"""Add conversations and messages tables

Revision ID: add_conversations_tables
Revises: 2c5f57dddb78
Create Date: 2024-03-19 10:00:00.000000

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = 'add_conversations_tables'
down_revision = '2c5f57dddb78'
branch_labels = None
depends_on = None


def upgrade():
    # Create conversation table first
    op.create_table('conversation',
        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.Column('created_by', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['created_by'], ['user.id'], ),
        sa.PrimaryKeyConstraint('id')
    )

    # Create conversation_members table
    op.create_table('conversation_members',
        sa.Column('conversation_id', sa.Integer(), nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['conversation_id'], ['conversation.id'], ),
        sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
        sa.PrimaryKeyConstraint('conversation_id', 'user_id')
    )

    # Create message table
    op.create_table('message',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('content', sa.Text(), nullable=False),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.Column('conversation_id', sa.Integer(), nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['conversation_id'], ['conversation.id'], ),
        sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
        sa.PrimaryKeyConstraint('id')
    )


def downgrade():
    # Drop tables in reverse order
    op.drop_table('message')
    op.drop_table('conversation_members')
    op.drop_table('conversation')