communitas-core 0.1.21

//! Bootstrap Discovery Tests
//!
//! Tests bootstrap node discovery, cold start scenarios,
//! bootstrap.toml reading/writing, and fallback behavior.

use communitas_core::test_harness::TestHarness;
use std::time::Duration;

// ============================================================================
// Bootstrap Configuration Tests
// ============================================================================

#[tokio::test]
#[ignore] // Requires core_get_bootstrap_nodes implementation
async fn test_read_write_bootstrap_nodes() {
    // GIVEN: Test harness with 3 nodes
    let harness = TestHarness::new(3).await.expect("harness creation failed");

    // WHEN: Get bootstrap addresses
    let addrs = harness.get_bootstrap_addrs().await;
    assert_eq!(addrs.len(), 3, "Should have 3 bootstrap addresses");

    // TODO: Write bootstrap addresses to file via core_update_bootstrap_nodes
    // TODO: Read back via core_get_bootstrap_nodes
    // TODO: Verify addresses match

    harness.cleanup().await.expect("cleanup failed");
}

#[tokio::test]
#[ignore] // Requires bootstrap implementation
async fn test_bootstrap_connection() {
    // GIVEN: 1 bootstrap node and 2 regular nodes
    let harness = TestHarness::new(3).await.expect("harness creation failed");

    // Node 0 is bootstrap
    let _bootstrap_addrs = [harness
        .get_node(0)
        .await
        .expect("node 0 not found")
        .read()
        .await
        .bootstrap_addr()];

    // WHEN: Nodes 1 and 2 connect via bootstrap
    // TODO: Configure nodes 1 and 2 to use bootstrap_addrs
    // TODO: Initiate connection

    // THEN: All nodes should be connected
    harness
        .wait_until_connected(3, Duration::from_secs(10))
        .await
        .expect("bootstrap connection failed");

    harness.cleanup().await.expect("cleanup failed");
}

#[tokio::test]
#[ignore] // Requires bootstrap implementation
async fn test_multiple_bootstrap_nodes() {
    // GIVEN: 2 bootstrap nodes, 2 regular nodes
    let harness = TestHarness::new(4).await.expect("harness creation failed");

    // Nodes 0 and 1 are bootstraps
    let bootstrap_addrs = harness.get_bootstrap_addrs().await;
    let _bootstrap_list = [bootstrap_addrs[0].clone(), bootstrap_addrs[1].clone()];

    // WHEN: One bootstrap fails
    harness
        .partition(&[0], &[2, 3])
        .await
        .expect("partition failed");

    // TODO: Configure nodes 2 and 3 with both bootstrap addresses
    // TODO: Initiate connection

    // THEN: Nodes should connect via second bootstrap
    tokio::time::sleep(Duration::from_secs(2)).await;

    {
        let network = harness.network.read().await;
        assert!(
            network.are_connected(1, 2).await,
            "Should connect via backup bootstrap"
        );
        assert!(
            network.are_connected(1, 3).await,
            "Should connect via backup bootstrap"
        );
    } // network guard dropped here

    harness.cleanup().await.expect("cleanup failed");
}

#[tokio::test]
#[ignore] // Requires bootstrap implementation
async fn test_bootstrap_fallback_unreachable() {
    // GIVEN: Bootstrap address that doesn't respond
    let harness = TestHarness::new(1).await.expect("harness creation failed");

    let _bad_bootstrap = ["192.0.2.1:9000".to_string()]; // TEST-NET address

    // WHEN: Node tries to connect with unreachable bootstrap
    // TODO: Configure node with bad_bootstrap
    // TODO: Attempt connection with timeout

    // THEN: Should return empty peer list, not error (graceful degradation)
    // TODO: Verify no panic, no error, empty result

    harness.cleanup().await.expect("cleanup failed");
}

#[tokio::test]
#[ignore] // Requires bootstrap implementation
async fn test_bootstrap_timeout() {
    // GIVEN: Bootstrap that doesn't respond within timeout
    let harness = TestHarness::new(2).await.expect("harness creation failed");

    // Set very high latency to simulate timeout
    harness.set_latency(0, 1, 10000).await; // 10 seconds

    // WHEN: Node tries to connect with 1 second timeout
    let start = std::time::Instant::now();
    // TODO: Initiate connection with 1 second timeout
    let _elapsed = start.elapsed();

    // THEN: Should timeout gracefully within ~1 second
    // TODO: assert!(elapsed.as_secs() <= 2);

    harness.cleanup().await.expect("cleanup failed");
}

// ============================================================================
// Cold Start Scenarios
// ============================================================================

#[tokio::test]
#[ignore] // Requires full bootstrap flow
async fn test_cold_start_empty_cache() {
    // GIVEN: New node with no cached peers
    let harness = TestHarness::new(1).await.expect("harness creation failed");

    // WHEN: Node starts with introducer config
    // TODO: Configure introducer addresses
    // TODO: cold_start_discovery()

    // THEN: Should discover peers from introducer
    // TODO: Verify peer discovery

    harness.cleanup().await.expect("cleanup failed");
}

#[tokio::test]
#[ignore] // Requires bootstrap implementation
async fn test_empty_bootstrap_config() {
    // GIVEN: Node with empty bootstrap list
    let harness = TestHarness::new(1).await.expect("harness creation failed");

    let _empty_bootstrap: Vec<String> = vec![];

    // WHEN: Node attempts discovery with empty config
    // TODO: Configure with empty_bootstrap
    // TODO: Attempt cold start

    // THEN: Should return empty list, not error
    // TODO: Verify graceful handling

    harness.cleanup().await.expect("cleanup failed");
}

// ============================================================================
// IPv4 First Resolution
// ============================================================================

#[tokio::test]
#[ignore] // Requires address resolution implementation
async fn test_ipv4_preferred_over_ipv6() {
    // GIVEN: Bootstrap with both IPv4 and IPv6 addresses
    // TODO: Setup dual-stack address resolution

    // WHEN: Node resolves addresses
    // TODO: Call lookup_host

    // THEN: IPv4 should be ordered before IPv6
    // TODO: Verify ordering

    // Note: This is mentioned in AGENTS.md:
    // "QUIC/IPv4 first: addresses are resolved via `lookup_host`, ordering IPv4 before IPv6"
}