package main

import (
	"errors"
	"testing"

	"go.uber.org/mock/gomock"
	"src.opensuse.org/autogits/common"
	"src.opensuse.org/autogits/common/gitea-generated/models"
	mock_common "src.opensuse.org/autogits/common/mock"
)

func TestSyncPR(t *testing.T) {
	config := &common.AutogitConfig{
		Reviewers:      []string{"reviewer1", "reviewer2"},
		Branch:         "testing",
		Organization:   "test-org",
		GitProjectName: "test-prj#testing",
	}

	git := &common.GitHandlerImpl{
		GitCommiter: "tester",
		GitEmail:    "test@suse.com",
		GitPath:     t.TempDir(),
	}

	processor := &PRProcessor{
		config: config,
		git:    git,
	}

	modelPR := &models.PullRequest{
		Index: 42,
		Body:  "PR: test-org/test-prj#24",
		Base: &models.PRBranchInfo{
			Ref: "main",
			Repo: &models.Repository{
				Name:          "test-repo",
				Owner:         &models.User{UserName: "test-org"},
				DefaultBranch: "main",
			},
		},
		Head: &models.PRBranchInfo{
			Ref: "branch",
			Sha: "11eb36d5a58d7bb376cac59ac729a1986c6a7bfc63e7818e14382f545ccda985",
			Repo: &models.Repository{
				Name:          "test-repo",
				Owner:         &models.User{UserName: "test-org"},
				DefaultBranch: "main",
			},
		},
	}

	PrjGitPR := &models.PullRequest{
		Title: "some pull request",
		Body:  "PR: test-org/test-repo#42",
		Index: 24,
		Base: &models.PRBranchInfo{
			Ref: "testing",
			Repo: &models.Repository{
				Name:   "test-prj",
				Owner:  &models.User{UserName: "test-org"},
				SSHURL: "url",
			},
		},
		Head: &models.PRBranchInfo{
			Name: "PR_test-repo#42",
			Sha:  "db8adab91edb476b9762097d10c6379aa71efd6b60933a1c0e355ddacf419a95",
			Repo: &models.Repository{
				SSHURL: "url",
			},
		},
	}

	t.Run("PR_sync_request_against_PrjGit_==_no_action", func(t *testing.T) {
		ctl := gomock.NewController(t)
		defer ctl.Finish()
		gitea := mock_common.NewMockGitea(ctl)
		Gitea = gitea

		// Common expectations for FetchPRSet and downstream checks
		gitea.EXPECT().GetPullRequestReviews(gomock.Any(), gomock.Any(), gomock.Any()).Return([]*models.PullReview{}, nil).AnyTimes()
		gitea.EXPECT().FetchMaintainershipFile(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, "", nil).AnyTimes()
		gitea.EXPECT().FetchMaintainershipDirFile(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, "", nil).AnyTimes()
		gitea.EXPECT().SetRepoOptions(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, nil).AnyTimes()

		prjGitRepoPR := &models.PullRequest{
			Index: 100,
			Base: &models.PRBranchInfo{
				Ref: "testing",
				Repo: &models.Repository{
					Name:  "test-prj",
					Owner: &models.User{UserName: "test-org"},
				},
			},
			Head: &models.PRBranchInfo{
				Ref: "branch",
			},
		}

		gitea.EXPECT().GetPullRequest(gomock.Any(), gomock.Any(), gomock.Any()).Return(prjGitRepoPR, nil).AnyTimes()
		gitea.EXPECT().GetTimeline(gomock.Any(), gomock.Any(), gomock.Any()).Return([]*models.TimelineComment{}, nil).AnyTimes()

		if err := processor.Process(prjGitRepoPR); err != nil {
			t.Errorf("Expected nil error for PrjGit sync request, got %v", err)
		}
	})

	t.Run("Missing PrjGit PR for the sync", func(t *testing.T) {
		ctl := gomock.NewController(t)
		defer ctl.Finish()
		gitea := mock_common.NewMockGitea(ctl)
		Gitea = gitea

		gitea.EXPECT().GetPullRequestReviews(gomock.Any(), gomock.Any(), gomock.Any()).Return([]*models.PullReview{}, nil).AnyTimes()
		gitea.EXPECT().FetchMaintainershipFile(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, "", nil).AnyTimes()
		gitea.EXPECT().FetchMaintainershipDirFile(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, "", nil).AnyTimes()
		gitea.EXPECT().SetRepoOptions(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, nil).AnyTimes()

		gitea.EXPECT().GetTimeline(gomock.Any(), gomock.Any(), gomock.Any()).Return([]*models.TimelineComment{}, nil).AnyTimes()
		gitea.EXPECT().GetPullRequest(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, errors.New("not found")).AnyTimes()

		err := processor.Process(modelPR)
		// It should fail because it can't find the project PR linked in body
		if err == nil {
			t.Errorf("Expected error for missing project PR, got nil")
		}
	})

	t.Run("PR sync", func(t *testing.T) {
		ctl := gomock.NewController(t)
		defer ctl.Finish()
		gitea := mock_common.NewMockGitea(ctl)
		Gitea = gitea

		setupGitForTests(t, git)

		gitea.EXPECT().GetPullRequest(gomock.Any(), gomock.Any(), gomock.Any()).Return(PrjGitPR, nil).AnyTimes()
		gitea.EXPECT().GetTimeline(gomock.Any(), gomock.Any(), gomock.Any()).Return([]*models.TimelineComment{}, nil).AnyTimes()
		gitea.EXPECT().GetPullRequestReviews(gomock.Any(), gomock.Any(), gomock.Any()).Return([]*models.PullReview{}, nil).AnyTimes()
		gitea.EXPECT().FetchMaintainershipFile(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, "", nil).AnyTimes()
		gitea.EXPECT().FetchMaintainershipDirFile(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, "", nil).AnyTimes()
		gitea.EXPECT().SetRepoOptions(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, nil).AnyTimes()

		// For UpdatePrjGitPR
		gitea.EXPECT().UpdatePullRequest(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, nil).AnyTimes()

		err := processor.Process(modelPR)
		if err != nil {
			t.Errorf("Unexpected error: %v", err)
		}
	})
}