//! Integration tests for Phase 5 Network Engine, Route Management, and nftables ruleset builder.

use chrono::Utc;
use ipnet::IpNet;
use nx9_wg_core::types::firewall::{
    FirewallAction, FirewallDirection, FirewallProtocol, FirewallRule,
};
use nx9_wg_core::types::network::Route;
use nx9_wg_network::{NetworkEngine, NftablesRulesetBuilder, SimulatedNetworkEngine};
use std::net::IpAddr;
use std::str::FromStr;
use uuid::Uuid;

#[tokio::test]
async fn test_network_engine_routes_and_firewall_lifecycle() {
    let engine = SimulatedNetworkEngine::new();
    let now = Utc::now().naive_utc();

    // 1. Sync routes
    let r1 = Route {
        id: Uuid::new_v4(),
        network_id: None,
        interface_id: None,
        destination: IpNet::from_str("192.168.10.0/24").unwrap(),
        gateway: Some(IpAddr::from_str("10.0.0.1").unwrap()),
        interface_name: Some("wg0".to_string()),
        metric: Some(100),
        enabled: true,
        description: None,
        created_at: now,
        updated_at: now,
    };

    let r2 = Route {
        id: Uuid::new_v4(),
        network_id: None,
        interface_id: None,
        destination: IpNet::from_str("192.168.20.0/24").unwrap(),
        gateway: None,
        interface_name: Some("wg0".to_string()),
        metric: None,
        enabled: false, // disabled route should not be synchronized
        description: None,
        created_at: now,
        updated_at: now,
    };

    engine.sync_routes(&[r1, r2]).await.expect("sync routes");

    // 2. Sync firewall rules & NAT
    let fw1 = FirewallRule {
        id: Uuid::new_v4(),
        name: "Allow WireGuard Port".to_string(),
        interface_id: None,
        peer_id: None,
        direction: FirewallDirection::In,
        action: FirewallAction::Accept,
        protocol: FirewallProtocol::Udp,
        source: None,
        destination: None,
        source_port: None,
        destination_port: Some(51820),
        port_range: None,
        priority: 1,
        enabled: true,
        description: None,
        created_at: now,
        updated_at: now,
    };

    let subnets = vec![
        IpNet::from_str("10.0.0.0/24").unwrap(),
        IpNet::from_str("fd00::/64").unwrap(),
    ];

    engine
        .sync_firewall(&[fw1], true, &subnets)
        .await
        .expect("sync firewall");

    let ruleset = engine
        .get_active_nftables_ruleset()
        .await
        .expect("get ruleset");

    assert!(ruleset.contains("table inet nx9_wg"));
    assert!(ruleset.contains("udp dport 51820 accept"));
    assert!(ruleset.contains("ip saddr 10.0.0.0/24 oifname != \"wg*\" masquerade"));
    assert!(ruleset.contains("ip6 saddr fd00::/64 oifname != \"wg*\" masquerade"));

    // 3. IP Forwarding inspection
    let status = engine.get_forwarding_status().await.expect("forwarding");
    assert!(status.ipv4_enabled);
}

#[test]
fn test_nftables_builder_ordering_and_rules() {
    let now = Utc::now().naive_utc();

    let r_prio10 = FirewallRule {
        id: Uuid::new_v4(),
        name: "Low Priority Accept".to_string(),
        interface_id: None,
        peer_id: None,
        direction: FirewallDirection::In,
        action: FirewallAction::Accept,
        protocol: FirewallProtocol::Tcp,
        source: None,
        destination: None,
        source_port: None,
        destination_port: Some(80),
        port_range: None,
        priority: 10,
        enabled: true,
        description: None,
        created_at: now,
        updated_at: now,
    };

    let r_prio1 = FirewallRule {
        id: Uuid::new_v4(),
        name: "High Priority Drop".to_string(),
        interface_id: None,
        peer_id: None,
        direction: FirewallDirection::In,
        action: FirewallAction::Drop,
        protocol: FirewallProtocol::Tcp,
        source: Some("1.2.3.4".to_string()),
        destination: None,
        source_port: None,
        destination_port: Some(80),
        port_range: None,
        priority: 1,
        enabled: true,
        description: None,
        created_at: now,
        updated_at: now,
    };

    let subnets = vec![IpNet::from_str("10.0.0.0/24").unwrap()];
    let ruleset = NftablesRulesetBuilder::build(&[r_prio10, r_prio1], false, &subnets);

    // High priority drop (priority 1) must appear before low priority accept (priority 10)
    let drop_idx = ruleset.find("1.2.3.4").expect("drop rule");
    let accept_idx = ruleset.find("dport 80 accept").expect("accept rule");
    assert!(
        drop_idx < accept_idx,
        "Higher priority rule (1) must appear before lower priority rule (10)"
    );
}