"""initial_schema

Revision ID: 4fa9726b4e7c
Revises: 
Create Date: 2026-03-09 21:23:27.997296

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = '4fa9726b4e7c'
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('companies',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('name', sa.String(), nullable=False),
    sa.Column('bank_name', sa.String(), nullable=True),
    sa.Column('account_number', sa.String(), nullable=True),
    sa.Column('city', sa.String(), nullable=True),
    sa.Column('district', sa.String(), nullable=True),
    sa.Column('province', sa.String(), nullable=True),
    sa.Column('email', sa.String(), nullable=True),
    sa.Column('relationship_type', sa.String(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('users',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('username', sa.String(), nullable=False),
    sa.Column('hashed_password', sa.String(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
    sa.PrimaryKeyConstraint('id'),
    sa.UniqueConstraint('username')
    )
    op.create_table('employees',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('name', sa.String(), nullable=False),
    sa.Column('account_name', sa.String(), nullable=False),
    sa.Column('account_number', sa.String(), nullable=False),
    sa.Column('company_id', sa.String(), nullable=True),
    sa.Column('hire_date', sa.Date(), nullable=True),
    sa.Column('base_salary', sa.Integer(), nullable=False),
    sa.Column('active', sa.Boolean(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
    sa.ForeignKeyConstraint(['company_id'], ['companies.id'], ondelete='SET NULL'),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('loans',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('employee_id', sa.String(), nullable=False),
    sa.Column('loan_date', sa.Date(), nullable=False),
    sa.Column('total_amount', sa.Integer(), nullable=False),
    sa.Column('monthly_deduction', sa.Integer(), nullable=False),
    sa.Column('description', sa.Text(), nullable=True),
    sa.Column('remaining_balance', sa.Integer(), nullable=False),
    sa.Column('status', sa.String(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
    sa.ForeignKeyConstraint(['employee_id'], ['employees.id'], ondelete='CASCADE'),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('salary_history',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('employee_id', sa.String(), nullable=False),
    sa.Column('old_salary', sa.Integer(), nullable=True),
    sa.Column('new_salary', sa.Integer(), nullable=False),
    sa.Column('effective_date', sa.Date(), nullable=False),
    sa.Column('notes', sa.Text(), nullable=True),
    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
    sa.ForeignKeyConstraint(['employee_id'], ['employees.id'], ondelete='CASCADE'),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('loan_transactions',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('loan_id', sa.String(), nullable=False),
    sa.Column('employee_id', sa.String(), nullable=False),
    sa.Column('transaction_date', sa.Date(), nullable=False),
    sa.Column('description', sa.Text(), nullable=False),
    sa.Column('debit', sa.Integer(), nullable=False),
    sa.Column('credit', sa.Integer(), nullable=False),
    sa.Column('balance', sa.Integer(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
    sa.ForeignKeyConstraint(['employee_id'], ['employees.id'], ondelete='CASCADE'),
    sa.ForeignKeyConstraint(['loan_id'], ['loans.id'], ondelete='CASCADE'),
    sa.PrimaryKeyConstraint('id')
    )
    # ### end Alembic commands ###


def downgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('loan_transactions')
    op.drop_table('salary_history')
    op.drop_table('loans')
    op.drop_table('employees')
    op.drop_table('users')
    op.drop_table('companies')
    # ### end Alembic commands ###