//! Comprehensive Integration test suite for Interface Lifecycle Hardening:
//! - Interface deletion converges desired state and kernel state
//! - wg0 protection (deletion and disabling rejected via API & CLI)
//! - Reconciliation orphan detection and cleanup
//! - Desired-state read failure safety guard
//! - Interface restart lifecycle
//! - SPA Read-Only CLI Console allowlist and safety

use axum::body::{Body, to_bytes};
use axum::http::{Request, StatusCode, header};
use chrono::Utc;
use nx9_wg_api::auth::{BootstrapOptions, bootstrap_admin};
use nx9_wg_api::reconciliation::ReconciliationEngine;
use nx9_wg_api::routes::build_api_router;
use nx9_wg_api::routes::cli::{ExecuteCliRequest, build_safe_argv, scrub_secrets};
use nx9_wg_api::state::AppState;
use nx9_wg_core::config::AppConfig;
use nx9_wg_core::crypto::generate_keypair;
use nx9_wg_core::types::wireguard::{
    Interface, InterfaceRole, Peer, PeerProfile, PeerState, PeerType,
};
use nx9_wg_core::validation::validate_cidr;
use nx9_wg_db::Store;
use nx9_wg_network::SimulatedNetworkEngine;
use nx9_wireguard::{LiveInterfaceStats, SimulatedWireGuardEngine, WireGuardEngine};
use serde_json::{Value, json};
use std::collections::HashMap;
use std::sync::Arc;
use tempfile::{TempDir, tempdir};
use tower::ServiceExt;
use uuid::Uuid;

async fn setup_test_context() -> (
    TempDir,
    Store,
    AppState,
    Arc<SimulatedWireGuardEngine>,
    Arc<SimulatedNetworkEngine>,
    ReconciliationEngine,
    axum::Router,
    String,
) {
    let dir = tempdir().expect("create temp dir");
    let db_path = dir.path().join("lifecycle_test.db");
    let store = Store::connect(&db_path.to_string_lossy())
        .await
        .expect("connect to db");
    store.migrate().await.expect("run migrations");

    let config = AppConfig::default();
    let opts = BootstrapOptions {
        cli_password: Some("AdminSecret123!".to_string()),
        ..Default::default()
    };
    bootstrap_admin(&store, &config, &opts)
        .await
        .expect("bootstrap");

    let wg_engine = Arc::new(SimulatedWireGuardEngine::new());
    let net_engine = Arc::new(SimulatedNetworkEngine::new());
    let state = AppState::with_engines(store.clone(), wg_engine.clone(), net_engine.clone());
    let reconciler =
        ReconciliationEngine::new(state.clone(), wg_engine.clone(), net_engine.clone());
    let app = build_api_router(state.clone());

    // Login to get session ID
    let login_req = Request::builder()
        .method("POST")
        .uri("/api/v1/auth/login")
        .header(header::CONTENT_TYPE, "application/json")
        .body(Body::from(
            json!({
                "username": "admin",
                "password": "AdminSecret123!"
            })
            .to_string(),
        ))
        .unwrap();

    let resp = app.clone().oneshot(login_req).await.expect("login request");
    assert_eq!(resp.status(), StatusCode::OK);

    let cookie_header = resp
        .headers()
        .get(header::SET_COOKIE)
        .expect("set-cookie")
        .to_str()
        .unwrap();
    let session_cookie = cookie_header.split(';').next().unwrap().to_string();

    (
        dir,
        store,
        state,
        wg_engine,
        net_engine,
        reconciler,
        app,
        session_cookie,
    )
}

fn fixture_interface(name: &str, v4_cidr: &str) -> Interface {
    let (priv_k, pub_k) = generate_keypair();
    let now = Utc::now().naive_utc();
    Interface {
        id: Uuid::new_v4(),
        name: name.to_string(),
        role: InterfaceRole::Overlay,
        private_key: priv_k,
        public_key: pub_k,
        listen_port: Some(51820),
        address_v4: validate_cidr(v4_cidr).unwrap(),
        address_v6: None,
        mtu: Some(1420),
        dns: Some("1.1.1.1".to_string()),
        enabled: true,
        pre_up: None,
        post_up: None,
        pre_down: None,
        post_down: None,
        created_at: now,
        updated_at: now,
    }
}

