package classify

import (
	"sort"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestLabel_AppendLabel(t *testing.T) {
	cat := Label{Name: "cat", Source: "location", Uncertainty: 80, Priority: 5}
	dog := Label{Name: "dog", Source: "location", Uncertainty: 80, Priority: 5}
	labels := Labels{cat, dog}

	t.Run("labelWithName", func(t *testing.T) {
		assert.Equal(t, 2, labels.Len())
		cow := Label{Name: "cow", Source: "location", Uncertainty: 80, Priority: 5}
		labelsNew := labels.AppendLabel(cow)
		assert.Equal(t, 3, labelsNew.Len())
		assert.Equal(t, "dog", labelsNew[1].Name)
		assert.Equal(t, "cat", labelsNew[0].Name)
		assert.Equal(t, "cow", labelsNew[2].Name)
	})

	t.Run("labelWithoutName", func(t *testing.T) {
		assert.Equal(t, 2, labels.Len())
		cow := Label{Name: "", Source: "location", Uncertainty: 80, Priority: 5}
		labelsNew := labels.AppendLabel(cow)
		assert.Equal(t, 2, labelsNew.Len())
		assert.Equal(t, "dog", labelsNew[1].Name)
	})
}

func TestLabels_Title(t *testing.T) {
	t.Run("first", func(t *testing.T) {
		cat := Label{Name: "cat", Source: "location", Uncertainty: 59, Priority: 5}
		dog := Label{Name: "dog", Source: "location", Uncertainty: 10, Priority: 4}
		labels := Labels{cat, dog}

		assert.Equal(t, "cat", labels.Title("fallback"))
	})

	t.Run("second", func(t *testing.T) {
		cat := Label{Name: "cat", Source: "location", Uncertainty: 61, Priority: 5}
		dog := Label{Name: "dog", Source: "location", Uncertainty: 10, Priority: 4}
		labels := Labels{cat, dog}

		assert.Equal(t, "dog", labels.Title("fallback"))
	})

	t.Run("fallback", func(t *testing.T) {
		cat := Label{Name: "cat", Source: "location", Uncertainty: 80, Priority: 5}
		dog := Label{Name: "dog", Source: "location", Uncertainty: 80, Priority: 4}
		labels := Labels{cat, dog}

		assert.Equal(t, "fallback", labels.Title("fallback"))
	})

	t.Run("empty labels", func(t *testing.T) {
		labels := Labels{}

		assert.Equal(t, "", labels.Title(""))
	})

	t.Run("label priority < 0", func(t *testing.T) {
		cat := Label{Name: "cat", Source: "location", Uncertainty: 59, Priority: -1}
		dog := Label{Name: "dog", Source: "location", Uncertainty: 10, Priority: -1}
		labels := Labels{cat, dog}

		assert.Equal(t, "fallback", labels.Title("fallback"))
	})

	t.Run("label priority = 0", func(t *testing.T) {
		cat := Label{Name: "cat", Source: "location", Uncertainty: 59, Priority: 0}
		dog := Label{Name: "dog", Source: "location", Uncertainty: 62, Priority: 0}
		labels := Labels{cat, dog}

		assert.Equal(t, "fallback", labels.Title("fallback"))
	})
}

func TestLabels_Keywords(t *testing.T) {
	cat := Label{Name: "cat", Source: "location", Uncertainty: 80, Priority: 5, Categories: []string{"animal"}}
	dog := Label{Name: "dog", Source: "location", Uncertainty: 80, Priority: 5}
	bird := Label{Name: "bird", Source: "image", Uncertainty: 100, Priority: 2}
	labels := Labels{cat, dog, bird}

	t.Run("labelWithName", func(t *testing.T) {
		result := labels.Keywords()
		t.Log(result)
		assert.Equal(t, "cat", result[0])
		assert.Equal(t, "animal", result[1])
		assert.Equal(t, "dog", result[2])
		assert.Equal(t, 3, len(result))
	})
}

func TestLabel_Sort(t *testing.T) {
	labels := Labels{
		{Name: "label 0", Source: "location", Uncertainty: 100, Priority: 10},
		{Name: "label 1", Source: "location", Uncertainty: 100, Priority: -1},
		{Name: "label 2", Source: "location", Uncertainty: 80, Priority: 5},
		{Name: "label 3", Source: "location", Uncertainty: 80, Priority: 5},
		{Name: "label 4", Source: "location", Uncertainty: 99, Priority: 5},
		{Name: "label 5", Source: "location", Uncertainty: 1, Priority: 0},
		{Name: "label 6", Source: "location", Uncertainty: 0, Priority: 5},
		{Name: "label 7", Source: "location", Uncertainty: 0, Priority: 1},
		{Name: "label 8", Source: "location", Uncertainty: 101, Priority: 5},
	}

	sort.Sort(labels)

	assert.Equal(t, "label 6", labels[0].Name)
	assert.Equal(t, "label 2", labels[1].Name)
	assert.Equal(t, "label 3", labels[2].Name)
	assert.Equal(t, "label 4", labels[3].Name)
	assert.Equal(t, "label 7", labels[4].Name)
	assert.Equal(t, "label 5", labels[5].Name)
	assert.Equal(t, "label 0", labels[6].Name)
	assert.Equal(t, "label 1", labels[7].Name)
	assert.Equal(t, "label 8", labels[8].Name)
}