package goldenfiles

import (
	"bytes"
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/stretchr/testify/require"
	"github.com/volker-raschek/flucky/pkg/storage/logfile"
	"github.com/volker-raschek/flucky/pkg/types"
)

func CompareMeasuredValues(t *testing.T, goldenInterface interface{}, testInterface interface{}) {
	require := require.New(t)

	goldenBuffer := new(bytes.Buffer)
	testBuffer := new(bytes.Buffer)

	jsonEncoder := json.NewEncoder(goldenBuffer)
	jsonEncoder.SetIndent("", " ")
	err := jsonEncoder.Encode(&goldenInterface)
	require.NoError(err)

	jsonEncoder = json.NewEncoder(testBuffer)
	jsonEncoder.SetIndent("", " ")
	err = jsonEncoder.Encode(&testInterface)
	require.NoError(err)

	// t.Log(goldenBuffer.String(), testBuffer.String())

	require.Equal(goldenBuffer.String(), testBuffer.String(), "Expected are not equal with actual value")

}

func GetGoldenDevices(goldenFilePath string) ([]*types.Device, error) {
	file := string(MustAsset(goldenFilePath))
	reader := strings.NewReader(file)
	devices := make([]*types.Device, 0)
	jsonDecoder := json.NewDecoder(reader)
	err := jsonDecoder.Decode(&devices)
	if err != nil {
		return nil, err
	}
	return devices, nil
}

func GetGoldenMeasuredValues(goldenFilePath string) ([]*types.MeasuredValue, error) {
	tempDir := os.TempDir()
	if err := os.MkdirAll(tempDir, 0755); err != nil {
		return nil, fmt.Errorf("Can not create temp directory %v: %v", tempDir, err)
	}
	tempLogfile := filepath.Join(tempDir, fmt.Sprintf("logfile %v", filepath.Ext(goldenFilePath)))
	f, err := os.Create(tempLogfile)
	if err != nil {
		return nil, fmt.Errorf("Can not create temporary logfile %v: %v", tempLogfile, err)
	}
	defer os.Remove(tempLogfile)
	_, err = f.Write(MustAsset(goldenFilePath))
	if err != nil {
		return nil, fmt.Errorf("Can not write into file %v: %v", tempLogfile, err)
	}
	logfile := logfile.New(tempLogfile)
	return logfile.Read()
}

func GetGoldenSensors(goldenFilePath string) ([]*types.Sensor, error) {
	f := string(MustAsset(goldenFilePath))
	r := strings.NewReader(f)
	sensors := make([]*types.Sensor, 0)
	jsonDecoder := json.NewDecoder(r)
	err := jsonDecoder.Decode(&sensors)
	if err != nil {
		return nil, err
	}
	return sensors, nil
}