fn fixture_peer(iface_id: Uuid, name: &str, v4_addr: &str) -> Peer {
    let (priv_k, pub_k) = generate_keypair();
    let now = Utc::now().naive_utc();
    Peer {
        id: Uuid::new_v4(),
        interface_id: iface_id,
        name: name.to_string(),
        public_key: pub_k,
        preshared_key: None,
        private_key: Some(priv_k),
        endpoint: None,
        address_v4: Some(validate_cidr(v4_addr).unwrap()),
        address_v6: None,
        allowed_ips: "0.0.0.0/0".to_string(),
        server_allowed_ips: None,
        dns: Some("1.1.1.1".to_string()),
        persistent_keepalive: Some(25),
        mtu: Some(1420),
        state: PeerState::Active,
        peer_type: PeerType::RoadWarrior,
        profile: PeerProfile::FullTunnel,
        last_handshake_at: None,
        expires_at: None,
        created_at: now,
        updated_at: now,
    }
}

#[tokio::test]
async fn test_interface_delete_removes_kernel_state() {
    let (_dir, store, _state, wg_engine, _net, _rec, app, cookie) = setup_test_context().await;

    // 1. Create desired interface
    let iface = fixture_interface("custom0", "10.200.0.1/24");
    store
        .create_interface(&iface)
        .await
        .expect("create interface");

    // 2. Sync to simulated kernel
    wg_engine.sync_interface(&iface, &[]).await.expect("sync");

    // 3. Verify kernel interface exists
    let live = wg_engine.list_interfaces().await.unwrap();
    assert!(live.contains(&"custom0".to_string()));

    // 4. Delete via API
    let req = Request::builder()
        .method("DELETE")
        .uri(format!("/api/v1/interfaces/{}", iface.id))
        .header(header::COOKIE, &cookie)
        .body(Body::empty())
        .unwrap();

    let resp = app.clone().oneshot(req).await.unwrap();
    assert_eq!(resp.status(), StatusCode::OK);

    // 5. Verify DB object removed
    let db_iface = store.get_interface(iface.id).await.unwrap();
    assert!(db_iface.is_none());

    // 6. Verify kernel interface removed
    let live_after = wg_engine.list_interfaces().await.unwrap();
    assert!(!live_after.contains(&"custom0".to_string()));
}

#[tokio::test]
async fn test_wg0_deletion_rejected() {
    let (_dir, store, _state, wg_engine, _net, _rec, app, cookie) = setup_test_context().await;

    // 1. Create wg0 interface
    let wg0 = fixture_interface("wg0", "10.100.0.1/24");
    store.create_interface(&wg0).await.expect("create wg0");
    wg_engine.sync_interface(&wg0, &[]).await.expect("sync wg0");

    // 2. Attempt deletion via API
    let req = Request::builder()
        .method("DELETE")
        .uri(format!("/api/v1/interfaces/{}", wg0.id))
        .header(header::COOKIE, &cookie)
        .body(Body::empty())
        .unwrap();

    let resp = app.clone().oneshot(req).await.unwrap();
    assert_eq!(resp.status(), StatusCode::FORBIDDEN);

    let body = to_bytes(resp.into_body(), usize::MAX).await.unwrap();
    let val: Value = serde_json::from_slice(&body).unwrap();
    assert!(val["error"]["message"].as_str().unwrap().contains("wg0"));

    // 3. Confirm DB and kernel state remain intact
    let db_wg0 = store.get_interface(wg0.id).await.unwrap();
    assert!(db_wg0.is_some());

    let live = wg_engine.list_interfaces().await.unwrap();
    assert!(live.contains(&"wg0".to_string()));
}

#[tokio::test]
async fn test_wg0_disable_rejected() {
    let (_dir, store, _state, _wg_engine, _net, _rec, app, cookie) = setup_test_context().await;

    // 1. Create wg0 interface
    let wg0 = fixture_interface("wg0", "10.100.0.1/24");
    store.create_interface(&wg0).await.expect("create wg0");

    // 2. Attempt disable via API
    let req = Request::builder()
        .method("POST")
        .uri(format!("/api/v1/interfaces/{}/disable", wg0.id))
        .header(header::COOKIE, &cookie)
        .body(Body::empty())
        .unwrap();

    let resp = app.clone().oneshot(req).await.unwrap();
    assert_eq!(resp.status(), StatusCode::FORBIDDEN);

    // 3. Confirm enabled remains true in DB
    let db_wg0 = store.get_interface(wg0.id).await.unwrap().unwrap();
    assert!(db_wg0.enabled);
}

#[tokio::test]
async fn test_orphan_interface_reconciliation() {
    let (_dir, store, _state, wg_engine, _net, reconciler, _app, _cookie) =
        setup_test_context().await;

