"""Clusterer + evidence + cross-flavor tests (T05/T06)."""

import os
import sys

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from session_memory.detect.cluster import cluster  # noqa: E402
from session_memory.detect.signals import PROBLEM, SUCCESS, Signal  # noqa: E402


def _sig(uid, flavor, repo, type_, polarity, locus, mag=1.0):
    return Signal(session_uid=uid, flavor=flavor, repo=repo, type=type_,
                  polarity=polarity, locus=locus, magnitude=mag)


def test_min_frequency_filters_singletons():
    sigs = [_sig("claude:a", "claude", "r1", "retry_storm", PROBLEM, "retries")]
    assert cluster(sigs, min_frequency=2) == []


def test_clusters_recurring_signal_with_evidence():
    sigs = [
        _sig("claude:a", "claude", "r1", "retry_storm", PROBLEM, "retries", 5),
        _sig("claude:b", "claude", "r2", "retry_storm", PROBLEM, "retries", 3),
    ]
    pats = cluster(sigs, min_frequency=2)
    assert len(pats) == 1
    p = pats[0]
    assert p.frequency == 2
    assert p.sessions == ["claude:a", "claude:b"]
    assert sorted(p.repos) == ["r1", "r2"]
    assert p.flavors == ["claude"]
    assert p.cross_flavor is False
    assert p.cost_impact == 8.0


def test_cross_flavor_flagged_and_ranked_first():
    sigs = [
        # cross-flavor problem (claude + codex)
        _sig("claude:a", "claude", "r1", "repeated_errors", PROBLEM, "errors", 3),
        _sig("codex:b", "codex", "r2", "repeated_errors", PROBLEM, "errors", 3),
        # single-flavor success cluster with higher raw impact
        _sig("grok:c", "grok", "r3", "clean_pass", SUCCESS, "outcome", 5),
        _sig("grok:d", "grok", "r4", "clean_pass", SUCCESS, "outcome", 5),
    ]
    pats = cluster(sigs, min_frequency=2)
    assert len(pats) == 2
    xf = next(p for p in pats if p.signal_type == "repeated_errors")
    assert xf.cross_flavor is True
    assert sorted(xf.flavors) == ["claude", "codex"]
    # cross-flavor pattern is ranked first even if another has higher raw impact
    assert pats[0].cross_flavor is True
    assert "cross-flavor" in pats[0].title