// @vitest-environment jsdom

import { existsSync, readdirSync, readFileSync, statSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { describe, expect, it } from 'vitest';

import { createActiveApp, type ActiveApp } from '$active-app';
import { createActiveDom } from '$adom';
import { createActivePrefs, createActivePrefsDomProjection, standardPrefsDimensions } from '$prefs';
import type { LangNode } from '$libs/langs';
import { state } from '$libs/reactive';
import {
	ActiveUixMissingServiceError,
	attachActiveUix,
	createActiveUix
} from './active-uix/active-uix.svelte';
import { defineUixServices, UIX_REQUIRED_SERVICES } from './active-uix/services';
import { createActiveEidos, ActiveEidosConfigError } from './eidos/active-eidos.svelte';
import {
	_resetMorfoRegistryForTesting,
	connectMorfoTranslations,
	registerMorfo,
	type Morfo,
	v
} from './morfo';
import { toggleMorfo } from './morfo/components/toggle';
import { EngineSemantic, defineEngineSemantic } from './sema';
import { SemaConfigError } from './sema/errors';
import { createSomaRuntime } from './soma/runtime.svelte';
import { UIX_LAYER_CONTRACTS } from './contracts';
import { commonLangs } from './langs';

const minimalLang = { schema: {} satisfies LangNode, defaultLocale: 'es' as const };
const prefsProjectionSchema = standardPrefsDimensions({
	languages: ['es-ES', 'ar-EG'],
	locales: ['es-ES', 'ar-EG'],
	currencies: ['EUR'],
	defaults: {
		language: 'es-ES',
		locale: 'es-ES',
		currency: 'EUR'
	}
});
const HERE = dirname(fileURLToPath(import.meta.url));
const REPO_ROOT = join(HERE, '..', '..');
const SOURCE_EXTENSIONS = ['.ts', '.svelte'] as const;

function preferencesHarness() {
	return {
		getTheme: () => 'base',
		getMode: () => 'light' as const,
		getDensity: () => 'comfortable' as const,
		onPreferenceChange: () => () => {}
	};
}

function listSourceFiles(root: string): string[] {
	const stat = statSync(root);
	if (stat.isFile()) {
		return SOURCE_EXTENSIONS.some((ext) => root.endsWith(ext)) ? [root] : [];
	}

	return readdirSync(root)
		.flatMap((entry) => listSourceFiles(join(root, entry)))
		.filter(
			(path) => !path.endsWith('.test.ts') && !path.includes(`${join('components', 'icon', 'lib')}`)
		);
}

function grepSources(root: string, pattern: RegExp): string[] {
	return listSourceFiles(root).filter((file) => pattern.test(readFileSync(file, 'utf8')));
}

function stripComments(source: string): string {
	return source.replace(/\/\*[\s\S]*?\*\//g, '').replace(/(^|[^:])\/\/.*$/gm, '$1');
}

function collectKnownMorfoDataAttrs(): Set<string> {
	const attrs = new Set<string>();
	for (const file of listSourceFiles(join(HERE, 'morfo', 'components'))) {
		const source = stripComments(readFileSync(file, 'utf8'));
		const component = /kebab:\s*'([^']+)'/.exec(source)?.[1];
		if (!component) continue;

		const partRe = /kebab:\s*'([^']+)'/g;
		let partMatch: RegExpExecArray | null;
		while ((partMatch = partRe.exec(source))) {
			const part = partMatch[1];
			attrs.add(part === 'provider' ? `data-${component}` : `data-${component}-${part}`);
		}

		const dataRe = /attr:\s*'([^']+)'/g;
		let dataMatch: RegExpExecArray | null;
		while ((dataMatch = dataRe.exec(source))) {
			if (dataMatch[1].startsWith('data-')) attrs.add(dataMatch[1]);
		}
	}
	return attrs;
}

function collectDataAttrs(source: string): Set<string> {
	const clean = stripComments(source);
	const attrs = new Set<string>();
	const stringRe = /['"`](data-[a-zA-Z0-9_-]+)['"`]/g;
	const inlineRe = /\b(data-[a-zA-Z0-9_-]+)(?=(?:=|\s|>|\/|}|\]))/g;
	let match: RegExpExecArray | null;

	while ((match = stringRe.exec(clean))) attrs.add(match[1]);
	while ((match = inlineRe.exec(clean))) attrs.add(match[1]);

	return attrs;
}

function toPascalName(kebab: string): string {
	return kebab
		.split('-')
		.map((segment) => `${segment.charAt(0).toUpperCase()}${segment.slice(1)}`)
		.join('');
}

