/* eslint-disable no-param-reassign */

import { ThemeRegistry } from '@aesthetic/system';
import { darkTheme, design, lightTheme } from '@aesthetic/system/test';
import { ClassName, Engine, RenderOptions, RenderResult, Rule, ThemeName } from '@aesthetic/types';
import { hyphenate, objectLoop } from '@aesthetic/utils';
import { Aesthetic, AestheticOptions, EventListener, EventType, ThemeSheet } from '.';

export { darkTheme, design, lightTheme };

export function resetAestheticState(aesthetic: Aesthetic<any, any>) {
	// @ts-expect-error Allow access
	aesthetic.activeDirection = undefined;
	// @ts-expect-error Allow access
	aesthetic.activeTheme = undefined;
	// @ts-expect-error Allow access
	aesthetic.listeners.clear();
	// @ts-expect-error Allow access
	aesthetic.globalSheetRegistry.clear();
	// @ts-expect-error Allow access
	aesthetic.themeRegistry.reset();

	aesthetic.configure({
		customProperties: {},
		defaultUnit: 'px',
		deterministicClasses: false,
		directionConverter: null,
		rootVariables: false,
		vendorPrefixer: null,
	});
}

export function getAestheticState(aesthetic: Aesthetic<any, any>): {
	activeDirection: string | undefined;
	activeTheme: string | undefined;
	globalSheetRegistry: Map<ThemeName, ThemeSheet<any, any, any>>;
	listeners: Map<EventType, Set<EventListener>>;
	options: AestheticOptions;
	themeRegistry: ThemeRegistry<any>;
} {
	return {
		// @ts-expect-error Allow access
		activeDirection: aesthetic.activeDirection,
		// @ts-expect-error Allow access
		activeTheme: aesthetic.activeTheme,
		// @ts-expect-error Allow access
		globalSheetRegistry: aesthetic.globalSheetRegistry,
		// @ts-expect-error Allow access
		listeners: aesthetic.listeners,
		// @ts-expect-error Allow access
		options: aesthetic.options,
		// @ts-expect-error Allow access
		themeRegistry: aesthetic.themeRegistry,
	};
}

export function setupAesthetic(aesthetic: Aesthetic<any, any>) {
	aesthetic.registerTheme('day', lightTheme);
	aesthetic.registerTheme('night', darkTheme);
}

export function teardownAesthetic(aesthetic: Aesthetic<any, any>) {
	lightTheme.name = '';
	darkTheme.name = '';
	resetAestheticState(aesthetic);
}

export function createTestEngine(): Engine<Rule, ClassName> {
	const noop = () => {};

	const renderVariable = (name: string) => `variable:${hyphenate(name)}`;

	const renderRule = (rule: Rule, options: RenderOptions = {}): RenderResult<ClassName> => {
		let result = String(options.debugName ?? 'class');

		objectLoop(rule['@variables'], (value, name) => {
			result += ` ${renderVariable(name)}`;
		});

		return {
			result,
			variants: Object.keys(rule['@variants'] ?? {}).map((variant) => {
				const types = variant.split('+').map((v) => v.trim());

				return {
					result: types.map((v) => `variant:${v}`).join(' '),
					types,
				};
			}),
		};
	};

	const engine: Engine<Rule, ClassName> = {
		direction: 'ltr',
		name: 'test',
		prefersColorScheme: () => false,
		prefersContrastLevel: () => false,
		renderDeclaration: (prop) => `property:${hyphenate(prop)}`,
		renderFontFace: () => 'font-face',
		renderImport: () => 'import',
		renderKeyframes: (keyframes, name) => `keyframes:${hyphenate(name ?? 'unknown')}`,
		renderRule,
		renderRuleGrouped: renderRule,
		renderVariable,
		ruleCount: 0,
		setDirection: noop,
		setRootVariables: noop,
		setTheme: noop,
	};

	return engine;
}