package controllers

import (
	"context"
	"encoding/json"
	"testing"

	"github.com/getAlby/go-nostr"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/getAlby/hub/constants"
	"github.com/getAlby/hub/db"
	"github.com/getAlby/hub/nip47/models"
	"github.com/getAlby/hub/tests"
	"github.com/getAlby/hub/transactions"
)

const nip47PayInvoiceJson = `
{
	"method": "pay_invoice",
	"params": {
		"invoice": "lntbs1230n1pnkqautdqyw3jsnp4q09a0z84kg4a2m38zjllw43h953fx5zvqe8qxfgw694ymkq26u8zcpp5yvnh6hsnlnj4xnuh2trzlnunx732dv8ta2wjr75pdfxf6p2vlyassp5hyeg97a3ft5u769kjwsn7p0e85h79pzz8kladmnqhpcypz2uawjs9qyysgqcqpcxq8zals8sq9yeg2pa9eywkgj50cyzxd5elatujuc0c0wh6j9nat5mn34pgk8u9ufpgs99tw9ldlfk42cqlkr48au3lmuh09269prg4qkggh4a8cyqpfl0y6j",
		"metadata": {"a": 123}
	}
}
`
const nip47PayInvoiceZeroAmountJson = `
{
	"method": "pay_invoice",
	"params": {
		"invoice": "` + tests.MockZeroAmountInvoice + `",
		"amount": 1234
	}
}
`

const nip47PayJsonNoInvoice = `
{
	"method": "pay_invoice",
	"params": {
		"something": "else"
	}
}
`

const nip47PayJsonExpiredInvoice = `
{
	"method": "pay_invoice",
	"params": {
		"invoice": "lntb1230n1pjypux0pp5xgxzcks5jtx06k784f9dndjh664wc08ucrganpqn52d0ftrh9n8sdqyw3jscqzpgxqyz5vqsp5rkx7cq252p3frx8ytjpzc55rkgyx2mfkzzraa272dqvr2j6leurs9qyyssqhutxa24r5hqxstchz5fxlslawprqjnarjujp5sm3xj7ex73s32sn54fthv2aqlhp76qmvrlvxppx9skd3r5ut5xutgrup8zuc6ay73gqmra29m"
	}
}
`

func TestHandlePayInvoiceEvent(t *testing.T) {
	ctx := context.TODO()
	svc, err := tests.CreateTestService(t)
	require.NoError(t, err)
	defer svc.Remove()

	app, _, err := tests.CreateApp(svc)
	assert.NoError(t, err)

	appPermission := &db.AppPermission{
		AppId: app.ID,
		App:   *app,
		Scope: constants.PAY_INVOICE_SCOPE,
	}
	err = svc.DB.Create(appPermission).Error
	assert.NoError(t, err)

	nip47Request := &models.Request{}
	err = json.Unmarshal([]byte(nip47PayInvoiceJson), nip47Request)
	assert.NoError(t, err)

	dbRequestEvent := &db.RequestEvent{}
	err = svc.DB.Create(&dbRequestEvent).Error
	assert.NoError(t, err)

	var publishedResponse *models.Response

	publishResponse := func(response *models.Response, tags nostr.Tags) {
		publishedResponse = response
	}

	NewTestNip47Controller(svc).
		HandlePayInvoiceEvent(ctx, nip47Request, dbRequestEvent.ID, app, publishResponse, nostr.Tags{})

	assert.Equal(t, "123preimage", publishedResponse.Result.(payResponse).Preimage)

	transactionType := constants.TRANSACTION_TYPE_OUTGOING
	transactionsSvc := transactions.NewTransactionsService(svc.DB, svc.EventPublisher)
	transaction, err := transactionsSvc.LookupTransaction(ctx, "23277d5e13fce5534f9752c62fcf9337a2a6b0ebea9d21fa816a4c9d054cf93b", &transactionType, svc.LNClient, &app.ID)
	assert.NoError(t, err)

	type dummyMetadata struct {
		A int `json:"a"`
	}
	var decodedMetadata dummyMetadata
	err = json.Unmarshal(transaction.Metadata, &decodedMetadata)
	assert.NoError(t, err)
	assert.Equal(t, 123, decodedMetadata.A)
}

func TestHandlePayInvoiceEvent_ZeroAmount(t *testing.T) {
	ctx := context.TODO()
	svc, err := tests.CreateTestService(t)
	require.NoError(t, err)
	defer svc.Remove()

