// Copyright 2019 Drone.IO Inc. All rights reserved.
// Use of this source code is governed by the Drone Non-Commercial License
// that can be found in the LICENSE file.

package batch

import (
	"context"
	"database/sql"
	"testing"

	"github.com/drone/drone/core"
	"github.com/drone/drone/store/perm"
	"github.com/drone/drone/store/repos"
	"github.com/drone/drone/store/shared/db"
	"github.com/drone/drone/store/shared/db/dbtest"
	"github.com/drone/drone/store/shared/encrypt"
	"github.com/drone/drone/store/user"
)

var noContext = context.TODO()

func TestBatch(t *testing.T) {
	conn, err := dbtest.Connect()
	if err != nil {
		t.Error(err)
		return
	}
	defer func() {
		dbtest.Reset(conn)
		dbtest.Disconnect(conn)
	}()

	batcher := New(conn).(*batchUpdater)
	repos := repos.New(conn)
	perms := perm.New(conn)

	user, err := seedUser(batcher.db)
	if err != nil {
		t.Error(err)
	}

	t.Run("Insert", testBatchInsert(batcher, repos, perms, user))
	t.Run("Update", testBatchUpdate(batcher, repos, perms, user))
	t.Run("Delete", testBatchDelete(batcher, repos, perms, user))
	t.Run("DuplicateID", testBatchDuplicateID(batcher, repos, perms, user))
	t.Run("DuplicateSlug", testBatchDuplicateSlug(batcher, repos, perms, user))
	t.Run("DuplicateRename", testBatchDuplicateRename(batcher, repos, perms, user))
}

func testBatchInsert(
	batcher core.Batcher,
	repos core.RepositoryStore,
	perms core.PermStore,
	user *core.User,
) func(t *testing.T) {
	return func(t *testing.T) {
		batch := &core.Batch{
			Insert: []*core.Repository{
				{
					UserID:     1,
					UID:        "42",
					Namespace:  "octocat",
					Name:       "hello-world",
					Slug:       "octocat/hello-world",
					Private:    false,
					Visibility: "public",
				},
			},
		}
		err := batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Error(err)
		}

		repo, err := repos.FindName(noContext, "octocat", "hello-world")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		_, err = perms.Find(noContext, repo.UID, user.ID)
		if err != nil {
			t.Errorf("Want permissions, got error %q", err)
		}
	}
}

func testBatchUpdate(
	batcher core.Batcher,
	repos core.RepositoryStore,
	perms core.PermStore,
	user *core.User,
) func(t *testing.T) {
	return func(t *testing.T) {
		before, err := repos.FindName(noContext, "octocat", "hello-world")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		batch := &core.Batch{
			Update: []*core.Repository{
				{
					ID:        before.ID,
					UserID:    1,
					UID:       "42",
					Namespace: "octocat",
					Name:      "hello-world",
					Slug:      "octocat/hello-world",
					Private:   true,
				},
			},
		}

		err = batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Error(err)
		}

		after, err := repos.FindName(noContext, "octocat", "hello-world")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		if got, want := after.Private, true; got != want {
			t.Errorf("Want repository Private %v, got %v", want, got)
		}
	}
}

func testBatchDelete(
	batcher core.Batcher,
	repos core.RepositoryStore,
	perms core.PermStore,
	user *core.User,
) func(t *testing.T) {
	return func(t *testing.T) {
		repo, err := repos.FindName(noContext, "octocat", "hello-world")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		_, err = perms.Find(noContext, repo.UID, user.ID)
		if err != nil {
			t.Errorf("Want permissions, got error %q", err)
		}

		batch := &core.Batch{
			Revoke: []*core.Repository{
				{
					ID:        repo.ID,
					UserID:    1,
					UID:       "42",
					Namespace: "octocat",
					Name:      "hello-world",
					Slug:      "octocat/hello-world",
					Private:   true,
				},
			},
		}

		err = batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Error(err)
		}

		_, err = perms.Find(noContext, repo.UID, user.ID)
		if err != sql.ErrNoRows {
			t.Errorf("Want sql.ErrNoRows got %v", err)
		}
	}
}

