//! Rendezvous Shard Discovery Integration Tests
//!
//! Verifies rendezvous sharding for global agent findability across 65,536
//! content-addressed shards. Currently stubbed - awaiting Phase 1.3.
//!
//! **Status**: Awaiting Phase 1.3 (saorsa-gossip-rendezvous integration)

use std::time::Duration;
use tempfile::TempDir;
use tokio::time::sleep;
use x0x::{network::NetworkConfig, Agent};

/// VPS nodes
const VPS_NODES: &[&str] = &[
    "142.93.199.50:12000",
    "147.182.234.192:12000",
    "65.21.157.229:12000",
    "116.203.101.172:12000",
    "149.28.156.231:12000",
    "45.77.176.184:12000",
];

/// Test 1: Shard assignment determinism
///
/// Verifies that ShardId = BLAKE3("saorsa-rendezvous" || agent_id) & 0xFFFF
/// produces deterministic, collision-resistant shard assignments.
#[test]
#[ignore = "requires Phase 1.3 (rendezvous sharding)"]
fn test_shard_assignment_deterministic() {
    // TODO: Implement once rendezvous module available
    // let agent_id = AgentId::random();
    // let shard1 = compute_shard_id(&agent_id);
    // let shard2 = compute_shard_id(&agent_id);
    // assert_eq!(shard1, shard2, "Shard assignment must be deterministic");
}

/// Test 2: Shard collision resistance
///
/// Verifies that 10,000 random agent IDs distribute across shards
/// with minimal collisions (uniform distribution).
#[test]
#[ignore = "requires Phase 1.3 (rendezvous sharding)"]
fn test_shard_collision_resistance() {
    // TODO: Generate 10,000 random agent IDs
    // TODO: Compute shard for each
    // TODO: Verify uniform distribution (chi-squared test)
    // Expected: < 5% deviation from uniform distribution
}

/// Test 3: Agent registration to correct shard coordinator
#[tokio::test]
#[ignore = "requires Phase 1.3 and VPS testnet"]
async fn test_agent_registers_to_shard() {
    let temp_dir = TempDir::new().unwrap();
    let bootstrap_addrs = VPS_NODES.iter().filter_map(|s| s.parse().ok()).collect();

    let agent = Agent::builder()
        .with_machine_key(temp_dir.path().join("machine.key"))
        .with_network_config(NetworkConfig {
            bind_addr: Some("0.0.0.0:0".parse().unwrap()),
            bootstrap_nodes: bootstrap_addrs,
            ..Default::default()
        })
        .build()
        .await
        .unwrap();

    agent.join_network().await.unwrap();
    sleep(Duration::from_secs(5)).await;

    // TODO: Verify agent registered to correct shard coordinator
    // let shard_id = compute_shard_id(&agent.agent_id());
    // let coordinator = agent.get_shard_coordinator(shard_id).await?;
    // assert!(coordinator.has_agent(&agent.agent_id()));
}

/// Test 4: Agent lookup via shard query
#[tokio::test]
#[ignore = "requires Phase 1.3 and VPS testnet"]
async fn test_agent_lookup_via_shard() {
    // TODO: Create 2 agents
    // TODO: Agent A queries shard for Agent B
    // Expected: Query returns Agent B's network address
    // Expected: Query latency < 1 second
}

/// Test 5: Coordinator advert propagation
#[tokio::test]
#[ignore = "requires Phase 1.3 and VPS testnet"]
async fn test_coordinator_advert_propagation() {
    // TODO: VPS nodes should advertise as coordinators
    // TODO: Verify ML-DSA signed adverts propagate globally
    // Expected: All 6 VPS nodes advertise as coordinators
    // Expected: Adverts have 24h TTL
    // Expected: Adverts propagate within 10 seconds
}

/// Test 6: Coordinator failover
#[tokio::test]
#[ignore = "requires Phase 1.3 and VPS testnet with coordinator shutdown"]
async fn test_coordinator_failover() {
    // TODO: Identify primary coordinator for a shard
    // TODO: Simulate coordinator going offline
    // TODO: Verify backup coordinator takes over
    // Expected: Failover within 30 seconds
    // Expected: No data loss during failover
}

/// Test 7: Shard load balancing
#[test]
#[ignore = "requires Phase 1.3 (shard statistics)"]
fn test_shard_load_balancing() {
    // TODO: Generate 100,000 agent IDs
    // TODO: Compute shard distribution
    // TODO: Verify load is balanced across 65,536 shards
    // Expected: Standard deviation < 10% of mean
    // Expected: No shard has > 2x the mean load
}

/// Test 8: Concurrent shard queries
#[tokio::test]
#[ignore = "requires Phase 1.3 and VPS testnet"]
async fn test_concurrent_shard_queries() {
    // TODO: Launch 100 concurrent shard queries
    // TODO: Verify all queries succeed
    // Expected: No query timeouts
    // Expected: Mean latency < 500ms
    // Expected: p99 latency < 2s
}
