package pipeline

import (
	"context"
	"testing"
	"time"

	"github.com/grafana/grafana-plugin-sdk-go/backend"
	"github.com/grafana/grafana-plugin-sdk-go/data"
	"github.com/grafana/grafana-plugin-sdk-go/experimental"
	"github.com/stretchr/testify/require"
)

func checkExactConversion(t *testing.T, file string, fields []Field) *backend.DataResponse {
	t.Helper()
	content := loadTestJson(t, file)

	converter := NewExactJsonConverter(ExactJsonConverterConfig{
		Fields: fields,
	})
	converter.nowTimeFunc = func() time.Time {
		return time.Date(2021, 01, 01, 12, 12, 12, 0, time.UTC)
	}
	channelFrames, err := converter.Convert(context.Background(), Vars{}, content)
	require.NoError(t, err)

	dr := &backend.DataResponse{}
	for _, cf := range channelFrames {
		require.Empty(t, cf.Channel)
		dr.Frames = append(dr.Frames, cf.Frame)
	}

	experimental.CheckGoldenJSONResponse(t, "testdata", file+".golden", dr, *update)
	return dr
}

func BenchmarkExactJsonConverter_Convert(b *testing.B) {
	content := loadTestJson(b, "json_exact")

	converter := NewExactJsonConverter(ExactJsonConverterConfig{
		Fields: []Field{
			{
				Name:  "ax",
				Value: "$.ax",
				Type:  data.FieldTypeNullableFloat64,
			}, {
				Name:  "array_value",
				Value: "$.string_array[0]",
				Type:  data.FieldTypeNullableString,
			}, {
				Name:  "map_key",
				Value: "$.map_with_floats['key1']",
				Type:  data.FieldTypeNullableFloat64,
			},
		},
	})

	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_, err := converter.Convert(context.Background(), Vars{}, content)
		require.NoError(b, err)
		//require.Len(b, cf, 1)
		//require.Len(b, cf[0].Frame.Fields, 3)
	}
}

func TestExactJsonConverter_Convert(t *testing.T) {
	checkExactConversion(t, "json_exact", []Field{
		{
			Name:  "time",
			Value: "#{now}",
			Type:  data.FieldTypeTime,
		},
		{
			Name:  "ax",
			Value: "$.ax",
			Type:  data.FieldTypeNullableFloat64,
		},
		{
			Name:  "key1",
			Value: "{x.map_with_floats.key1}",
			Type:  data.FieldTypeNullableFloat64,
			Labels: []Label{
				{
					Name:  "label1",
					Value: "{x.map_with_floats.key2.toString()}",
				},
				{
					Name:  "label2",
					Value: "$.map_with_floats.key2",
				},
			},
		},
	})
}