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

package git_test

import (
	"context"
	"testing"
	"time"

	"code.gitea.io/gitea/models/db"
	git_model "code.gitea.io/gitea/models/git"
	issues_model "code.gitea.io/gitea/models/issues"
	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/modules/git"
	"code.gitea.io/gitea/modules/optional"
	"code.gitea.io/gitea/modules/timeutil"

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

func TestAddDeletedBranch(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
	assert.Equal(t, git.Sha1ObjectFormat.Name(), repo.ObjectFormatName)
	firstBranch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{ID: 1})

	assert.True(t, firstBranch.IsDeleted)
	assert.NoError(t, git_model.AddDeletedBranch(t.Context(), repo.ID, firstBranch.Name, firstBranch.DeletedByID))
	assert.NoError(t, git_model.AddDeletedBranch(t.Context(), repo.ID, "branch2", int64(1)))

	secondBranch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo.ID, Name: "branch2"})
	assert.True(t, secondBranch.IsDeleted)

	commit := &git.Commit{
		ID:            git.MustIDFromString(secondBranch.CommitID),
		CommitMessage: secondBranch.CommitMessage,
		Committer: &git.Signature{
			When: secondBranch.CommitTime.AsLocalTime(),
		},
	}

	_, err := git_model.UpdateBranch(t.Context(), repo.ID, secondBranch.PusherID, secondBranch.Name, commit)
	assert.NoError(t, err)
}

func TestGetDeletedBranches(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})

	branches, err := db.Find[git_model.Branch](t.Context(), git_model.FindBranchOptions{
		ListOptions:     db.ListOptionsAll,
		RepoID:          repo.ID,
		IsDeletedBranch: optional.Some(true),
	})
	assert.NoError(t, err)
	assert.Len(t, branches, 2)
}

func TestGetDeletedBranch(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	firstBranch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{ID: 1})

	assert.NotNil(t, getDeletedBranch(t, firstBranch))
}

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

	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 10})
	doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 12})
	branch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo.ID, Name: "outdated-new-branch"})

	commitUnix := time.Now().Add(-3 * time.Hour).Unix()
	pushUnix := time.Now().Add(-30 * time.Minute).Unix()
	_, err := db.GetEngine(t.Context()).Exec(
		"UPDATE branch SET commit_time = ?, updated_unix = ? WHERE id = ?",
		commitUnix,
		pushUnix,
		branch.ID,
	)
	assert.NoError(t, err)

	branches, err := git_model.FindRecentlyPushedNewBranches(t.Context(), doer, git_model.FindRecentlyPushedNewBranchesOptions{
		Repo:            repo,
		BaseRepo:        repo,
		PushedAfterUnix: time.Now().Add(-time.Hour).Unix(),
		MaxCount:        1,
	})
	assert.NoError(t, err)
	if assert.Len(t, branches, 1) {
		assert.Equal(t, branch.Name, branches[0].BranchName)
		assert.Equal(t, timeutil.TimeStamp(pushUnix), branches[0].PushedTime)
	}
}

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

	firstBranch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{ID: 1})
	secondBranch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{ID: 2})

	branch := getDeletedBranch(t, firstBranch)
	assert.Nil(t, branch.DeletedBy)
	branch.LoadDeletedBy(t.Context())
	assert.NotNil(t, branch.DeletedBy)
	assert.Equal(t, "user1", branch.DeletedBy.Name)

	branch = getDeletedBranch(t, secondBranch)
	assert.Nil(t, branch.DeletedBy)
	branch.LoadDeletedBy(t.Context())
	assert.NotNil(t, branch.DeletedBy)
	assert.Equal(t, "Ghost", branch.DeletedBy.Name)
}

func TestRemoveDeletedBranch(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})

	firstBranch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{ID: 1})

	err := git_model.RemoveDeletedBranchByID(t.Context(), repo.ID, 1)
	assert.NoError(t, err)
	unittest.AssertNotExistsBean(t, firstBranch)
	unittest.AssertExistsAndLoadBean(t, &git_model.Branch{ID: 2})
}

func getDeletedBranch(t *testing.T, branch *git_model.Branch) *git_model.Branch {
	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})

	deletedBranch, err := git_model.GetDeletedBranchByID(t.Context(), repo.ID, branch.ID)
	assert.NoError(t, err)
	assert.Equal(t, branch.ID, deletedBranch.ID)
	assert.Equal(t, branch.Name, deletedBranch.Name)
	assert.Equal(t, branch.CommitID, deletedBranch.CommitID)
	assert.Equal(t, branch.DeletedByID, deletedBranch.DeletedByID)

	return deletedBranch
}

func TestFindRenamedBranch(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	branch, exist, err := git_model.FindRenamedBranch(t.Context(), 1, "dev")
	assert.NoError(t, err)
	assert.True(t, exist)
	assert.Equal(t, "master", branch.To)