    // 1. Create desired interface wg0
    let wg0 = fixture_interface("wg0", "10.100.0.1/24");
    store.create_interface(&wg0).await.expect("create wg0");
    wg_engine.sync_interface(&wg0, &[]).await.expect("sync wg0");

    // 2. Inject orphan kernel-only interface (e.g. proton0)
    wg_engine
        .inject_interface_stats(LiveInterfaceStats {
            name: "proton0".to_string(),
            public_key: "OrphanPubKey123456789012345678901234567890=".to_string(),
            listen_port: 51821,
            fwmark: 0,
            addresses: vec!["10.2.0.2/32".to_string()],
            mtu: Some(1420),
            is_up: true,
            peers: vec![],
        })
        .await;

    // 3. Verify kernel has both wg0 and proton0
    let live = wg_engine.list_interfaces().await.unwrap();
    assert!(live.contains(&"wg0".to_string()));
    assert!(live.contains(&"proton0".to_string()));

    // 4. Run reconciliation plan
    let plan = reconciler.plan().await.expect("plan");
    assert!(plan.has_drift);
    let orphan_action = plan
        .actions
        .iter()
        .find(|a| a.action_type == "delete_orphan_interface" && a.resource_id == "proton0");
    assert!(
        orphan_action.is_some(),
        "Expected orphan removal action for proton0"
    );

    // 5. Run reconciliation apply
    let report = reconciler.apply().await.expect("apply");
    assert!(report.success);

    // 6. Confirm kernel interface proton0 is removed, wg0 remains
    let live_after = wg_engine.list_interfaces().await.unwrap();
    assert!(live_after.contains(&"wg0".to_string()));
    assert!(!live_after.contains(&"proton0".to_string()));
}

#[tokio::test]
async fn test_interface_restart_preserves_state() {
    let (_dir, store, _state, wg_engine, _net, _rec, app, cookie) = setup_test_context().await;

    // 1. Create interface with peer
    let wg0 = fixture_interface("wg0", "10.100.0.1/24");
    store.create_interface(&wg0).await.expect("create wg0");
    let peer = fixture_peer(wg0.id, "mobile-alice", "10.100.0.5/32");
    store.create_peer(&peer).await.expect("create peer");

    // 2. Initial sync
    wg_engine
        .sync_interface(&wg0, &[peer.clone()])
        .await
        .expect("sync");

    // 3. Call restart API
    let req = Request::builder()
        .method("POST")
        .uri(format!("/api/v1/interfaces/{}/restart", wg0.id))
        .header(header::COOKIE, &cookie)
        .body(Body::empty())
        .unwrap();

    let resp = app.clone().oneshot(req).await.unwrap();
    assert_eq!(resp.status(), StatusCode::OK);

    // 4. Verify DB object remains identical
    let db_wg0 = store.get_interface(wg0.id).await.unwrap().unwrap();
    assert_eq!(db_wg0.id, wg0.id);
    assert_eq!(db_wg0.name, "wg0");
    assert_eq!(db_wg0.address_v4, wg0.address_v4);
    assert_eq!(db_wg0.public_key.as_str(), wg0.public_key.as_str());

    // 5. Verify live kernel state converged with peer restored
    let stats = wg_engine
        .get_interface_stats("wg0")
        .await
        .unwrap()
        .expect("wg0 stats");
    assert_eq!(stats.name, "wg0");
    assert_eq!(stats.peers.len(), 1);
    assert_eq!(stats.peers[0].public_key, peer.public_key.as_str());
}

#[tokio::test]
async fn test_reconcile_does_not_delete_on_desired_state_read_failure() {
    let (_dir, _store, state, wg_engine, net_engine, _rec, _app, _cookie) =
        setup_test_context().await;

    // 1. Inject live interface in kernel
    wg_engine
        .inject_interface_stats(LiveInterfaceStats {
            name: "wg0".to_string(),
            public_key: "Wg0PubKey12345678901234567890123456789012=".to_string(),
            listen_port: 51820,
            fwmark: 0,
            addresses: vec!["10.100.0.1/24".to_string()],
            mtu: Some(1420),
            is_up: true,
            peers: vec![],
        })
        .await;

    // 2. Desired state is empty in DB
    // Reconciler should abort rather than mass-deleting live interfaces
    let reconciler =
        ReconciliationEngine::new(state.clone(), wg_engine.clone(), net_engine.clone());
    let result = reconciler.apply().await;
    assert!(result.is_err(), "Expected reconciliation to abort safely");

