//! Integration tests for the sources CRUD endpoints (Phase 2).
//!
//! Tests:
//! - GET /api/v1/sources — list user's sources
//! - POST /api/v1/sources — create a single source
//! - DELETE /api/v1/sources/:id — delete a source
//! - POST /api/v1/sources/bulk — bulk import from JSON array
//! - POST /api/v1/sources/import-csv — import from CSV file upload
//! - GET /api/v1/sources/export-csv — download sources as CSV
//!
//! Covers authentication, validation, ownership isolation, max limit,
//! duplicate handling, and CSV roundtrip.
//!
//! Requires a running Postgres instance. Set `TEST_DATABASE_URL` to run.

mod common;

use axum::body::Body;
use axum::http::{Method, Request, StatusCode};

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

/// Helper: create a theme and return its id.
async fn create_theme(app: &common::TestApp, session: &str) -> String {
    let body = serde_json::json!({
        "name": "Test Theme",
        "theme": "Test",
        "categories": ["Cat"]
    });
    let (status, resp) = app
        .post_with_session("/api/v1/themes", &body, session)
        .await;
    assert_eq!(status.as_u16(), 201, "Theme creation should succeed");
    resp["id"].as_str().unwrap().to_string()
}

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

#[tokio::test]
async fn get_sources_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/sources", "invalid-session-token").await;

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

#[tokio::test]
async fn post_sources_without_auth_returns_401() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let body = serde_json::json!({
        "title": "My Blog",
        "url": "https://example.com"
    });
    let (status, resp) = app.post("/api/v1/sources", &body).await;

    assert_eq!(
        status,
        StatusCode::UNAUTHORIZED,
        "POST /sources without auth should return 401"
    );
    assert_eq!(resp["error"], "unauthorized");
}

#[tokio::test]
async fn delete_source_without_auth_returns_401() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let fake_id = uuid::Uuid::new_v4();

    // Build a DELETE request without session
    let req = Request::builder()
        .method(Method::DELETE)
        .uri(format!("/api/v1/sources/{}", fake_id))
        .header("X-Requested-With", "XMLHttpRequest")
        .body(Body::empty())
        .unwrap();

    let response = app.raw_request(req).await;
    assert_eq!(
        response.status(),
        StatusCode::UNAUTHORIZED,
        "DELETE /sources/:id without auth should return 401"
    );
}

// ═══════════════════════════════════════════════════════════════════════════
// CRUD — Basic operations
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn get_sources_empty_list() {
    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("sources-empty@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let (status, body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;

    assert_eq!(status, StatusCode::OK, "GET /sources should return 200");
    let sources = body.as_array().expect("Response should be an array");
    assert!(sources.is_empty(), "New user should have no sources");
}

#[tokio::test]
async fn create_source_with_valid_data_returns_201() {
    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("sources-create@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "My Blog",
        "url": "https://blog.example.com",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::CREATED,
        "POST /sources with valid data should return 201"
    );
    assert_eq!(resp["title"], "My Blog");
    assert_eq!(resp["url"], "https://blog.example.com");
    assert!(
        resp["id"].as_str().is_some(),
        "Response should contain an id"
    );
    assert!(
        resp["created_at"].as_str().is_some(),
        "Response should contain created_at"
    );
}

#[tokio::test]
async fn create_source_then_list_shows_it() {
    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("sources-create-list@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Create a source
    let body = serde_json::json!({
        "title": "Tech News",
        "url": "https://technews.example.com",
        "theme_id": theme_id
    });
    let (create_status, create_resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;
    assert_eq!(create_status, StatusCode::CREATED);
    let created_id = create_resp["id"].as_str().unwrap();

    // List sources
    let (list_status, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    assert_eq!(list_status, StatusCode::OK);

    let sources = list_body.as_array().expect("Should be an array");
    assert_eq!(sources.len(), 1, "Should have exactly one source");
    assert_eq!(sources[0]["id"], created_id);
    assert_eq!(sources[0]["title"], "Tech News");
    assert_eq!(sources[0]["url"], "https://technews.example.com");
}

#[tokio::test]
async fn create_multiple_sources_list_returns_all() {
    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("sources-multi@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Create three sources
    for i in 1..=3 {
        let body = serde_json::json!({
            "title": format!("Source {}", i),
            "url": format!("https://source{}.example.com", i),
            "theme_id": theme_id
        });
        let (status, _) = app
            .post_with_session("/api/v1/sources", &body, &session)
            .await;
        assert_eq!(status, StatusCode::CREATED);
    }

