// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package integration

import (
	"bytes"
	"fmt"
	"net/http"
	"net/http/httptest"
	"net/url"
	"os"
	"path"
	"strconv"
	"strings"
	"testing"
	"time"

	auth_model "code.gitea.io/gitea/models/auth"
	git_model "code.gitea.io/gitea/models/git"
	issues_model "code.gitea.io/gitea/models/issues"
	pull_model "code.gitea.io/gitea/models/pull"
	repo_model "code.gitea.io/gitea/models/repo"
	"code.gitea.io/gitea/models/unittest"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/models/webhook"
	"code.gitea.io/gitea/modules/commitstatus"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/git/gitcmd"
	"code.gitea.io/gitea/modules/gitrepo"
	"code.gitea.io/gitea/modules/queue"
	"code.gitea.io/gitea/modules/setting"
	api "code.gitea.io/gitea/modules/structs"
	"code.gitea.io/gitea/modules/test"
	"code.gitea.io/gitea/modules/translation"
	"code.gitea.io/gitea/services/automerge"
	"code.gitea.io/gitea/services/automergequeue"
	pull_service "code.gitea.io/gitea/services/pull"
	repo_service "code.gitea.io/gitea/services/repository"
	commitstatus_service "code.gitea.io/gitea/services/repository/commitstatus"
	files_service "code.gitea.io/gitea/services/repository/files"

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

func testPullMerge(t *testing.T, session *TestSession, user, repo, pullnum string, mergeStyle repo_model.MergeStyle, deleteBranch bool) *httptest.ResponseRecorder {
	req := NewRequest(t, "GET", path.Join(user, repo, "pulls", pullnum))
	resp := session.MakeRequest(t, req, http.StatusOK)

	htmlDoc := NewHTMLParser(t, resp.Body)
	link := path.Join(user, repo, "pulls", pullnum, "merge")

	options := map[string]string{
		"_csrf": htmlDoc.GetCSRF(),
		"do":    string(mergeStyle),
	}

	if deleteBranch {
		options["delete_branch_after_merge"] = "on"
	}

	req = NewRequestWithValues(t, "POST", link, options)
	resp = session.MakeRequest(t, req, http.StatusOK)

	respJSON := struct {
		Redirect string
	}{}
	DecodeJSON(t, resp, &respJSON)

	assert.Equal(t, fmt.Sprintf("/%s/%s/pulls/%s", user, repo, pullnum), respJSON.Redirect)

	return resp
}

func testPullCleanUp(t *testing.T, session *TestSession, user, repo, pullnum string) *httptest.ResponseRecorder {
	req := NewRequest(t, "GET", path.Join(user, repo, "pulls", pullnum))
	resp := session.MakeRequest(t, req, http.StatusOK)

	// Click the little button to create a pull
	htmlDoc := NewHTMLParser(t, resp.Body)
	link, exists := htmlDoc.doc.Find(".timeline-item .delete-branch-after-merge").Attr("data-url")
	assert.True(t, exists, "The template has changed, can not find delete button url")
	req = NewRequestWithValues(t, "POST", link, map[string]string{
		"_csrf": htmlDoc.GetCSRF(),
	})
	resp = session.MakeRequest(t, req, http.StatusOK)

	return resp
}

func TestPullMerge(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		hookTasks, err := webhook.HookTasks(t.Context(), 1, 1) // Retrieve previous hook number
		assert.NoError(t, err)
		hookTasksLenBefore := len(hookTasks)

		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")

		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		assert.Equal(t, 3, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		resp := testPullCreate(t, session, "user1", "repo1", false, "master", "master", "This is a pull title")

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 4, repo.NumOpenPulls)

		elem := strings.Split(test.RedirectURL(resp), "/")
		assert.Equal(t, "pulls", elem[3])
		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleMerge, false)

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		hookTasks, err = webhook.HookTasks(t.Context(), 1, 1)
		assert.NoError(t, err)
		assert.Len(t, hookTasks, hookTasksLenBefore+1)
	})
}

func TestPullRebase(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		hookTasks, err := webhook.HookTasks(t.Context(), 1, 1) // Retrieve previous hook number
		assert.NoError(t, err)
		hookTasksLenBefore := len(hookTasks)

		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")

		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		assert.Equal(t, 3, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		resp := testPullCreate(t, session, "user1", "repo1", false, "master", "master", "This is a pull title")

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 4, repo.NumOpenPulls)

		elem := strings.Split(test.RedirectURL(resp), "/")
		assert.Equal(t, "pulls", elem[3])
		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleRebase, false)

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		hookTasks, err = webhook.HookTasks(t.Context(), 1, 1)
		assert.NoError(t, err)
		assert.Len(t, hookTasks, hookTasksLenBefore+1)
	})
}

func TestPullRebaseMerge(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		hookTasks, err := webhook.HookTasks(t.Context(), 1, 1) // Retrieve previous hook number
		assert.NoError(t, err)
		hookTasksLenBefore := len(hookTasks)

		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")

		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		assert.Equal(t, 3, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		resp := testPullCreate(t, session, "user1", "repo1", false, "master", "master", "This is a pull title")

