//! Tests for audit and session log records against JSONL fixtures. Do not edit these or the fixtures.

use proto::{
    ApprovalAnswer, AuditEvent, AuditRecord, CallId, DataClass, DecisionRecord, DenyReason, Epoch,
    Hash32, LogRecord, ResultStatus, SessionId, Timestamp, ToolCall,
};
use serde::{Serialize, de::DeserializeOwned};
use std::fmt::Debug;

const SEQ_HEX: &str = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f";
const REV_HEX: &str = "ffeeddccbbaa99887766554433221100ffeeddccbbaa99887766554433221100";

fn ts(s: &str) -> Timestamp {
    Timestamp::parse(s).unwrap()
}

/// Line `i` of the fixture must decode to `want[i]`, and `want[i]` must encode to exactly that line.
fn check<T: Serialize + DeserializeOwned + PartialEq + Debug>(name: &str, want: &[T]) {
    let path = format!(
        "{}/tests/fixtures/records/{name}",
        env!("CARGO_MANIFEST_DIR")
    );
    let text = std::fs::read_to_string(&path).unwrap_or_else(|e| panic!("{path}: {e}"));
    let lines: Vec<&str> = text.lines().collect();
    assert_eq!(lines.len(), want.len(), "{name}: number of lines");
    for (i, (line, want)) in lines.iter().zip(want).enumerate() {
        let got: T = serde_json::from_str(line).unwrap_or_else(|e| panic!("{name}:{}: {e}", i + 1));
        assert_eq!(&got, want, "{name}:{}: decoded value", i + 1);
        assert_eq!(
            &serde_json::to_string(want).unwrap(),
            line,
            "{name}:{}: encoded bytes",
            i + 1
        );
    }
}

fn sid(s: &str) -> SessionId {
    SessionId::new(s).unwrap()
}

fn record(seq: u64, time: &str, prev: Hash32, event: AuditEvent) -> AuditRecord {
    AuditRecord {
        seq,
        time: ts(time),
        prev,
        event,
    }
}

/// One line per event variant, every `DecisionRecord` variant, and every option both set and unset.
#[test]
fn audit_records() {
    let seq_hash = Hash32::from_hex(SEQ_HEX).unwrap();
    let rev_hash = Hash32::from_hex(REV_HEX).unwrap();
    let want = [
        record(
            0,
            "2026-09-17T08:05:00.000Z",
            Hash32::ZERO,
            AuditEvent::Decision {
                session: sid("mm-thread-42"),
                call: CallId(1),
                tool: "read_file".to_string(),
                arguments: r#"{"path":"/etc/hosts"}"#.to_string(),
                outcome: DecisionRecord::Allowed {},
                grant: Some("read-etc".to_string()),
                grant_sha256: Some(seq_hash),
                taint: DataClass::Private,
                untrusted: false,
            },
        ),
        record(
            1,
            "2026-09-17T08:05:00.500Z",
            seq_hash,
            AuditEvent::Result {
                session: sid("mm-thread-42"),
                call: CallId(1),
                decision: 0,
                status: ResultStatus::Result,
                class: DataClass::Secret,
                untrusted: true,
                truncated: true,
                bytes: 65536,
                sha256: rev_hash,
                taint_after: DataClass::Secret,
            },
        ),
        record(
            2,
            "2026-09-17T08:05:01.250Z",
            rev_hash,
            AuditEvent::Decision {
                session: sid("mm-thread-42"),
                call: CallId(2),
                tool: "shell".to_string(),
                arguments: r#"{"command":"df -h"}"#.to_string(),
                outcome: DecisionRecord::Ask {},
                grant: Some("shell-ask".to_string()),
                grant_sha256: Some(rev_hash),
                taint: DataClass::Secret,
                untrusted: true,
            },
        ),
        record(
            3,
            "2026-09-17T08:06:00.000Z",
            seq_hash,
            AuditEvent::Approval {
                session: sid("mm-thread-42"),
                call: CallId(2),
                decision: 2,
                answer: ApprovalAnswer::Approved,
                by: Some("u8f3k2".to_string()),
                post: Some("p9x7".to_string()),
                reason: None,
                outcome: DecisionRecord::Allowed {},
                grant: Some("shell-auto".to_string()),
                grant_sha256: Some(seq_hash),
                taint: DataClass::Secret,
                untrusted: true,
            },
        ),
        record(
            4,
            "2026-09-17T08:06:00.100Z",
            rev_hash,
            AuditEvent::Result {
                session: sid("mm-thread-42"),
                call: CallId(2),
                decision: 2,
                status: ResultStatus::Failed,
                class: DataClass::Private,
                untrusted: false,
                truncated: false,
                bytes: 27,
                sha256: seq_hash,
                taint_after: DataClass::Secret,
            },
        ),
        record(
            5,
            "2026-09-17T08:07:00.000Z",
            seq_hash,
            AuditEvent::Decision {
                session: sid("cron-morning"),
                call: CallId(1),
                tool: "rm_rf".to_string(),
                arguments: "{}".to_string(),
                outcome: DecisionRecord::Denied {
                    reason: DenyReason::NoGrant,
                },
                grant: None,
                grant_sha256: None,
                taint: DataClass::Private,
                untrusted: false,
            },
        ),
        record(
            6,
            "2026-09-17T08:08:00.000Z",
            rev_hash,
            AuditEvent::Approval {
                session: sid("cron-morning"),
                call: CallId(3),
                decision: 4,
                answer: ApprovalAnswer::Refused,
                by: Some("bxctl".to_string()),
                post: None,
                reason: Some("not \"now\"".to_string()),
                outcome: DecisionRecord::Denied {
                    reason: DenyReason::ApprovalRefused,
                },
                grant: None,
                grant_sha256: None,
                taint: DataClass::Private,
                untrusted: false,
            },
        ),
        record(
            7,
            "2026-09-17T08:23:00.000Z",
            seq_hash,
            AuditEvent::Approval {
                session: sid("cron-morning"),
                call: CallId(4),
                decision: 5,
                answer: ApprovalAnswer::Expired,
                by: None,
                post: None,
                reason: None,
                outcome: DecisionRecord::Denied {
                    reason: DenyReason::ApprovalExpired,
                },
                grant: None,
                grant_sha256: None,
                taint: DataClass::Public,
                untrusted: false,
            },
        ),
        record(
            8,
            "2026-09-18T00:00:00.000Z",
            rev_hash,
            AuditEvent::Recovery {
                torn_bytes: 117,
                torn_sha256: seq_hash,
            },
        ),
        record(
            9,
            "2026-09-18T00:00:01.000Z",
            seq_hash,
            AuditEvent::AcceptedBreak {
                file: "2026-09-17.jsonl".to_string(),
                line: 7,
                last_good: rev_hash,
            },
        ),
    ];
    check("audit.jsonl", &want);
}

