//! `upsert_task` against the partial unique index it depends on.
//!
//! `mission_tasks_external_uniq` is declared `WHERE external_id IS NOT NULL`.
//! Postgres will not match a partial index to an `ON CONFLICT` target unless
//! the statement repeats that predicate, so the upsert raised 42P10 on its
//! first row for every caller — the task-card parser (INT markers) and the
//! security scanner. Both map the error to a string their caller logs, so the
//! feature was broken and the platform stayed green.
//!
//! The insert half and the update half are tested separately because they fail
//! differently: a missing conflict target breaks both, but a wrong DO UPDATE
//! breaks only the second write, which is the one that happens on re-run.

use cm_db::repo::missions::{upsert_task, UpsertTask};
use cm_domain::{Workspace, WorkspaceId};
use uuid::Uuid;

async fn seed_phase(pool: &sqlx::PgPool) -> (Uuid, Uuid) {
    let ws = Workspace {
        id: WorkspaceId::new(),
        name: "Task Upsert Test".into(),
        plan: "team".into(),
    };
    cm_db::repo::workspaces::insert(pool, &ws).await.unwrap();
    let mission = Uuid::now_v7();
    sqlx::query(
        "INSERT INTO missions (id, workspace_id, title, template_kind, status)
         VALUES ($1, $2, 'upsert test', 'security_hardening', 'running')",
    )
    .bind(mission)
    .bind(ws.id.as_uuid())
    .execute(pool)
    .await
    .unwrap();
    let phase = Uuid::now_v7();
    sqlx::query(
        "INSERT INTO mission_phases (id, mission_id, kind, order_idx, status)
         VALUES ($1, $2, 'security_scan', 0, 'completed')",
    )
    .bind(phase)
    .bind(mission)
    .execute(pool)
    .await
    .unwrap();
    (mission, phase)
}

#[tokio::test]
async fn the_same_external_id_updates_in_place_instead_of_erroring() {
    let pool = cm_testkit::test_pool().await;
    let (mission_id, phase_id) = seed_phase(&pool).await;

    let first = upsert_task(
        &pool,
        UpsertTask {
            mission_id,
            phase_id,
            external_id: "RUSTSEC-2026-0001",
            title: "advisory: something",
            assigned_agent_id: None,
            status: "created",
            run_id: None,
        },
    )
    .await
    .expect("first upsert must succeed — 42P10 here means the ON CONFLICT \
             target no longer matches the partial unique index");

    // The re-run. A scanner that finds the same advisory twice must not
    // duplicate the row, and must not fail.
    let second = upsert_task(
        &pool,
        UpsertTask {
            mission_id,
            phase_id,
            external_id: "RUSTSEC-2026-0001",
            title: "advisory: something (rescanned)",
            assigned_agent_id: None,
            status: "complete",
            run_id: None,
        },
    )
    .await
    .expect("second upsert must succeed");

    assert_eq!(first, second, "the same (phase_id, external_id) must be one row");

    let (title, status, completed): (String, String, Option<time::OffsetDateTime>) =
        sqlx::query_as("SELECT title, status, completed_at FROM mission_tasks WHERE id = $1")
            .bind(first)
            .fetch_one(&pool)
            .await
            .unwrap();
    assert_eq!(title, "advisory: something (rescanned)");
    assert_eq!(status, "complete");
    assert!(
        completed.is_some(),
        "a task upserted as `complete` must get its completed_at stamped"
    );

    let n: i64 = sqlx::query_scalar("SELECT count(*) FROM mission_tasks WHERE phase_id = $1")
        .bind(phase_id)
        .fetch_one(&pool)
        .await
        .unwrap();
    assert_eq!(n, 1, "two upserts of one external_id left {n} rows");
}