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 4, repo.NumOpenPulls)

		elem := strings.Split(test.RedirectURL(resp), "/")
		assert.Equal(t, "pulls", elem[3])
		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleRebaseMerge, false)

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		hookTasks, err = webhook.HookTasks(t.Context(), 1, 1)
		assert.NoError(t, err)
		assert.Len(t, hookTasks, hookTasksLenBefore+1)
	})
}

func TestPullSquash(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		hookTasks, err := webhook.HookTasks(t.Context(), 1, 1) // Retrieve previous hook number
		assert.NoError(t, err)
		hookTasksLenBefore := len(hookTasks)

		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited!)\n")

		resp := testPullCreate(t, session, "user1", "repo1", false, "master", "master", "This is a pull title")

		elem := strings.Split(test.RedirectURL(resp), "/")
		assert.Equal(t, "pulls", elem[3])
		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleSquash, false)

		hookTasks, err = webhook.HookTasks(t.Context(), 1, 1)
		assert.NoError(t, err)
		assert.Len(t, hookTasks, hookTasksLenBefore+1)
	})
}

func TestPullCleanUpAfterMerge(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "feature/test", "README.md", "Hello, World (Edited - TestPullCleanUpAfterMerge)\n")

		repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		assert.Equal(t, 3, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		resp := testPullCreate(t, session, "user1", "repo1", false, "master", "feature/test", "This is a pull title")

		elem := strings.Split(test.RedirectURL(resp), "/")
		assert.Equal(t, "pulls", elem[3])
		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 4, repo.NumOpenPulls)

		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleMerge, false)

		repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: repo.ID})
		assert.Equal(t, 4, repo.NumPulls)
		assert.Equal(t, 3, repo.NumOpenPulls)

		// Check PR branch deletion
		resp = testPullCleanUp(t, session, elem[1], elem[2], elem[4])
		respJSON := struct {
			Redirect string
		}{}
		DecodeJSON(t, resp, &respJSON)

		assert.NotEmpty(t, respJSON.Redirect, "Redirected URL is not found")

		elem = strings.Split(respJSON.Redirect, "/")
		assert.Equal(t, "pulls", elem[3])

		// Check branch deletion result
		req := NewRequest(t, "GET", respJSON.Redirect)
		resp = session.MakeRequest(t, req, http.StatusOK)

		htmlDoc := NewHTMLParser(t, resp.Body)
		resultMsg := htmlDoc.doc.Find(".ui.message>p").Text()

		assert.Equal(t, "Branch \"user1/repo1:feature/test\" has been deleted.", resultMsg)
	})
}

func TestCantMergeWorkInProgress(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")

		resp := testPullCreate(t, session, "user1", "repo1", false, "master", "master", "[wip] This is a pull title")

		req := NewRequest(t, "GET", test.RedirectURL(resp))
		resp = session.MakeRequest(t, req, http.StatusOK)
		htmlDoc := NewHTMLParser(t, resp.Body)
		text := strings.TrimSpace(htmlDoc.doc.Find(".merge-section > .item").Last().Text())
		assert.NotEmpty(t, text, "Can't find WIP text")

		assert.Contains(t, text, translation.NewLocale("en-US").TrString("repo.pulls.cannot_merge_work_in_progress"), "Unable to find WIP text")
		assert.Contains(t, text, "[wip]", "Unable to find WIP text")
	})
}

func TestCantMergeConflict(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "conflict", "README.md", "Hello, World (Edited Once)\n")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "base", "README.md", "Hello, World (Edited Twice)\n")

		// Use API to create a conflicting pr
		token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeWriteRepository)
		req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls", "user1", "repo1"), &api.CreatePullRequestOption{
			Head:  "conflict",
			Base:  "base",
			Title: "create a conflicting pr",
		}).AddTokenAuth(token)
		session.MakeRequest(t, req, http.StatusCreated)

		// Now this PR will be marked conflict - or at least a race will do - so drop down to pure code at this point...
		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{
			Name: "user1",
		})
		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{
			OwnerID: user1.ID,
			Name:    "repo1",
		})

		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			HeadRepoID: repo1.ID,
			BaseRepoID: repo1.ID,
			HeadBranch: "conflict",
			BaseBranch: "base",
		})

		gitRepo, err := gitrepo.OpenRepository(t.Context(), repo1)
		assert.NoError(t, err)

		err = pull_service.Merge(t.Context(), pr, user1, gitRepo, repo_model.MergeStyleMerge, "", "CONFLICT", false)
		assert.Error(t, err, "Merge should return an error due to conflict")
		assert.True(t, pull_service.IsErrMergeConflicts(err), "Merge error is not a conflict error")

		err = pull_service.Merge(t.Context(), pr, user1, gitRepo, repo_model.MergeStyleRebase, "", "CONFLICT", false)
		assert.Error(t, err, "Merge should return an error due to conflict")
		assert.True(t, pull_service.IsErrRebaseConflicts(err), "Merge error is not a conflict error")
		gitRepo.Close()
	})
}

func TestCantMergeUnrelated(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "base", "README.md", "Hello, World (Edited Twice)\n")

