// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package metrics

import (
	"sort"
	"testing"

	"slices"
)

type S struct{ a, b, c string }

func TestMetrics(t *testing.T) {
	m1 := Metric1[string]{}
	if got := m1.Count("a"); got != 0 {
		t.Errorf("Count(%q) = %d, want 0", "a", got)
	}
	m1.Add("a")
	m1.Add("a")
	if got := m1.Count("a"); got != 2 {
		t.Errorf("Count(%q) = %d, want 2", "a", got)
	}
	if got, want := m1.Metrics(), []string{"a"}; !slices.Equal(got, want) {
		t.Errorf("Metrics = %v, want %v", got, want)
	}

	m2 := Metric2[int, float64]{}
	m2.Add(1, 1)
	m2.Add(2, 2)
	m2.Add(3, 3)
	m2.Add(3, 3)
	k1, k2 := m2.Metrics()

	sort.Ints(k1)
	w1 := []int{1, 2, 3}
	if !slices.Equal(k1, w1) {
		t.Errorf("Metric2.Metrics first slice = %v, want %v", k1, w1)
	}

	sort.Float64s(k2)
	w2 := []float64{1, 2, 3}
	if !slices.Equal(k2, w2) {
		t.Errorf("Metric2.Metrics first slice = %v, want %v", k2, w2)
	}

	m3 := Metric3[string, S, S]{}
	m3.Add("a", S{"d", "e", "f"}, S{"g", "h", "i"})
	m3.Add("a", S{"d", "e", "f"}, S{"g", "h", "i"})
	m3.Add("a", S{"d", "e", "f"}, S{"g", "h", "i"})
	m3.Add("b", S{"d", "e", "f"}, S{"g", "h", "i"})
	if got := m3.Count("a", S{"d", "e", "f"}, S{"g", "h", "i"}); got != 3 {
		t.Errorf("Count(%v, %v, %v) = %d, want 3", "a", S{"d", "e", "f"}, S{"g", "h", "i"}, got)
	}
}