package extkeys_test

import (
	"encoding/json"
	"fmt"
	"os"
	"testing"

	"github.com/status-im/status-go/extkeys"
)

type VectorsFile struct {
	Data    map[string][][6]string
	vectors []*Vector
}

type Vector struct {
	language, salt, password, input, mnemonic, seed, xprv string
}

// TestMnemonicPhrase
func TestMnemonicPhrase(t *testing.T) {

	mnemonic := extkeys.NewMnemonic(extkeys.Salt)

	// test mnemonic generation
	t.Log("Test mnemonic generation:")
	for _, language := range mnemonic.AvailableLanguages() {
		phrase, err := mnemonic.MnemonicPhrase(128, language)
		t.Logf("Mnemonic (%s): %s", extkeys.Languages[language], phrase)

		if err != nil {
			t.Errorf("Test failed: could not create seed: %s", err)
		}

		if !mnemonic.ValidMnemonic(phrase, language) {
			t.Error("Seed is not valid Mnenomic")
		}
	}

	// run against test vectors
	vectorsFile, err := LoadVectorsFile("mnemonic_vectors.json")
	if err != nil {
		t.Error(err)
	}

	t.Log("Test against pre-computed seed vectors:")
	stats := map[string]int{}
	for _, vector := range vectorsFile.vectors {
		stats[vector.language] += 1
		mnemonic := extkeys.NewMnemonic(vector.salt)
		seed := mnemonic.MnemonicSeed(vector.mnemonic, vector.password)
		if fmt.Sprintf("%x", seed) != vector.seed {
			t.Errorf("Test failed (%s): incorrect seed (%x) generated (expected: %s)", vector.language, seed, vector.seed)
			return
		}
		//t.Logf("Test passed: correct seed (%x) generated (expected: %s)", seed, vector.seed)
	}
	for language, count := range stats {
		t.Logf("[%s]: %d tests completed", language, count)
	}
}

func LoadVectorsFile(path string) (*VectorsFile, error) {
	fp, err := os.Open(path)
	if err != nil {
		return nil, fmt.Errorf("Test failed: cannot open vectors file: %s", err)
	}

	var vectorsFile VectorsFile
	if err := json.NewDecoder(fp).Decode(&vectorsFile); err != nil {
		return nil, fmt.Errorf("Test failed: cannot parse vectors file: %s", err)
	}

	// load data into Vector structs
	for language, data := range vectorsFile.Data {
		for _, item := range data {
			vectorsFile.vectors = append(vectorsFile.vectors, &Vector{language, item[0], item[1], item[2], item[3], item[4], item[5]})
		}
	}

	return &vectorsFile, nil
}

func (v *Vector) String() string {
	return fmt.Sprintf("{salt: %s, password: %s, input: %s, mnemonic: %s, seed: %s, xprv: %s}",
		v.salt, v.password, v.input, v.mnemonic, v.seed, v.xprv)
}