		// Now we want to create a commit on a branch that is totally unrelated to our current head
		// Drop down to pure code at this point
		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{
			Name: "user1",
		})
		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{
			OwnerID: user1.ID,
			Name:    "repo1",
		})
		path := repo_model.RepoPath(user1.Name, repo1.Name)

		err := gitcmd.NewCommand("read-tree", "--empty").Run(t.Context(), &gitcmd.RunOpts{Dir: path})
		assert.NoError(t, err)

		stdin := strings.NewReader("Unrelated File")
		var stdout strings.Builder
		err = gitcmd.NewCommand("hash-object", "-w", "--stdin").Run(t.Context(), &gitcmd.RunOpts{
			Dir:    path,
			Stdin:  stdin,
			Stdout: &stdout,
		})

		assert.NoError(t, err)
		sha := strings.TrimSpace(stdout.String())

		_, _, err = gitcmd.NewCommand("update-index", "--add", "--replace", "--cacheinfo").AddDynamicArguments("100644", sha, "somewher-over-the-rainbow").RunStdString(t.Context(), &gitcmd.RunOpts{Dir: path})
		assert.NoError(t, err)

		treeSha, _, err := gitcmd.NewCommand("write-tree").RunStdString(t.Context(), &gitcmd.RunOpts{Dir: path})
		assert.NoError(t, err)
		treeSha = strings.TrimSpace(treeSha)

		commitTimeStr := time.Now().Format(time.RFC3339)
		doerSig := user1.NewGitSig()
		env := append(os.Environ(),
			"GIT_AUTHOR_NAME="+doerSig.Name,
			"GIT_AUTHOR_EMAIL="+doerSig.Email,
			"GIT_AUTHOR_DATE="+commitTimeStr,
			"GIT_COMMITTER_NAME="+doerSig.Name,
			"GIT_COMMITTER_EMAIL="+doerSig.Email,
			"GIT_COMMITTER_DATE="+commitTimeStr,
		)

		messageBytes := new(bytes.Buffer)
		_, _ = messageBytes.WriteString("Unrelated")
		_, _ = messageBytes.WriteString("\n")

		stdout.Reset()
		err = gitcmd.NewCommand("commit-tree").AddDynamicArguments(treeSha).
			Run(t.Context(), &gitcmd.RunOpts{
				Env:    env,
				Dir:    path,
				Stdin:  messageBytes,
				Stdout: &stdout,
			})
		assert.NoError(t, err)
		commitSha := strings.TrimSpace(stdout.String())

		_, _, err = gitcmd.NewCommand("branch", "unrelated").AddDynamicArguments(commitSha).RunStdString(t.Context(), &gitcmd.RunOpts{Dir: path})
		assert.NoError(t, err)

		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "conflict", "README.md", "Hello, World (Edited Once)\n")

		// Use API to create a conflicting pr
		token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeWriteRepository)
		req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls", "user1", "repo1"), &api.CreatePullRequestOption{
			Head:  "unrelated",
			Base:  "base",
			Title: "create an unrelated pr",
		}).AddTokenAuth(token)
		session.MakeRequest(t, req, http.StatusCreated)

		// Now this PR could be marked conflict - or at least a race may occur - so drop down to pure code at this point...
		gitRepo, err := gitrepo.OpenRepository(t.Context(), repo1)
		assert.NoError(t, err)
		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			HeadRepoID: repo1.ID,
			BaseRepoID: repo1.ID,
			HeadBranch: "unrelated",
			BaseBranch: "base",
		})

		err = pull_service.Merge(t.Context(), pr, user1, gitRepo, repo_model.MergeStyleMerge, "", "UNRELATED", false)
		assert.Error(t, err, "Merge should return an error due to unrelated")
		assert.True(t, pull_service.IsErrMergeUnrelatedHistories(err), "Merge error is not a unrelated histories error")
		gitRepo.Close()
	})
}

func TestFastForwardOnlyMerge(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "update", "README.md", "Hello, World 2\n")

		// Use API to create a pr from update to master
		token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeWriteRepository)
		req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls", "user1", "repo1"), &api.CreatePullRequestOption{
			Head:  "update",
			Base:  "master",
			Title: "create a pr that can be fast-forward-only merged",
		}).AddTokenAuth(token)
		session.MakeRequest(t, req, http.StatusCreated)

		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{
			Name: "user1",
		})
		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{
			OwnerID: user1.ID,
			Name:    "repo1",
		})

		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			HeadRepoID: repo1.ID,
			BaseRepoID: repo1.ID,
			HeadBranch: "update",
			BaseBranch: "master",
		})

		gitRepo, err := git.OpenRepository(t.Context(), repo_model.RepoPath(user1.Name, repo1.Name))
		assert.NoError(t, err)

		err = pull_service.Merge(t.Context(), pr, user1, gitRepo, repo_model.MergeStyleFastForwardOnly, "", "FAST-FORWARD-ONLY", false)

		assert.NoError(t, err)

		gitRepo.Close()
	})
}

func TestCantFastForwardOnlyMergeDiverging(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "diverging", "README.md", "Hello, World diverged\n")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World 2\n")

		// Use API to create a pr from diverging to update
		token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeWriteRepository)
		req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/%s/pulls", "user1", "repo1"), &api.CreatePullRequestOption{
			Head:  "diverging",
			Base:  "master",
			Title: "create a pr from a diverging branch",
		}).AddTokenAuth(token)
		session.MakeRequest(t, req, http.StatusCreated)

