// Vikunja is a to-do list application to facilitate your life.
// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public Licensee as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public Licensee for more details.
//
// You should have received a copy of the GNU Affero General Public Licensee
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package todoist

import (
	"os"
	"strconv"
	"testing"
	"time"

	"code.vikunja.io/api/pkg/config"
	"code.vikunja.io/api/pkg/files"
	"code.vikunja.io/api/pkg/models"
	"github.com/stretchr/testify/assert"
	"gopkg.in/d4l3k/messagediff.v1"
)

func TestConvertTodoistToVikunja(t *testing.T) {

	config.InitConfig()

	time1, err := time.Parse(time.RFC3339Nano, "2014-09-26T08:25:05Z")
	assert.NoError(t, err)
	time1 = time1.In(config.GetTimeZone())
	time3, err := time.Parse(time.RFC3339Nano, "2014-10-21T08:25:05Z")
	assert.NoError(t, err)
	time3 = time3.In(config.GetTimeZone())
	dueTime, err := time.Parse(time.RFC3339Nano, "2020-05-31T23:59:00Z")
	assert.NoError(t, err)
	dueTime = dueTime.In(config.GetTimeZone())
	dueTimeWithTime, err := time.Parse(time.RFC3339Nano, "2021-01-31T19:00:00Z")
	assert.NoError(t, err)
	dueTimeWithTime = dueTimeWithTime.In(config.GetTimeZone())
	nilTime, err := time.Parse(time.RFC3339Nano, "0001-01-01T00:00:00Z")
	assert.NoError(t, err)
	exampleFile, err := os.ReadFile(config.ServiceRootpath.GetString() + "/pkg/modules/migration/wunderlist/testimage.jpg")
	assert.NoError(t, err)

	makeTestItem := func(id, projectId int64, hasDueDate, hasLabels, done bool) *item {
		item := &item{
			ID:            id,
			UserID:        1855589,
			ProjectID:     projectId,
			Content:       "Task" + strconv.FormatInt(id, 10),
			Priority:      1,
			ParentID:      0,
			ChildOrder:    1,
			DateAdded:     time1,
			DateCompleted: nilTime,
		}

		if done {
			item.Checked = 1
			item.DateCompleted = time3
		}

		if hasLabels {
			item.Labels = []int64{
				80000,
				80001,
				80002,
				80003,
			}
		}

		if hasDueDate {
			item.Due = &dueDate{
				Date:        "2020-05-31",
				Timezone:    nil,
				IsRecurring: false,
			}
		}

		return item
	}

	testSync := &sync{
		Projects: []*project{
			{
				ID:         396936926,
				Name:       "Project1",
				Color:      30,
				ChildOrder: 1,
				Collapsed:  0,
				Shared:     false,
				IsDeleted:  0,
				IsArchived: 0,
				IsFavorite: 0,
			},
			{
				ID:         396936927,
				Name:       "Project2",
				Color:      37,
				ChildOrder: 1,
				Collapsed:  0,
				Shared:     false,
				IsDeleted:  0,
				IsArchived: 0,
				IsFavorite: 0,
			},
			{
				ID:         396936928,
				Name:       "Project3 - Archived",
				Color:      37,
				ChildOrder: 1,
				Collapsed:  0,
				Shared:     false,
				IsDeleted:  0,
				IsArchived: 1,
				IsFavorite: 0,
			},
		},
		Items: []*item{
			makeTestItem(400000000, 396936926, false, false, false),
			makeTestItem(400000001, 396936926, false, false, false),
			makeTestItem(400000002, 396936926, false, false, false),
			makeTestItem(400000003, 396936926, true, true, true),
			makeTestItem(400000004, 396936926, false, true, false),
			makeTestItem(400000005, 396936926, true, false, true),
			makeTestItem(400000006, 396936926, true, false, true),
			{
				ID:         400000110,
				UserID:     1855589,
				ProjectID:  396936926,
				Content:    "Task with parent",
				Priority:   2,
				ParentID:   400000006,
				ChildOrder: 1,
				Checked:    0,
				DateAdded:  time1,
			},
			{
				ID:            400000106,
				UserID:        1855589,
				ProjectID:     396936926,
				Content:       "Task400000106",
				Priority:      1,
				ParentID:      0,
				ChildOrder:    1,
				DateAdded:     time1,
				Checked:       1,
				DateCompleted: time3,
				Due: &dueDate{
					Date:        "2021-01-31T19:00:00Z",
					Timezone:    nil,
					IsRecurring: false,
				},
				Labels: []int64{
					80000,
					80001,
					80002,
					80003,
				},
			},
			makeTestItem(400000107, 396936926, false, false, true),
			makeTestItem(400000108, 396936926, false, false, true),
			{
				ID:            400000109,
				UserID:        1855589,
				ProjectID:     396936926,
				Content:       "Task400000109",
				Priority:      1,
				ChildOrder:    1,
				Checked:       1,
				DateAdded:     time1,
				DateCompleted: time3,
				SectionID:     1234,
			},

