import { Config, Scenario, ViewportNext } from 'backstopjs';
import { TestSuiteModel, ScenarioModel, WorkspaceConfig, BasicAuthModel, BasicAuthConfig } from './types.js';
export type ArgConfig = {
    testSuite: string;
    isRef: boolean;
    globalRequiredLogin: boolean;
};
export declare const DEFAULT_VIEWPORTS_PATH = "common/_viewports.yaml";
export declare const DEFAULT_SCENARIO_DELAY = 1000;
export declare const DEFAULT_MISMATCH_THRESHOLD = 0.1;
export declare const DEFAULT_POST_INTERACTION_WAIT = 1;
export declare const DEFAULT_ASYNC_CAPTURE_LIMIT = 5;
export declare const DEFAULT_ASYNC_COMPARE_LIMIT = 50;
export declare class ConfigValidationError extends Error {
    constructor(message: string);
}
export declare function getRequiredTestSuiteArg(args: string[]): string;
export declare function getArgConfigs(args: string[]): ArgConfig[];
export declare function getScriptPath(scriptPath: string, engine: 'puppeteer' | 'playwright'): string;
/**
 * Load workspace-level defaults from `regressify.yaml` (or `.yml`)
 * at the workspace root. The file is optional; when absent an empty
 * object is returned so the cascade always falls back cleanly.
 */
export declare function getWorkspaceConfig(): WorkspaceConfig;
export declare function getData(testSuite: string): TestSuiteModel | undefined;
export declare function resolveStrictBoolean(...values: Array<boolean | undefined>): boolean | undefined;
/**
 * Expand `${VAR}` and `$VAR` references in a string using `env`.
 * Unset variables expand to an empty string. Strings without any
 * reference are returned unchanged. A bare `$VAR` is only treated as a
 * reference when the `$` starts the string or follows a non-word
 * character, so literals such as `pa$ssword` are preserved.
 */
export declare function expandEnvReferences(value: string, env?: NodeJS.ProcessEnv): string;
export declare function normalizeHttpOrigin(value: string): string | undefined;
/**
 * Resolve `basicAuth` across scenario -> suite -> workspace, expanding any
 * environment-variable references in the credentials. Each level may declare
 * a single entry or an array of entries (one per protected origin). Entries
 * from more specific levels override less specific ones with the same
 * normalized origin, so a scenario can override one origin's credentials
 * while still inheriting the rest from the suite or workspace. Invalid
 * entries are dropped; returns `undefined` when no valid entry remains.
 */
export declare function resolveBasicAuth(scenario?: BasicAuthConfig, suite?: BasicAuthConfig, workspace?: BasicAuthConfig, env?: NodeJS.ProcessEnv): BasicAuthModel[] | undefined;
export declare function expandScenarios(model: ScenarioModel, scenarios: ScenarioModel[], level: number, trail?: string[]): void;
/**
 * Resolve `viewportNames` across scenario → suite → workspace, then
 * filter the loaded viewport definitions accordingly.
 */
export declare function resolveViewports(s: ScenarioModel, data: TestSuiteModel, ws: WorkspaceConfig, viewports?: ViewportNext[]): ViewportNext[] | undefined;
type ResolveScenarioOptionsInput = {
    args: string[];
    scenario: ScenarioModel;
    suite: TestSuiteModel;
    workspace: WorkspaceConfig;
    testSuite: string;
    isRef: boolean;
    globalRequiredLogin: boolean;
    index: number;
    total: number;
    viewports?: ViewportNext[];
};
export declare function resolveScenarioOptions({ args, scenario, suite, workspace, testSuite, isRef, globalRequiredLogin, index, total, viewports, }: ResolveScenarioOptionsInput): ScenarioModel;
export declare function getScenarios(args: string[], testSuite: string, isRef: boolean, globalRequiredLogin: boolean, ws: WorkspaceConfig): {
    scenarios: Scenario[];
    data: TestSuiteModel | undefined;
    viewports: ViewportNext[];
};
export declare function isCIEnvironment(env?: NodeJS.ProcessEnv): boolean;
export declare function getConfigs(args: string[], backstopDirName: string): Config[];
export {};