package ags

import (
	"strconv"
	"testing"

	"github.com/pingcap/agent-git-service/internal/db"
	"github.com/pingcap/agent-git-service/internal/service"
	reposync "github.com/pingcap/agent-git-service/internal/sync"
	"github.com/pingcap/agent-git-service/internal/sync/canonical"
	"github.com/pingcap/agent-git-service/internal/testharness"
)

func TestIsEmptyIgnoresTargetDefaultLabels(t *testing.T) {
	svc, tenantHandle, cleanup := testharness.NewService(t, testharness.ServiceConfig{})
	defer cleanup()
	ctx := tenantHandle.Context()
	owner := db.User{Login: "empty-provider-owner", Name: "empty-provider-owner", Type: db.TypeUser, UserKind: db.UserKindHuman, Status: db.UserStatusActive}
	if err := svc.DBForCtx(ctx).Create(&owner).Error; err != nil {
		t.Fatalf("create owner: %v", err)
	}
	ownerCtx, err := service.ContextWithUserForTest(ctx, owner)
	if err != nil {
		t.Fatal(err)
	}
	repository, err := svc.CreateRepo(ownerCtx, service.CreateRepoInput{OwnerLogin: owner.Login, Name: "empty-target"})
	if err != nil {
		t.Fatalf("create repository: %v", err)
	}
	// AGS may provision labels before any team data exists. They must not turn an
	// otherwise empty target into a slow, per-object baseline comparison.
	if err := svc.DBForCtx(ctx).Create(&db.Label{RepositoryID: repository.ID, Name: "sync-default-label", Color: "d73a4a"}).Error; err != nil {
		t.Fatalf("create default label: %v", err)
	}
	provider, err := (&Factory{Service: svc}).Open(ctx, reposync.Endpoint{
		Provider: service.SyncProviderAGS, AGSRepositoryID: repository.ID,
		RepositoryID: strconv.FormatUint(uint64(repository.ID), 10), RepositoryFullName: repository.FullName,
	})
	if err != nil {
		t.Fatalf("open provider: %v", err)
	}
	empty, err := provider.(reposync.EmptyChecker).IsEmpty(ctx)
	if err != nil || !empty {
		t.Fatalf("empty with labels = %t, %v", empty, err)
	}
	if err := svc.DBForCtx(ctx).Create(&db.Issue{RepositoryID: repository.ID, Number: 1, Title: "business data", State: "open", AuthorID: owner.ID}).Error; err != nil {
		t.Fatalf("create issue: %v", err)
	}
	empty, err = provider.(reposync.EmptyChecker).IsEmpty(ctx)
	if err != nil || empty {
		t.Fatalf("empty with issue = %t, %v", empty, err)
	}
}

func TestApplyIssuePreservesSourceAuthorDisplayIdentity(t *testing.T) {
	svc, tenantHandle, cleanup := testharness.NewService(t, testharness.ServiceConfig{})
	defer cleanup()
	ctx := tenantHandle.Context()
	owner := db.User{Login: "author-provider-owner", Name: "author-provider-owner", Type: db.TypeUser, UserKind: db.UserKindHuman, Status: db.UserStatusActive}
	if err := svc.DBForCtx(ctx).Create(&owner).Error; err != nil {
		t.Fatalf("create owner: %v", err)
	}
	ownerCtx, err := service.ContextWithUserForTest(ctx, owner)
	if err != nil {
		t.Fatal(err)
	}
	repository, err := svc.CreateRepo(ownerCtx, service.CreateRepoInput{OwnerLogin: owner.Login, Name: "author-target"})
	if err != nil {
		t.Fatalf("create repository: %v", err)
	}
	provider, err := (&Factory{Service: svc}).Open(ctx, reposync.Endpoint{
		Provider: service.SyncProviderAGS, AGSRepositoryID: repository.ID,
		RepositoryID: strconv.FormatUint(uint64(repository.ID), 10), RepositoryFullName: repository.FullName,
	})
	if err != nil {
		t.Fatalf("open provider: %v", err)
	}
	record := canonical.NewRecord(canonical.TypeIssue, "github:42", "issue:42", map[string]any{
		"title": "Preserve source author", "body": "body", "state": "open",
	})
	record.OriginalActor = "hazel1225"
	payload, err := record.Payload()
	if err != nil {
		t.Fatal(err)
	}
	results, err := provider.ApplyBatch(ctx, reposync.PhysicalBatch{
		ObjectType: canonical.TypeIssue, Action: reposync.ActionCreate,
		Items: []reposync.PlannedItem{{
			ObjectType: canonical.TypeIssue, ObjectKey: record.Key, Action: reposync.ActionCreate,
			SourceIdentity: record.Identity, Payload: payload, PayloadBytes: int64(len(payload)),
		}},
	}, nil)
	if err != nil || len(results) != 1 || results[0].ErrorCode != "" {
		t.Fatalf("apply issue results=%#v err=%v", results, err)
	}
	var issue db.Issue
	if err := svc.DBForCtx(ctx).Preload("Author").Where("repository_id = ?", repository.ID).First(&issue).Error; err != nil {
		t.Fatalf("load issue: %v", err)
	}
	if issue.Author.Login != "hazel1225" {
		t.Fatalf("issue author=%q, want source GitHub author", issue.Author.Login)
	}
}