/*
 * Copyright 2021 PingCAP, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package event

import (
	"testing"

	"github.com/pingcap/errors"
	"github.com/pingcap/mimir/pkg/event/event_bus"
	"github.com/stretchr/testify/require"
)

type TestTableCheckerSubscriber struct {
	expect *ExpectValue
}

type ExpectValue struct {
	addEvent    int
	deleteEvent int

	tableName string
	schedule  string
}

func (tcs *TestTableCheckerSubscriber) SubscribeAddSink(event AddSinkEvent) error {
	tcs.expect.addEvent++
	tcs.expect.tableName = event.TableName
	tcs.expect.schedule = event.Schedule
	return nil
}

func (tcs *TestTableCheckerSubscriber) SubscribeUpdateSink(event UpdateSinkEvent) error {
	return errors.New("Test")
}

func (tcs *TestTableCheckerSubscriber) SubscribeDeleteSink(event DeleteSinkEvent) error {
	tcs.expect.deleteEvent++
	tcs.expect.tableName = event.TableName
	return nil
}

func TestSubscriberWithNormal(t *testing.T) {
	assert := require.New(t)

	expectValue := &ExpectValue{}
	event_bus.EventBus.Register(&TestTableCheckerSubscriber{
		expect: expectValue,
	})

	err := event_bus.EventBus.PostSync(AddSinkEvent{
		TableName: "test",
		Schedule:  "*/1 * * * *",
	})
	assert.Nil(err)
	assert.Equal(expectValue.addEvent, 1)
	assert.Equal(expectValue.tableName, "test")
	assert.Equal(expectValue.schedule, "*/1 * * * *")

	err = event_bus.EventBus.PostSync(UpdateSinkEvent{
		TableName: "test",
		Schedule:  "*/1 * * * *",
	})
	assert.Equal(err.Error(), "Test")

	err = event_bus.EventBus.PostSync(DeleteSinkEvent{
		TableName: "deletetest",
	})
	assert.Nil(err)
	assert.Equal(expectValue.deleteEvent, 1)
	assert.Equal(expectValue.tableName, "deletetest")

}