//! Tests for the channel messages and the usage record, against byte-exact fixtures. Do not edit.

use proto::{
    CallId, DataClass, DenyReason, Envelope, Epoch, ErrorCode, Hash32, LogRecord, Message,
    SessionId, Timestamp, ToolCall, Turn, TurnDone, TurnEvent, Usage, WireError,
};

fn fixture(kind: &str, name: &str) -> String {
    let path = format!(
        "{}/tests/fixtures/{kind}/{name}",
        env!("CARGO_MANIFEST_DIR")
    );
    std::fs::read_to_string(&path)
        .unwrap_or_else(|e| panic!("{path}: {e}"))
        .trim_end_matches('\n')
        .to_string()
}

fn check(name: &str, want: Envelope) {
    let text = fixture("wire", name);
    let got: Envelope = serde_json::from_str(&text).unwrap_or_else(|e| panic!("{name}: {e}"));
    assert_eq!(got, want, "{name}: decoded value");
    assert_eq!(
        serde_json::to_string(&want).unwrap(),
        text,
        "{name}: encoded bytes"
    );
}

fn env(id: u64, r#final: bool, msg: Message) -> Envelope {
    Envelope {
        v: 1,
        id,
        r#final,
        msg,
    }
}

fn usage() -> Usage {
    Usage {
        cache_n: 539,
        prompt_n: 27,
        predicted_n: 24,
        reasoning_tokens: 8,
        thinking_capped: false,
    }
}

#[test]
fn turn() {
    let body = Turn {
        session: SessionId::new("chat-1789700000-42").unwrap(),
        content: "What time is it?".to_string(),
        resume: false,
    };
    check("turn.json", env(3, true, Message::Turn(body)));
}

#[test]
fn turn_events() {
    check(
        "turn_event_tool_result.json",
        env(
            3,
            false,
            Message::TurnEvent(TurnEvent::ToolResult {
                name: "clock".to_string(),
                class: DataClass::Public,
                truncated: false,
            }),
        ),
    );
    check(
        "turn_event_content.json",
        env(
            3,
            false,
            Message::TurnEvent(TurnEvent::Content {
                text: "It is ".to_string(),
            }),
        ),
    );
    check(
        "turn_event_retrying.json",
        env(
            3,
            false,
            Message::TurnEvent(TurnEvent::Retrying {
                attempt: 2,
                after_ms: 1500,
                error: "the server went silent".to_string(),
            }),
        ),
    );
    check(
        "turn_event_approval_pending.json",
        env(
            3,
            false,
            Message::TurnEvent(TurnEvent::ApprovalPending {
                approval: 41,
                tool: "shell".to_string(),
                expires: Timestamp::parse("2026-09-18T08:20:00.000Z").unwrap(),
            }),
        ),
    );
    check(
        "turn_event_tool_denied.json",
        env(
            3,
            false,
            Message::TurnEvent(TurnEvent::ToolDenied {
                name: "read_file".to_string(),
                reason: DenyReason::NoGrant,
            }),
        ),
    );
}

#[test]
fn turn_done_and_the_new_error_codes() {
    check(
        "turn_done.json",
        env(
            3,
            true,
            Message::TurnDone(TurnDone {
                content: "It is noon.".to_string(),
                usage: usage(),
            }),
        ),
    );
    let body = WireError {
        code: ErrorCode::SessionFull,
        detail: "this conversation is full; start a new one".to_string(),
    };
    check(
        "error_session_full.json",
        env(3, true, Message::Error(body)),
    );
    let codes = [
        (ErrorCode::SessionFull, "session_full"),
        (ErrorCode::TurnLimit, "turn_limit"),
        (ErrorCode::SessionBusy, "session_busy"),
        (ErrorCode::NoSuchSession, "no_such_session"),
        (ErrorCode::SessionExists, "session_exists"),
        (ErrorCode::Inference, "inference"),
    ];
    for (value, text) in codes {
        assert_eq!(
            serde_json::to_string(&value).unwrap(),
            format!("\"{text}\"")
        );
    }
}

