// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package issues_test

import (
	"context"
	"fmt"
	"sort"
	"strconv"
	"sync"
	"testing"
	"time"

	"code.gitea.io/gitea/models/db"
	"code.gitea.io/gitea/models/foreignreference"
	issues_model "code.gitea.io/gitea/models/issues"
	"code.gitea.io/gitea/models/organization"
	repo_model "code.gitea.io/gitea/models/repo"
	"code.gitea.io/gitea/models/unittest"
	user_model "code.gitea.io/gitea/models/user"

	"github.com/stretchr/testify/assert"
	"xorm.io/builder"
)

func TestIssue_ReplaceLabels(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	testSuccess := func(issueID int64, labelIDs []int64) {
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: issueID})
		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: issue.RepoID})
		doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: repo.OwnerID})

		labels := make([]*issues_model.Label, len(labelIDs))
		for i, labelID := range labelIDs {
			labels[i] = unittest.AssertExistsAndLoadBean(t, &issues_model.Label{ID: labelID, RepoID: repo.ID})
		}
		assert.NoError(t, issues_model.ReplaceIssueLabels(issue, labels, doer))
		unittest.AssertCount(t, &issues_model.IssueLabel{IssueID: issueID}, len(labelIDs))
		for _, labelID := range labelIDs {
			unittest.AssertExistsAndLoadBean(t, &issues_model.IssueLabel{IssueID: issueID, LabelID: labelID})
		}
	}

	testSuccess(1, []int64{2})
	testSuccess(1, []int64{1, 2})
	testSuccess(1, []int64{})
}

func Test_GetIssueIDsByRepoID(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	ids, err := issues_model.GetIssueIDsByRepoID(db.DefaultContext, 1)
	assert.NoError(t, err)
	assert.Len(t, ids, 5)
}

func TestIssueAPIURL(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 1})
	err := issue.LoadAttributes(db.DefaultContext)

	assert.NoError(t, err)
	assert.Equal(t, "https://try.gitea.io/api/v1/repos/user2/repo1/issues/1", issue.APIURL())
}

func TestGetIssuesByIDs(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	testSuccess := func(expectedIssueIDs, nonExistentIssueIDs []int64) {
		issues, err := issues_model.GetIssuesByIDs(db.DefaultContext, append(expectedIssueIDs, nonExistentIssueIDs...))
		assert.NoError(t, err)
		actualIssueIDs := make([]int64, len(issues))
		for i, issue := range issues {
			actualIssueIDs[i] = issue.ID
		}
		assert.Equal(t, expectedIssueIDs, actualIssueIDs)
	}
	testSuccess([]int64{1, 2, 3}, []int64{})
	testSuccess([]int64{1, 2, 3}, []int64{unittest.NonexistentID})
}

func TestGetParticipantIDsByIssue(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	checkParticipants := func(issueID int64, userIDs []int) {
		issue, err := issues_model.GetIssueByID(db.DefaultContext, issueID)
		assert.NoError(t, err)
		participants, err := issue.GetParticipantIDsByIssue(db.DefaultContext)
		if assert.NoError(t, err) {
			participantsIDs := make([]int, len(participants))
			for i, uid := range participants {
				participantsIDs[i] = int(uid)
			}
			sort.Ints(participantsIDs)
			sort.Ints(userIDs)
			assert.Equal(t, userIDs, participantsIDs)
		}
	}

	// User 1 is issue1 poster (see fixtures/issue.yml)
	// User 2 only labeled issue1 (see fixtures/comment.yml)
	// Users 3 and 5 made actual comments (see fixtures/comment.yml)
	// User 3 is inactive, thus not active participant
	checkParticipants(1, []int{1, 5})
}

func TestIssue_ClearLabels(t *testing.T) {
	tests := []struct {
		issueID int64
		doerID  int64
	}{
		{1, 2}, // non-pull-request, has labels
		{2, 2}, // pull-request, has labels
		{3, 2}, // pull-request, has no labels
	}
	for _, test := range tests {
		assert.NoError(t, unittest.PrepareTestDatabase())
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: test.issueID})
		doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: test.doerID})
		assert.NoError(t, issues_model.ClearIssueLabels(issue, doer))
		unittest.AssertNotExistsBean(t, &issues_model.IssueLabel{IssueID: test.issueID})
	}
}

func TestUpdateIssueCols(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{})

	const newTitle = "New Title for unit test"
	issue.Title = newTitle

	prevContent := issue.Content
	issue.Content = "This should have no effect"

	now := time.Now().Unix()
	assert.NoError(t, issues_model.UpdateIssueCols(db.DefaultContext, issue, "name"))
	then := time.Now().Unix()