		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{
			Name: "user1",
		})
		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{
			OwnerID: user1.ID,
			Name:    "repo1",
		})

		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			HeadRepoID: repo1.ID,
			BaseRepoID: repo1.ID,
			HeadBranch: "diverging",
			BaseBranch: "master",
		})

		gitRepo, err := git.OpenRepository(t.Context(), repo_model.RepoPath(user1.Name, repo1.Name))
		assert.NoError(t, err)

		err = pull_service.Merge(t.Context(), pr, user1, gitRepo, repo_model.MergeStyleFastForwardOnly, "", "DIVERGING", false)

		assert.Error(t, err, "Merge should return an error due to being for a diverging branch")
		assert.True(t, pull_service.IsErrMergeDivergingFastForwardOnly(err), "Merge error is not a diverging fast-forward-only error")

		gitRepo.Close()
	})
}

func TestConflictChecking(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})

		// Create new clean repo to test conflict checking.
		baseRepo, err := repo_service.CreateRepository(t.Context(), user, user, repo_service.CreateRepoOptions{
			Name:          "conflict-checking",
			Description:   "Tempo repo",
			AutoInit:      true,
			Readme:        "Default",
			DefaultBranch: "main",
		})
		assert.NoError(t, err)
		assert.NotEmpty(t, baseRepo)

		// create a commit on new branch.
		_, err = files_service.ChangeRepoFiles(t.Context(), baseRepo, user, &files_service.ChangeRepoFilesOptions{
			Files: []*files_service.ChangeRepoFile{
				{
					Operation:     "create",
					TreePath:      "important_file",
					ContentReader: strings.NewReader("Just a non-important file"),
				},
			},
			Message:   "Add a important file",
			OldBranch: "main",
			NewBranch: "important-secrets",
		})
		assert.NoError(t, err)

		// create a commit on main branch.
		_, err = files_service.ChangeRepoFiles(t.Context(), baseRepo, user, &files_service.ChangeRepoFilesOptions{
			Files: []*files_service.ChangeRepoFile{
				{
					Operation:     "create",
					TreePath:      "important_file",
					ContentReader: strings.NewReader("Not the same content :P"),
				},
			},
			Message:   "Add a important file",
			OldBranch: "main",
			NewBranch: "main",
		})
		assert.NoError(t, err)

		// create Pull to merge the important-secrets branch into main branch.
		pullIssue := &issues_model.Issue{
			RepoID:   baseRepo.ID,
			Title:    "PR with conflict!",
			PosterID: user.ID,
			Poster:   user,
			IsPull:   true,
		}

		pullRequest := &issues_model.PullRequest{
			HeadRepoID: baseRepo.ID,
			BaseRepoID: baseRepo.ID,
			HeadBranch: "important-secrets",
			BaseBranch: "main",
			HeadRepo:   baseRepo,
			BaseRepo:   baseRepo,
			Type:       issues_model.PullRequestGitea,
		}
		prOpts := &pull_service.NewPullRequestOptions{Repo: baseRepo, Issue: pullIssue, PullRequest: pullRequest}
		err = pull_service.NewPullRequest(t.Context(), prOpts)
		assert.NoError(t, err)

		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{Title: "PR with conflict!"})
		assert.NoError(t, issue.LoadPullRequest(t.Context()))
		conflictingPR := issue.PullRequest

		// Ensure conflictedFiles is populated.
		assert.Len(t, conflictingPR.ConflictedFiles, 1)
		// Check if status is correct.
		assert.Equal(t, issues_model.PullRequestStatusConflict, conflictingPR.Status)
		// Ensure that mergeable returns false
		assert.False(t, conflictingPR.Mergeable(t.Context()))
	})
}

func TestPullRetargetChildOnBranchDelete(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testEditFileToNewBranch(t, session, "user2", "repo1", "master", "base-pr", "README.md", "Hello, World\n(Edited - TestPullRetargetOnCleanup - base PR)\n")
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "base-pr", "child-pr", "README.md", "Hello, World\n(Edited - TestPullRetargetOnCleanup - base PR)\n(Edited - TestPullRetargetOnCleanup - child PR)")

		respBasePR := testPullCreate(t, session, "user2", "repo1", true, "master", "base-pr", "Base Pull Request")
		elemBasePR := strings.Split(test.RedirectURL(respBasePR), "/")
		assert.Equal(t, "pulls", elemBasePR[3])

		respChildPR := testPullCreate(t, session, "user1", "repo1", false, "base-pr", "child-pr", "Child Pull Request")
		elemChildPR := strings.Split(test.RedirectURL(respChildPR), "/")
		assert.Equal(t, "pulls", elemChildPR[3])

		testPullMerge(t, session, elemBasePR[1], elemBasePR[2], elemBasePR[4], repo_model.MergeStyleMerge, true)

		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		branchBasePR := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo1.ID, Name: "base-pr"})
		assert.True(t, branchBasePR.IsDeleted)

