"""subscribestar_seen_media + subscribestar_failed_media: per-source ledgers

Revision ID: 0054
Revises: 0053
Create Date: 2026-06-17

SubscribeStar native ingester (phase 1 of the gallery-dl → native-core
migration). Mirrors the Patreon ledger tables (0037/0038): a seen-ledger so
routine walks skip already-ingested media (recovery bypasses it) and a
dead-letter ledger so persistently-failing media stops re-burning backfill
chunks. `filehash` is a CDN content hash when present, else a synthesized
``<post_id>:<filename>`` key — hence String(128). UNIQUE (source_id, filehash)
is the upsert key on each.
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0054"
down_revision: Union[str, None] = "0053"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "subscribestar_seen_media",
        sa.Column("id", sa.Integer, primary_key=True),
        sa.Column(
            "source_id",
            sa.Integer,
            sa.ForeignKey("source.id", ondelete="CASCADE"),
            nullable=False,
            index=True,
        ),
        sa.Column("filehash", sa.String(128), nullable=False),
        sa.Column("post_id", sa.String(64), nullable=True),
        sa.Column(
            "seen_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("NOW()"),
        ),
        sa.UniqueConstraint(
            "source_id", "filehash", name="uq_subscribestar_seen_media_source_id"
        ),
    )
    op.create_table(
        "subscribestar_failed_media",
        sa.Column("id", sa.Integer, primary_key=True),
        sa.Column(
            "source_id",
            sa.Integer,
            sa.ForeignKey("source.id", ondelete="CASCADE"),
            nullable=False,
            index=True,
        ),
        sa.Column("filehash", sa.String(128), nullable=False),
        sa.Column("attempts", sa.Integer, nullable=False, server_default="1"),
        sa.Column("last_error", sa.Text, nullable=True),
        sa.Column(
            "first_failed_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("NOW()"),
        ),
        sa.Column(
            "last_failed_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("NOW()"),
        ),
        sa.UniqueConstraint(
            "source_id", "filehash", name="uq_subscribestar_failed_media_source_id"
        ),
    )


def downgrade() -> None:
    op.drop_table("subscribestar_failed_media")
    op.drop_table("subscribestar_seen_media")