package platform

import (
	"testing"
	"time"
)

func TestParseFanSpeeds(t *testing.T) {
	raw := "FAN1 | 2400.000 | RPM | ok\nFAN2 | 1800 RPM | ok | ok\nFAN3 | na | RPM | ns\n"
	got := parseFanSpeeds(raw)
	if len(got) != 2 {
		t.Fatalf("fans=%d want 2 (%v)", len(got), got)
	}
	if got[0].Name != "FAN1" || got[0].RPM != 2400 {
		t.Fatalf("fan0=%+v", got[0])
	}
	if got[1].Name != "FAN2" || got[1].RPM != 1800 {
		t.Fatalf("fan1=%+v", got[1])
	}
}

func TestFirstFanInputValue(t *testing.T) {
	feature := map[string]any{
		"fan1_input": 9200.0,
	}
	got, ok := firstFanInputValue(feature)
	if !ok || got != 9200 {
		t.Fatalf("got=%v ok=%v", got, ok)
	}
}

func TestParseDCMIPowerReading(t *testing.T) {
	raw := `
Instantaneous power reading:                   512 Watts
Minimum during sampling period:               498 Watts
`
	if got := parseDCMIPowerReading(raw); got != 512 {
		t.Fatalf("parseDCMIPowerReading()=%v want 512", got)
	}
}

func TestEffectiveSystemPowerReading(t *testing.T) {
	now := time.Now()
	cache := cachedPowerReading{Value: 480, UpdatedAt: now.Add(-5 * time.Second)}

	got, updated := effectiveSystemPowerReading(cache, 0, now)
	if got != 480 {
		t.Fatalf("got=%v want cached 480", got)
	}
	if updated.Value != 480 {
		t.Fatalf("updated=%+v", updated)
	}

	got, updated = effectiveSystemPowerReading(cache, 530, now)
	if got != 530 {
		t.Fatalf("got=%v want 530", got)
	}
	if updated.Value != 530 {
		t.Fatalf("updated=%+v", updated)
	}

	expired := cachedPowerReading{Value: 480, UpdatedAt: now.Add(-systemPowerHoldTTL - time.Second)}
	got, _ = effectiveSystemPowerReading(expired, 0, now)
	if got != 0 {
		t.Fatalf("expired cache returned %v want 0", got)
	}
}