    // List should have 3 sources
    let (status, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    assert_eq!(status, StatusCode::OK);

    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 3, "Should have exactly 3 sources");
}

// ═══════════════════════════════════════════════════════════════════════════
// CRUD — Validation errors
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn create_source_invalid_url_returns_422() {
    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("sources-invalid-url@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "My Blog",
        "url": "not-a-valid-url",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "Invalid URL should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

#[tokio::test]
async fn create_source_ftp_url_returns_422() {
    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("sources-ftp-url@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "FTP Source",
        "url": "ftp://files.example.com",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "FTP URL should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

#[tokio::test]
async fn create_source_empty_title_returns_422() {
    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("sources-empty-title@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "   ",
        "url": "https://example.com",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "Empty title should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

#[tokio::test]
async fn create_source_title_too_long_returns_422() {
    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("sources-title-long@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let long_title = "a".repeat(201);
    let body = serde_json::json!({
        "title": long_title,
        "url": "https://example.com",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "Title >200 chars should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

#[tokio::test]
async fn create_source_url_too_long_returns_422() {
    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("sources-url-long@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let long_url = format!("https://example.com/{}", "a".repeat(990));
    assert!(long_url.len() > 1000);
    let body = serde_json::json!({
        "title": "My Blog",
        "url": long_url,
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "URL >1000 chars should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

#[tokio::test]
async fn create_source_empty_url_returns_422() {
    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("sources-empty-url@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "My Blog",
        "url": "",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "Empty URL should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

// ═══════════════════════════════════════════════════════════════════════════
// CRUD — Duplicate URL handling
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn create_source_duplicate_url_returns_error() {
    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("sources-dup@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "My Blog",
        "url": "https://duplicate.example.com",
        "theme_id": theme_id
    });

    // First creation should succeed
    let (status1, _) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;
    assert_eq!(status1, StatusCode::CREATED);

    // Second creation with same URL should fail (DB unique constraint)
    let body2 = serde_json::json!({
        "title": "Different Title",
        "url": "https://duplicate.example.com",
        "theme_id": theme_id
    });
    let (status2, _) = app
        .post_with_session("/api/v1/sources", &body2, &session)
        .await;

    // The DB has a unique constraint on (user_id, url), so this should return
    // an error (500 from DB constraint or could be handled as 409 Conflict).
    // Since the handler doesn't explicitly check for duplicates before insert,
    // it will hit the DB constraint, which maps to an internal error.
    assert!(
        status2 == StatusCode::INTERNAL_SERVER_ERROR
            || status2 == StatusCode::CONFLICT
            || status2 == StatusCode::UNPROCESSABLE_ENTITY,
        "Duplicate URL should return an error status, got {}",
        status2
    );
}

// ═══════════════════════════════════════════════════════════════════════════
// CRUD — Delete
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn delete_source_valid_id_returns_204() {
    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("sources-delete@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Create a source
    let body = serde_json::json!({
        "title": "To Delete",
        "url": "https://delete.example.com",
        "theme_id": theme_id
    });
    let (create_status, create_resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;
    assert_eq!(create_status, StatusCode::CREATED);
    let source_id = create_resp["id"].as_str().unwrap();

    // Delete it
    let (del_status, _) = app
        .delete_with_session(&format!("/api/v1/sources/{}", source_id), &session)
        .await;
    assert_eq!(
        del_status,
        StatusCode::NO_CONTENT,
        "DELETE should return 204"
    );
}

#[tokio::test]
async fn delete_source_then_list_no_longer_shows_it() {
    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("sources-delete-list@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Create two sources
    let body1 = serde_json::json!({
        "title": "Keep This",
        "url": "https://keep.example.com",
        "theme_id": theme_id
    });
    let (_, resp1) = app
        .post_with_session("/api/v1/sources", &body1, &session)
        .await;
    let keep_id = resp1["id"].as_str().unwrap().to_string();

    let body2 = serde_json::json!({
        "title": "Delete This",
        "url": "https://delete-me.example.com",
        "theme_id": theme_id
    });
    let (_, resp2) = app
        .post_with_session("/api/v1/sources", &body2, &session)
        .await;
    let delete_id = resp2["id"].as_str().unwrap();

