// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

package app

import (
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/mattermost/mattermost-server/model"
)

func TestUpdatePostEditAt(t *testing.T) {
	th := Setup().InitBasic()
	defer th.TearDown()

	post := &model.Post{}
	*post = *th.BasicPost

	post.IsPinned = true
	if saved, err := th.App.UpdatePost(post, true); err != nil {
		t.Fatal(err)
	} else if saved.EditAt != post.EditAt {
		t.Fatal("shouldn't have updated post.EditAt when pinning post")

		*post = *saved
	}

	time.Sleep(time.Millisecond * 100)

	post.Message = model.NewId()
	if saved, err := th.App.UpdatePost(post, true); err != nil {
		t.Fatal(err)
	} else if saved.EditAt == post.EditAt {
		t.Fatal("should have updated post.EditAt when updating post message")
	}
}

func TestPostReplyToPostWhereRootPosterLeftChannel(t *testing.T) {
	// This test ensures that when replying to a root post made by a user who has since left the channel, the reply
	// post completes successfully. This is a regression test for PLT-6523.
	th := Setup().InitBasic()
	defer th.TearDown()

	channel := th.BasicChannel
	userInChannel := th.BasicUser2
	userNotInChannel := th.BasicUser
	rootPost := th.BasicPost

	if _, err := th.App.AddUserToChannel(userInChannel, channel); err != nil {
		t.Fatal(err)
	}

	if err := th.App.RemoveUserFromChannel(userNotInChannel.Id, "", channel); err != nil {
		t.Fatal(err)
	}

	replyPost := model.Post{
		Message:       "asd",
		ChannelId:     channel.Id,
		RootId:        rootPost.Id,
		ParentId:      rootPost.Id,
		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
		UserId:        userInChannel.Id,
		CreateAt:      0,
	}

	if _, err := th.App.CreatePostAsUser(&replyPost); err != nil {
		t.Fatal(err)
	}
}

func TestPostAction(t *testing.T) {
	th := Setup().InitBasic()
	defer th.TearDown()

	th.App.UpdateConfig(func(cfg *model.Config) {
		*cfg.ServiceSettings.AllowedUntrustedInternalConnections = "localhost 127.0.0.1"
	})

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var request model.PostActionIntegrationRequest
		err := json.NewDecoder(r.Body).Decode(&request)
		assert.NoError(t, err)
		assert.Equal(t, request.UserId, th.BasicUser.Id)
		assert.Equal(t, "foo", request.Context["s"])
		assert.EqualValues(t, 3, request.Context["n"])
		fmt.Fprintf(w, `{"update": {"message": "updated"}, "ephemeral_text": "foo"}`)
	}))
	defer ts.Close()

	interactivePost := model.Post{
		Message:       "Interactive post",
		ChannelId:     th.BasicChannel.Id,
		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
		UserId:        th.BasicUser.Id,
		Props: model.StringInterface{
			"attachments": []*model.SlackAttachment{
				{
					Text: "hello",
					Actions: []*model.PostAction{
						{
							Integration: &model.PostActionIntegration{
								Context: model.StringInterface{
									"s": "foo",
									"n": 3,
								},
								URL: ts.URL,
							},
							Name: "action",
						},
					},
				},
			},
		},
	}

	post, err := th.App.CreatePostAsUser(&interactivePost)
	require.Nil(t, err)

	attachments, ok := post.Props["attachments"].([]*model.SlackAttachment)
	require.True(t, ok)

	require.NotEmpty(t, attachments[0].Actions)
	require.NotEmpty(t, attachments[0].Actions[0].Id)

	err = th.App.DoPostAction(post.Id, "notavalidid", th.BasicUser.Id)
	require.NotNil(t, err)
	assert.Equal(t, http.StatusNotFound, err.StatusCode)

	err = th.App.DoPostAction(post.Id, attachments[0].Actions[0].Id, th.BasicUser.Id)
	require.Nil(t, err)
}

func TestPostChannelMentions(t *testing.T) {
	th := Setup().InitBasic()
	defer th.TearDown()

	channel := th.BasicChannel
	user := th.BasicUser

	channelToMention, err := th.App.CreateChannel(&model.Channel{
		DisplayName: "Mention Test",
		Name:        "mention-test",
		Type:        model.CHANNEL_OPEN,
		TeamId:      th.BasicTeam.Id,
	}, false)
	if err != nil {
		t.Fatal(err.Error())
	}
	defer th.App.PermanentDeleteChannel(channelToMention)

	_, err = th.App.AddUserToChannel(user, channel)
	require.Nil(t, err)

	post := &model.Post{
		Message:       fmt.Sprintf("hello, ~%v!", channelToMention.Name),
		ChannelId:     channel.Id,
		PendingPostId: model.NewId() + ":" + fmt.Sprint(model.GetMillis()),
		UserId:        user.Id,
		CreateAt:      0,
	}

	result, err := th.App.CreatePostAsUser(post)
	require.Nil(t, err)
	assert.Equal(t, map[string]interface{}{
		"mention-test": map[string]interface{}{
			"display_name": "Mention Test",
		},
	}, result.Props["channel_mentions"])

	post.Message = fmt.Sprintf("goodbye, ~%v!", channelToMention.Name)
	result, err = th.App.UpdatePost(post, false)
	require.Nil(t, err)
	assert.Equal(t, map[string]interface{}{
		"mention-test": map[string]interface{}{
			"display_name": "Mention Test",
		},
	}, result.Props["channel_mentions"])
}