import { CompositeTreeNode, TreeNode } from '@theia/core/lib/browser/tree/tree';
import { SelectableTreeNode } from '@theia/core/lib/browser/tree/tree-selection';
import { AiConfigurationCategory, AiConfigurationItemStatus } from '@theia/ai-core-ui/lib/browser/ai-configuration/ai-configuration-category';
/**
 * Top-level node representing a single {@link AiConfigurationCategory}.
 * Carries the `expanded` property (making it an `ExpandableTreeNode`) only when
 * the category is a non-empty collection.
 */
export interface AiConfigurationCategoryNode extends SelectableTreeNode, CompositeTreeNode {
    readonly type: 'category';
    readonly categoryId: string;
    readonly iconClass: string;
    readonly contributed: boolean;
    children: AiConfigurationItemNode[];
    expanded?: boolean;
    selected: boolean;
}
export declare namespace AiConfigurationCategoryNode {
    function is(node: TreeNode | undefined): node is AiConfigurationCategoryNode;
}
/** Child node representing one item of a collection category. */
export interface AiConfigurationItemNode extends SelectableTreeNode {
    readonly type: 'item';
    readonly categoryId: string;
    readonly itemId: string;
    readonly iconClass: string;
    /** The item's state, as the tree shows it: a dot next to the label (e.g. an MCP server that is running). */
    readonly status?: AiConfigurationItemStatus;
    selected: boolean;
}
export declare namespace AiConfigurationItemNode {
    function is(node: TreeNode | undefined): node is AiConfigurationItemNode;
}
/** Non-selectable separator introducing the "Contributed by extensions" group. */
export interface AiConfigurationSeparatorNode extends TreeNode {
    readonly type: 'separator';
}
export declare namespace AiConfigurationSeparatorNode {
    function is(node: TreeNode | undefined): node is AiConfigurationSeparatorNode;
}
export interface AiConfigurationTreeBuildOptions {
    /** Returns the previous expansion state of a category, to preserve it across rebuilds. */
    isExpanded?(categoryId: string): boolean | undefined;
}
/**
 * Builds the (invisible) root of the AI Configuration category tree from the
 * ordered list of categories. Extracted as a pure function so the tree shape
 * (children, separator, expansion) can be tested without a DOM.
 */
export declare namespace AiConfigurationTree {
    const ROOT_ID = "ai-configuration-tree-root";
    const CONTRIBUTED_SEPARATOR_ID = "ai-configuration-contributed-separator";
    function categoryNodeId(categoryId: string): string;
    function itemNodeId(categoryId: string, itemId: string): string;
    function buildRoot(categories: AiConfigurationCategory[], options?: AiConfigurationTreeBuildOptions): CompositeTreeNode;
}
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