	app, _, err := tests.CreateApp(svc)
	assert.NoError(t, err)

	appPermission := &db.AppPermission{
		AppId: app.ID,
		App:   *app,
		Scope: constants.PAY_INVOICE_SCOPE,
	}
	err = svc.DB.Create(appPermission).Error
	assert.NoError(t, err)

	nip47Request := &models.Request{}
	err = json.Unmarshal([]byte(nip47PayInvoiceZeroAmountJson), nip47Request)
	assert.NoError(t, err)

	dbRequestEvent := &db.RequestEvent{}
	err = svc.DB.Create(&dbRequestEvent).Error
	assert.NoError(t, err)

	var publishedResponse *models.Response

	publishResponse := func(response *models.Response, tags nostr.Tags) {
		publishedResponse = response
	}

	NewTestNip47Controller(svc).
		HandlePayInvoiceEvent(ctx, nip47Request, dbRequestEvent.ID, app, publishResponse, nostr.Tags{})

	assert.Equal(t, "123preimage", publishedResponse.Result.(payResponse).Preimage)

	transactionType := constants.TRANSACTION_TYPE_OUTGOING
	transactionsSvc := transactions.NewTransactionsService(svc.DB, svc.EventPublisher)
	transaction, err := transactionsSvc.LookupTransaction(ctx, tests.MockZeroAmountPaymentHash, &transactionType, svc.LNClient, &app.ID)
	assert.NoError(t, err)
	// from the request amount
	assert.Equal(t, uint64(1234), transaction.AmountMsat)
}

func TestHandlePayInvoiceEvent_MalformedInvoice(t *testing.T) {
	ctx := context.TODO()
	svc, err := tests.CreateTestService(t)
	require.NoError(t, err)
	defer svc.Remove()

	app, _, err := tests.CreateApp(svc)
	assert.NoError(t, err)

	appPermission := &db.AppPermission{
		AppId: app.ID,
		App:   *app,
		Scope: constants.PAY_INVOICE_SCOPE,
	}
	err = svc.DB.Create(appPermission).Error
	assert.NoError(t, err)

	nip47Request := &models.Request{}
	err = json.Unmarshal([]byte(nip47PayJsonNoInvoice), nip47Request)
	assert.NoError(t, err)

	dbRequestEvent := &db.RequestEvent{}
	err = svc.DB.Create(&dbRequestEvent).Error
	assert.NoError(t, err)

	var publishedResponse *models.Response

	publishResponse := func(response *models.Response, tags nostr.Tags) {
		publishedResponse = response
	}

	NewTestNip47Controller(svc).
		HandlePayInvoiceEvent(ctx, nip47Request, dbRequestEvent.ID, app, publishResponse, nostr.Tags{})

	assert.Nil(t, publishedResponse.Result)
	assert.Equal(t, constants.ERROR_BAD_REQUEST, publishedResponse.Error.Code)
	assert.Equal(t, "Failed to decode bolt11 invoice: bolt11 too short", publishedResponse.Error.Message)
}

func TestHandlePayInvoiceEvent_ExpiredInvoice(t *testing.T) {
	ctx := context.TODO()
	svc, err := tests.CreateTestService(t)
	require.NoError(t, err)
	defer svc.Remove()

	app, _, err := tests.CreateApp(svc)
	assert.NoError(t, err)

	appPermission := &db.AppPermission{
		AppId: app.ID,
		App:   *app,
		Scope: constants.PAY_INVOICE_SCOPE,
	}
	err = svc.DB.Create(appPermission).Error
	assert.NoError(t, err)

	nip47Request := &models.Request{}
	err = json.Unmarshal([]byte(nip47PayJsonExpiredInvoice), nip47Request)
	assert.NoError(t, err)

	dbRequestEvent := &db.RequestEvent{}
	err = svc.DB.Create(&dbRequestEvent).Error
	assert.NoError(t, err)

	var publishedResponse *models.Response

	publishResponse := func(response *models.Response, tags nostr.Tags) {
		publishedResponse = response
	}

	NewTestNip47Controller(svc).
		HandlePayInvoiceEvent(ctx, nip47Request, dbRequestEvent.ID, app, publishResponse, nostr.Tags{})

	assert.Nil(t, publishedResponse.Result)
	assert.Equal(t, constants.ERROR_INTERNAL, publishedResponse.Error.Code)
	assert.Equal(t, "this invoice has expired", publishedResponse.Error.Message)
}