"""create document tables

Revision ID: 0001
Revises:
Create Date: 2026-04-14

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "0001"
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:
    op.create_table(
        "documents",
        sa.Column("id", sa.String(), primary_key=True),
        sa.Column("user_id", sa.String(), nullable=False),
        sa.Column("filename", sa.String(), nullable=False),
        sa.Column("file_path", sa.String(), nullable=False),
        sa.Column("file_size", sa.Integer(), nullable=False),
        sa.Column("status", sa.String(), nullable=False),
        sa.Column("document_type", sa.String(), nullable=True),
        sa.Column("raw_text", sa.Text(), nullable=True),
        sa.Column("extracted_data", sa.Text(), nullable=True),
        sa.Column("tags", sa.Text(), nullable=True),
        sa.Column("error_message", sa.String(500), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("now()"),
            nullable=False,
        ),
        sa.Column("processed_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.create_index("ix_documents_user_id", "documents", ["user_id"])

    op.create_table(
        "document_categories",
        sa.Column("id", sa.String(), primary_key=True),
        sa.Column("user_id", sa.String(), nullable=False),
        sa.Column("name", sa.String(128), nullable=False),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("now()"),
            nullable=False,
        ),
    )
    op.create_index("ix_document_categories_user_id", "document_categories", ["user_id"])

    op.create_table(
        "document_category_assignments",
        sa.Column(
            "document_id",
            sa.String(),
            sa.ForeignKey("documents.id", ondelete="CASCADE"),
            primary_key=True,
        ),
        sa.Column(
            "category_id",
            sa.String(),
            sa.ForeignKey("document_categories.id", ondelete="CASCADE"),
            primary_key=True,
        ),
    )


def downgrade() -> None:
    op.drop_table("document_category_assignments")
    op.drop_index("ix_document_categories_user_id", "document_categories")
    op.drop_table("document_categories")
    op.drop_index("ix_documents_user_id", "documents")
    op.drop_table("documents")