package onboarding

import (
	"context"
	"errors"
	"testing"

	"github.com/google/uuid"
	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common"
	sms "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/sms/v20210111"
)

type fakeTencentSMSSender struct {
	request *sms.SendSmsRequest
	result  *sms.SendSmsResponse
	err     error
	calls   int
}

func (f *fakeTencentSMSSender) SendSmsWithContext(_ context.Context, request *sms.SendSmsRequest) (*sms.SendSmsResponse, error) {
	f.calls++
	f.request = request
	return f.result, f.err
}

func TestTencentSMSProviderUsesApprovedTemplateAndChecksPerPhoneStatus(t *testing.T) {
	provider, err := NewTencentSMSProvider("secret-id", "secret-key", "1400006666", "安芯伴", "123456")
	if err != nil {
		t.Fatal(err)
	}
	p := provider.(*TencentSMSProvider)
	fake := &fakeTencentSMSSender{result: &sms.SendSmsResponse{Response: &sms.SendSmsResponseParams{SendStatusSet: []*sms.SendStatus{{Code: common.StringPtr("Ok")}}}}}
	p.client = fake
	id := uuid.NewString()
	if err = p.Send(context.Background(), "+8613800000000", "123456", id); err != nil {
		t.Fatal(err)
	}
	r := fake.request
	if fake.calls != 1 || *r.SmsSdkAppId != "1400006666" || *r.SignName != "安芯伴" || *r.TemplateId != "123456" ||
		len(r.PhoneNumberSet) != 1 || *r.PhoneNumberSet[0] != "+8613800000000" ||
		len(r.TemplateParamSet) != 1 || *r.TemplateParamSet[0] != "123456" || *r.SessionContext != id {
		t.Fatal("Tencent SMS request does not match approved OTP template")
	}
	fake.result.Response.SendStatusSet[0].Code = common.StringPtr("FailedOperation")
	if err = p.Send(context.Background(), "+8613800000000", "123456", uuid.NewString()); err == nil {
		t.Fatal("provider accepted a failed per-phone send status")
	}
	fake.err = errors.New("transport timeout")
	if err = p.Send(context.Background(), "+8613800000000", "123456", uuid.NewString()); err == nil {
		t.Fatal("provider accepted an uncertain send")
	}
	before := fake.calls
	if err = p.Send(context.Background(), "+15551234567", "123456", uuid.NewString()); err == nil || fake.calls != before {
		t.Fatal("domestic template sent to an international phone")
	}
}

func TestTencentSMSProviderRejectsMissingConfiguration(t *testing.T) {
	for _, config := range [][5]string{
		{"", "key", "1400006666", "安芯伴", "123456"},
		{"id", "", "1400006666", "安芯伴", "123456"},
		{"id", "key", "not-numeric", "安芯伴", "123456"},
		{"id", "key", "1400006666", "", "123456"},
		{"id", "key", "1400006666", "安芯伴", ""},
	} {
		if _, err := NewTencentSMSProvider(config[0], config[1], config[2], config[3], config[4]); err == nil {
			t.Fatal("invalid Tencent SMS configuration accepted")
		}
	}
}

func TestTencentSMSRoutesEachPurposeToItsOwnTemplate(t *testing.T) {
	templates := map[string]string{"login": "101", "register": "102", "change_password": "103", "change_phone": "104"}
	provider, err := NewTencentSMSProviderWithTemplates("id", "key", "1400006666", "安芯伴", templates)
	if err != nil {
		t.Fatal(err)
	}
	p := provider.(*TencentSMSProvider)
	fake := &fakeTencentSMSSender{result: &sms.SendSmsResponse{Response: &sms.SendSmsResponseParams{SendStatusSet: []*sms.SendStatus{{Code: common.StringPtr("Ok")}}}}}
	p.client = fake
	for purpose, want := range map[string]string{SMSPurposeLogin: "101", SMSPurposeRegister: "102", SMSPurposeChangePassword: "103", SMSPurposeChangePhone: "104"} {
		if err := p.SendForPurpose(context.Background(), "+8613800000000", "123456", uuid.NewString(), purpose); err != nil || *fake.request.TemplateId != want {
			t.Fatalf("purpose %s did not select its own template: %v", purpose, err)
		}
	}
	if err := p.SendForPurpose(context.Background(), "+8613800000000", "123456", uuid.NewString(), "UNKNOWN"); err == nil || fake.calls != 4 {
		t.Fatal("unknown purpose sent a message")
	}
	delete(templates, "change_phone")
	if _, err := NewTencentSMSProviderWithTemplates("id", "key", "1400006666", "安芯伴", templates); err == nil {
		t.Fatal("missing purpose silently fell back to another template")
	}
}

func TestTencentSMSRegistrationIncludesConfiguredExpiryParameter(t *testing.T) {
	templates := map[string]string{"login": "101", "register": "102", "change_password": "103", "change_phone": "104"}
	provider, err := NewTencentSMSProviderWithTemplates("id", "key", "1400006666", "安芯伴", templates, map[string][]string{"register": {"code", "expires_minutes"}})
	if err != nil {
		t.Fatal(err)
	}
	p := provider.(*TencentSMSProvider)
	fake := &fakeTencentSMSSender{result: &sms.SendSmsResponse{Response: &sms.SendSmsResponseParams{SendStatusSet: []*sms.SendStatus{{Code: common.StringPtr("Ok")}}}}}
	p.client = fake
	if err := p.SendForPurpose(context.Background(), "+8613800000000", "123456", uuid.NewString(), SMSPurposeRegister); err != nil {
		t.Fatal(err)
	}
	params := fake.request.TemplateParamSet
	if len(params) != 2 || *params[0] != "123456" || *params[1] != "5" {
		t.Fatal("registration template must receive code followed by its real expiry in minutes")
	}
	if err := p.Send(context.Background(), "+8613800000000", "123456", uuid.NewString()); err != nil || len(fake.request.TemplateParamSet) != 1 {
		t.Fatal("registration parameters leaked into login template")
	}
	for _, params := range [][]string{{}, {"expires_minutes"}, {"code", "unknown"}, {"code", "code"}} {
		if _, err := NewTencentSMSProviderWithTemplates("id", "key", "1400006666", "安芯伴", templates, map[string][]string{"register": params}); err == nil {
			t.Fatal("invalid parameters accepted")
		}
	}
}