//! Integration tests for the article history and provenance endpoints.
//!
//! Tests:
//! - GET /api/v1/article-history — list article history
//! - DELETE /api/v1/article-history — clear article history
//! - GET /api/v1/syntheses/:id/provenance — get provenance for a synthesis
//!
//! Covers authentication, empty-state responses, and nonexistent lookups.
//!
//! Requires a running Postgres instance. Set `TEST_DATABASE_URL` to run.

mod common;

use axum::http::StatusCode;

fn require_test_db() -> bool {
    std::env::var("TEST_DATABASE_URL").is_ok()
}

// ═══════════════════════════════════════════════════════════════════════════
// Authentication
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn list_article_history_without_auth_returns_401() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let (status, body) = app
        .get_with_session("/api/v1/article-history", "invalid-token")
        .await;

    assert_eq!(
        status,
        StatusCode::UNAUTHORIZED,
        "GET /article-history without auth should return 401"
    );
    assert_eq!(body["error"], "unauthorized");
}

// ═══════════════════════════════════════════════════════════════════════════
// List — empty state
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn list_article_history_returns_empty_initially() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let (_user_id, session) = app
        .create_authenticated_user("history-empty@example.com")
        .await;

    let (status, resp) = app
        .get_with_session("/api/v1/article-history", &session)
        .await;

    assert_eq!(
        status,
        StatusCode::OK,
        "GET /article-history should return 200"
    );
    let items = resp["items"]
        .as_array()
        .expect("Response should contain an items array");
    assert!(items.is_empty(), "New user should have empty article history");
    assert_eq!(resp["total"], 0);
}

// ═══════════════════════════════════════════════════════════════════════════
// Clear history
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn clear_article_history_returns_200() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let (_user_id, session) = app
        .create_authenticated_user("history-clear@example.com")
        .await;

    let (status, resp) = app
        .delete_with_session("/api/v1/article-history", &session)
        .await;

    assert_eq!(
        status,
        StatusCode::OK,
        "DELETE /article-history should return 200"
    );
    assert_eq!(resp["deleted"], 0, "No entries to delete for a new user");
}

// ═══════════════════════════════════════════════════════════════════════════
// Provenance — nonexistent synthesis
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn get_provenance_for_nonexistent_synthesis_returns_404() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let (_user_id, session) = app
        .create_authenticated_user("provenance-404@example.com")
        .await;

    let random_id = uuid::Uuid::new_v4();
    let (status, _resp) = app
        .get_with_session(
            &format!("/api/v1/syntheses/{}/provenance", random_id),
            &session,
        )
        .await;

    assert_eq!(
        status,
        StatusCode::NOT_FOUND,
        "GET /syntheses/:id/provenance for nonexistent synthesis should return 404"
    );
}