		// Check child PR
		req := NewRequest(t, "GET", test.RedirectURL(respChildPR))
		resp := session.MakeRequest(t, req, http.StatusOK)

		htmlDoc := NewHTMLParser(t, resp.Body)
		targetBranch := htmlDoc.doc.Find("#branch_target>a").Text()
		prStatus := strings.TrimSpace(htmlDoc.doc.Find(".issue-title-meta>.issue-state-label").Text())

		assert.Equal(t, "master", targetBranch)
		assert.Equal(t, "Open", prStatus)
	})
}

func TestPullDontRetargetChildOnWrongRepo(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFileToNewBranch(t, session, "user1", "repo1", "master", "base-pr", "README.md", "Hello, World\n(Edited - TestPullDontRetargetChildOnWrongRepo - base PR)\n")
		testEditFileToNewBranch(t, session, "user1", "repo1", "base-pr", "child-pr", "README.md", "Hello, World\n(Edited - TestPullDontRetargetChildOnWrongRepo - base PR)\n(Edited - TestPullDontRetargetChildOnWrongRepo - child PR)")

		respBasePR := testPullCreate(t, session, "user1", "repo1", false, "master", "base-pr", "Base Pull Request")
		elemBasePR := strings.Split(test.RedirectURL(respBasePR), "/")
		assert.Equal(t, "pulls", elemBasePR[3])

		respChildPR := testPullCreate(t, session, "user1", "repo1", true, "base-pr", "child-pr", "Child Pull Request")
		elemChildPR := strings.Split(test.RedirectURL(respChildPR), "/")
		assert.Equal(t, "pulls", elemChildPR[3])

		defer test.MockVariableValue(&setting.Repository.PullRequest.RetargetChildrenOnMerge, false)()

		testPullMerge(t, session, elemBasePR[1], elemBasePR[2], elemBasePR[4], repo_model.MergeStyleMerge, true)

		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user1", Name: "repo1"})
		branchBasePR := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo1.ID, Name: "base-pr"})
		assert.True(t, branchBasePR.IsDeleted)

		// Check child PR
		req := NewRequest(t, "GET", test.RedirectURL(respChildPR))
		resp := session.MakeRequest(t, req, http.StatusOK)

		htmlDoc := NewHTMLParser(t, resp.Body)
		// the branch has been deleted, so there is no a html tag instead of span
		targetBranch := htmlDoc.doc.Find("#branch_target>span").Text()
		prStatus := strings.TrimSpace(htmlDoc.doc.Find(".issue-title-meta>.issue-state-label").Text())

		assert.Equal(t, "base-pr", targetBranch)
		assert.Equal(t, "Closed", prStatus)
	})
}

func TestPullRequestMergedWithNoPermissionDeleteBranch(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		session := loginUser(t, "user4")
		testRepoFork(t, session, "user2", "repo1", "user4", "repo1", "")
		testEditFileToNewBranch(t, session, "user4", "repo1", "master", "base-pr", "README.md", "Hello, World\n(Edited - TestPullDontRetargetChildOnWrongRepo - base PR)\n")

		respBasePR := testPullCreate(t, session, "user4", "repo1", false, "master", "base-pr", "Base Pull Request")
		elemBasePR := strings.Split(test.RedirectURL(respBasePR), "/")
		assert.Equal(t, "pulls", elemBasePR[3])

		// user2 has no permission to delete branch of repo user1/repo1
		session2 := loginUser(t, "user2")
		testPullMerge(t, session2, elemBasePR[1], elemBasePR[2], elemBasePR[4], repo_model.MergeStyleMerge, true)

		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user4", Name: "repo1"})
		branchBasePR := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo1.ID, Name: "base-pr"})
		// branch has not been deleted
		assert.False(t, branchBasePR.IsDeleted)
	})
}

func TestPullMergeIndexerNotifier(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		// create a pull request
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testRepoFork(t, session, "user2", "repo1", "user1", "repo1", "")
		testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
		createPullResp := testPullCreate(t, session, "user1", "repo1", false, "master", "master", "Indexer notifier test pull")

		assert.NoError(t, queue.GetManager().FlushAll(t.Context(), 0))
		time.Sleep(time.Second)

		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{
			OwnerName: "user2",
			Name:      "repo1",
		})
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{
			RepoID:   repo1.ID,
			Title:    "Indexer notifier test pull",
			IsPull:   true,
			IsClosed: false,
		})

		// build the request for searching issues
		link, _ := url.Parse("/api/v1/repos/issues/search")
		query := url.Values{}
		query.Add("state", "closed")
		query.Add("type", "pulls")
		query.Add("q", "notifier")
		link.RawQuery = query.Encode()

		// search issues
		searchIssuesResp := session.MakeRequest(t, NewRequest(t, "GET", link.String()), http.StatusOK)
		var apiIssuesBefore []*api.Issue
		DecodeJSON(t, searchIssuesResp, &apiIssuesBefore)
		assert.Empty(t, apiIssuesBefore)

		// merge the pull request
		elem := strings.Split(test.RedirectURL(createPullResp), "/")
		assert.Equal(t, "pulls", elem[3])
		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleMerge, false)

		// check if the issue is closed
		issue = unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{
			ID: issue.ID,
		})
		assert.True(t, issue.IsClosed)

		assert.NoError(t, queue.GetManager().FlushAll(t.Context(), 0))
		time.Sleep(time.Second)

