package eval

import (
	"strings"
	"testing"
	"time"
)

func TestSwitchStaysDirectWithoutScores(t *testing.T) {
	dec := DecideSwitch(nil, nil)
	if dec.Met || !strings.Contains(Report(dec), "保持 direct") {
		t.Fatalf("%+v %s", dec, Report(dec))
	}
}

func TestSwitchRequiresScoreAndLatency(t *testing.T) {
	direct := &EntryScore{Name: "direct", Score: 80, FirstTokenP50: time.Second}
	slow := &EntryScore{Name: "squad", Score: 90, FirstTokenP50: 5 * time.Second}
	if DecideSwitch(direct, slow).Met {
		t.Fatal("extra latency above 3s must block the switch")
	}
	ok := &EntryScore{Name: "squad", Score: 80, FirstTokenP50: 3 * time.Second}
	dec := DecideSwitch(direct, ok)
	if !dec.Met || !strings.Contains(Report(dec), "改为 squad") {
		t.Fatalf("%+v %s", dec, Report(dec))
	}
}