    // Delete the second one
    let (del_status, _) = app
        .delete_with_session(&format!("/api/v1/sources/{}", delete_id), &session)
        .await;
    assert_eq!(del_status, StatusCode::NO_CONTENT);

    // List should only show the first source
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 1, "Should have exactly 1 source after delete");
    assert_eq!(sources[0]["id"], keep_id);
}

#[tokio::test]
async fn delete_source_nonexistent_id_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("sources-delete-404@example.com")
        .await;

    let fake_id = uuid::Uuid::new_v4();
    let (status, body) = app
        .delete_with_session(&format!("/api/v1/sources/{}", fake_id), &session)
        .await;

    assert_eq!(
        status,
        StatusCode::NOT_FOUND,
        "DELETE with non-existent id should return 404"
    );
    assert_eq!(body["error"], "not_found");
}

// ═══════════════════════════════════════════════════════════════════════════
// Ownership Isolation
// ═══════════════════════════════════════════════════════════════════════════

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

    let app = common::TestApp::new().await;

    let (_user_a_id, session_a) = app
        .create_authenticated_user("user-a-sources@example.com")
        .await;
    let (_user_b_id, session_b) = app
        .create_authenticated_user("user-b-sources@example.com")
        .await;
    let theme_id_a = create_theme(&app, &session_a).await;
    let theme_id_b = create_theme(&app, &session_b).await;

    // User A creates a source
    let body = serde_json::json!({
        "title": "User A Blog",
        "url": "https://usera.example.com",
        "theme_id": theme_id_a
    });
    let (status, _) = app
        .post_with_session("/api/v1/sources", &body, &session_a)
        .await;
    assert_eq!(status, StatusCode::CREATED);

    // User B lists sources -> should be empty
    let (list_status, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id_b), &session_b)
        .await;
    assert_eq!(list_status, StatusCode::OK);
    let sources = list_body.as_array().unwrap();
    assert!(
        sources.is_empty(),
        "User B should NOT see User A's sources"
    );

    // User A lists sources -> should see their source
    let (_, list_body_a) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id_a), &session_a)
        .await;
    let sources_a = list_body_a.as_array().unwrap();
    assert_eq!(sources_a.len(), 1, "User A should see their own source");
}

#[tokio::test]
async fn user_b_cannot_delete_user_a_source_returns_404() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;

    let (_user_a_id, session_a) = app
        .create_authenticated_user("owner-a@example.com")
        .await;
    let (_user_b_id, session_b) = app
        .create_authenticated_user("attacker-b@example.com")
        .await;
    let theme_id_a = create_theme(&app, &session_a).await;

    // User A creates a source
    let body = serde_json::json!({
        "title": "User A Private",
        "url": "https://private-a.example.com",
        "theme_id": theme_id_a
    });
    let (_, create_resp) = app
        .post_with_session("/api/v1/sources", &body, &session_a)
        .await;
    let source_id = create_resp["id"].as_str().unwrap();

    // User B tries to delete it -> should get 404 (NOT 403, to avoid info leakage)
    let (del_status, del_body) = app
        .delete_with_session(&format!("/api/v1/sources/{}", source_id), &session_b)
        .await;

    assert_eq!(
        del_status,
        StatusCode::NOT_FOUND,
        "Deleting another user's source should return 404, not 403"
    );
    assert_eq!(del_body["error"], "not_found");

    // Verify User A's source is still there
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id_a), &session_a)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(
        sources.len(),
        1,
        "User A's source should NOT have been deleted"
    );
}

// ═══════════════════════════════════════════════════════════════════════════
// Bulk Import
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn bulk_import_valid_sources_succeeds() {
    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("bulk-import@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "sources": [
            { "title": "Blog 1", "url": "https://blog1.example.com" },
            { "title": "Blog 2", "url": "https://blog2.example.com" },
            { "title": "Blog 3", "url": "https://blog3.example.com" }
        ],
        "theme_id": theme_id
    });

    let (status, resp) = app
        .post_with_session("/api/v1/sources/bulk", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::OK,
        "Bulk import should return 200"
    );
    assert_eq!(resp["imported"], 3, "Should have imported 3 sources");
    assert_eq!(resp["skipped"], 0, "Should have skipped 0 sources");

    // Verify they appear in the list
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 3);
}

#[tokio::test]
async fn bulk_import_with_duplicates_skips_them() {
    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("bulk-dup@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // First, create one source normally
    let body = serde_json::json!({
        "title": "Existing",
        "url": "https://existing.example.com",
        "theme_id": theme_id
    });
    let (status, _) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;
    assert_eq!(status, StatusCode::CREATED);

