package companies

import (
	"errors"
	"testing"

	"github.com/stretchr/testify/require"
	"src.dualinventive.com/go/companies-service/internal/domain"
	"src.dualinventive.com/go/mtinfo-go"
)

var companyService *CompanyService           //nolint:gochecknoglobals
var companyRepository *TestCompanyRepository //nolint:gochecknoglobals

func TestGetCompanyByID_GivenUnknownID_ReturnsCompanyNotFoundError(t *testing.T) {
	before(t)
	//given
	companyRepository.returnMe = []*domain.Company{nil}
	companyRepository.returnErr = []error{nil}

	//when
	company, err := companyService.GetCompanyByID("", 123)

	//then
	require.Nil(t, company)
	require.NotNil(t, err)
	require.EqualError(t, err, "company not found")
}

func TestGetCompanyByID_GivenKnownID_ReturnsCompany(t *testing.T) {
	before(t)
	//given
	companyRepository.returnMe = []*domain.Company{{ID: 123, Name: "someCompanyname"}}
	companyRepository.returnErr = []error{nil}

	//when
	company, err := companyService.GetCompanyByID("", 123)

	//then
	require.NotNil(t, company)
	require.Equal(t, company.Name, "someCompanyname")
	require.Nil(t, err)
}

func TestGetCompanyByID_WhenRepositoryError_ReturnsRepositoryError(t *testing.T) {
	before(t)
	//given
	companyRepository.returnMe = []*domain.Company{nil}
	companyRepository.returnErr = []error{errors.New("some repository error")}

	//when
	company, err := companyService.GetCompanyByID("", 123)

	//then
	require.Nil(t, company)
	require.NotNil(t, err)
	require.EqualError(t, err, "failed to fetch company: some repository error")
}

func TestGetCompanies_GivenCorrectParams_ReturnsCompanies(t *testing.T) {
	before(t)
	//given
	companyRepository.returnMeMulti = [][]domain.Company{{
		{ID: 123, Name: "someCompanyname"},
		{ID: 321, Name: "anotherCompanyname"},
	}}
	companyRepository.returnErr = []error{nil}

	//when
	companies, count, err := companyService.GetCompanies("", 1, 1, "")

	//then
	require.NotNil(t, companies)
	require.Equal(t, count, uint64(2))
	require.Equal(t, companies[0].Name, "someCompanyname")
	require.Nil(t, err)
}

func TestGetCompanies_GivenZeroPage_ReturnsInvalidArgument(t *testing.T) { //nolint: dupl
	before(t)
	//given
	companyRepository.returnMeMulti = [][]domain.Company{nil}
	companyRepository.returnErr = []error{nil}

	//when
	companies, count, err := companyService.GetCompanies("", 0, 1, "")

	//then
	require.Nil(t, companies)
	require.Equal(t, count, uint64(0))
	require.IsType(t, new(ErrInvalidArgument), err)
}

func TestGetCompanies_GivenZeroPerPage_ReturnsInvalidArgument(t *testing.T) { //nolint: dupl
	before(t)
	//given
	companyRepository.returnMeMulti = [][]domain.Company{nil}
	companyRepository.returnErr = []error{nil}

	//when
	companies, count, err := companyService.GetCompanies("", 1, 0, "")

	//then
	require.Nil(t, companies)
	require.Equal(t, count, uint64(0))
	require.IsType(t, new(ErrInvalidArgument), err)
}

func TestGetCompanies_GivenTooLargePerPage_ReturnsInvalidArgument(t *testing.T) { //nolint: dupl
	before(t)
	//given
	companyRepository.returnMeMulti = [][]domain.Company{nil}
	companyRepository.returnErr = []error{nil}

	//when
	companies, count, err := companyService.GetCompanies("", 1, 201, "")

	//then
	require.Nil(t, companies)
	require.Equal(t, count, uint64(0))
	require.IsType(t, new(ErrInvalidArgument), err)
}

func TestGetCompanies_WhenRepositoryError_ReturnsRepositoryError(t *testing.T) {
	before(t)
	//given
	companyRepository.returnMeMulti = [][]domain.Company{nil}
	companyRepository.returnErr = []error{errors.New("some repository error")}

	//when
	companies, count, err := companyService.GetCompanies("", 1, 1, "")

	//then
	require.Nil(t, companies)
	require.Equal(t, count, uint64(0))
	require.IsType(t, new(ErrCompanyRepositoryErr), err)
}

func before(t *testing.T) {
	companyRepository = NewTestCompanyRepository(t)
	companyService = &CompanyService{
		CompanyRepository: companyRepository,
		Mtinfo: &mtinfo.Client{
			Auth: &testAuthClient{},
		},
	}
}

//NewTestCompanyRepository returns a mockable company repository.
func NewTestCompanyRepository(t *testing.T) *TestCompanyRepository {
	return &TestCompanyRepository{t: t, callCount: 0, returnMe: []*domain.Company{nil}, returnErr: []error{nil}}
}

type TestCompanyRepository struct {
	t             *testing.T
	callCount     int
	returnMe      []*domain.Company
	returnMeMulti [][]domain.Company
	returnErr     []error
}

func (r TestCompanyRepository) GetCompanyByID(companyID uint64) (*domain.Company, error) {
	returnMe := r.returnMe[r.callCount]
	returnErr := r.returnErr[r.callCount]
	r.callCount++
	return returnMe, returnErr
}

func (r TestCompanyRepository) GetCompanies(
	page uint64, perPage uint64, sort domain.SortCol) (
	[]domain.Company, uint64, error) {
	returnMeMulti := r.returnMeMulti[r.callCount]
	returnErr := r.returnErr[r.callCount]
	r.callCount++
	return returnMeMulti, uint64(len(returnMeMulti)), returnErr
}

//testAuthClient contains authentication related operations over GRPC
type testAuthClient struct{}

//VerifyToken verifies the given token to see if its valid.
//When a public key is configured, token is locally verified using JWT.
//When no public key is configured, token is remotely verified using GRPC.
//Returns false when token signed portion is invalid, or token is expired.
func (as *testAuthClient) VerifyToken(token string) (bool, error)         { return true, nil }
func (as *testAuthClient) VerifyTokenRemotely(token string) (bool, error) { return true, nil }

func (as *testAuthClient) Login(username, companyCode, password string) (string, error) {
	return "", nil
}

func (as *testAuthClient) Logout(token string) error { return nil }

func (as *testAuthClient) Me(token string) (*mtinfo.User, error) { return nil, nil }

func (as *testAuthClient) RequestPasswordReset(username string) error { return nil }

func (as *testAuthClient) RedeemPasswordReset(username, resetCode, password, passwordVerify string) error {
	return nil
}

func (as *testAuthClient) ListTokens(token string) (mtinfo.OpaqueTokens, error) { return nil, nil }

func (as *testAuthClient) DeleteToken(token string, opaqueToken string) error { return nil }
func (as *testAuthClient) UserAgent() string                                  { return "" }
func (as *testAuthClient) SetUserAgent(string)                                {}