"""add chat tables

Revision ID: 0005
Revises: 0004
Create Date: 2025-01-01 00:00:00.000000
"""

from alembic import op
import sqlalchemy as sa

revision = "0005"
down_revision = "0004"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "conversations",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("title", sa.Text(), nullable=False, server_default=""),
        sa.Column("model", sa.Text(), nullable=False, server_default=""),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
    )

    op.create_table(
        "messages",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column(
            "conversation_id",
            sa.Integer(),
            sa.ForeignKey("conversations.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("role", sa.Text(), nullable=False),
        sa.Column("content", sa.Text(), nullable=False, server_default=""),
        sa.Column(
            "context_note_id",
            sa.Integer(),
            sa.ForeignKey("notes.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
    )

    op.create_index("ix_messages_conversation_id", "messages", ["conversation_id"])


def downgrade() -> None:
    op.drop_index("ix_messages_conversation_id", table_name="messages")
    op.drop_table("messages")
    op.drop_table("conversations")