    // Now bulk import with the same URL + a new one
    let bulk = serde_json::json!({
        "sources": [
            { "title": "Existing Dup", "url": "https://existing.example.com" },
            { "title": "New One", "url": "https://new.example.com" }
        ],
        "theme_id": theme_id
    });

    let (bulk_status, resp) = app
        .post_with_session("/api/v1/sources/bulk", &bulk, &session)
        .await;

    assert_eq!(bulk_status, StatusCode::OK);
    assert_eq!(
        resp["imported"], 1,
        "Only 1 new source should be imported"
    );
    assert_eq!(
        resp["skipped"], 1,
        "1 duplicate should be skipped"
    );

    // Total should be 2 (original + new)
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 2);
}

#[tokio::test]
async fn bulk_import_empty_array_returns_error() {
    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("bulk-empty@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "sources": [],
        "theme_id": theme_id
    });

    let (status, resp) = app
        .post_with_session("/api/v1/sources/bulk", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "Empty bulk import should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
}

#[tokio::test]
async fn bulk_import_with_invalid_entries_reports_errors() {
    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("bulk-invalid@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "sources": [
            { "title": "Valid", "url": "https://valid.example.com" },
            { "title": "", "url": "https://empty-title.example.com" },
            { "title": "Bad URL", "url": "not-a-url" },
            { "title": "Also Valid", "url": "https://alsovalid.example.com" }
        ],
        "theme_id": theme_id
    });

    let (status, resp) = app
        .post_with_session("/api/v1/sources/bulk", &body, &session)
        .await;

    assert_eq!(status, StatusCode::OK, "Bulk import should still return 200");
    assert_eq!(
        resp["imported"], 2,
        "Only the 2 valid sources should be imported"
    );
    let errors = resp["errors"].as_array().expect("errors should be an array");
    assert_eq!(
        errors.len(),
        2,
        "Should have 2 validation errors (empty title + invalid URL)"
    );

    // Verify only 2 sources exist
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 2);
}

#[tokio::test]
async fn bulk_import_without_auth_returns_401() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;
    let body = serde_json::json!({
        "sources": [
            { "title": "Blog", "url": "https://blog.example.com" }
        ]
    });

    let (status, resp) = app.post("/api/v1/sources/bulk", &body).await;

    assert_eq!(
        status,
        StatusCode::UNAUTHORIZED,
        "Bulk import without auth should return 401"
    );
    assert_eq!(resp["error"], "unauthorized");
}

// ═══════════════════════════════════════════════════════════════════════════
// CSV Export
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn export_csv_with_sources_returns_csv() {
    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("csv-export@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Create some sources
    for i in 1..=2 {
        let body = serde_json::json!({
            "title": format!("Source {}", i),
            "url": format!("https://source{}.example.com", i),
            "theme_id": theme_id
        });
        let (s, _) = app
            .post_with_session("/api/v1/sources", &body, &session)
            .await;
        assert_eq!(s, StatusCode::CREATED);
    }

    // Export CSV
    let req = Request::builder()
        .method(Method::GET)
        .uri(format!("/api/v1/sources/export-csv?theme_id={}", theme_id))
        .header(
            "Cookie",
            format!("ai_synth_session={}", session),
        )
        .body(Body::empty())
        .unwrap();

    let (status, text, headers) = app.raw_request_text(req).await;

    assert_eq!(status, StatusCode::OK, "CSV export should return 200");

    // Check Content-Type
    let content_type = headers
        .get("content-type")
        .map(|v| v.to_str().unwrap_or(""))
        .unwrap_or("");
    assert!(
        content_type.contains("text/csv"),
        "Content-Type should be text/csv, got: {}",
        content_type
    );

    // Check Content-Disposition
    let disposition = headers
        .get("content-disposition")
        .map(|v| v.to_str().unwrap_or(""))
        .unwrap_or("");
    assert!(
        disposition.contains("attachment"),
        "Content-Disposition should indicate attachment, got: {}",
        disposition
    );