		// search issues again
		searchIssuesResp = session.MakeRequest(t, NewRequest(t, "GET", link.String()), http.StatusOK)
		var apiIssuesAfter []*api.Issue
		DecodeJSON(t, searchIssuesResp, &apiIssuesAfter)
		if assert.Len(t, apiIssuesAfter, 1) {
			assert.Equal(t, issue.ID, apiIssuesAfter[0].ID)
		}
	})
}

func TestPullAutoMergeAfterCommitStatusSucceed(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		// create a pull request
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
		forkedName := "repo1-1"
		testRepoFork(t, session, "user2", "repo1", "user1", forkedName, "")
		testEditFile(t, session, "user1", forkedName, "master", "README.md", "Hello, World (Edited)\n")
		testPullCreate(t, session, "user1", forkedName, false, "master", "master", "Indexer notifier test pull")

		baseRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		forkedRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user1", Name: forkedName})
		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			BaseRepoID: baseRepo.ID,
			BaseBranch: "master",
			HeadRepoID: forkedRepo.ID,
			HeadBranch: "master",
		})

		// add protected branch for commit status
		csrf := GetUserCSRFToken(t, session)
		// Change the "master" branch to "protected"
		req := NewRequestWithValues(t, "POST", "/user2/repo1/settings/branches/edit", map[string]string{
			"_csrf":                 csrf,
			"rule_name":             "master",
			"enable_push":           "true",
			"enable_status_check":   "true",
			"status_check_contexts": "gitea/actions",
		})
		session.MakeRequest(t, req, http.StatusSeeOther)

		oldAutoMergeAddToQueue := automergequeue.AddToQueue
		addToQueueShaChan := make(chan string, 1)
		automergequeue.AddToQueue = func(pr *issues_model.PullRequest, sha string) {
			addToQueueShaChan <- sha
		}
		// first time insert automerge record, return true
		scheduled, err := automerge.ScheduleAutoMerge(t.Context(), user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
		assert.NoError(t, err)
		assert.True(t, scheduled)
		// and the pr should be added to automergequeue, in case it is already "mergeable"
		select {
		case <-addToQueueShaChan:
		case <-time.After(time.Second):
			assert.FailNow(t, "Timeout: nothing was added to automergequeue")
		}
		automergequeue.AddToQueue = oldAutoMergeAddToQueue

		// second time insert automerge record, return false because it does exist
		scheduled, err = automerge.ScheduleAutoMerge(t.Context(), user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
		assert.Error(t, err)
		assert.False(t, scheduled)

		// reload pr again
		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
		assert.False(t, pr.HasMerged)
		assert.Empty(t, pr.MergedCommitID)

		// update commit status to success, then it should be merged automatically
		baseGitRepo, err := gitrepo.OpenRepository(t.Context(), baseRepo)
		assert.NoError(t, err)
		sha, err := baseGitRepo.GetRefCommitID(pr.GetGitHeadRefName())
		assert.NoError(t, err)
		branches, _, err := baseGitRepo.GetBranchNames(0, 100)
		assert.NoError(t, err)
		assert.ElementsMatch(t, []string{"sub-home-md-img-check", "home-md-img-check", "pr-to-update", "branch2", "DefaultBranch", "develop", "feature/1", "master"}, branches)
		baseGitRepo.Close()

		err = commitstatus_service.CreateCommitStatus(t.Context(), baseRepo, user1, sha, &git_model.CommitStatus{
			State:     commitstatus.CommitStatusSuccess,
			TargetURL: "https://gitea.com",
			Context:   "gitea/actions",
		})
		assert.NoError(t, err)

		assert.Eventually(t, func() bool {
			pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
			return pr.HasMerged
		}, 2*time.Second, 100*time.Millisecond)
		assert.NotEmpty(t, pr.MergedCommitID)
		unittest.AssertNotExistsBean(t, &pull_model.AutoMerge{PullID: pr.ID})
	})
}

func TestPullAutoMergeAfterCommitStatusSucceedAndApproval(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
		// create a pull request
		baseUser := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
		baseSession := loginUser(t, "user2")
		forkUser := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 5})
		forkSession := loginUser(t, "user5")
		forkedName := "repo1-fork"
		testRepoFork(t, forkSession, "user2", "repo1", forkUser.Name, forkedName, "")
		testEditFile(t, forkSession, forkUser.Name, forkedName, "master", "README.md", "Hello, World (Edited)\n")
		testPullCreate(t, forkSession, forkUser.Name, forkedName, false, "master", "master", "Indexer notifier test pull")

		baseRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		forkedRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: forkUser.Name, Name: forkedName})
		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			BaseRepoID: baseRepo.ID,
			BaseBranch: "master",
			HeadRepoID: forkedRepo.ID,
			HeadBranch: "master",
		})

		// add protected branch for commit status
		csrf := GetUserCSRFToken(t, baseSession)
		// Change master branch to protected
		req := NewRequestWithValues(t, "POST", "/user2/repo1/settings/branches/edit", map[string]string{
			"_csrf":                 csrf,
			"rule_name":             "master",
			"enable_push":           "true",
			"enable_status_check":   "true",
			"status_check_contexts": "gitea/actions",
			"required_approvals":    "1",
		})
		baseSession.MakeRequest(t, req, http.StatusSeeOther)

