"""Initial migration

Revision ID: 01_initial_tables
Revises:
Create Date: 2023-10-20

"""
import sqlalchemy as sa
from alembic import op

# revision identifiers, used by Alembic.
revision = '01_initial_tables'
down_revision = None
branch_labels = None
depends_on = None


def upgrade():
    # Create users table
    op.create_table(
        'users',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('email', sa.String(), nullable=False),
        sa.Column('username', sa.String(), nullable=False),
        sa.Column('hashed_password', sa.String(), nullable=False),
        sa.Column('full_name', sa.String(), nullable=True),
        sa.Column('is_active', sa.Boolean(), nullable=True, default=True),
        sa.Column('is_superuser', sa.Boolean(), nullable=True, default=False),
        sa.Column(
            'created_at',
            sa.DateTime(timezone=True),
            server_default=sa.text('(CURRENT_TIMESTAMP)'),
            nullable=True
        ),
        sa.Column(
            'updated_at',
            sa.DateTime(timezone=True),
            server_default=sa.text('(CURRENT_TIMESTAMP)'),
            nullable=True
        ),
        sa.PrimaryKeyConstraint('id')
    )

    op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
    op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=False)
    op.create_index(op.f('ix_users_username'), 'users', ['username'], unique=True)

    # Create tasks table
    op.create_table(
        'tasks',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('title', sa.String(), nullable=False),
        sa.Column('description', sa.Text(), nullable=True),
        sa.Column(
            'status',
            sa.Enum('todo', 'in_progress', 'done', name='taskstatus'),
            nullable=False,
            default='todo'
        ),
        sa.Column(
            'priority',
            sa.Enum('low', 'medium', 'high', name='taskpriority'),
            nullable=False,
            default='medium'
        ),
        sa.Column('due_date', sa.DateTime(timezone=True), nullable=True),
        sa.Column('is_deleted', sa.Boolean(), nullable=True, default=False),
        sa.Column(
            'created_at',
            sa.DateTime(timezone=True),
            server_default=sa.text('(CURRENT_TIMESTAMP)'),
            nullable=True
        ),
        sa.Column(
            'updated_at',
            sa.DateTime(timezone=True),
            server_default=sa.text('(CURRENT_TIMESTAMP)'),
            nullable=True
        ),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='CASCADE'),
        sa.PrimaryKeyConstraint('id')
    )

    op.create_index(op.f('ix_tasks_id'), 'tasks', ['id'], unique=False)
    op.create_index(op.f('ix_tasks_title'), 'tasks', ['title'], unique=False)


def downgrade():
    # Drop tasks table
    op.drop_index(op.f('ix_tasks_title'), table_name='tasks')
    op.drop_index(op.f('ix_tasks_id'), table_name='tasks')
    op.drop_table('tasks')

    # Drop users table
    op.drop_index(op.f('ix_users_username'), table_name='users')
    op.drop_index(op.f('ix_users_id'), table_name='users')
    op.drop_index(op.f('ix_users_email'), table_name='users')
    op.drop_table('users')