	updatedIssue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: issue.ID})
	assert.EqualValues(t, newTitle, updatedIssue.Title)
	assert.EqualValues(t, prevContent, updatedIssue.Content)
	unittest.AssertInt64InRange(t, now, then, int64(updatedIssue.UpdatedUnix))
}

func TestIssues(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	for _, test := range []struct {
		Opts             issues_model.IssuesOptions
		ExpectedIssueIDs []int64
	}{
		{
			issues_model.IssuesOptions{
				AssigneeID: 1,
				SortType:   "oldest",
			},
			[]int64{1, 6},
		},
		{
			issues_model.IssuesOptions{
				RepoCond: builder.In("repo_id", 1, 3),
				SortType: "oldest",
				ListOptions: db.ListOptions{
					Page:     1,
					PageSize: 4,
				},
			},
			[]int64{1, 2, 3, 5},
		},
		{
			issues_model.IssuesOptions{
				LabelIDs: []int64{1},
				ListOptions: db.ListOptions{
					Page:     1,
					PageSize: 4,
				},
			},
			[]int64{2, 1},
		},
		{
			issues_model.IssuesOptions{
				LabelIDs: []int64{1, 2},
				ListOptions: db.ListOptions{
					Page:     1,
					PageSize: 4,
				},
			},
			[]int64{}, // issues with **both** label 1 and 2, none of these issues matches, TODO: add more tests
		},
	} {
		issues, err := issues_model.Issues(&test.Opts)
		assert.NoError(t, err)
		if assert.Len(t, issues, len(test.ExpectedIssueIDs)) {
			for i, issue := range issues {
				assert.EqualValues(t, test.ExpectedIssueIDs[i], issue.ID)
			}
		}
	}
}

func TestGetUserIssueStats(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	for _, test := range []struct {
		Opts               issues_model.UserIssueStatsOptions
		ExpectedIssueStats issues_model.IssueStats
	}{
		{
			issues_model.UserIssueStatsOptions{
				UserID:     1,
				RepoIDs:    []int64{1},
				FilterMode: issues_model.FilterModeAll,
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 1, // 6
				AssignCount:           1, // 6
				CreateCount:           1, // 6
				OpenCount:             1, // 6
				ClosedCount:           1, // 1
			},
		},
		{
			issues_model.UserIssueStatsOptions{
				UserID:     1,
				RepoIDs:    []int64{1},
				FilterMode: issues_model.FilterModeAll,
				IsClosed:   true,
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 1, // 6
				AssignCount:           0,
				CreateCount:           0,
				OpenCount:             1, // 6
				ClosedCount:           1, // 1
			},
		},
		{
			issues_model.UserIssueStatsOptions{
				UserID:     1,
				FilterMode: issues_model.FilterModeAssign,
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 1, // 6
				AssignCount:           1, // 6
				CreateCount:           1, // 6
				OpenCount:             1, // 6
				ClosedCount:           0,
			},
		},
		{
			issues_model.UserIssueStatsOptions{
				UserID:     1,
				FilterMode: issues_model.FilterModeCreate,
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 1, // 6
				AssignCount:           1, // 6
				CreateCount:           1, // 6
				OpenCount:             1, // 6
				ClosedCount:           0,
			},
		},
		{
			issues_model.UserIssueStatsOptions{
				UserID:     1,
				FilterMode: issues_model.FilterModeMention,
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 1, // 6
				AssignCount:           1, // 6
				CreateCount:           1, // 6
				MentionCount:          0,
				OpenCount:             0,
				ClosedCount:           0,
			},
		},
		{
			issues_model.UserIssueStatsOptions{
				UserID:     1,
				FilterMode: issues_model.FilterModeCreate,
				IssueIDs:   []int64{1},
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 1, // 1
				AssignCount:           1, // 1
				CreateCount:           1, // 1
				OpenCount:             1, // 1
				ClosedCount:           0,
			},
		},
		{
			issues_model.UserIssueStatsOptions{
				UserID:     2,
				Org:        unittest.AssertExistsAndLoadBean(t, &organization.Organization{ID: 3}),
				Team:       unittest.AssertExistsAndLoadBean(t, &organization.Team{ID: 7}),
				FilterMode: issues_model.FilterModeAll,
			},
			issues_model.IssueStats{
				YourRepositoriesCount: 2,
				AssignCount:           1,
				CreateCount:           1,
				OpenCount:             2,
			},
		},
	} {
		t.Run(fmt.Sprintf("%#v", test.Opts), func(t *testing.T) {
			stats, err := issues_model.GetUserIssueStats(test.Opts)
			if !assert.NoError(t, err) {
				return
			}
			assert.Equal(t, test.ExpectedIssueStats, *stats)
		})
	}
}