#[test]
fn every_turn_event_kind_round_trips() {
    let all = vec![
        TurnEvent::Queued { ahead: 1 },
        TurnEvent::Waiting { slot_busy: true },
        TurnEvent::Progress {
            total: 100,
            cache: 50,
            processed: 75,
        },
        TurnEvent::Reasoning {
            text: "hm".to_string(),
        },
        TurnEvent::Content {
            text: "hi".to_string(),
        },
        TurnEvent::ToolCallStarted {
            name: "clock".to_string(),
        },
        TurnEvent::ToolResult {
            name: "clock".to_string(),
            class: DataClass::Secret,
            truncated: true,
        },
        TurnEvent::ThinkingCapped { tokens: 4096 },
        TurnEvent::Retrying {
            attempt: 2,
            after_ms: 10,
            error: "x".to_string(),
        },
        TurnEvent::CacheLoss {
            expected: 500,
            got: 20,
        },
        TurnEvent::ApprovalPending {
            approval: u64::MAX,
            tool: "http_fetch".to_string(),
            expires: Timestamp::parse("2026-09-18T08:20:00.000Z").unwrap(),
        },
        TurnEvent::ToolDenied {
            name: "shell".to_string(),
            reason: DenyReason::StateUnreadable,
        },
    ];
    for event in all {
        let text = serde_json::to_string(&event).unwrap();
        assert!(text.starts_with("{\"event\":\""), "{text}");
        assert_eq!(serde_json::from_str::<TurnEvent>(&text).unwrap(), event);
    }
    assert!(serde_json::from_str::<TurnEvent>(r#"{"event":"content","text":"x","zz":1}"#).is_err());
    assert!(serde_json::from_str::<TurnEvent>(r#"{"event":"dance"}"#).is_err());
}

#[test]
fn usage_records() {
    let text = fixture("records", "session_usage.jsonl");
    let lines: Vec<&str> = text.lines().collect();
    let want = [
        LogRecord::SessionStart {
            time: Timestamp::parse("2026-09-18T08:05:00.000Z").unwrap(),
            session: SessionId::new("chat-1789700000-42").unwrap(),
            epoch: Epoch(0),
            slot: 0,
            baseline: Hash32::from_hex(
                "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
            )
            .unwrap(),
        },
        LogRecord::User {
            time: Timestamp::parse("2026-09-18T08:05:01.000Z").unwrap(),
            content: "What time is it?".to_string(),
        },
        LogRecord::Assistant {
            time: Timestamp::parse("2026-09-18T08:05:03.000Z").unwrap(),
            content: None,
            reasoning_content: None,
            tool_calls: vec![ToolCall {
                id: "call_a1".to_string(),
                name: "clock".to_string(),
                arguments: "{}".to_string(),
            }],
        },
        LogRecord::Usage {
            time: Timestamp::parse("2026-09-18T08:05:03.000Z").unwrap(),
            cache_n: 539,
            prompt_n: 27,
            predicted_n: 24,
            reasoning_tokens: 8,
            thinking_capped: false,
        },
        LogRecord::ToolResult {
            time: Timestamp::parse("2026-09-18T08:05:03.100Z").unwrap(),
            call: CallId(1),
            tool_call_id: "call_a1".to_string(),
            content: "2026-09-18T08:05:03.000Z".to_string(),
            class: DataClass::Public,
            untrusted: false,
            truncated: false,
        },
        LogRecord::Assistant {
            time: Timestamp::parse("2026-09-18T08:05:05.000Z").unwrap(),
            content: Some("It is five past eight.".to_string()),
            reasoning_content: None,
            tool_calls: vec![],
        },
        LogRecord::Usage {
            time: Timestamp::parse("2026-09-18T08:05:05.000Z").unwrap(),
            cache_n: 589,
            prompt_n: 40,
            predicted_n: 64,
            reasoning_tokens: 27,
            thinking_capped: true,
        },
    ];
    assert_eq!(lines.len(), want.len());
    for (i, (line, want)) in lines.iter().zip(&want).enumerate() {
        let got: LogRecord =
            serde_json::from_str(line).unwrap_or_else(|e| panic!("line {}: {e}", i + 1));
        assert_eq!(&got, want, "line {}", i + 1);
        assert_eq!(
            &serde_json::to_string(want).unwrap(),
            line,
            "line {}: bytes",
            i + 1
        );
    }
}