"""add saved idea enrichment fields

Revision ID: 20260428_add_saved_idea_enrichment
Revises: 20260428_add_saved_ideas
Create Date: 2026-04-28
"""

from __future__ import annotations

from alembic import op
import sqlalchemy as sa

try:
    from sqlalchemy.dialects.postgresql import JSONB
except Exception:  # pragma: no cover
    JSONB = sa.JSON


revision = "20260428_add_saved_idea_enrichment"
down_revision = "20260428_add_saved_ideas"
branch_labels = None
depends_on = None


def _json_type(bind):
    return JSONB() if bind.dialect.name == "postgresql" else sa.JSON()


def _table_exists(bind, table_name: str) -> bool:
    return sa.inspect(bind).has_table(table_name)


def _column_exists(bind, table_name: str, column_name: str) -> bool:
    return any(column["name"] == column_name for column in sa.inspect(bind).get_columns(table_name))


def upgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "saved_ideas"):
        return
    if not _column_exists(bind, "saved_ideas", "enrichment_status"):
        op.add_column(
            "saved_ideas",
            sa.Column("enrichment_status", sa.String(length=32), nullable=False, server_default="baseline"),
        )
    if not _column_exists(bind, "saved_ideas", "enrichment_payload"):
        op.add_column("saved_ideas", sa.Column("enrichment_payload", _json_type(bind), nullable=True))
    if not _column_exists(bind, "saved_ideas", "enrichment_error"):
        op.add_column("saved_ideas", sa.Column("enrichment_error", sa.Text(), nullable=True))
    if not _column_exists(bind, "saved_ideas", "enriched_at"):
        op.add_column("saved_ideas", sa.Column("enriched_at", sa.TIMESTAMP(), nullable=True))


def downgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "saved_ideas"):
        return
    for column_name in ("enriched_at", "enrichment_error", "enrichment_payload", "enrichment_status"):
        if _column_exists(bind, "saved_ideas", column_name):
            op.drop_column("saved_ideas", column_name)