			makeTestItem(400000007, 396936927, true, false, false),
			makeTestItem(400000008, 396936927, true, false, false),
			makeTestItem(400000009, 396936927, false, false, false),
			makeTestItem(400000010, 396936927, false, false, true),
			makeTestItem(400000101, 396936927, false, false, false),
			makeTestItem(400000102, 396936927, true, true, false),
			makeTestItem(400000103, 396936927, false, true, false),
			makeTestItem(400000104, 396936927, false, true, false),
			makeTestItem(400000105, 396936927, true, true, false),

			makeTestItem(400000111, 396936928, false, false, true),
		},
		Labels: []*label{
			{
				ID:    80000,
				Name:  "Label1",
				Color: 30,
			},
			{
				ID:    80001,
				Name:  "Label2",
				Color: 31,
			},
			{
				ID:    80002,
				Name:  "Label3",
				Color: 32,
			},
			{
				ID:    80003,
				Name:  "Label4",
				Color: 33,
			},
		},
		Notes: []*note{
			{
				ID:        101476,
				PostedUID: 1855589,
				ItemID:    400000000,
				Content:   "Lorem Ipsum dolor sit amet",
				Posted:    time1,
			},
			{
				ID:        101477,
				PostedUID: 1855589,
				ItemID:    400000001,
				Content:   "Lorem Ipsum dolor sit amet",
				Posted:    time1,
			},
			{
				ID:        101478,
				PostedUID: 1855589,
				ItemID:    400000003,
				Content:   "Lorem Ipsum dolor sit amet",
				Posted:    time1,
			},
			{
				ID:        101479,
				PostedUID: 1855589,
				ItemID:    400000010,
				Content:   "Lorem Ipsum dolor sit amet",
				Posted:    time1,
			},
			{
				ID:        101480,
				PostedUID: 1855589,
				ItemID:    400000101,
				Content:   "Lorem Ipsum dolor sit amet",
				FileAttachment: &fileAttachment{
					FileName:    "file.md",
					FileType:    "text/plain",
					FileSize:    12345,
					FileURL:     "https://vikunja.io/testimage.jpg", // Using an image which we are hosting, so it'll still be up
					UploadState: "completed",
				},
				Posted: time1,
			},
		},
		ProjectNotes: []*projectNote{
			{
				ID:        102000,
				Content:   "Lorem Ipsum dolor sit amet",
				ProjectID: 396936926,
				Posted:    time3,
				PostedUID: 1855589,
			},
			{
				ID:        102001,
				Content:   "Lorem Ipsum dolor sit amet 2",
				ProjectID: 396936926,
				Posted:    time3,
				PostedUID: 1855589,
			},
			{
				ID:        102002,
				Content:   "Lorem Ipsum dolor sit amet 3",
				ProjectID: 396936926,
				Posted:    time3,
				PostedUID: 1855589,
			},
			{
				ID:        102003,
				Content:   "Lorem Ipsum dolor sit amet 4",
				ProjectID: 396936927,
				Posted:    time3,
				PostedUID: 1855589,
			},
			{
				ID:        102004,
				Content:   "Lorem Ipsum dolor sit amet 5",
				ProjectID: 396936927,
				Posted:    time3,
				PostedUID: 1855589,
			},
		},
		Reminders: []*reminder{
			{
				ID:     103000,
				ItemID: 400000000,
				Due: &dueDate{
					Date:        "2020-06-15",
					IsRecurring: false,
				},
				MmOffset: 180,
			},
			{
				ID:     103001,
				ItemID: 400000000,
				Due: &dueDate{
					Date:        "2020-06-16T07:00:00",
					IsRecurring: false,
				},
			},
			{
				ID:     103002,
				ItemID: 400000002,
				Due: &dueDate{
					Date:        "2020-07-15T07:00:00Z",
					IsRecurring: true,
				},
			},
			{
				ID:     103003,
				ItemID: 400000003,
				Due: &dueDate{
					Date:        "2020-06-15T07:00:00",
					IsRecurring: false,
				},
			},
			{
				ID:     103004,
				ItemID: 400000005,
				Due: &dueDate{
					Date:        "2020-06-15T07:00:00",
					IsRecurring: false,
				},
			},
			{
				ID:     103006,
				ItemID: 400000009,
				Due: &dueDate{
					Date:        "2020-06-15T07:00:00",
					IsRecurring: false,
				},
			},
		},
		Sections: []*section{
			{
				ID:        1234,
				Name:      "Some Bucket",
				ProjectID: 396936926,
			},
		},
	}

