// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package internal

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

	"github.com/matrix-org/dendrite/federationapi/producers"
	rsAPI "github.com/matrix-org/dendrite/roomserver/api"
	"github.com/matrix-org/dendrite/setup/config"
	"github.com/matrix-org/dendrite/setup/jetstream"
	"github.com/matrix-org/dendrite/setup/process"
	"github.com/matrix-org/dendrite/test"
	"github.com/matrix-org/gomatrixserverlib"
	"github.com/stretchr/testify/assert"
)

var (
	testData = []json.RawMessage{
		[]byte(`{"auth_events":[],"content":{"creator":"@userid:kaer.morhen"},"depth":0,"event_id":"$0ok8ynDp7kjc95e3:kaer.morhen","hashes":{"sha256":"17kPoH+h0Dk4Omn7Sus0qMb6+oGcf+CZFEgDhv7UKWs"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[],"prev_state":[],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"jP4a04f5/F10Pw95FPpdCyKAO44JOwUQ/MZOOeA/RTU1Dn+AHPMzGSaZnuGjRr/xQuADt+I3ctb5ZQfLKNzHDw"}},"state_key":"","type":"m.room.create"}`),
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}]],"content":{"membership":"join"},"depth":1,"event_id":"$LEwEu0kxrtu5fOiS:kaer.morhen","hashes":{"sha256":"B7M88PhXf3vd1LaFtjQutFu4x/w7fHD28XKZ4sAsJTo"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}]],"prev_state":[],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"p2vqmuJn7ZBRImctSaKbXCAxCcBlIjPH9JHte1ouIUGy84gpu4eLipOvSBCLL26hXfC0Zrm4WUto6Hr+ohdrCg"}},"state_key":"@userid:kaer.morhen","type":"m.room.member"}`),
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}],["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"content":{"join_rule":"public"},"depth":2,"event_id":"$SMHlqUrNhhBBRLeN:kaer.morhen","hashes":{"sha256":"vIuJQvmMjrGxshAkj1SXe0C4RqvMbv4ZADDw9pFCWqQ"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"prev_state":[],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"hBMsb3Qppo3RaqqAl4JyTgaiWEbW5hlckATky6PrHun+F3YM203TzG7w9clwuQU5F5pZoB1a6nw+to0hN90FAw"}},"state_key":"","type":"m.room.join_rules"}`),
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}],["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"content":{"history_visibility":"shared"},"depth":3,"event_id":"$6F1yGIbO0J7TM93h:kaer.morhen","hashes":{"sha256":"Mr23GKSlZW7UCCYLgOWawI2Sg6KIoMjUWO2TDenuOgw"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$SMHlqUrNhhBBRLeN:kaer.morhen",{"sha256":"SylzE8U02I+6eyEHgL+FlU0L5YdqrVp8OOlxKS9VQW0"}]],"prev_state":[],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"sHLKrFI3hKGrEJfpMVZSDS3LvLasQsy50CTsOwru9XTVxgRsPo6wozNtRVjxo1J3Rk18RC9JppovmQ5VR5EcDw"}},"state_key":"","type":"m.room.history_visibility"}`),
