//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
//Copyright (C) 2024 HTWKalender support@htwkalender.de

//This program is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License 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 License for more details.

//You should have received a copy of the GNU Affero General Public License
//along with this program.  If not, see <https://www.gnu.org/licenses/>.

package test

import (
	"github.com/pocketbase/pocketbase"
	"github.com/pocketbase/pocketbase/tests"
	"htwkalender/data-manager/model"
	"htwkalender/data-manager/service/feed"
	mockTime "htwkalender/data-manager/service/functions/time"
	"reflect"
	"testing"
	"time"
)

const testDataDir = "../mockData"

func setupTestApp(t testing.TB) *tests.TestApp {
	testApp, err := tests.NewTestApp(testDataDir)
	if err != nil {
		t.Fatal(err)
	}
	return testApp
}

func TestClearFeeds(t *testing.T) {
	type args struct {
		months    int
		mockClock mockTime.MockClock
	}

	testCases := []struct {
		name string
		args args
		want int
	}{
		{
			name: "Clear feeds older than 6 months",
			args: args{
				months: 6,
				mockClock: mockTime.MockClock{
					NowTime: time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC),
				},
			},
			want: 1,
		},
		{
			name: "Clear all feeds - recent clock",
			args: args{
				months: 1,
				mockClock: mockTime.MockClock{
					NowTime: time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC),
				},
			},
			want: 0,
		},
		{
			name: "No clearing - very old clock",
			args: args{
				months: 1,
				mockClock: mockTime.MockClock{
					NowTime: time.Date(2010, 1, 1, 0, 0, 0, 0, time.UTC),
				},
			},
			want: 3,
		},
	}

	for _, tt := range testCases {
		t.Run(tt.name, func(t *testing.T) {
			app := setupTestApp(t)
			base := &pocketbase.PocketBase{App: app}

			feed.ClearFeeds(base, tt.args.months, tt.args.mockClock)

			var feeds []*model.Feed
			err := app.DB().Select("id").From("feeds").All(&feeds)
			if err != nil {
				t.Fatal(err)
			}

			if got := len(feeds); got != tt.want {
				t.Errorf("ClearFeeds() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestCombineEventsInFeed(t *testing.T) {
	type args struct {
		events model.Events
	}
	testCases := []struct {
		name string
		args args
		want model.Events
	}{
		{
			name: "Combine duplicate events with different rooms and notes",
			args: args{
				events: model.Events{
					{
						Name:  "Modellierung",
						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
						Prof:  "Prof. Bunt",
						Rooms: "LI001",
						Notes: "Gruppe 2",
					},
					{
						Name:  "Modellierung",
						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
						Prof:  "Prof. Bunt",
						Rooms: "LI002",
						Notes: "Gruppe 1",
					},
				},
			},
			want: model.Events{
				{
					Name:  "Modellierung",
					Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
					End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
					Prof:  "Prof. Bunt",
					Rooms: "LI001, LI002",
					Notes: "LI001 - Gruppe 2 (Prof. Bunt)\nLI002 - Gruppe 1 (Prof. Bunt)",
				},
			},
		},
		{
			name: "Do not combine different events",
			args: args{
				events: model.Events{
					{
						Name:  "Modellierung",
						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
						Prof:  "Prof. Bunt",
						Rooms: "LI001",
						Notes: "Gruppe 2",
					},
					{
						Name:  "Modellierung - 2",
						Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
						End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
						Prof:  "Prof. Bunt",
						Rooms: "LI002",
						Notes: "Gruppe 1",
					},
				},
			},
			want: model.Events{
				{
					Name:  "Modellierung",
					Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
					End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
					Prof:  "Prof. Bunt",
					Rooms: "LI001",
					Notes: "Gruppe 2",
				},
				{
					Name:  "Modellierung - 2",
					Start: mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 0, 0, 0, 0, time.UTC)),
					End:   mockTime.ParseAsTypesDatetime(time.Date(2023, 12, 1, 4, 0, 0, 0, time.UTC)),
					Prof:  "Prof. Bunt",
					Rooms: "LI002",
					Notes: "Gruppe 1",
				},
			},
		},
		{
			name: "Empty events input",
			args: args{
				events: model.Events{},
			},
			want: model.Events{},
		},
	}

	for _, tt := range testCases {
		t.Run(tt.name, func(t *testing.T) {
			if got := feed.CombineEventsInFeed(tt.args.events); !reflect.DeepEqual(got, tt.want) {
				t.Errorf("CombineEventsInFeed() = %v, want %v", got, tt.want)
			}
		})
	}
}