    // Check CSV content
    let lines: Vec<&str> = text.lines().collect();
    assert!(lines.len() >= 3, "CSV should have header + 2 data rows");
    assert_eq!(lines[0], "title,url", "First line should be the header");
    // Data rows — order is newest-first
    assert!(
        text.contains("Source 1") && text.contains("Source 2"),
        "CSV should contain both sources"
    );
    assert!(
        text.contains("https://source1.example.com")
            && text.contains("https://source2.example.com"),
        "CSV should contain both URLs"
    );
}

#[tokio::test]
async fn export_csv_with_no_sources_returns_header_only() {
    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("csv-export-empty@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let req = Request::builder()
        .method(Method::GET)
        .uri(format!("/api/v1/sources/export-csv?theme_id={}", theme_id))
        .header(
            "Cookie",
            format!("ai_synth_session={}", session),
        )
        .body(Body::empty())
        .unwrap();

    let (status, text, _) = app.raw_request_text(req).await;

    assert_eq!(status, StatusCode::OK);
    let lines: Vec<&str> = text.lines().collect();
    assert_eq!(lines.len(), 1, "Should have only the header row");
    assert_eq!(lines[0], "title,url");
}

#[tokio::test]
async fn export_csv_without_auth_returns_401() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;

    let req = Request::builder()
        .method(Method::GET)
        .uri("/api/v1/sources/export-csv")
        .body(Body::empty())
        .unwrap();

    let response = app.raw_request(req).await;
    assert_eq!(
        response.status(),
        StatusCode::UNAUTHORIZED,
        "CSV export without auth should return 401"
    );
}

// ═══════════════════════════════════════════════════════════════════════════
// CSV Import
// ═══════════════════════════════════════════════════════════════════════════

/// Helper to build a multipart request body for CSV import.
fn build_csv_multipart_request(
    csv_content: &str,
    session_cookie: &str,
    theme_id: &str,
) -> Request<Body> {
    let boundary = "----TestBoundary12345";
    let body = format!(
        "--{boundary}\r\n\
         Content-Disposition: form-data; name=\"file\"; filename=\"sources.csv\"\r\n\
         Content-Type: text/csv\r\n\
         \r\n\
         {csv_content}\r\n\
         --{boundary}--\r\n",
        boundary = boundary,
        csv_content = csv_content
    );

    Request::builder()
        .method(Method::POST)
        .uri(format!("/api/v1/sources/import-csv?theme_id={}", theme_id))
        .header(
            "Content-Type",
            format!("multipart/form-data; boundary={}", boundary),
        )
        .header("X-Requested-With", "XMLHttpRequest")
        .header(
            "Cookie",
            format!("ai_synth_session={}", session_cookie),
        )
        .body(Body::from(body))
        .unwrap()
}

#[tokio::test]
async fn import_csv_with_valid_data_succeeds() {
    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("csv-import@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let csv_content = "title,url\nBlog One,https://blog1.example.com\nBlog Two,https://blog2.example.com";
    let req = build_csv_multipart_request(csv_content, &session, &theme_id);

    let response = app.raw_request(req).await;
    let status = response.status();

    assert_eq!(status, StatusCode::OK, "CSV import should return 200");

    // Parse the response body
    let bytes = http_body_util::BodyExt::collect(response.into_body())
        .await
        .unwrap()
        .to_bytes();
    let resp: serde_json::Value = serde_json::from_slice(&bytes).unwrap();

    assert_eq!(resp["imported"], 2, "Should have imported 2 sources");
    assert_eq!(resp["skipped"], 0);

    // Verify via list
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 2);
}

#[tokio::test]
async fn import_csv_semicolon_separated_succeeds() {
    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("csv-semicolon@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let csv_content = "titre;lien\nMon Blog;https://monblog.example.com\nActus;https://actus.example.com";
    let req = build_csv_multipart_request(csv_content, &session, &theme_id);

    let response = app.raw_request(req).await;
    let status = response.status();

    assert_eq!(
        status,
        StatusCode::OK,
        "CSV import with semicolons should return 200"
    );

    let bytes = http_body_util::BodyExt::collect(response.into_body())
        .await
        .unwrap()
        .to_bytes();
    let resp: serde_json::Value = serde_json::from_slice(&bytes).unwrap();

    assert_eq!(
        resp["imported"], 2,
        "Should import 2 sources from semicolon-separated CSV"
    );

    // Verify the actual titles
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 2);
    let titles: Vec<&str> = sources
        .iter()
        .map(|s| s["title"].as_str().unwrap())
        .collect();
    assert!(titles.contains(&"Mon Blog"));
    assert!(titles.contains(&"Actus"));
}

