"""Plex summaries and taglines as plain text

Revision ID: 0101_plex_text_plain
Revises: 0100_drop_plex_item_markers
Create Date: 2026-10-08

Some Plex agents write a summary as HTML (`<p>…</p>`, `&aacute;`), and the app showed the tags as
text. The sync now stores every summary and tagline through `plain_text` (app/plex/plaintext.py);
this cleans the rows it wrote before, through the same function, so nothing waits for a full resync.
"""

import sqlalchemy as sa
from alembic import op

from app.plex.plaintext import plain_text

revision: str = "0101_plex_text_plain"
down_revision: str | None = "0100_drop_plex_item_markers"
branch_labels: str | None = None
depends_on: str | None = None

_COLUMNS = {
    "plex_items": ("summary", "summary_hu", "tagline", "tagline_hu"),
    "plex_shows": ("summary", "summary_hu", "tagline", "tagline_hu"),
    "plex_collections": ("summary",),
}


def upgrade() -> None:
    conn = op.get_bind()
    for table, columns in _COLUMNS.items():
        for col in columns:
            rows = conn.execute(
                sa.text(f"SELECT id, {col} FROM {table} WHERE {col} ~ '[<&]'")
            ).fetchall()
            updates = [
                {"id": rid, "v": clean}
                for rid, value in rows
                if (clean := plain_text(value)) != value
            ]
            if updates:
                conn.execute(sa.text(f"UPDATE {table} SET {col} = :v WHERE id = :id"), updates)


def downgrade() -> None:
    pass  # the markup is not wanted back; the next sync would clean it again