function collectPublicSomaComponentDirs(): string[] {
	const root = join(HERE, 'soma', 'components');
	return readdirSync(root, { withFileTypes: true })
		.filter((entry) => entry.isDirectory())
		.map((entry) => entry.name)
		.filter((name) => name !== 'internal' && existsSync(join(root, name, 'index.ts')))
		.sort();
}

function collectMorfoComponentNamesByScope(scope: string): string[] {
	const root = join(HERE, 'morfo', 'components');
	return readdirSync(root)
		.filter((file) => file.endsWith('.ts') && !file.endsWith('.test.ts'))
		.filter((file) => {
			const source = stripComments(readFileSync(join(root, file), 'utf8'));
			return new RegExp(`scope:\\s*\\[[^\\]]*'${scope}'`).test(source);
		})
		.map((file) => file.replace(/\.ts$/, ''))
		.sort();
}

function collectComponentLangPathViolations(source: string, file: string): string[] {
	const clean = stripComments(source);
	const violations: string[] = [];
	const refRe = /#\?components\.([^|'"`\s]+)/g;
	let match: RegExpExecArray | null;

	while ((match = refRe.exec(clean))) {
		const path = match[1];
		const segments = path.split('.');
		if (segments.some((segment) => /[A-Z]/.test(segment))) {
			violations.push(`${file.replace(REPO_ROOT, '')}: components.${path}`);
		}
	}

	return violations;
}

function collectLangCatalogKeyViolations(node: unknown, prefix = 'components'): string[] {
	if (!node || typeof node !== 'object') return [];

	return Object.entries(node as Record<string, unknown>).flatMap(([key, value]) => {
		const path = `${prefix}.${key}`;
		const ownViolation = /[A-Z]/.test(key) ? [path] : [];
		return [...ownViolation, ...collectLangCatalogKeyViolations(value, path)];
	});
}

function collectBrokenSomaComponentReadmeLinks(): string[] {
	const root = join(HERE, 'soma', 'components');
	return collectPublicSomaComponentDirs().flatMap((dir) => {
		const file = join(root, dir, 'README.md');
		const source = readFileSync(file, 'utf8');
		const violations: string[] = [];
		const linkRe = /\]\((\.\.\/[^)]+README\.md)\)/g;
		let match: RegExpExecArray | null;

		while ((match = linkRe.exec(source))) {
			const target = join(root, dir, match[1]);
			if (!existsSync(target)) {
				violations.push(`${dir}/README.md -> ${match[1]}`);
			}
		}

		return violations;
	});
}

describe('UIX layer contracts', () => {
	it('pins ActiveUix public service names and rejects legacy aliases', () => {
		const uix = createActiveUix({ langs: minimalLang });
		try {
			for (const key of UIX_LAYER_CONTRACTS.activeUix.publicSurface) {
				expect(key in uix, key).toBe(true);
			}
			for (const key of UIX_LAYER_CONTRACTS.activeUix.forbiddenPublicSurface) {
				expect(key in uix, key).toBe(false);
			}

			expect(uix.ownsApp).toBe(true);
			expect(uix.app).toBeUndefined();
			expect(uix.events).toBeInstanceOf(EngineSemantic);
		} finally {
			uix.dispose();
		}
	});

	it('keeps attach mode as consumption-only: required services are langs + dom', () => {
		expect(UIX_REQUIRED_SERVICES).toEqual(UIX_LAYER_CONTRACTS.activeUix.attachRequires);

		const app = createActiveApp({ services: {} });
		try {
			attachActiveUix(app as unknown as ActiveApp);
			expect.fail('attachActiveUix should reject an app without UIX services');
		} catch (err) {
			if (!(err instanceof ActiveUixMissingServiceError)) throw err;
			expect(err.missing).toEqual(['langs', 'dom']);
			expect(err.missing).not.toContain('events');
		} finally {
			app.dispose();
		}
	});

	it('defineUixServices publishes events, never semantic, and cannot attach without dom', () => {
		const services = defineUixServices({ langs: minimalLang });
		expect(Object.keys(services).sort()).toEqual(['clipboard', 'dom', 'events', 'format', 'langs']);
		expect('semantic' in services).toBe(false);
		expect('lang' in services).toBe(false);
		expect('frontend' in services).toBe(false);

		const noDomServices = defineUixServices({ langs: minimalLang, dom: false });
		expect('dom' in noDomServices).toBe(false);
		expect('events' in noDomServices).toBe(false);

		const app = createActiveApp({ services: noDomServices });
		try {
			expect(() => attachActiveUix(app as unknown as ActiveApp)).toThrow(
				ActiveUixMissingServiceError
			);
		} finally {
			app.dispose();
		}
	});

