import { ref, shallowRef } from "vue";
import type { TreeNode } from "@/types/database";
import type { PasteTableMode } from "@/lib/table/tableClipboard";
import { fallbackCreateDatabaseCharsetMetadata } from "@/lib/database/createDatabaseCharsetOptions";
import type { DatabaseUserIdentity } from "@/lib/database/databaseUserAdmin";
import type { AuthorizationPlan, AuthorizationStepResult } from "@/lib/database/databaseAuthorizationPlan";
import type { MongoCreateIndexForm, MongoIndexRow } from "@/lib/sidebar/mongoCollectionMutation";
import type { TableVGroupScope } from "@/lib/table/tableVGroup";

export type DuplicateStructureSource = TreeNode & { connectionId: string; database: string };
type ConnectionDeleteTarget = TreeNode & { connectionId: string };
type ConnectionGroupDeleteTarget = TreeNode & { type: "connection-group" };

export const fallbackCreateDatabaseCharset = fallbackCreateDatabaseCharsetMetadata();

export const sidebarTreeDialogOwner = shallowRef<symbol | null>(null);
export const sidebarDangerTarget = shallowRef<TreeNode | null>(null);
export const sidebarDangerRunningExecutionId = ref<string>("");
export const sidebarDangerRunningCancel = ref<(() => void | Promise<void>) | null>(null);
export const sidebarFormTarget = shallowRef<TreeNode | null>(null);
export const connectionDeleteTargetSnapshot = ref<ConnectionDeleteTarget[]>([]);
export const connectionGroupDeleteTargetSnapshot = ref<ConnectionGroupDeleteTarget[]>([]);
export const deleteConnectionsWithGroup = ref(false);
export const showTableVGroupDialog = ref(false);
export const tableVGroupName = ref("");
/** Scope snapshot + creation payload for the table vgroup naming dialog. */
export const tableVGroupDialogScope = shallowRef<TableVGroupScope | null>(null);
export const tableVGroupDialogParentGroupId = ref<string | null>(null);
export const tableVGroupDialogTableNames = ref<string[]>([]);
export const showTableVGroupDeleteConfirm = ref(false);
/** Scope + group snapshot for the table vgroup delete confirmation. */
export const tableVGroupDeleteTarget = shallowRef<{ scope: TableVGroupScope; groupId: string; name: string } | null>(null);
export const showDeleteConfirm = ref(false);
export const showDropTableConfirm = ref(false);
export const showDropTableChildObjectConfirm = ref(false);
export const showBatchDropConfirm = ref(false);
export const showBatchEmptyConfirm = ref(false);
export const showBatchTruncateConfirm = ref(false);
export const showStructurePreviewDialog = ref(false);
export const showStructureDocCopyDialog = ref(false);
export const structurePreviewSql = ref("");
export const structurePreviewHasOceanBase = ref(false);
export const structurePreviewTitle = ref("");
export const structurePreviewDefaultFileName = ref("structure.sql");
export const structurePreviewError = ref("");
export const structureDocCopyText = ref("");
export const structureDocCopyTitle = ref("");
export const isLoadingStructurePreview = ref(false);
export const showEmptyTableConfirm = ref(false);
export const showTruncateTableConfirm = ref(false);
export const showVacuumTableConfirm = ref(false);
export const showMysqlAutoIncrementConfirm = ref(false);
export const showBatchMysqlAutoIncrementConfirm = ref(false);
export const batchMysqlAutoIncrementTargets = ref<TreeNode[]>([]);
export const batchMysqlAutoIncrementPreviewSql = ref("");
export const showRenameObjectDialog = ref(false);
export const renameObjectName = ref("");
export const renameObjectError = ref("");
export const renameObjectPreviewSql = ref("");
export const dropTablePreviewSql = ref("");
export const dropTableCascade = ref(false);
export const batchDropCascade = ref(false);
export const emptyTablePreviewSql = ref("");
export const truncateTablePreviewSql = ref("");
export const truncateTableCascade = ref(false);
export const vacuumTableFull = ref(false);
export const vacuumTableAnalyze = ref(false);
export const vacuumTablePreviewSql = ref("");
export const vacuumTablePreviewKey = ref("");
export const vacuumTableExecuting = ref(false);
export const mysqlAutoIncrementValue = ref("1");
export const mysqlAutoIncrementPreviewSql = ref("");
export const mysqlAutoIncrementPreviewKey = ref("");
export const dropObjectPreviewSql = ref("");
export const showDropObjectConfirm = ref(false);
export const dropTableChildObjectPreviewSql = ref("");
export const batchDropPreviewSql = ref("");
export const batchEmptyPreviewSql = ref("");
export const batchEmptyTargets = ref<TreeNode[]>([]);
export const batchDropTargets = ref<TreeNode[]>([]);
export const batchTruncateTargets = ref<TreeNode[]>([]);
export const batchTruncatePreviewSql = ref("");
export const batchTruncateCascade = ref(false);
export const dropDatabasePreviewSql = ref("");
export const dropSchemaPreviewSql = ref("");
export const showDuplicateDialog = ref(false);
export const duplicateTableName = ref("");
export const duplicateStructureSource = ref<DuplicateStructureSource | null>(null);
export const showPasteDialog = ref(false);
export const pasteTableMode = ref<PasteTableMode>("structure-and-data");
export const pasteTableEntries = ref<Array<{ sourceName: string; targetName: string; connectionId: string; database: string; schema?: string; tableComment?: string | null }>>([]);
export const showCreateDatabaseDialog = ref(false);
export const createDatabaseName = ref("");
export const createDatabaseCharset = ref("utf8mb4");
export const createDatabaseCollation = ref("utf8mb4_unicode_ci");
export const createDatabaseUsers = ref<DatabaseUserIdentity[]>([]);
export const createDatabaseSelectedUsers = ref<DatabaseUserIdentity[]>([]);
export const createDatabaseUsersLoading = ref(false);
export const showCreateDatabasePreviewDialog = ref(false);
export const createDatabaseAuthorizationPlan = ref<AuthorizationPlan>();
export const createDatabasePreviewSql = ref("");
export const createDatabaseAuthorizationResults = ref<AuthorizationStepResult[]>([]);
export const createDatabaseAuthorizationApplying = ref(false);
export const showCreateNacosNamespaceDialog = ref(false);
export const createNacosNamespaceId = ref("");
export const createNacosNamespaceName = ref("");
export const createNacosNamespaceDesc = ref("");
export const createNacosNamespaceLoading = ref(false);
export const showEditNacosNamespaceDialog = ref(false);
export const editNacosNamespaceName = ref("");
export const editNacosNamespaceDesc = ref("");
export const editNacosNamespaceLoading = ref(false);
export const showDeleteNacosNamespaceConfirm = ref(false);
export const deleteNacosNamespaceLoading = ref(false);
export const createDatabaseCharsetOptions = ref<string[]>(fallbackCreateDatabaseCharset.charsets);
export const createDatabaseCollationsByCharset = ref<Record<string, string[]>>(fallbackCreateDatabaseCharset.collationsByCharset);
export const createDatabaseCharsetLoading = ref(false);
export const showDropDatabaseConfirm = ref(false);
export const dropDatabaseLoading = ref(false);
export const showDropMongoCollectionConfirm = ref(false);
export const dropMongoCollectionLoading = ref(false);
export const showRenameMongoCollectionDialog = ref(false);
export const renameMongoCollectionName = ref("");
export const renameMongoCollectionError = ref("");
export const renameMongoCollectionPreview = ref("");
export const renameMongoCollectionLoading = ref(false);
export const showCloneMongoCollectionDialog = ref(false);
export const cloneMongoCollectionName = ref("");
export const cloneMongoCollectionError = ref("");
export const cloneMongoCollectionLoading = ref(false);
export const showDropMongoIndexConfirm = ref(false);
export const dropMongoIndexLoading = ref(false);
export const showDropAllMongoIndexesConfirm = ref(false);
export const dropAllMongoIndexesLoading = ref(false);
export const showCreateMongoIndexDialog = ref(false);