func TestIssue_loadTotalTimes(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	ms, err := issues_model.GetIssueByID(db.DefaultContext, 2)
	assert.NoError(t, err)
	assert.NoError(t, ms.LoadTotalTimes(db.DefaultContext))
	assert.Equal(t, int64(3682), ms.TotalTrackedTime)
}

func TestIssue_SearchIssueIDsByKeyword(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	total, ids, err := issues_model.SearchIssueIDsByKeyword(context.TODO(), "issue2", []int64{1}, 10, 0)
	assert.NoError(t, err)
	assert.EqualValues(t, 1, total)
	assert.EqualValues(t, []int64{2}, ids)

	total, ids, err = issues_model.SearchIssueIDsByKeyword(context.TODO(), "first", []int64{1}, 10, 0)
	assert.NoError(t, err)
	assert.EqualValues(t, 1, total)
	assert.EqualValues(t, []int64{1}, ids)

	total, ids, err = issues_model.SearchIssueIDsByKeyword(context.TODO(), "for", []int64{1}, 10, 0)
	assert.NoError(t, err)
	assert.EqualValues(t, 5, total)
	assert.ElementsMatch(t, []int64{1, 2, 3, 5, 11}, ids)

	// issue1's comment id 2
	total, ids, err = issues_model.SearchIssueIDsByKeyword(context.TODO(), "good", []int64{1}, 10, 0)
	assert.NoError(t, err)
	assert.EqualValues(t, 1, total)
	assert.EqualValues(t, []int64{1}, ids)
}

func TestGetRepoIDsForIssuesOptions(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	for _, test := range []struct {
		Opts            issues_model.IssuesOptions
		ExpectedRepoIDs []int64
	}{
		{
			issues_model.IssuesOptions{
				AssigneeID: 2,
			},
			[]int64{3, 32},
		},
		{
			issues_model.IssuesOptions{
				RepoCond: builder.In("repo_id", 1, 2),
			},
			[]int64{1, 2},
		},
	} {
		repoIDs, err := issues_model.GetRepoIDsForIssuesOptions(&test.Opts, user)
		assert.NoError(t, err)
		if assert.Len(t, repoIDs, len(test.ExpectedRepoIDs)) {
			for i, repoID := range repoIDs {
				assert.EqualValues(t, test.ExpectedRepoIDs[i], repoID)
			}
		}
	}
}

func testInsertIssue(t *testing.T, title, content string, expectIndex int64) *issues_model.Issue {
	var newIssue issues_model.Issue
	t.Run(title, func(t *testing.T) {
		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
		user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})

		issue := issues_model.Issue{
			RepoID:   repo.ID,
			PosterID: user.ID,
			Poster:   user,
			Title:    title,
			Content:  content,
		}
		err := issues_model.NewIssue(repo, &issue, nil, nil)
		assert.NoError(t, err)

		has, err := db.GetEngine(db.DefaultContext).ID(issue.ID).Get(&newIssue)
		assert.NoError(t, err)
		assert.True(t, has)
		assert.EqualValues(t, issue.Title, newIssue.Title)
		assert.EqualValues(t, issue.Content, newIssue.Content)
		if expectIndex > 0 {
			assert.EqualValues(t, expectIndex, newIssue.Index)
		}
	})
	return &newIssue
}

func TestIssue_InsertIssue(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	// there are 5 issues and max index is 5 on repository 1, so this one should 6
	issue := testInsertIssue(t, "my issue1", "special issue's comments?", 6)
	_, err := db.GetEngine(db.DefaultContext).ID(issue.ID).Delete(new(issues_model.Issue))
	assert.NoError(t, err)

	issue = testInsertIssue(t, `my issue2, this is my son's love \n \r \ `, "special issue's '' comments?", 7)
	_, err = db.GetEngine(db.DefaultContext).ID(issue.ID).Delete(new(issues_model.Issue))
	assert.NoError(t, err)
}

func TestIssue_ResolveMentions(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	testSuccess := func(owner, repo, doer string, mentions []string, expected []int64) {
		o := unittest.AssertExistsAndLoadBean(t, &user_model.User{LowerName: owner})
		r := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerID: o.ID, LowerName: repo})
		issue := &issues_model.Issue{RepoID: r.ID}
		d := unittest.AssertExistsAndLoadBean(t, &user_model.User{LowerName: doer})
		resolved, err := issues_model.ResolveIssueMentionsByVisibility(db.DefaultContext, issue, d, mentions)
		assert.NoError(t, err)
		ids := make([]int64, len(resolved))
		for i, user := range resolved {
			ids[i] = user.ID
		}
		sort.Slice(ids, func(i, j int) bool { return ids[i] < ids[j] })
		assert.EqualValues(t, expected, ids)
	}