#[test]
fn session_log_records() {
    let want = [
        LogRecord::SessionStart {
            time: ts("2026-09-17T08:05:00.000Z"),
            session: SessionId::new("mm-thread-42").unwrap(),
            epoch: Epoch(0),
            slot: 0,
            baseline: Hash32::from_hex(SEQ_HEX).unwrap(),
        },
        LogRecord::User {
            time: ts("2026-09-17T08:05:01.000Z"),
            content: "What is in /etc/hosts?".to_string(),
        },
        LogRecord::Assistant {
            time: ts("2026-09-17T08:05:03.000Z"),
            content: None,
            reasoning_content: Some("The user wants a file.\nI will read it.".to_string()),
            tool_calls: vec![ToolCall {
                id: "call_a1".to_string(),
                name: "read_file".to_string(),
                arguments: r#"{"path":"/etc/hosts"}"#.to_string(),
            }],
        },
        LogRecord::ToolResult {
            time: ts("2026-09-17T08:05:04.000Z"),
            call: CallId(1),
            tool_call_id: "call_a1".to_string(),
            content: "127.0.0.1 localhost\n".to_string(),
            class: DataClass::Private,
            untrusted: true,
            truncated: false,
        },
        LogRecord::Assistant {
            time: ts("2026-09-17T08:05:06.000Z"),
            content: Some("It maps localhost to 127.0.0.1.".to_string()),
            reasoning_content: None,
            tool_calls: vec![],
        },
        LogRecord::CacheLoss {
            time: ts("2026-09-17T09:00:00.000Z"),
            expected: 30695,
            got: 0,
        },
        LogRecord::EpochEnd {
            time: ts("2026-09-17T12:00:00.000Z"),
            next: Epoch(1),
            summary: "Looked at /etc/hosts.".to_string(),
        },
    ];
    check("session.jsonl", &want);
}

#[test]
fn unknown_fields_and_types_are_rejected() {
    let user = r#"{"type":"user","time":"2026-09-17T08:05:01.000Z","content":"hi"}"#;
    assert!(serde_json::from_str::<LogRecord>(user).is_ok());
    let extra = user.replacen("\"content\"", "\"role\":\"user\",\"content\"", 1);
    assert!(serde_json::from_str::<LogRecord>(&extra).is_err());
    let unknown_type = user.replacen("\"user\"", "\"system\"", 1);
    assert!(serde_json::from_str::<LogRecord>(&unknown_type).is_err());

    // A variant with no fields must reject an unknown key too. A serde unit variant would not.
    for decision in [r#"{"outcome":"allowed"}"#, r#"{"outcome":"ask"}"#] {
        assert!(serde_json::from_str::<DecisionRecord>(decision).is_ok());
        let extra = decision.replacen('}', ",\"why\":\"\"}", 1);
        assert!(
            serde_json::from_str::<DecisionRecord>(&extra).is_err(),
            "{extra}"
        );
    }
    let denied = r#"{"outcome":"denied","reason":"no_grant"}"#;
    assert!(serde_json::from_str::<DecisionRecord>(denied).is_ok());
    let extra = denied.replacen("\"reason\"", "\"grant\":null,\"reason\"", 1);
    assert!(serde_json::from_str::<DecisionRecord>(&extra).is_err());
    let approved = r#"{"outcome":"approved"}"#;
    assert!(serde_json::from_str::<DecisionRecord>(approved).is_err());
}