// Type definitions for axe-core 3.0.2
// Project: https://github.com/dequelabs/axe-core
// Definitions by: Marcy Sutton <https://github.com/marcysutton>

declare namespace axe {
	type ImpactValue = 'minor' | 'moderate' | 'serious' | 'critical';

	type TagValue = 'wcag2a' | 'wcag2aa' | 'section508' | 'best-practice';

	type ReporterVersion = 'v1' | 'v2';

	type RunOnlyType = 'rule' | 'rules' | 'tag' | 'tags';

	type resultGroups = 'inapplicable' | 'passes' | 'incomplete' | 'violations';

	type RunOnlyObject = {
		include?: string[] | string[][];
		exclude?: string[] | string[][];
	};

	type RunCallback = (error: Error, results: AxeResults) => void;

	type ElementContext = Node | string | RunOnlyObject;

	interface RunOnly {
		type: RunOnlyType;
		values?: TagValue[] | string[] | RunOnlyObject;
	}
	interface RunOptions {
		runOnly?: RunOnly;
		rules?: Object;
		iframes?: boolean;
		elementRef?: boolean;
		selectors?: boolean;
		resultTypes?: resultGroups[];
	}
	interface AxeResults {
		url: string;
		timestamp: string;
		passes: Result[];
		violations: Result[];
		incomplete: Result[];
		inapplicable: Result[];
	}
	interface Result {
		description: string;
		help: string;
		helpUrl: string;
		id: string;
		impact: ImpactValue;
		tags: TagValue[];
		nodes: NodeResult[];
	}
	interface NodeResult {
		html: string;
		impact: ImpactValue;
		target: string[];
		any: CheckResult[];
		all: CheckResult[];
		none: CheckResult[];
		failureSummary?: string;
	}
	interface CheckResult {
		id: string;
		impact: string;
		message: string;
		data: any;
		relatedNodes?: RelatedNode[];
	}
	interface RelatedNode {
		target: string[];
		html: string;
	}
	interface RuleLocale {
		[key: string]: {
			description: string;
			help: string;
		};
	}
	interface CheckLocale {
		[key: string]: {
			pass: string;
			fail: string;
			incomplete: string | { [key: string]: string };
		};
	}
	interface Locale {
		lang?: string;
		rules?: RuleLocale;
		checks?: CheckLocale;
	}
	interface Spec {
		branding?: {
			brand: string;
			application: string;
		};
		reporter?: ReporterVersion;
		checks?: Check[];
		rules?: Rule[];
		locale?: Locale;
	}
	interface Check {
		id: string;
		evaluate: Function | string;
		after?: Function | string;
		options?: any;
		matches?: string;
		enabled?: boolean;
	}
	interface Rule {
		id: string;
		selector?: string;
		excludeHidden?: boolean;
		enabled?: boolean;
		pageLevel?: boolean;
		any?: string[];
		all?: string[];
		none?: string[];
		tags?: string[];
		matches?: string;
	}
	interface AxePlugin {
		id: string;
		run(...args: any[]): any;
		commands: {
			id: string;
			callback(...args: any[]): void;
		}[];
		cleanup?(callback: Function): void;
	}

	let plugins: any;

	/**
	 * Source string to use as an injected script in Selenium
	 */
	let source: string;

	/**
	 * Object for aXe Results
	 */
	var AxeResults: AxeResults;

	/**
	 * Runs a number of rules against the provided HTML page and returns the resulting issue list
	 *
	 * @param   {ElementContext} context  Optional The `Context` specification object @see Context
	 * @param   {RunOptions}     options  Optional Options passed into rules or checks, temporarily modifying them.
	 * @param   {RunCallback}    callback Optional The function to invoke when analysis is complete.
	 * @returns {Promise<AxeResults>|void} If the callback was not defined, aXe will return a Promise.
	 */
	function run(context?: ElementContext): Promise<AxeResults>;
	function run(options: RunOptions): Promise<AxeResults>;
	function run(callback: (error: Error, results: AxeResults) => void): void;
	function run(context: ElementContext, callback: RunCallback): void;
	function run(options: RunOptions, callback: RunCallback): void;
	function run(
		context: ElementContext,
		options: RunOptions
	): Promise<AxeResults>;
	function run(
		context: ElementContext,
		options: RunOptions,
		callback: RunCallback
	): void;

	/**
	 * Method for configuring the data format used by aXe. Helpful for adding new
	 * rules, which must be registered with the library to execute.
	 * @param  {Spec}       Spec Object with valid `branding`, `reporter`, `checks` and `rules` data
	 */
	function configure(spec: Spec): void;

	/**
	 * Searches and returns rules that contain a tag in the list of tags.
	 * @param  {Array}  tags  Optional array of tags
	 * @return {Array}  Array of rules
	 */
	function getRules(tags?: string[]): Object[];

	/**
	 * Restores the default axe configuration
	 */
	function reset(): void;

	/**
	 * Function to register a plugin configuration in document and its subframes
	 * @param  {Object}    plugin    A plugin configuration object
	 */
	function registerPlugin(plugin: AxePlugin): void;

	/**
	 * Function to clean up plugin configuration in document and its subframes
	 */
	function cleanup(): void;
}

export = axe;