		// first time insert automerge record, return true
		scheduled, err := automerge.ScheduleAutoMerge(t.Context(), baseUser, pr, repo_model.MergeStyleMerge, "auto merge test", false)
		assert.NoError(t, err)
		assert.True(t, scheduled)

		// second time insert automerge record, return false because it does exist
		scheduled, err = automerge.ScheduleAutoMerge(t.Context(), baseUser, pr, repo_model.MergeStyleMerge, "auto merge test", false)
		assert.Error(t, err)
		assert.False(t, scheduled)

		// reload pr again
		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
		assert.False(t, pr.HasMerged)
		assert.Empty(t, pr.MergedCommitID)

		// update commit status to success, then it should be merged automatically
		baseGitRepo, err := gitrepo.OpenRepository(t.Context(), baseRepo)
		assert.NoError(t, err)
		sha, err := baseGitRepo.GetRefCommitID(pr.GetGitHeadRefName())
		assert.NoError(t, err)
		baseGitRepo.Close()

		err = commitstatus_service.CreateCommitStatus(t.Context(), baseRepo, baseUser, sha, &git_model.CommitStatus{
			State:     commitstatus.CommitStatusSuccess,
			TargetURL: "https://gitea.com",
			Context:   "gitea/actions",
		})
		assert.NoError(t, err)

		time.Sleep(2 * time.Second)

		// reload pr again
		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
		assert.False(t, pr.HasMerged)
		assert.Empty(t, pr.MergedCommitID)

		// approve the PR from non-author
		approveSession := loginUser(t, "user2")
		req = NewRequest(t, "GET", fmt.Sprintf("/user2/repo1/pulls/%d", pr.Index))
		resp := approveSession.MakeRequest(t, req, http.StatusOK)
		htmlDoc := NewHTMLParser(t, resp.Body)
		testSubmitReview(t, approveSession, htmlDoc.GetCSRF(), "user2", "repo1", strconv.Itoa(int(pr.Index)), sha, "approve", http.StatusOK)

		assert.Eventually(t, func() bool {
			pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
			return pr.HasMerged
		}, 2*time.Second, 100*time.Millisecond)
		assert.NotEmpty(t, pr.MergedCommitID)
		unittest.AssertNotExistsBean(t, &pull_model.AutoMerge{PullID: pr.ID})
	})
}

func TestPullAutoMergeAfterCommitStatusSucceedAndApprovalForAgitFlow(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, u *url.URL) {
		// create a pull request
		baseAPITestContext := NewAPITestContext(t, "user2", "repo1", auth_model.AccessTokenScopeWriteRepository, auth_model.AccessTokenScopeWriteUser)

		dstPath := t.TempDir()

		u.Path = baseAPITestContext.GitPath()
		u.User = url.UserPassword("user2", userPassword)

		t.Run("Clone", doGitClone(dstPath, u))

		err := os.WriteFile(path.Join(dstPath, "test_file"), []byte("## test content"), 0o666)
		assert.NoError(t, err)

		err = git.AddChanges(t.Context(), dstPath, true)
		assert.NoError(t, err)

		err = git.CommitChanges(t.Context(), dstPath, git.CommitChangesOptions{
			Committer: &git.Signature{
				Email: "user2@example.com",
				Name:  "user2",
				When:  time.Now(),
			},
			Author: &git.Signature{
				Email: "user2@example.com",
				Name:  "user2",
				When:  time.Now(),
			},
			Message: "Testing commit 1",
		})
		assert.NoError(t, err)

		stderrBuf := &bytes.Buffer{}

		err = gitcmd.NewCommand("push", "origin", "HEAD:refs/for/master", "-o").
			AddDynamicArguments(`topic=test/head2`).
			AddArguments("-o").
			AddDynamicArguments(`title="create a test pull request with agit"`).
			AddArguments("-o").
			AddDynamicArguments(`description="This PR is a test pull request which created with agit"`).
			Run(t.Context(), &gitcmd.RunOpts{Dir: dstPath, Stderr: stderrBuf})
		assert.NoError(t, err)

		assert.Contains(t, stderrBuf.String(), setting.AppURL+"user2/repo1/pulls/6")

		baseRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			Flow:       issues_model.PullRequestFlowAGit,
			BaseRepoID: baseRepo.ID,
			BaseBranch: "master",
			HeadRepoID: baseRepo.ID,
			HeadBranch: "user2/test/head2",
		})

		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		// add protected branch for commit status
		csrf := GetUserCSRFToken(t, session)
		// Change master branch to protected
		req := NewRequestWithValues(t, "POST", "/user2/repo1/settings/branches/edit", map[string]string{
			"_csrf":                 csrf,
			"rule_name":             "master",
			"enable_push":           "true",
			"enable_status_check":   "true",
			"status_check_contexts": "gitea/actions",
			"required_approvals":    "1",
		})
		session.MakeRequest(t, req, http.StatusSeeOther)

		user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
		// first time insert automerge record, return true
		scheduled, err := automerge.ScheduleAutoMerge(t.Context(), user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
		assert.NoError(t, err)
		assert.True(t, scheduled)

