package rfctime

import (
	"encoding/json"
	"math"
	"testing"
	"time"

	"git.blackforestbytes.com/BlackForestBytes/goext/tst"
)

func TestSecondsF64Basics(t *testing.T) {
	d := NewSecondsF64(2*time.Second + 500*time.Millisecond)
	tst.AssertEqual(t, d.Duration(), 2500*time.Millisecond)
	tst.AssertEqual(t, d.Seconds(), 2.5)
	tst.AssertEqual(t, d.Milliseconds(), int64(2500))
	tst.AssertEqual(t, d.Microseconds(), int64(2500000))
	tst.AssertEqual(t, d.Nanoseconds(), int64(2500000000))
	tst.AssertEqual(t, d.Minutes(), 2.5/60.0)
	tst.AssertEqual(t, d.Hours(), 2.5/3600.0)
	tst.AssertEqual(t, d.String(), (2500 * time.Millisecond).String())
}

func TestSecondsF64JSON(t *testing.T) {
	type Wrap struct {
		D SecondsF64 `json:"d"`
	}

	w1 := Wrap{D: NewSecondsF64(2500 * time.Millisecond)}
	b, err := json.Marshal(w1)
	if err != nil {
		t.Fatal(err)
	}
	tst.AssertEqual(t, string(b), `{"d":2.5}`)

	var w2 Wrap
	if err := json.Unmarshal(b, &w2); err != nil {
		t.Fatal(err)
	}
	if math.Abs(float64(w2.D.Duration()-w1.D.Duration())) > float64(time.Microsecond) {
		t.Errorf("roundtrip mismatch: %v vs %v", w1.D, w2.D)
	}
}

func TestSecondsF64UnmarshalJSONInvalid(t *testing.T) {
	var d SecondsF64
	if err := d.UnmarshalJSON([]byte(`"not-a-number"`)); err == nil {
		t.Errorf("expected error")
	}
}