	_, exist, err = git_model.FindRenamedBranch(t.Context(), 1, "unknown")
	assert.NoError(t, err)
	assert.False(t, exist)
}

func TestRenameBranch(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
	_isDefault := false

	ctx, committer, err := db.TxContext(t.Context())
	defer committer.Close()
	assert.NoError(t, err)
	assert.NoError(t, git_model.UpdateProtectBranch(ctx, repo1, &git_model.ProtectedBranch{
		RepoID:   repo1.ID,
		RuleName: "master",
	}, git_model.WhitelistOptions{}))
	assert.NoError(t, committer.Commit())

	assert.NoError(t, git_model.RenameBranch(t.Context(), repo1, "master", "main", func(ctx context.Context, isDefault bool) error {
		_isDefault = isDefault
		return nil
	}))

	assert.True(t, _isDefault)
	repo1 = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
	assert.Equal(t, "main", repo1.DefaultBranch)

	pull := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 1}) // merged
	assert.Equal(t, "master", pull.BaseBranch)

	pull = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2}) // open
	assert.Equal(t, "main", pull.BaseBranch)

	renamedBranch := unittest.AssertExistsAndLoadBean(t, &git_model.RenamedBranch{ID: 2})
	assert.Equal(t, "master", renamedBranch.From)
	assert.Equal(t, "main", renamedBranch.To)
	assert.Equal(t, int64(1), renamedBranch.RepoID)

	unittest.AssertExistsAndLoadBean(t, &git_model.ProtectedBranch{
		RepoID:   repo1.ID,
		RuleName: "main",
	})
}

func TestRenameBranchProtectedRuleConflict(t *testing.T) {
	assert.NoError(t, unittest.PrepareTestDatabase())
	repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
	master := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo1.ID, Name: "master"})

	devBranch := &git_model.Branch{
		RepoID:        repo1.ID,
		Name:          "dev",
		CommitID:      master.CommitID,
		CommitMessage: master.CommitMessage,
		CommitTime:    master.CommitTime,
		PusherID:      master.PusherID,
	}
	assert.NoError(t, db.Insert(t.Context(), devBranch))

	pbDev := git_model.ProtectedBranch{
		RepoID:   repo1.ID,
		RuleName: "dev",
		CanPush:  true,
	}
	assert.NoError(t, git_model.UpdateProtectBranch(t.Context(), repo1, &pbDev, git_model.WhitelistOptions{}))

	pbMain := git_model.ProtectedBranch{
		RepoID:   repo1.ID,
		RuleName: "main",
		CanPush:  true,
	}
	assert.NoError(t, git_model.UpdateProtectBranch(t.Context(), repo1, &pbMain, git_model.WhitelistOptions{}))

	assert.NoError(t, git_model.RenameBranch(t.Context(), repo1, "dev", "main", func(ctx context.Context, isDefault bool) error {
		return nil
	}))

	unittest.AssertNotExistsBean(t, &git_model.Branch{RepoID: repo1.ID, Name: "dev"})
	unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo1.ID, Name: "main"})

	protectedDev, err := git_model.GetProtectedBranchRuleByName(t.Context(), repo1.ID, "dev")
	assert.NoError(t, err)
	assert.NotNil(t, protectedDev)
	assert.Equal(t, "dev", protectedDev.RuleName)

	protectedMainByID, err := git_model.GetProtectedBranchRuleByID(t.Context(), repo1.ID, pbMain.ID)
	assert.NoError(t, err)
	assert.NotNil(t, protectedMainByID)
	assert.Equal(t, "main", protectedMainByID.RuleName)
}

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

	// Get deletedBranch with ID of 1 on repo with ID 2.
	// This should return a nil branch as this deleted branch
	// is actually on repo with ID 1.
	repo2 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 2})

	deletedBranch, err := git_model.GetDeletedBranchByID(t.Context(), repo2.ID, 1)

	// Expect error, and the returned branch is nil.
	assert.Error(t, err)
	assert.Nil(t, deletedBranch)

	// Now get the deletedBranch with ID of 1 on repo with ID 1.
	// This should return the deletedBranch.
	repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})

	deletedBranch, err = git_model.GetDeletedBranchByID(t.Context(), repo1.ID, 1)

	// Expect no error, and the returned branch to be not nil.
	assert.NoError(t, err)
	assert.NotNil(t, deletedBranch)
}

func TestCountBranches(t *testing.T) {
	// 1. Setup - Exactly like TestAddDeletedBranch
	assert.NoError(t, unittest.PrepareTestDatabase())
	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})

	// 2. Execution - Using t.Context() to match the rest of the file
	initialCount, err := git_model.CountBranches(t.Context(), repo.ID, false)
	assert.NoError(t, err)

	// 3. Database Action - Using t.Context()
	err = db.Insert(t.Context(), &git_model.Branch{
		RepoID: repo.ID,
		Name:   "test-branch-for-counting",
	})
	assert.NoError(t, err)

	// 4. Verification
	newCount, err := git_model.CountBranches(t.Context(), repo.ID, false)
	assert.NoError(t, err)
	assert.Equal(t, initialCount+1, newCount)
}