#[tokio::test]
async fn import_csv_without_auth_returns_401() {
    if !require_test_db() {
        eprintln!("SKIPPED: TEST_DATABASE_URL not set");
        return;
    }

    let app = common::TestApp::new().await;

    let boundary = "----TestBoundary12345";
    let body_str = format!(
        "--{boundary}\r\n\
         Content-Disposition: form-data; name=\"file\"; filename=\"sources.csv\"\r\n\
         Content-Type: text/csv\r\n\
         \r\n\
         title,url\nBlog,https://example.com\r\n\
         --{boundary}--\r\n",
        boundary = boundary
    );

    let req = Request::builder()
        .method(Method::POST)
        .uri("/api/v1/sources/import-csv")
        .header(
            "Content-Type",
            format!("multipart/form-data; boundary={}", boundary),
        )
        .header("X-Requested-With", "XMLHttpRequest")
        .body(Body::from(body_str))
        .unwrap();

    let response = app.raw_request(req).await;
    assert_eq!(
        response.status(),
        StatusCode::UNAUTHORIZED,
        "CSV import without auth should return 401"
    );
}

// ═══════════════════════════════════════════════════════════════════════════
// CSV Roundtrip: create sources -> export -> verify content
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn csv_export_roundtrip() {
    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("csv-roundtrip@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Create sources
    let source_data = vec![
        ("Rust Blog", "https://rust-blog.example.com"),
        ("AI News", "https://ainews.example.com"),
        ("Tech Crunch", "https://techcrunch.example.com"),
    ];

    for (title, url) in &source_data {
        let body = serde_json::json!({ "title": title, "url": url, "theme_id": theme_id });
        let (s, _) = app
            .post_with_session("/api/v1/sources", &body, &session)
            .await;
        assert_eq!(s, StatusCode::CREATED);
    }

    // Export CSV
    let req = Request::builder()
        .method(Method::GET)
        .uri(format!("/api/v1/sources/export-csv?theme_id={}", theme_id))
        .header("Cookie", format!("ai_synth_session={}", session))
        .body(Body::empty())
        .unwrap();

    let (status, csv_text, _) = app.raw_request_text(req).await;
    assert_eq!(status, StatusCode::OK);

    // Verify CSV has a header and 3 data rows
    let lines: Vec<&str> = csv_text.lines().collect();
    assert_eq!(lines[0], "title,url");
    // There should be 3 data rows (newest first, but we don't care about order here)
    assert_eq!(
        lines.len() - 1, // subtract header
        3,
        "Should have 3 data rows"
    );

    // Verify all sources are present
    for (title, url) in &source_data {
        assert!(
            csv_text.contains(title),
            "CSV should contain title '{}'",
            title
        );
        assert!(
            csv_text.contains(url),
            "CSV should contain URL '{}'",
            url
        );
    }
}

// ═══════════════════════════════════════════════════════════════════════════
// Max Sources Limit
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn max_sources_limit_enforced() {
    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("max-sources@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;
    let theme_uuid: uuid::Uuid = theme_id.parse().unwrap();

    // Insert 100 sources directly into the database (faster than 100 API calls)
    for i in 0..100 {
        sqlx::query(
            "INSERT INTO sources (user_id, title, url, theme_id) VALUES ($1, $2, $3, $4)",
        )
        .bind(user_id)
        .bind(format!("Source {}", i))
        .bind(format!("https://source{}.example.com", i))
        .bind(theme_uuid)
        .execute(&app.pool)
        .await
        .expect("Failed to insert source");
    }

    // Verify we have 100
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 100, "Should have 100 sources");

    // Attempt to create the 101st source via API
    let body = serde_json::json!({
        "title": "One Too Many",
        "url": "https://toomany.example.com",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::UNPROCESSABLE_ENTITY,
        "Creating more than 100 sources should return 422"
    );
    assert_eq!(resp["error"], "validation_error");
    assert!(
        resp["message"]
            .as_str()
            .unwrap_or("")
            .contains("100"),
        "Error message should mention the limit"
    );
}

#[tokio::test]
async fn bulk_import_respects_max_sources_limit() {
    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("bulk-max@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;
    let theme_uuid: uuid::Uuid = theme_id.parse().unwrap();