	// Public repo, existing user
	testSuccess("user2", "repo1", "user1", []string{"user5"}, []int64{5})
	// Public repo, non-existing user
	testSuccess("user2", "repo1", "user1", []string{"nonexisting"}, []int64{})
	// Public repo, doer
	testSuccess("user2", "repo1", "user1", []string{"user1"}, []int64{})
	// Private repo, team member
	testSuccess("user17", "big_test_private_4", "user20", []string{"user2"}, []int64{2})
	// Private repo, not a team member
	testSuccess("user17", "big_test_private_4", "user20", []string{"user5"}, []int64{})
	// Private repo, whole team
	testSuccess("user17", "big_test_private_4", "user15", []string{"user17/owners"}, []int64{18})
}

func TestResourceIndex(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	var wg sync.WaitGroup
	for i := 0; i < 100; i++ {
		wg.Add(1)
		go func(i int) {
			testInsertIssue(t, fmt.Sprintf("issue %d", i+1), "my issue", 0)
			wg.Done()
		}(i)
	}
	wg.Wait()
}

func TestCorrectIssueStats(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())

	// Because the condition is to have chunked database look-ups,
	// We have to more issues than `maxQueryParameters`, we will insert.
	// maxQueryParameters + 10 issues into the testDatabase.
	// Each new issues will have a constant description "Bugs are nasty"
	// Which will be used later on.

	issueAmount := issues_model.MaxQueryParameters + 10

	var wg sync.WaitGroup
	for i := 0; i < issueAmount; i++ {
		wg.Add(1)
		go func(i int) {
			testInsertIssue(t, fmt.Sprintf("Issue %d", i+1), "Bugs are nasty", 0)
			wg.Done()
		}(i)
	}
	wg.Wait()

	// Now we will get all issueID's that match the "Bugs are nasty" query.
	total, ids, err := issues_model.SearchIssueIDsByKeyword(context.TODO(), "Bugs are nasty", []int64{1}, issueAmount, 0)

	// Just to be sure.
	assert.NoError(t, err)
	assert.EqualValues(t, issueAmount, total)

	// Now we will call the GetIssueStats with these IDs and if working,
	// get the correct stats back.
	issueStats, err := issues_model.GetIssueStats(&issues_model.IssueStatsOptions{
		RepoID:   1,
		IssueIDs: ids,
	})

	// Now check the values.
	assert.NoError(t, err)
	assert.EqualValues(t, issueStats.OpenCount, issueAmount)
}

func TestIssueForeignReference(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 4})
	assert.NotEqualValues(t, issue.Index, issue.ID) // make sure they are different to avoid false positive

	// it is fine for an issue to not have a foreign reference
	err := issue.LoadAttributes(db.DefaultContext)
	assert.NoError(t, err)
	assert.Nil(t, issue.ForeignReference)

	var foreignIndex int64 = 12345
	_, err = issues_model.GetIssueByForeignIndex(context.Background(), issue.RepoID, foreignIndex)
	assert.True(t, foreignreference.IsErrLocalIndexNotExist(err))

	err = db.Insert(db.DefaultContext, &foreignreference.ForeignReference{
		LocalIndex:   issue.Index,
		ForeignIndex: strconv.FormatInt(foreignIndex, 10),
		RepoID:       issue.RepoID,
		Type:         foreignreference.TypeIssue,
	})
	assert.NoError(t, err)

	err = issue.LoadAttributes(db.DefaultContext)
	assert.NoError(t, err)

	assert.EqualValues(t, issue.ForeignReference.ForeignIndex, strconv.FormatInt(foreignIndex, 10))

	found, err := issues_model.GetIssueByForeignIndex(context.Background(), issue.RepoID, foreignIndex)
	assert.NoError(t, err)
	assert.EqualValues(t, found.Index, issue.Index)
}

func TestMilestoneList_LoadTotalTrackedTimes(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	miles := issues_model.MilestoneList{
		unittest.AssertExistsAndLoadBean(t, &issues_model.Milestone{ID: 1}),
	}

	assert.NoError(t, miles.LoadTotalTrackedTimes())

	assert.Equal(t, int64(3682), miles[0].TotalTrackedTime)
}

func TestLoadTotalTrackedTime(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	milestone := unittest.AssertExistsAndLoadBean(t, &issues_model.Milestone{ID: 1})

	assert.NoError(t, milestone.LoadTotalTrackedTime())

	assert.Equal(t, int64(3682), milestone.TotalTrackedTime)
}

func TestCountIssues(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	count, err := issues_model.CountIssues(&issues_model.IssuesOptions{})
	assert.NoError(t, err)
	assert.EqualValues(t, 17, count)
}