function emptyMongoCreateIndexForm(): MongoCreateIndexForm {
  return {
    name: "",
    fields: [{ id: 1, path: "", type: "1" }],
    unique: false,
    sparse: false,
    expireAfterSeconds: "",
    partialFilterExpression: "",
    background: false,
    bucketSize: "",
    hidden: false,
  };
}

export const mongoCreateIndexForm = ref<MongoCreateIndexForm>(emptyMongoCreateIndexForm());
export const mongoCreateIndexFieldOptions = ref<string[]>([]);
export const mongoCreateIndexError = ref("");
export const mongoCreateIndexLoading = ref(false);

export function resetMongoCreateIndexForm() {
  mongoCreateIndexForm.value = emptyMongoCreateIndexForm();
  mongoCreateIndexFieldOptions.value = [];
  mongoCreateIndexError.value = "";
  mongoCreateIndexLoading.value = false;
}

export const showMongoIndexManagerDialog = ref(false);
export const mongoIndexManagerRows = ref<MongoIndexRow[]>([]);
export const mongoIndexManagerLoading = ref(false);
export const mongoIndexManagerError = ref("");
export const mongoIndexManagerSelectedName = ref("");
export const mongoIndexManagerMode = ref<"view" | "create" | "edit">("view");
/** Name of the index being edited, so the confirm step knows which one to drop. */
export const mongoEditIndexOriginalName = ref("");

