//! M4: loc frames, F4 confirm typing, identity stays put.

use ed25519_dalek::SigningKey;
use onionwire::Store;
use onionwire::loc::{self, Loc};
use onionwire::tui::{RotateDecision, RotatePrompt};
use rand::rngs::OsRng;

fn pk(tag: u8) -> [u8; 32] {
    let mut k = [0u8; 32];
    k[0] = tag;
    k
}

fn store() -> (tempfile::TempDir, Store) {
    let dir = tempfile::tempdir().expect("tempdir");
    let store = Store::open_at(dir.path()).expect("open");
    (dir, store)
}

#[test]
fn signed_loc_updates_friend_onion_keeps_fingerprint() {
    let (_dir, store) = store();
    let sk = SigningKey::generate(&mut OsRng);
    let pk = sk.verifying_key().to_bytes();
    store
        .upsert_friend(&pk, "old.onion", Some("alice"))
        .unwrap();
    store.set_friend_prekey(&pk, &[1u8; 32]).unwrap();
    let before = store.get_friend(&pk).unwrap().unwrap();

    let ts = 2_000_000_000;
    let loc = loc::sign(&sk.to_bytes(), "new.onion", ts).expect("sign");
    assert!(
        store.apply_loc(&pk, &loc.onion, loc.ts, &loc.sig).unwrap(),
        "newer signed loc must apply"
    );

    let after = store.get_friend(&pk).unwrap().unwrap();
    assert_eq!(after.onion, "new.onion");
    assert_eq!(after.fingerprint, before.fingerprint);
    assert_eq!(after.petname.as_deref(), Some("alice"));
    assert_eq!(store.friend_count().unwrap(), 1);
}

#[test]
fn unsigned_loc_does_not_change_row() {
    let (_dir, store) = store();
    store.upsert_friend(&pk(1), "old.onion", Some("c")).unwrap();
    let loc = Loc {
        onion: "evil.onion".into(),
        ts: 2_000_000_000,
        sig: vec![],
    };
    assert!(
        !store
            .apply_loc(&pk(1), &loc.onion, loc.ts, &loc.sig)
            .unwrap()
    );
    assert_eq!(
        store.get_friend(&pk(1)).unwrap().unwrap().onion,
        "old.onion"
    );
}

#[test]
fn wrong_key_loc_does_not_change_row() {
    let (_dir, store) = store();
    let owner = SigningKey::generate(&mut OsRng);
    let owner_pk = owner.verifying_key().to_bytes();
    store.upsert_friend(&owner_pk, "old.onion", None).unwrap();
    let other = SigningKey::generate(&mut OsRng);
    let loc = loc::sign(&other.to_bytes(), "hijack.onion", 2_000_000_000).unwrap();
    assert!(
        !store
            .apply_loc(&owner_pk, &loc.onion, loc.ts, &loc.sig)
            .unwrap()
    );
    assert_eq!(
        store.get_friend(&owner_pk).unwrap().unwrap().onion,
        "old.onion"
    );
}

#[test]
fn stale_ts_loc_does_not_change_row() {
    let (_dir, store) = store();
    let sk = SigningKey::generate(&mut OsRng);
    let pk = sk.verifying_key().to_bytes();
    store.upsert_friend(&pk, "old.onion", None).unwrap();
    let loc = loc::sign(&sk.to_bytes(), "new.onion", 1).unwrap();
    assert!(!store.apply_loc(&pk, &loc.onion, loc.ts, &loc.sig).unwrap());
    assert_eq!(store.get_friend(&pk).unwrap().unwrap().onion, "old.onion");
}

#[test]
fn loc_frame_roundtrip_and_chat_is_not_loc() {
    let loc = loc::sign(&[7u8; 32], "abc.onion", 42).unwrap();
    let bytes = loc::encode(&loc);
    let parsed = loc::decode(&bytes).expect("loc frame");
    assert_eq!(parsed.onion, "abc.onion");
    assert_eq!(parsed.ts, 42);
    assert_eq!(parsed.sig, loc.sig);
    assert!(loc::decode(b"hello wire").is_none());
}

#[test]
fn f4_requires_typing_rotate_not_enter() {
    let mut p = RotatePrompt::new();
    assert_eq!(p.on_esc(), RotateDecision::Cancel);
    assert_eq!(
        p.on_char('\n'),
        RotateDecision::Pending,
        "Enter must not rotate"
    );
    for c in "ROTA".chars() {
        assert_eq!(p.on_char(c), RotateDecision::Pending);
    }
    assert_eq!(p.on_char('T'), RotateDecision::Pending);
    assert_eq!(p.on_char('E'), RotateDecision::Confirm);
}

#[test]
fn rotate_prompt_text_matches_spec() {
    let t = onionwire::tui::rotate_screen_text();
    assert!(t.contains("Rotate onion address?"));
    assert!(t.contains("Your identity key stays the same."));
    assert!(t.contains("Online friends get a signed location update."));
    assert!(t.contains("Offline friends CANNOT find you until they rescan your QR."));
    assert!(t.contains("Type ROTATE to confirm"));
    assert!(t.contains("Esc to cancel"));
}