// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package api4

import (
	"context"
	"testing"
	"time"

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

	"github.com/mattermost/mattermost/server/public/model"
	"github.com/mattermost/mattermost/server/v8/channels/utils/testutils"
)

func TestUpsertDraft(t *testing.T) {
	mainHelper.Parallel(t)

	th := Setup(t).InitBasic()
	defer th.TearDown()

	// set config
	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.AllowSyncedDrafts = true })

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

	draft := &model.Draft{
		CreateAt:  12345,
		UpdateAt:  12345,
		UserId:    user.Id,
		ChannelId: channel.Id,
		Message:   "original",
	}

	// try to upsert draft
	draftResp, _, err := client.UpsertDraft(context.Background(), draft)
	require.NoError(t, err)

	assert.Equal(t, draft.UserId, draftResp.UserId)
	assert.Equal(t, draft.Message, draftResp.Message)
	assert.Equal(t, draft.ChannelId, draftResp.ChannelId)

	// upload file
	sent, err := testutils.ReadTestFile("test.png")
	require.NoError(t, err)

	fileResp, _, err := client.UploadFile(context.Background(), sent, channel.Id, "test.png")
	require.NoError(t, err)

	draftWithFiles := draft
	draftWithFiles.FileIds = []string{fileResp.FileInfos[0].Id}

	// try to upsert draft with file
	draftResp, _, err = client.UpsertDraft(context.Background(), draftWithFiles)
	require.NoError(t, err)

	assert.Equal(t, draftWithFiles.UserId, draftResp.UserId)
	assert.Equal(t, draftWithFiles.Message, draftResp.Message)
	assert.Equal(t, draftWithFiles.ChannelId, draftResp.ChannelId)
	assert.ElementsMatch(t, draftWithFiles.FileIds, draftResp.FileIds)

	// try to upsert draft for invalid channel
	draftInvalidChannel := draft
	draftInvalidChannel.ChannelId = "12345"

	_, resp, err := client.UpsertDraft(context.Background(), draft)
	require.Error(t, err)
	CheckForbiddenStatus(t, resp)

	// try to upsert draft without config setting set to true
	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.AllowSyncedDrafts = false })

	_, resp, err = client.UpsertDraft(context.Background(), draft)
	require.Error(t, err)
	CheckNotImplementedStatus(t, resp)
}

func TestGetDrafts(t *testing.T) {
	mainHelper.Parallel(t)

	th := Setup(t).InitBasic()
	defer th.TearDown()

	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.AllowSyncedDrafts = true })

	client := th.Client
	channel1 := th.BasicChannel
	channel2 := th.BasicChannel2
	user := th.BasicUser
	team := th.BasicTeam

	draft1 := &model.Draft{
		CreateAt:  00001,
		UserId:    user.Id,
		ChannelId: channel1.Id,
		Message:   "draft1",
	}

	draft2 := &model.Draft{
		CreateAt:  11111,
		UserId:    user.Id,
		ChannelId: channel2.Id,
		Message:   "draft2",
	}

	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.AllowSyncedDrafts = true })

	// upsert draft1
	_, _, err := client.UpsertDraft(context.Background(), draft1)
	require.NoError(t, err)

	// Wait a bit so the second draft gets a newer UpdateAt
	time.Sleep(100 * time.Millisecond)

	// upsert draft2
	_, _, err = client.UpsertDraft(context.Background(), draft2)
	require.NoError(t, err)

	// try to get drafts
	draftResp, _, err := client.GetDrafts(context.Background(), user.Id, team.Id)
	require.NoError(t, err)

	assert.Equal(t, draft2.UserId, draftResp[0].UserId)
	assert.Equal(t, draft2.Message, draftResp[0].Message)
	assert.Equal(t, draft2.ChannelId, draftResp[0].ChannelId)

	assert.Equal(t, draft1.UserId, draftResp[1].UserId)
	assert.Equal(t, draft1.Message, draftResp[1].Message)
	assert.Equal(t, draft1.ChannelId, draftResp[1].ChannelId)

	assert.Len(t, draftResp, 2)

	// try to get drafts on invalid team
	_, resp, err := client.GetDrafts(context.Background(), user.Id, "12345")
	require.Error(t, err)
	CheckForbiddenStatus(t, resp)

	// try to get drafts when config is turned off
	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.AllowSyncedDrafts = false })
	_, resp, err = client.GetDrafts(context.Background(), user.Id, team.Id)
	require.Error(t, err)
	CheckNotImplementedStatus(t, resp)
}

func TestDeleteDraft(t *testing.T) {
	mainHelper.Parallel(t)

	th := Setup(t).InitBasic()
	defer th.TearDown()

	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.ServiceSettings.AllowSyncedDrafts = true })

	client := th.Client
	channel1 := th.BasicChannel
	channel2 := th.BasicChannel2
	user := th.BasicUser
	team := th.BasicTeam

	draft1 := &model.Draft{
		CreateAt:  00001,
		UserId:    user.Id,
		ChannelId: channel1.Id,
		Message:   "draft1",
		RootId:    "",
	}

	draft2 := &model.Draft{
		CreateAt:  11111,
		UserId:    user.Id,
		ChannelId: channel2.Id,
		Message:   "draft2",
		RootId:    model.NewId(),
	}

	// upsert draft1
	_, _, err := client.UpsertDraft(context.Background(), draft1)
	require.NoError(t, err)

	// Wait a bit so the second draft gets a newer UpdateAt
	time.Sleep(100 * time.Millisecond)

	// upsert draft2
	_, _, err = client.UpsertDraft(context.Background(), draft2)
	require.NoError(t, err)

	// get drafts
	draftResp, _, err := client.GetDrafts(context.Background(), user.Id, team.Id)
	require.NoError(t, err)

	assert.Equal(t, draft2.UserId, draftResp[0].UserId)
	assert.Equal(t, draft2.Message, draftResp[0].Message)
	assert.Equal(t, draft2.ChannelId, draftResp[0].ChannelId)

	assert.Equal(t, draft1.UserId, draftResp[1].UserId)
	assert.Equal(t, draft1.Message, draftResp[1].Message)
	assert.Equal(t, draft1.ChannelId, draftResp[1].ChannelId)

	// try to delete draft1
	_, _, err = client.DeleteDraft(context.Background(), user.Id, channel1.Id, draft1.RootId)
	require.NoError(t, err)

	// get drafts
	draftResp, _, err = client.GetDrafts(context.Background(), user.Id, team.Id)
	require.NoError(t, err)

	assert.Equal(t, draft2.UserId, draftResp[0].UserId)
	assert.Equal(t, draft2.Message, draftResp[0].Message)
	assert.Equal(t, draft2.ChannelId, draftResp[0].ChannelId)
	assert.Len(t, draftResp, 1)
}