	vikunjaLabels := []*models.Label{
		{
			Title:    "Label1",
			HexColor: todoistColors[30],
		},
		{
			Title:    "Label2",
			HexColor: todoistColors[31],
		},
		{
			Title:    "Label3",
			HexColor: todoistColors[32],
		},
		{
			Title:    "Label4",
			HexColor: todoistColors[33],
		},
	}

	expectedHierachie := []*models.NamespaceWithListsAndTasks{
		{
			Namespace: models.Namespace{
				Title: "Migrated from todoist",
			},
			Lists: []*models.ListWithTasksAndBuckets{
				{
					List: models.List{
						Title:       "Project1",
						Description: "Lorem Ipsum dolor sit amet\nLorem Ipsum dolor sit amet 2\nLorem Ipsum dolor sit amet 3",
						HexColor:    todoistColors[30],
					},
					Buckets: []*models.Bucket{
						{
							ID:    1234,
							Title: "Some Bucket",
						},
					},
					Tasks: []*models.TaskWithComments{
						{
							Task: models.Task{
								Title:       "Task400000000",
								Description: "Lorem Ipsum dolor sit amet",
								Done:        false,
								Created:     time1,
								Reminders: []time.Time{
									time.Date(2020, time.June, 15, 23, 59, 0, 0, time.UTC).In(config.GetTimeZone()),
									time.Date(2020, time.June, 16, 7, 0, 0, 0, time.UTC).In(config.GetTimeZone()),
								},
							},
						},
						{
							Task: models.Task{
								Title:       "Task400000001",
								Description: "Lorem Ipsum dolor sit amet",
								Done:        false,
								Created:     time1,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000002",
								Done:    false,
								Created: time1,
								Reminders: []time.Time{
									time.Date(2020, time.July, 15, 7, 0, 0, 0, time.UTC).In(config.GetTimeZone()),
								},
							},
						},
						{
							Task: models.Task{
								Title:       "Task400000003",
								Description: "Lorem Ipsum dolor sit amet",
								Done:        true,
								DueDate:     dueTime,
								Created:     time1,
								DoneAt:      time3,
								Labels:      vikunjaLabels,
								Reminders: []time.Time{
									time.Date(2020, time.June, 15, 7, 0, 0, 0, time.UTC).In(config.GetTimeZone()),
								},
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000004",
								Done:    false,
								Created: time1,
								Labels:  vikunjaLabels,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000005",
								Done:    true,
								DueDate: dueTime,
								Created: time1,
								DoneAt:  time3,
								Reminders: []time.Time{
									time.Date(2020, time.June, 15, 7, 0, 0, 0, time.UTC).In(config.GetTimeZone()),
								},
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000006",
								Done:    true,
								DueDate: dueTime,
								Created: time1,
								DoneAt:  time3,
								RelatedTasks: map[models.RelationKind][]*models.Task{
									models.RelationKindSubtask: {
										{
											Title:    "Task with parent",
											Done:     false,
											Priority: 2,
											Created:  time1,
											DoneAt:   nilTime,
										},
									},
								},
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000106",
								Done:    true,
								DueDate: dueTimeWithTime,
								Created: time1,
								DoneAt:  time3,
								Labels:  vikunjaLabels,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000107",
								Done:    true,
