=True),
        sa.Column('category_id', sa.Integer(), nullable=True),
        sa.Column('supplier_id', sa.Integer(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.Column('updated_at', sa.DateTime(), nullable=True),
        sa.ForeignKeyConstraint(['category_id'], ['categories.id'], ),
        sa.ForeignKeyConstraint(['supplier_id'], ['suppliers.id'], ),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_inventory_items_id'), 'inventory_items', ['id'], unique=False)
    op.create_index(op.f('ix_inventory_items_sku'), 'inventory_items', ['sku'], unique=True)


def downgrade() -> None:
    op.drop_index(op.f('ix_inventory_items_sku'), table_name='inventory_items')
    op.drop_index(op.f('ix_inventory_items_id'), table_name='inventory_items')
    op.drop_table('inventory_items')
    op.drop_index(op.f('ix_suppliers_name'), table_name='suppliers')
    op.drop_index(op.f('ix_suppliers_id'), table_name='suppliers')
    op.drop_table('suppliers')
    op.drop_index(op.f('ix_categories_name'), table_name='categories')
    op.drop_index(op.f('ix_categories_id'), table_name='categories')
    op.drop_table('categories')