//! Tests for identifiers and primitive values. Do not edit: these define the required behaviour.

use proto::{CallId, DataClass, Epoch, Hash32, SessionId, Timestamp, ValueError};

#[test]
fn session_id_accepts_lowercase_digits_and_hyphen() {
    for ok in ["a", "mm-thread-42", "0", "a-b-c", &"x".repeat(64)] {
        assert_eq!(SessionId::new(ok).unwrap().as_str(), ok);
    }
}

#[test]
fn session_id_rejects_everything_else() {
    let too_long = "x".repeat(65);
    for bad in [
        "",
        "A",
        "a b",
        "a/b",
        "../etc",
        "a.b",
        "a_b",
        "é",
        "a\n",
        too_long.as_str(),
    ] {
        assert_eq!(
            SessionId::new(bad),
            Err(ValueError::SessionId),
            "accepted {bad:?}"
        );
    }
}

#[test]
fn session_id_json_is_a_plain_string_and_is_validated() {
    let id = SessionId::new("mm-thread-42").unwrap();
    assert_eq!(serde_json::to_string(&id).unwrap(), r#""mm-thread-42""#);
    assert_eq!(
        serde_json::from_str::<SessionId>(r#""mm-thread-42""#).unwrap(),
        id
    );
    assert!(serde_json::from_str::<SessionId>(r#""../etc""#).is_err());
    assert!(serde_json::from_str::<SessionId>("42").is_err());
}

#[test]
fn epoch_and_call_id_are_plain_numbers() {
    assert_eq!(serde_json::to_string(&Epoch(3)).unwrap(), "3");
    assert_eq!(
        serde_json::to_string(&CallId(18446744073709551615)).unwrap(),
        "18446744073709551615"
    );
    assert_eq!(serde_json::from_str::<CallId>("7").unwrap(), CallId(7));
    assert!(serde_json::from_str::<CallId>("-1").is_err());
    assert!(serde_json::from_str::<CallId>("1.5").is_err());
    assert!(serde_json::from_str::<Epoch>("4294967296").is_err());
}

#[test]
fn hash32_hex_round_trip() {
    let mut bytes = [0u8; 32];
    for (i, b) in bytes.iter_mut().enumerate() {
        *b = i as u8;
    }
    let h = Hash32::from_bytes(bytes);
    let hex = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f";
    assert_eq!(h.to_hex(), hex);
    assert_eq!(Hash32::from_hex(hex).unwrap(), h);
    assert_eq!(h.as_bytes(), &bytes);
    assert_eq!(serde_json::to_string(&h).unwrap(), format!("\"{hex}\""));
    assert_eq!(
        serde_json::from_str::<Hash32>(&format!("\"{hex}\"")).unwrap(),
        h
    );
    assert_eq!(Hash32::ZERO.to_hex(), "0".repeat(64));
}

#[test]
fn hash32_rejects_wrong_length_uppercase_and_non_hex() {
    let upper = "000102030405060708090A0B0C0D0E0F101112131415161718191a1b1c1d1e1f";
    let non_hex = "g00102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f";
    let non_ascii = format!("é{}", "0".repeat(62));
    for bad in [
        "",
        "00",
        &"0".repeat(63),
        &"0".repeat(65),
        upper,
        non_hex,
        non_ascii.as_str(),
    ] {
        assert_eq!(
            Hash32::from_hex(bad),
            Err(ValueError::Hash32),
            "accepted {bad:?}"
        );
    }
}

#[test]
fn timestamp_has_one_spelling() {
    let t = Timestamp::from_unix_millis(1_789_632_300_000);
    assert_eq!(t.unix_millis(), 1_789_632_300_000);
    assert_eq!(t.to_rfc3339(), "2026-09-17T08:05:00.000Z");
    assert_eq!(Timestamp::parse("2026-09-17T08:05:00.000Z").unwrap(), t);
    assert_eq!(
        serde_json::to_string(&t).unwrap(),
        r#""2026-09-17T08:05:00.000Z""#
    );
    assert_eq!(
        Timestamp::from_unix_millis(0).to_rfc3339(),
        "1970-01-01T00:00:00.000Z"
    );
    assert_eq!(
        Timestamp::from_unix_millis(1_789_632_300_007).to_rfc3339(),
        "2026-09-17T08:05:00.007Z"
    );
}

#[test]
fn timestamp_rejects_other_spellings() {
    for bad in [
        "2026-09-17T08:05:00Z",
        "2026-09-17T08:05:00.0Z",
        "2026-09-17T08:05:00.000000Z",
        "2026-09-17 08:05:00.000Z",
        "2026-09-17T08:05:00.000+00:00",
        "2026-09-17t08:05:00.000z",
        "2026-09-17",
        "",
        "now",
    ] {
        assert_eq!(
            Timestamp::parse(bad),
            Err(ValueError::Timestamp),
            "accepted {bad:?}"
        );
        assert!(serde_json::from_str::<Timestamp>(&format!("\"{bad}\"")).is_err());
    }
    assert!(serde_json::from_str::<Timestamp>("1789632300000").is_err());
}

#[test]
fn timestamp_now_is_after_2026() {
    assert!(Timestamp::now() > Timestamp::parse("2026-01-01T00:00:00.000Z").unwrap());
}

#[test]
fn data_class_is_ordered_and_lowercase() {
    assert!(DataClass::Public < DataClass::Private);
    assert!(DataClass::Private < DataClass::Secret);
    assert_eq!(DataClass::Private.max(DataClass::Secret), DataClass::Secret);
    assert_eq!(
        serde_json::to_string(&DataClass::Secret).unwrap(),
        r#""secret""#
    );
    assert_eq!(
        serde_json::from_str::<DataClass>(r#""public""#).unwrap(),
        DataClass::Public
    );
    assert!(serde_json::from_str::<DataClass>(r#""Public""#).is_err());
    assert!(serde_json::from_str::<DataClass>(r#""internal""#).is_err());
}

#[test]
fn value_error_is_a_std_error_with_a_message() {
    let e: Box<dyn std::error::Error> = Box::new(ValueError::Hash32);
    assert!(!e.to_string().is_empty());
}