								Created: time1,
								DoneAt:  time3,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000108",
								Done:    true,
								Created: time1,
								DoneAt:  time3,
							},
						},
						{
							Task: models.Task{
								Title:    "Task400000109",
								Done:     true,
								Created:  time1,
								DoneAt:   time3,
								BucketID: 1234,
							},
						},
					},
				},
				{
					List: models.List{
						Title:       "Project2",
						Description: "Lorem Ipsum dolor sit amet 4\nLorem Ipsum dolor sit amet 5",
						HexColor:    todoistColors[37],
					},
					Tasks: []*models.TaskWithComments{
						{
							Task: models.Task{
								Title:   "Task400000007",
								Done:    false,
								DueDate: dueTime,
								Created: time1,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000008",
								Done:    false,
								DueDate: dueTime,
								Created: time1,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000009",
								Done:    false,
								Created: time1,
								Reminders: []time.Time{
									time.Date(2020, time.June, 15, 7, 0, 0, 0, time.UTC).In(config.GetTimeZone()),
								},
							},
						},
						{
							Task: models.Task{
								Title:       "Task400000010",
								Description: "Lorem Ipsum dolor sit amet",
								Done:        true,
								Created:     time1,
								DoneAt:      time3,
							},
						},
						{
							Task: models.Task{
								Title:       "Task400000101",
								Description: "Lorem Ipsum dolor sit amet",
								Done:        false,
								Created:     time1,
								Attachments: []*models.TaskAttachment{
									{
										File: &files.File{
											Name:        "file.md",
											Mime:        "text/plain",
											Size:        12345,
											Created:     time1,
											FileContent: exampleFile,
										},
										Created: time1,
									},
								},
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000102",
								Done:    false,
								DueDate: dueTime,
								Created: time1,
								Labels:  vikunjaLabels,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000103",
								Done:    false,
								Created: time1,
								Labels:  vikunjaLabels,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000104",
								Done:    false,
								Created: time1,
								Labels:  vikunjaLabels,
							},
						},
						{
							Task: models.Task{
								Title:   "Task400000105",
								Done:    false,
								DueDate: dueTime,
								Created: time1,
								Labels:  vikunjaLabels,
							},
						},
					},
				},
				{
					List: models.List{
						Title:      "Project3 - Archived",
						HexColor:   todoistColors[37],
						IsArchived: true,
					},
					Tasks: []*models.TaskWithComments{
						{
							Task: models.Task{
								Title:   "Task400000111",
								Done:    true,
								Created: time1,
								DoneAt:  time3,
							},
						},
					},
				},
			},
		},
	}

	doneItems := make(map[int64]*doneItem)
	hierachie, err := convertTodoistToVikunja(testSync, doneItems)
	assert.NoError(t, err)
	assert.NotNil(t, hierachie)
	if diff, equal := messagediff.PrettyDiff(hierachie, expectedHierachie); !equal {
		t.Errorf("converted todoist data = %v, want %v, diff: %v", hierachie, expectedHierachie, diff)
	}
}