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}],["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"content":{"ban":50,"events":null,"events_default":0,"invite":0,"kick":50,"redact":50,"state_default":50,"users":null,"users_default":0},"depth":4,"event_id":"$UKNe10XzYzG0TeA9:kaer.morhen","hashes":{"sha256":"ngbP3yja9U5dlckKerUs/fSOhtKxZMCVvsfhPURSS28"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$6F1yGIbO0J7TM93h:kaer.morhen",{"sha256":"A4CucrKSoWX4IaJXhq02mBg1sxIyZEftbC+5p3fZAvk"}]],"prev_state":[],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"zOmwlP01QL3yFchzuR9WHvogOoBZA3oVtNIF3lM0ZfDnqlSYZB9sns27G/4HVq0k7alaK7ZE3oGoCrVnMkPNCw"}},"state_key":"","type":"m.room.power_levels"}`),
		// messages
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}],["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"content":{"body":"Test Message"},"depth":5,"event_id":"$gl2T9l3qm0kUbiIJ:kaer.morhen","hashes":{"sha256":"Qx3nRMHLDPSL5hBAzuX84FiSSP0K0Kju2iFoBWH4Za8"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$UKNe10XzYzG0TeA9:kaer.morhen",{"sha256":"KtSRyMjt0ZSjsv2koixTRCxIRCGoOp6QrKscsW97XRo"}]],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"sqDgv3EG7ml5VREzmT9aZeBpS4gAPNIaIeJOwqjDhY0GPU/BcpX5wY4R7hYLrNe5cChgV+eFy/GWm1Zfg5FfDg"}},"type":"m.room.message"}`),
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}],["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"content":{"body":"Test Message"},"depth":6,"event_id":"$MYSbs8m4rEbsCWXD:kaer.morhen","hashes":{"sha256":"kgbYM7v4Ud2YaBsjBTolM4ySg6rHcJNYI6nWhMSdFUA"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$gl2T9l3qm0kUbiIJ:kaer.morhen",{"sha256":"C/rD04h9wGxRdN2G/IBfrgoE1UovzLZ+uskwaKZ37/Q"}]],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"x0UoKh968jj/F5l1/R7Ew0T6CTKuew3PLNHASNxqck/bkNe8yYQiDHXRr+kZxObeqPZZTpaF1+EI+bLU9W8GDQ"}},"type":"m.room.message"}`),
		[]byte(`{"auth_events":[["$0ok8ynDp7kjc95e3:kaer.morhen",{"sha256":"sWCi6Ckp9rDimQON+MrUlNRkyfZ2tjbPbWfg2NMB18Q"}],["$LEwEu0kxrtu5fOiS:kaer.morhen",{"sha256":"1aKajq6DWHru1R1HJjvdWMEavkJJHGaTmPvfuERUXaA"}]],"content":{"body":"Test Message"},"depth":7,"event_id":"$N5x9WJkl9ClPrAEg:kaer.morhen","hashes":{"sha256":"FWM8oz4yquTunRZ67qlW2gzPDzdWfBP6RPHXhK1I/x8"},"origin":"kaer.morhen","origin_server_ts":0,"prev_events":[["$MYSbs8m4rEbsCWXD:kaer.morhen",{"sha256":"fatqgW+SE8mb2wFn3UN+drmluoD4UJ/EcSrL6Ur9q1M"}]],"room_id":"!roomid:kaer.morhen","sender":"@userid:kaer.morhen","signatures":{"kaer.morhen":{"ed25519:auto":"Y+LX/xcyufoXMOIoqQBNOzy6lZfUGB1ffgXIrSugk6obMiyAsiRejHQN/pciZXsHKxMJLYRFAz4zSJoS/LGPAA"}},"type":"m.room.message"}`),
		[]byte(`{"auth_events":["$x4MKEPRSF6OGlo0qpnsP3BfSmYX5HhVlykOsQH3ECyg","$BcEcbZnlFLB5rxSNSZNBn6fO3jU/TKAJ79wfKyCQLiU"],"content":{"body":"Test Message"},"depth":3917,"hashes":{"sha256":"cNAWtlHIegrji0mMA6x1rhpYCccY8W1NsWZqSpJFhjs"},"origin":"localhost","origin_server_ts":0,"prev_events":["$4GDB0bVjkWwS3G4noUZCq5oLWzpBYpwzdMcf7gj24CI"],"room_id":"!roomid:localhost","sender":"@userid:localhost","signatures":{"localhost":{"ed25519:auto":"NKym6Kcy3u9mGUr21Hjfe3h7DfDilDhN5PqztT0QZ4NTZ+8Y7owseLolQVXp+TvNjecvzdDywsXXVvGiuQiWAQ"}},"type":"m.room.message"}`),
	}
)