		// second time insert automerge record, return false because it does exist
		scheduled, err = automerge.ScheduleAutoMerge(t.Context(), user1, pr, repo_model.MergeStyleMerge, "auto merge test", false)
		assert.Error(t, err)
		assert.False(t, scheduled)

		// reload pr again
		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
		assert.False(t, pr.HasMerged)
		assert.Empty(t, pr.MergedCommitID)

		// update commit status to success, then it should be merged automatically
		baseGitRepo, err := gitrepo.OpenRepository(t.Context(), baseRepo)
		assert.NoError(t, err)
		sha, err := baseGitRepo.GetRefCommitID(pr.GetGitHeadRefName())
		assert.NoError(t, err)
		baseGitRepo.Close()
		err = commitstatus_service.CreateCommitStatus(t.Context(), baseRepo, user1, sha, &git_model.CommitStatus{
			State:     commitstatus.CommitStatusSuccess,
			TargetURL: "https://gitea.com",
			Context:   "gitea/actions",
		})
		assert.NoError(t, err)

		// reload pr again
		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
		assert.False(t, pr.HasMerged)
		assert.Empty(t, pr.MergedCommitID)

		// approve the PR from non-author
		approveSession := loginUser(t, "user1") // FIXME: don't use admin user for testing
		req = NewRequest(t, "GET", fmt.Sprintf("/user2/repo1/pulls/%d", pr.Index))
		resp := approveSession.MakeRequest(t, req, http.StatusOK)
		htmlDoc := NewHTMLParser(t, resp.Body)
		testSubmitReview(t, approveSession, htmlDoc.GetCSRF(), "user2", "repo1", strconv.Itoa(int(pr.Index)), sha, "approve", http.StatusOK)

		// reload pr again
		pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: pr.ID})
		assert.True(t, pr.HasMerged)
		assert.NotEmpty(t, pr.MergedCommitID)

		unittest.AssertNotExistsBean(t, &pull_model.AutoMerge{PullID: pr.ID})
	})
}

func TestPullNonMergeForAdminWithBranchProtection(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, u *url.URL) {
		// create a pull request
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		forkedName := "repo1-1"
		testRepoFork(t, session, "user2", "repo1", "user1", forkedName, "")
		testEditFile(t, session, "user1", forkedName, "master", "README.md", "Hello, World (Edited)\n")
		testPullCreate(t, session, "user1", forkedName, false, "master", "master", "Indexer notifier test pull")

		baseRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "repo1"})
		forkedRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user1", Name: forkedName})
		unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{
			BaseRepoID: baseRepo.ID,
			BaseBranch: "master",
			HeadRepoID: forkedRepo.ID,
			HeadBranch: "master",
		})

		// add protected branch for commit status
		csrf := GetUserCSRFToken(t, session)
		// Change master branch to protected
		pbCreateReq := NewRequestWithValues(t, "POST", "/user2/repo1/settings/branches/edit", map[string]string{
			"_csrf":                      csrf,
			"rule_name":                  "master",
			"enable_push":                "true",
			"enable_status_check":        "true",
			"status_check_contexts":      "gitea/actions",
			"block_admin_merge_override": "true",
		})
		session.MakeRequest(t, pbCreateReq, http.StatusSeeOther)

		token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeWriteRepository)

		mergeReq := NewRequestWithValues(t, "POST", "/api/v1/repos/user2/repo1/pulls/6/merge", map[string]string{
			"_csrf":                     csrf,
			"head_commit_id":            "",
			"merge_when_checks_succeed": "false",
			"force_merge":               "true",
			"do":                        "rebase",
		}).AddTokenAuth(token)

		session.MakeRequest(t, mergeReq, http.StatusMethodNotAllowed)
	})
}

func TestPullSquashMergeEmpty(t *testing.T) {
	onGiteaRun(t, func(t *testing.T, u *url.URL) {
		session := loginUser(t, "user1") // FIXME: don't use admin user for testing
		testEditFileToNewBranch(t, session, "user2", "repo1", "master", "pr-squash-empty", "README.md", "Hello, World (Edited)\n")
		resp := testPullCreate(t, session, "user2", "repo1", false, "master", "pr-squash-empty", "This is a pull title")

		elem := strings.Split(test.RedirectURL(resp), "/")
		assert.Equal(t, "pulls", elem[3])

		httpContext := NewAPITestContext(t, "user2", "repo1", auth_model.AccessTokenScopeWriteRepository)
		dstPath := t.TempDir()

		u.Path = httpContext.GitPath()
		u.User = url.UserPassword("user2", userPassword)

		t.Run("Clone", doGitClone(dstPath, u))
		doGitCheckoutBranch(dstPath, "-b", "pr-squash-empty", "remotes/origin/pr-squash-empty")(t)
		doGitCheckoutBranch(dstPath, "master")(t)
		_, _, err := gitcmd.NewCommand("cherry-pick").AddArguments("pr-squash-empty").
			RunStdString(t.Context(), &gitcmd.RunOpts{
				Dir: dstPath,
			})
		assert.NoError(t, err)

		doGitPushTestRepository(dstPath)(t)

		testPullMerge(t, session, elem[1], elem[2], elem[4], repo_model.MergeStyleSquash, false)
	})
}