    // 3. Confirm live interface was NOT deleted
    let live = wg_engine.list_interfaces().await.unwrap();
    assert!(live.contains(&"wg0".to_string()));
}

#[tokio::test]
async fn test_cli_console_readonly_whitelist() {
    // 1. Test allowed read-only commands
    let allowed_tests = vec![
        ExecuteCliRequest {
            command: "version".to_string(),
            subcommand: None,
            sub_subcommand: None,
            target: None,
            parameters: HashMap::new(),
        },
        ExecuteCliRequest {
            command: "system".to_string(),
            subcommand: Some("status".to_string()),
            sub_subcommand: None,
            target: None,
            parameters: HashMap::new(),
        },
        ExecuteCliRequest {
            command: "interface".to_string(),
            subcommand: Some("list".to_string()),
            sub_subcommand: None,
            target: None,
            parameters: HashMap::new(),
        },
        ExecuteCliRequest {
            command: "interface".to_string(),
            subcommand: Some("show".to_string()),
            sub_subcommand: None,
            target: Some("wg0".to_string()),
            parameters: HashMap::new(),
        },
        ExecuteCliRequest {
            command: "peer".to_string(),
            subcommand: Some("list".to_string()),
            sub_subcommand: None,
            target: None,
            parameters: HashMap::new(),
        },
        ExecuteCliRequest {
            command: "live".to_string(),
            subcommand: Some("interface".to_string()),
            sub_subcommand: Some("list".to_string()),
            target: None,
            parameters: HashMap::new(),
        },
        ExecuteCliRequest {
            command: "reconcile".to_string(),
            subcommand: Some("status".to_string()),
            sub_subcommand: None,
            target: None,
            parameters: HashMap::new(),
        },
    ];

    for req in allowed_tests {
        let argv = build_safe_argv(&req);
        assert!(
            argv.is_ok(),
            "Expected command {:?} to be allowed",
            req.command
        );
    }

    // 2. Test mutating commands are rejected
    let mutating_tests = vec![
        "create", "delete", "update", "set", "enable", "disable", "restart", "apply", "restore",
        "reset", "remove", "flush", "add", "sh", "bash", "sudo",
    ];

    for cmd in mutating_tests {
        let req = ExecuteCliRequest {
            command: cmd.to_string(),
            subcommand: None,
            sub_subcommand: None,
            target: None,
            parameters: HashMap::new(),
        };
        let argv = build_safe_argv(&req);
        assert!(
            argv.is_err(),
            "Expected mutating command '{cmd}' to be rejected"
        );
    }

    // 3. Test shell meta characters in target are rejected
    let bad_targets = vec![
        "-option",
        "wg0; rm -rf /",
        "wg0 | ls",
        "wg0 & sleep 5",
        "wg0 `whoami`",
        "wg0 $(whoami)",
    ];

    for bad in bad_targets {
        let req = ExecuteCliRequest {
            command: "interface".to_string(),
            subcommand: Some("show".to_string()),
            sub_subcommand: None,
            target: Some(bad.to_string()),
            parameters: HashMap::new(),
        };
        let argv = build_safe_argv(&req);
        assert!(
            argv.is_err(),
            "Expected unsafe target '{bad}' to be rejected"
        );
    }

    // 4. Test secrets scrubbing
    let raw_text = r#"
Interface: wg0
PrivateKey: aGVsbG8td29ybGQtdGhpcy1pcy1hLXByaXZhdGUta2V5Cg==
PublicKey: dGVzdC1wdWJsaWMta2V5LTEyMzQ1Njc4OTAxMjM0NTY3OA==
PresharedKey: c2VjcmV0LXByZXNoYXJlZC1rZXktMTIzNDU2Nzg5MDE=
Addresses: 10.100.0.1/24
"#;

    let scrubbed = scrub_secrets(raw_text);
    assert!(!scrubbed.contains("aGVsbG8td29ybGQtdGhpcy1pcy1hLXByaXZhdGUta2V5Cg=="));
    assert!(!scrubbed.contains("c2VjcmV0LXByZXNoYXJlZC1rZXktMTIzNDU2Nzg5MDE="));
    assert!(scrubbed.contains("[REDACTED]"));
    assert!(scrubbed.contains("10.100.0.1/24"));
    assert!(scrubbed.contains("dGVzdC1wdWJsaWMta2V5LTEyMzQ1Njc4OTAxMjM0NTY3OA=="));
}