type FakeRsAPI struct {
	rsAPI.RoomserverInternalAPI
}

func (r *FakeRsAPI) QueryRoomVersionForRoom(
	ctx context.Context,
	req *rsAPI.QueryRoomVersionForRoomRequest,
	res *rsAPI.QueryRoomVersionForRoomResponse,
) error {
	res.RoomVersion = gomatrixserverlib.RoomVersionV10
	return nil
}

func (r *FakeRsAPI) IsServerBannedFromRoom(
	ctx context.Context,
	rsAPI rsAPI.FederationRoomserverAPI,
	roomID string,
	serverName gomatrixserverlib.ServerName,
) bool {
	return false
}

func (r *FakeRsAPI) QueryServerBannedFromRoom(
	ctx context.Context,
	req *rsAPI.QueryServerBannedFromRoomRequest,
	res *rsAPI.QueryServerBannedFromRoomResponse,
) error {
	res.Banned = false
	return nil
}

func (r *FakeRsAPI) InputRoomEvents(
	ctx context.Context,
	req *rsAPI.InputRoomEventsRequest,
	res *rsAPI.InputRoomEventsResponse,
) error {
	return nil
}

func TestEmptyTransactionRequest(t *testing.T) {
	txn := NewTxnReq(&FakeRsAPI{}, nil, "", nil, nil, nil, false, []json.RawMessage{}, []gomatrixserverlib.EDU{}, "", "", "")
	txnRes, jsonRes := txn.ProcessTransaction(context.Background())

	assert.Nil(t, jsonRes)
	assert.Zero(t, len(txnRes.PDUs))
}

func TestProcessTransactionRequestPDU(t *testing.T) {
	txn := NewTxnReq(&FakeRsAPI{}, nil, "", nil, nil, nil, false, []json.RawMessage{testData[0]}, []gomatrixserverlib.EDU{}, "", "", "")
	txnRes, jsonRes := txn.ProcessTransaction(context.Background())

	assert.Nil(t, jsonRes)
	assert.Zero(t, len(txnRes.PDUs))
}

func TestProcessTransactionRequestPDUs(t *testing.T) {
	keyRing := &test.NopJSONVerifier{}
	txn := NewTxnReq(&FakeRsAPI{}, nil, "", keyRing, nil, nil, false, testData, []gomatrixserverlib.EDU{}, "", "", "")
	txnRes, jsonRes := txn.ProcessTransaction(context.Background())

	assert.Nil(t, jsonRes)
	assert.Equal(t, 1, len(txnRes.PDUs))
}

func TestProcessTransactionRequestEDU(t *testing.T) {
	var err error
	edu := gomatrixserverlib.EDU{Type: "m.typing"}
	if edu.Content, err = json.Marshal(map[string]interface{}{
		"room_id": "!roomid:kaer.morhen",
		"user_id": "@userid:kaer.morhen",
		"typing":  true,
	}); err != nil {
		t.Errorf("failed to marshal EDU JSON")
	}

	cfg := &config.Dendrite{}
	cfg.Defaults(config.DefaultOpts{
		Generate:   true,
		Monolithic: true,
	})
	nats := &jetstream.NATSInstance{}
	js, _ := nats.Prepare(process.NewProcessContext(), &cfg.Global.JetStream)
	producer := &producers.SyncAPIProducer{
		JetStream:              js,
		TopicReceiptEvent:      "OutputReceiptEvent",
		TopicSendToDeviceEvent: "OutputSendToDeviceEvent",
		TopicTypingEvent:       "OutputTypingEvent",
		TopicPresenceEvent:     "OutputPresenceEvent",
		TopicDeviceListUpdate:  "InputDeviceListUpdate",
		TopicSigningKeyUpdate:  "InputSigningKeyUpdate",
		Config:                 &cfg.FederationAPI,
		UserAPI:                nil,
	}
	txn := NewTxnReq(&FakeRsAPI{}, nil, "", nil, nil, producer, false, []json.RawMessage{}, []gomatrixserverlib.EDU{edu}, "", "", "")
	txnRes, jsonRes := txn.ProcessTransaction(context.Background())

	assert.Nil(t, jsonRes)
	assert.Zero(t, len(txnRes.PDUs))
}