"""Suite B — Smart Links data model (P0).

Phase 9: Updated to remove stale _get_book_links import (function removed
during pipeline refactoring). Tests now directly validate LinkRepository
behavior and the book.buy_url fallback pattern.
"""

import pytest

from app.repositories.link_repo import LinkRepository


@pytest.mark.p0
@pytest.mark.asyncio
async def test_link_repo_returns_none_when_no_links_row(
    db_session, author_user, book_with_buy_url
):
    """B-03: get_for_book returns None when no links row exists (fallback to book.buy_url)."""
    repo = LinkRepository(db_session)
    link = await repo.get_for_book(book_with_buy_url.id, author_user.id)
    # No row in links table — fallback logic must use book.buy_url directly
    assert link is None
    # Verify book itself has the buy_url (pipeline reads this as fallback)
    assert book_with_buy_url.buy_url == "https://store.example.com/buy"
    assert book_with_buy_url.preview_url == "https://store.example.com/preview"


@pytest.mark.p0
@pytest.mark.asyncio
async def test_smart_links_upsert_creates_links_row(
    db_session, author_user, book_with_buy_url
):
    """B-01: upsert_for_book syncs purchase_url to links table."""
    repo = LinkRepository(db_session)
    await repo.upsert_for_book(
        author_user.id,
        book_with_buy_url.id,
        {
            "purchase_url": "https://store.example.com/new-buy",
            "preview_url": "https://store.example.com/new-preview",
        },
    )
    await db_session.commit()

    link = await repo.get_for_book(book_with_buy_url.id, author_user.id)
    assert link is not None
    assert link.purchase_url == "https://store.example.com/new-buy"
    assert link.preview_url == "https://store.example.com/new-preview"


@pytest.mark.p0
@pytest.mark.asyncio
async def test_smart_links_upsert_updates_existing_row(
    db_session, author_user, book_with_buy_url
):
    """B-02: upsert_for_book updates an existing links row (idempotent)."""
    repo = LinkRepository(db_session)

    # First upsert
    await repo.upsert_for_book(
        author_user.id,
        book_with_buy_url.id,
        {"purchase_url": "https://first.example.com/buy"},
    )
    await db_session.commit()

    # Second upsert — should update, not duplicate
    await repo.upsert_for_book(
        author_user.id,
        book_with_buy_url.id,
        {"purchase_url": "https://updated.example.com/buy"},
    )
    await db_session.commit()

    link = await repo.get_for_book(book_with_buy_url.id, author_user.id)
    assert link is not None
    assert link.purchase_url == "https://updated.example.com/buy"