func testBatchDuplicateID(
	batcher core.Batcher,
	repos core.RepositoryStore,
	perms core.PermStore,
	user *core.User,
) func(t *testing.T) {
	return func(t *testing.T) {
		before, err := repos.FindName(noContext, "octocat", "hello-world")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		batch := &core.Batch{
			Insert: []*core.Repository{
				{
					ID:        0,
					UserID:    1,
					UID:       "43", // Updated ID
					Namespace: "octocat",
					Name:      "hello-world",
					Slug:      "octocat/hello-world",
				},
				{
					ID:        0,
					UserID:    1,
					UID:       "43", // Updated ID
					Namespace: "octocat",
					Name:      "hello-world",
					Slug:      "octocat/hello-world",
				},
				{
					ID:        0,
					UserID:    1,
					UID:       "64778136",
					Namespace: "octocat",
					Name:      "linguist",
					Slug:      "octocat/linguist",
				},
			},
			Update: []*core.Repository{
				{
					ID:        before.ID,
					UserID:    1,
					UID:       "44", // Updated ID
					Namespace: "octocat",
					Name:      "hello-world",
					Slug:      "octocat/hello-world",
					Private:   true,
				},
			},
		}

		err = batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Error(err)
		}

		added, err := repos.FindName(noContext, "octocat", "linguist")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		if got, want := added.UID, "64778136"; got != want {
			t.Errorf("Want added repository UID %v, got %v", want, got)
		}
	}
}

// the purpose of this unit test is to understand what happens
// when a repository is deleted, re-created with the same name,
// but has a different unique identifier.
func testBatchDuplicateSlug(
	batcher core.Batcher,
	repos core.RepositoryStore,
	perms core.PermStore,
	user *core.User,
) func(t *testing.T) {
	return func(t *testing.T) {
		_, err := repos.FindName(noContext, "octocat", "hello-world")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
		}

		batch := &core.Batch{
			Insert: []*core.Repository{
				{
					ID:        0,
					UserID:    1,
					UID:       "99", // Updated ID
					Namespace: "octocat",
					Name:      "hello-world",
					Slug:      "octocat/hello-world",
				},
			},
		}
		err = batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Error(err)
		}
	}
}

// the purpose of this unit test is to understand what happens
// when a repository is deleted, re-created with a new name, and
// then updated back to the old name.
//
// TODO(bradrydzewski) for sqlite consider UPDATE OR REPLACE.
// TODO(bradrydzewski) for mysql consider UPDATE IGNORE.
// TODO(bradrydzewski) consider breaking rename into a separate set of logic that checks for existing records.
func testBatchDuplicateRename(
	batcher core.Batcher,
	repos core.RepositoryStore,
	perms core.PermStore,
	user *core.User,
) func(t *testing.T) {
	return func(t *testing.T) {
		batch := &core.Batch{
			Insert: []*core.Repository{
				{
					ID:        0,
					UserID:    1,
					UID:       "200",
					Namespace: "octocat",
					Name:      "test-1",
					Slug:      "octocat/test-1",
				},
				{
					ID:        0,
					UserID:    1,
					UID:       "201",
					Namespace: "octocat",
					Name:      "test-2",
					Slug:      "octocat/test-2",
				},
			},
		}
		err := batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Error(err)
			return
		}

		before, err := repos.FindName(noContext, "octocat", "test-2")
		if err != nil {
			t.Errorf("Want repository, got error %q", err)
			return
		}
		before.Name = "test-1"
		before.Slug = "octocat/test-1"

		batch = &core.Batch{
			Update: []*core.Repository{before},
		}
		err = batcher.Batch(noContext, user, batch)
		if err != nil {
			t.Skip(err)
		}
	}
}

func seedUser(db *db.DB) (*core.User, error) {
	enc, _ := encrypt.New("")
	out := &core.User{Login: "octocat"}
	err := user.New(db, enc).Create(noContext, out)
	return out, err
}