export function resetMongoIndexManager() {
  mongoIndexManagerRows.value = [];
  mongoIndexManagerLoading.value = false;
  mongoIndexManagerError.value = "";
  mongoIndexManagerSelectedName.value = "";
  mongoIndexManagerMode.value = "view";
  mongoEditIndexOriginalName.value = "";
}
export const showClearElasticsearchIndexConfirm = ref(false);
export const clearElasticsearchIndexLoading = ref(false);
/** Name typed back by the operator before a wildcard index node may be cleared. */
export const clearElasticsearchIndexTypedName = ref("");
export const showFlushRedisDbConfirm = ref(false);
export const showRedisDatabaseAliasDialog = ref(false);
export const redisDatabaseAliasInput = ref("");
export const redisDatabaseAliasSaving = ref(false);
export const showCreateSchemaDialog = ref(false);
export const createSchemaName = ref("");
export const showDropSchemaConfirm = ref(false);
export const showEditDatabasePropertiesDialog = ref(false);
export const editDatabasePropertiesLoading = ref(false);
export const editDatabasePropertiesPreviewSql = ref("");
export const editDatabaseCharset = ref("utf8mb4");
export const editDatabaseCollation = ref("utf8mb4_unicode_ci");
export const editDatabaseCommentText = ref("");
export const showEditSchemaCommentDialog = ref(false);
export const showCompileErrorDialog = ref(false);
export const compileErrorTitle = ref("");
export const compileErrorMessage = ref("");
export const schemaCommentText = ref("");
export const schemaCommentLoading = ref(false);
export const schemaCommentPreviewSql = ref("");
export const showDeleteGroupConfirm = ref(false);
export const showMoveToNewGroupDialog = ref(false);
export const moveToNewGroupName = ref("");

const openFlags = [
  showDeleteConfirm,
  showDropTableConfirm,
  showDropTableChildObjectConfirm,
  showBatchDropConfirm,
  showBatchEmptyConfirm,
  showBatchTruncateConfirm,
  showStructurePreviewDialog,
  showStructureDocCopyDialog,
  showEmptyTableConfirm,
  showTruncateTableConfirm,
  showVacuumTableConfirm,
  showMysqlAutoIncrementConfirm,
  showBatchMysqlAutoIncrementConfirm,
  showDropObjectConfirm,
  showRenameObjectDialog,
  showDuplicateDialog,
  showPasteDialog,
  showCreateDatabaseDialog,
  showCreateDatabasePreviewDialog,
  showCreateNacosNamespaceDialog,
  showEditNacosNamespaceDialog,
  showDropDatabaseConfirm,
  showDropMongoCollectionConfirm,
  showRenameMongoCollectionDialog,
  showCloneMongoCollectionDialog,
  showDropMongoIndexConfirm,
  showDropAllMongoIndexesConfirm,
  showCreateMongoIndexDialog,
  showMongoIndexManagerDialog,
  showClearElasticsearchIndexConfirm,
  showFlushRedisDbConfirm,
  showRedisDatabaseAliasDialog,
  showCreateSchemaDialog,
  showDropSchemaConfirm,
  showEditDatabasePropertiesDialog,
  showEditSchemaCommentDialog,
  showCompileErrorDialog,
  showDeleteGroupConfirm,
  showMoveToNewGroupDialog,
  showTableVGroupDialog,
  showTableVGroupDeleteConfirm,
];

export function resetSidebarTreeDialogState() {
  for (const flag of openFlags) flag.value = false;
  compileErrorTitle.value = "";
  compileErrorMessage.value = "";
  createDatabaseUsers.value = [];
  createDatabaseSelectedUsers.value = [];
  createDatabaseUsersLoading.value = false;
  createDatabaseAuthorizationPlan.value = undefined;
  createDatabasePreviewSql.value = "";
  createDatabaseAuthorizationResults.value = [];
  createDatabaseAuthorizationApplying.value = false;
  clearElasticsearchIndexLoading.value = false;
  clearElasticsearchIndexTypedName.value = "";
  redisDatabaseAliasInput.value = "";
  redisDatabaseAliasSaving.value = false;
  cloneMongoCollectionName.value = "";
  cloneMongoCollectionError.value = "";
  cloneMongoCollectionLoading.value = false;
  resetMongoCreateIndexForm();
  resetMongoIndexManager();
  vacuumTableExecuting.value = false;
  sidebarTreeDialogOwner.value = null;
  sidebarDangerTarget.value = null;
  sidebarFormTarget.value = null;
  sidebarDangerRunningExecutionId.value = "";
  sidebarDangerRunningCancel.value = null;
  connectionDeleteTargetSnapshot.value = [];
  connectionGroupDeleteTargetSnapshot.value = [];
  deleteConnectionsWithGroup.value = false;
  tableVGroupDialogScope.value = null;
  tableVGroupDialogParentGroupId.value = null;
  tableVGroupDialogTableNames.value = [];
}