"""Tests for kaizen.metrics.recorded event emission."""

from __future__ import annotations

import json
from pathlib import Path
from unittest.mock import AsyncMock, patch

import pytest
from click.testing import CliRunner

from kaizen_agentic.cli import cli
from kaizen_agentic.integrations.event_bus import (
    EVENT_TYPE_METRICS_RECORDED,
    build_metrics_recorded_envelope,
    metrics_summary_for_event,
    nats_subject_for_event,
    publish_metrics_recorded_event,
    resolve_project_slug,
)
from kaizen_agentic.metrics import MetricsStore


def test_metrics_summary_for_event_maps_avg_quality_score() -> None:
    summary = metrics_summary_for_event(
        {
            "success_rate": 0.75,
            "execution_count": 12,
            "avg_quality_score": 0.81,
        }
    )
    assert summary == {
        "success_rate": 0.75,
        "execution_count": 12,
        "avg_quality": 0.81,
    }


def test_build_metrics_recorded_envelope_shape() -> None:
    envelope = build_metrics_recorded_envelope(
        agent="coach",
        project="kaizen-agentic",
        summary={
            "success_rate": 0.9,
            "execution_count": 5,
            "avg_quality_score": 0.85,
        },
        event_id="test-event-id",
    )

    assert envelope["id"] == "test-event-id"
    assert envelope["type"] == EVENT_TYPE_METRICS_RECORDED
    assert envelope["publisher"] == "kaizen-agentic"
    assert envelope["attributes"] == {
        "agent": "coach",
        "project": "kaizen-agentic",
        "summary": {
            "success_rate": 0.9,
            "execution_count": 5,
            "avg_quality": 0.85,
        },
    }


def test_nats_subject_for_event() -> None:
    assert nats_subject_for_event("kaizen.metrics.recorded") == (
        "activity.kaizen.metrics.recorded"
    )


def test_resolve_project_slug_prefers_env(
    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
    monkeypatch.setenv("KAIZEN_PROJECT_SLUG", "custom-slug")
    assert resolve_project_slug(tmp_path / "some-dir") == "custom-slug"


def test_resolve_project_slug_falls_back_to_directory_name(tmp_path: Path) -> None:
    project = tmp_path / "kaizen-agentic"
    project.mkdir()
    assert resolve_project_slug(project) == "kaizen-agentic"


def test_publish_metrics_recorded_event_uses_activity_subject(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    published: dict[str, object] = {}

    async def fake_publish(subject: str, payload: bytes, *, nats_url: str) -> None:
        published["subject"] = subject
        published["payload"] = payload
        published["url"] = nats_url

    monkeypatch.setattr(
        "kaizen_agentic.integrations.event_bus._publish_bytes",
        fake_publish,
    )

    envelope = build_metrics_recorded_envelope(
        agent="coach",
        project="activity-core",
        summary={"success_rate": 1.0, "execution_count": 1, "avg_quality_score": 1.0},
        event_id="evt-1",
    )
    subject = publish_metrics_recorded_event(
        envelope, nats_url="nats://broker.test:4222"
    )

    assert subject == "activity.kaizen.metrics.recorded"
    assert published["subject"] == "activity.kaizen.metrics.recorded"
    body = json.loads(published["payload"].decode())
    assert body["attributes"]["project"] == "activity-core"


def test_metrics_record_emit_event_after_append(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    emitted: list[dict] = []

    def capture(envelope, *, nats_url=None):
        emitted.append(dict(envelope))
        return "activity.kaizen.metrics.recorded"

    monkeypatch.setattr(
        "kaizen_agentic.cli.publish_metrics_recorded_event",
        capture,
    )

    runner = CliRunner()
    result = runner.invoke(
        cli,
        [
            "metrics",
            "record",
            "coach",
            "--target",
            str(tmp_path),
            "--success",
            "--time",
            "120",
            "--quality",
            "0.9",
            "--emit-event",
        ],
    )

    assert result.exit_code == 0, result.output
    assert "Recorded metrics for 'coach'" in result.output
    assert "Emitted kaizen.metrics.recorded" in result.output
    assert len(emitted) == 1
    assert emitted[0]["attributes"]["agent"] == "coach"
    assert emitted[0]["attributes"]["project"] == tmp_path.name
    assert emitted[0]["attributes"]["summary"]["execution_count"] == 1

    store = MetricsStore(tmp_path, "coach")
    assert store.read_summary() is not None


def test_metrics_record_skips_emit_on_idempotency_duplicate(
    tmp_path: Path,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    emitted: list[dict] = []

    def capture(envelope, *, nats_url=None):
        emitted.append(dict(envelope))
        return "activity.kaizen.metrics.recorded"

    monkeypatch.setattr(
        "kaizen_agentic.cli.publish_metrics_recorded_event",
        capture,
    )

    runner = CliRunner()
    common = [
        "metrics",
        "record",
        "coach",
        "--target",
        str(tmp_path),
        "--success",
        "--emit-event",
        "--idempotency-key",
        "session-1",
    ]
    assert runner.invoke(cli, common).exit_code == 0
    assert runner.invoke(cli, common).exit_code == 0
    assert len(emitted) == 1