import { CompleteStrategy } from './index';
import { SyntaxNode } from '@lezer/common';
import { PrometheusClient } from '../client';
import { CompletionContext, CompletionResult } from '@codemirror/autocomplete';
import { EditorState } from '@codemirror/state';
import { Matcher } from '../types';
export declare const METRIC_NAME_LABELS: readonly string[];
export interface MetricNameResult {
    metricName: string;
    definingMatchers: Matcher | null;
}
export declare enum ContextKind {
    MetricName = 0,
    LabelName = 1,
    LabelValue = 2,
    Function = 3,
    Aggregation = 4,
    BinOpModifier = 5,
    BinOp = 6,
    MatchOp = 7,
    AggregateOpModifier = 8,
    Duration = 9,
    Offset = 10,
    Bool = 11,
    AtModifiers = 12,
    Number = 13
}
export interface Context {
    kind: ContextKind;
    metricName?: string;
    labelName?: string;
    matchers?: Matcher[];
}
export declare function getMetricNameInVectorSelector(tree: SyntaxNode, state: EditorState): MetricNameResult;
/**
 * Attempts to extract the metric name from a label matcher block such as:
 * `{__name__="http_requests_total"}`.
 *
 * This is a fallback strategy when the metric name is not provided as an identifier
 * but instead is stored as a label matcher using one of the metric-defining labels
 * (e.g., `__name__` or custom labels defined in `METRIC_NAME_LABELS`)
 *
 * It only considers exact match expressions like `__name__="metric"` and ignores
 * regex matches (`=~`, `!~`) or inequality operators (`!=`, `<`, etc).
 *
 * Useful when autocompleting or analyzing metric selectors in PromQL syntax trees.
 */
export declare function findMetricNameInLabelMatchers(labelMatchers: SyntaxNode | null, state: EditorState): MetricNameResult;
export declare function computeStartCompletePosition(state: EditorState, node: SyntaxNode, pos: number): number;
export declare function analyzeCompletion(state: EditorState, node: SyntaxNode, pos: number): Context[];
export declare class HybridComplete implements CompleteStrategy {
    private readonly prometheusClient;
    private readonly maxMetricsMetadata;
    constructor(prometheusClient?: PrometheusClient, maxMetricsMetadata?: number);
    getPrometheusClient(): PrometheusClient | undefined;
    promQL(context: CompletionContext): Promise<CompletionResult | null> | CompletionResult | null;
    private autocompleteMetricName;
    private autocompleteLabelName;
    private autocompleteLabelValue;
    destroy(): void;
}