    // Insert 98 sources directly
    for i in 0..98 {
        sqlx::query(
            "INSERT INTO sources (user_id, title, url, theme_id) VALUES ($1, $2, $3, $4)",
        )
        .bind(user_id)
        .bind(format!("Source {}", i))
        .bind(format!("https://source{}.example.com", i))
        .bind(theme_uuid)
        .execute(&app.pool)
        .await
        .expect("Failed to insert source");
    }

    // Bulk import 5 sources (but only 2 slots remaining)
    let sources: Vec<serde_json::Value> = (0..5)
        .map(|i| {
            serde_json::json!({
                "title": format!("Bulk {}", i),
                "url": format!("https://bulk{}.example.com", i)
            })
        })
        .collect();

    let body = serde_json::json!({ "sources": sources, "theme_id": theme_id });
    let (status, resp) = app
        .post_with_session("/api/v1/sources/bulk", &body, &session)
        .await;

    assert_eq!(status, StatusCode::OK);
    assert_eq!(
        resp["imported"], 2,
        "Only 2 should be imported (remaining capacity)"
    );

    let errors = resp["errors"].as_array().unwrap();
    assert!(
        !errors.is_empty(),
        "Should report that limit was reached"
    );

    // Verify total is exactly 100
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let all_sources = list_body.as_array().unwrap();
    assert_eq!(all_sources.len(), 100, "Should have exactly 100 sources");
}

// ═══════════════════════════════════════════════════════════════════════════
// Boundary / Edge Cases
// ═══════════════════════════════════════════════════════════════════════════

#[tokio::test]
async fn create_source_with_boundary_values_succeeds() {
    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("sources-boundary@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Title exactly 200 chars
    let title_200 = "a".repeat(200);
    let body = serde_json::json!({
        "title": title_200,
        "url": "https://boundary-title.example.com",
        "theme_id": theme_id
    });
    let (status, _) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;
    assert_eq!(
        status,
        StatusCode::CREATED,
        "Title of exactly 200 chars should be accepted"
    );

    // URL exactly 1000 chars
    let url_1000 = format!("https://example.com/{}", "b".repeat(980));
    assert_eq!(url_1000.len(), 1000);
    let body2 = serde_json::json!({
        "title": "Boundary URL",
        "url": url_1000,
        "theme_id": theme_id
    });
    let (status2, _) = app
        .post_with_session("/api/v1/sources", &body2, &session)
        .await;
    assert_eq!(
        status2,
        StatusCode::CREATED,
        "URL of exactly 1000 chars should be accepted"
    );

    // Minimal valid source
    let body3 = serde_json::json!({
        "title": "A",
        "url": "http://x.co",
        "theme_id": theme_id
    });
    let (status3, _) = app
        .post_with_session("/api/v1/sources", &body3, &session)
        .await;
    assert_eq!(
        status3,
        StatusCode::CREATED,
        "Minimal valid source should be accepted"
    );
}

#[tokio::test]
async fn create_source_with_http_url_succeeds() {
    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("sources-http@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    let body = serde_json::json!({
        "title": "HTTP Source",
        "url": "http://insecure.example.com",
        "theme_id": theme_id
    });
    let (status, resp) = app
        .post_with_session("/api/v1/sources", &body, &session)
        .await;

    assert_eq!(
        status,
        StatusCode::CREATED,
        "http:// URLs should be accepted"
    );
    assert_eq!(resp["url"], "http://insecure.example.com");
}

#[tokio::test]
async fn bulk_import_all_duplicates_within_batch() {
    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("bulk-inner-dup@example.com")
        .await;
    let theme_id = create_theme(&app, &session).await;

    // Same URL appearing twice in one batch
    let body = serde_json::json!({
        "sources": [
            { "title": "First", "url": "https://same.example.com" },
            { "title": "Second", "url": "https://same.example.com" }
        ],
        "theme_id": theme_id
    });

    let (status, resp) = app
        .post_with_session("/api/v1/sources/bulk", &body, &session)
        .await;

    assert_eq!(status, StatusCode::OK);
    // The ON CONFLICT DO NOTHING means the second insert is a no-op
    assert_eq!(resp["imported"], 1, "Only one should be imported");
    assert_eq!(resp["skipped"], 1, "The duplicate should be counted as skipped");

    // Verify only 1 source exists
    let (_, list_body) = app
        .get_with_session(&format!("/api/v1/sources?theme_id={}", theme_id), &session)
        .await;
    let sources = list_body.as_array().unwrap();
    assert_eq!(sources.len(), 1);
}