//! DB-backed tests for the failed-original sweep (`services/maintenance.rs`).
//!
//! Context: the compression worker deliberately no longer deletes an upload's original when
//! its transcode fails — a transient ENOSPC or a codec panic must never destroy the only
//! copy of a photo a guest cannot retake. But the row is soft-deleted and the uploader's
//! quota IS refunded, so those bytes become invisible, unowned and free. A guest hitting a
//! reproducible codec failure could accumulate orphans at no personal cost, and since
//! `active_uploaders` counts only users with non-deleted uploads, dropping out of that count
//! actually RAISES everyone's per-user ceiling while the disk fills.
//!
//! The sweep reclaims them after a retention window. Its selection predicate is the whole
//! safety argument — it must reach the give-up path's leftovers and nothing else — so that
//! is what these tests pin, following the same "reproduce the SQL verbatim" pattern as
//! `upload_concurrency.rs`.
//!
//! `#[sqlx::test]` gives each test a fresh database with the real migrations applied.

mod common;

use common::*;
use sqlx::PgPool;
use uuid::Uuid;

/// SRC: `services/maintenance.rs::cleanup_failed_originals` — the selection, verbatim.
async fn sweep_selects(pool: &PgPool, retention_days: i64) -> Vec<Uuid> {
    sqlx::query_as::<_, (Uuid, String)>(
        "SELECT id, original_path FROM upload
         WHERE compression_status = 'failed'
           AND deleted_at IS NOT NULL
           AND deleted_at < NOW() - ($1 || ' days')::interval
           AND original_path <> ''",
    )
    .bind(retention_days.to_string())
    .fetch_all(pool)
    .await
    .expect("sweep query")
    .into_iter()
    .map(|(id, _)| id)
    .collect()
}

#[allow(clippy::too_many_arguments)]
async fn seed_upload(
    pool: &PgPool,
    event_id: Uuid,
    user_id: Uuid,
    status: &str,
    deleted_days_ago: Option<i64>,
    original_path: &str,
) -> Uuid {
    let id: Uuid = sqlx::query_scalar(
        "INSERT INTO upload (event_id, user_id, original_path, mime_type, original_size_bytes,
                             compression_status, deleted_at)
         VALUES ($1, $2, $3, 'image/jpeg', 1000, $4,
                 CASE WHEN $5::bigint IS NULL THEN NULL
                      ELSE NOW() - ($5::text || ' days')::interval END)
         RETURNING id",
    )
    .bind(event_id)
    .bind(user_id)
    .bind(original_path)
    .bind(status)
    .bind(deleted_days_ago)
    .fetch_one(pool)
    .await
    .expect("seed upload");
    id
}

#[sqlx::test]
async fn sweeps_only_long_failed_soft_deleted_uploads(pool: PgPool) {
    let event_id = seed_event(&pool, "sweep-event").await;
    let user_id = seed_user(&pool, event_id, "Sweeper").await;

    // The one and only thing the sweep may touch: the exact state the compression worker's
    // give-up path leaves behind, aged past the window.
    let target = seed_upload(
        &pool,
        event_id,
        user_id,
        "failed",
        Some(30),
        "originals/e/target.jpg",
    )
    .await;

    // Everything below is a near-miss that must survive.
    // A healthy live upload — the catastrophic case if the predicate were ever loosened.
    let live = seed_upload(
        &pool,
        event_id,
        user_id,
        "done",
        None,
        "originals/e/live.jpg",
    )
    .await;
    // Failed but still inside the retention window: the recovery window is the entire point
    // of keeping the file, so reclaiming it early would defeat the fix it protects.
    let recent = seed_upload(
        &pool,
        event_id,
        user_id,
        "failed",
        Some(1),
        "originals/e/recent.jpg",
    )
    .await;
    // Failed but NOT soft-deleted — not the give-up path; something else set this status.
    let failed_live = seed_upload(
        &pool,
        event_id,
        user_id,
        "failed",
        None,
        "originals/e/failed-live.jpg",
    )
    .await;
    // Soft-deleted by the OWNER, compression fine. Its file is already gone; this row must
    // never be re-processed.
    let owner_deleted = seed_upload(
        &pool,
        event_id,
        user_id,
        "done",
        Some(30),
        "originals/e/owner.jpg",
    )
    .await;
    // Already swept: `original_path` cleared. Re-selecting it every hour would log a
    // phantom reclaim forever.
    let already_swept = seed_upload(&pool, event_id, user_id, "failed", Some(30), "").await;

    let selected = sweep_selects(&pool, 14).await;

    assert_eq!(
        selected,
        vec![target],
        "the sweep must select exactly the aged give-up-path leftovers"
    );
    for (id, what) in [
        (live, "a live upload"),
        (recent, "a failure still inside the retention window"),
        (failed_live, "a failed but not soft-deleted upload"),
        (owner_deleted, "an owner-deleted upload"),
        (already_swept, "an already-swept row"),
    ] {
        assert!(!selected.contains(&id), "the sweep must not touch {what}");
    }
}

#[sqlx::test]
async fn retention_window_is_honoured_at_the_boundary(pool: PgPool) {
    let event_id = seed_event(&pool, "sweep-boundary").await;
    let user_id = seed_user(&pool, event_id, "Boundary").await;

    let inside = seed_upload(
        &pool,
        event_id,
        user_id,
        "failed",
        Some(13),
        "originals/e/inside.jpg",
    )
    .await;
    let outside = seed_upload(
        &pool,
        event_id,
        user_id,
        "failed",
        Some(15),
        "originals/e/outside.jpg",
    )
    .await;

    let selected = sweep_selects(&pool, 14).await;
    assert!(
        selected.contains(&outside),
        "15 days old must be past a 14-day window"
    );
    assert!(
        !selected.contains(&inside),
        "13 days old must still be retained"
    );
}

#[sqlx::test]
async fn clearing_original_path_makes_the_sweep_idempotent(pool: PgPool) {
    // The sweep clears `original_path` after reclaiming the file. Without that, a row whose
    // file is already gone is re-selected on every hourly tick forever.
    let event_id = seed_event(&pool, "sweep-idempotent").await;
    let user_id = seed_user(&pool, event_id, "Idem").await;
    let id = seed_upload(
        &pool,
        event_id,
        user_id,
        "failed",
        Some(30),
        "originals/e/once.jpg",
    )
    .await;

    assert_eq!(sweep_selects(&pool, 14).await, vec![id]);

    sqlx::query("UPDATE upload SET original_path = '' WHERE id = $1")
        .bind(id)
        .execute(&pool)
        .await
        .expect("clear path");

    assert!(
        sweep_selects(&pool, 14).await.is_empty(),
        "a swept row must not come back"
    );
}