	it('guards ActiveUix as composition root, not Soma/Eidos bootstrapper', () => {
		const source = readFileSync(join(HERE, 'active-uix', 'active-uix.svelte.ts'), 'utf8');

		expect(source).not.toMatch(/from ['"].*\/soma/);
		expect(source).not.toMatch(/from ['"].*\/eidos/);
		expect(source).not.toMatch(/\bSoma\.create\(/);
		expect(source).not.toMatch(/\bActiveEidos\.create\(/);
		expect(source).not.toMatch(/\bEidos\.create\(/);
	});

	it('prefs DOM projection owns only cross-modal attrs', () => {
		expect(UIX_LAYER_CONTRACTS.prefsDomProjection.implementation).toBe(
			'$prefs.createActivePrefsDomProjection'
		);
		expect(UIX_LAYER_CONTRACTS.prefsDomProjection.requires).toEqual(['prefs', 'dom']);
		expect(UIX_LAYER_CONTRACTS.prefsDomProjection.ownsAttrs).toEqual([
			'dir',
			'data-motion',
			'data-sound',
			'data-haptic'
		]);
		expect(UIX_LAYER_CONTRACTS.prefsDomProjection.forbiddenAttrs).toEqual([
			'data-theme',
			'data-mode',
			'data-density'
		]);
	});

	it('implements cross-modal projection in prefs, not ActiveUix', () => {
		const dom = createActiveDom();
		const prefs = createActivePrefs({ schema: prefsProjectionSchema });
		const target = document.createElement('div');
		const projection = createActivePrefsDomProjection({ prefs, dom, target });

		try {
			for (const attr of UIX_LAYER_CONTRACTS.prefsDomProjection.ownsAttrs) {
				expect(target.hasAttribute(attr), attr).toBe(true);
			}
			for (const attr of UIX_LAYER_CONTRACTS.prefsDomProjection.forbiddenAttrs) {
				expect(target.hasAttribute(attr), attr).toBe(false);
			}
		} finally {
			projection.dispose();
			prefs.dispose();
			dom.dispose();
		}
	});

	it('SomaRuntime has one public part API and only depends on injected services', async () => {
		const dom = createActiveDom();
		try {
			const runtime = createSomaRuntime(toggleMorfo, { dom });
			for (const key of UIX_LAYER_CONTRACTS.somaRuntime.publicSurface) {
				expect(key in runtime, key).toBe(true);
			}
			for (const key of UIX_LAYER_CONTRACTS.somaRuntime.forbiddenPublicSurface) {
				expect(key in runtime, key).toBe(false);
			}

			const id = state('toggle-contract');
			runtime.part('provider', { id });
			expect(runtime.partProps('provider')).toMatchObject({
				id: 'toggle-contract',
				'data-toggle': ''
			});
		} finally {
			dom.dispose();
		}
	});

	it('guards Soma components from legacy runtime registration APIs', () => {
		const violations = grepSources(
			join(HERE, 'soma', 'components'),
			/registerContract\(|registerPart\(/
		);
		expect(violations).toEqual([]);
	});

	it('guards Soma component barrel exports all public component modules', () => {
		const indexSource = readFileSync(join(HERE, 'soma', 'components', 'index.ts'), 'utf8');
		const missingExports = collectPublicSomaComponentDirs()
			.map((dir) => ({
				dir,
				name: toPascalName(dir),
				exportRe: new RegExp(`export \\* as ${toPascalName(dir)} from ['"]\\./${dir}['"];`)
			}))
			.filter(({ exportRe }) => !exportRe.test(indexSource))
			.map(({ dir, name }) => `${dir} -> ${name}`);

		expect(missingExports).toEqual([]);
	});

	it('guards Soma Provider exports use the canonical root wrapper filename', () => {
		const violations = collectPublicSomaComponentDirs()
			.filter((dir) => {
				const source = readFileSync(join(HERE, 'soma', 'components', dir, 'exports.ts'), 'utf8');
				const expected = `export { default as Provider } from './components/${dir}.svelte';`;
				return !source.includes(expected);
			})
			.map((dir) => `${dir}/exports.ts`);

		expect(violations).toEqual([]);
	});

	it('guards Soma public barrels from provider implementation filenames', () => {
		const violations = collectPublicSomaComponentDirs()
			.map((dir) => join(HERE, 'soma', 'components', dir, 'exports.ts'))
			.filter((file) =>
				/from ['"][^'"]*provider\.svelte(?:\.ts)?['"]/.test(readFileSync(file, 'utf8'))
			)
			.map((file) => file.replace(REPO_ROOT, ''));

		expect(violations).toEqual([]);
	});

	it('guards Soma public barrels from shared lib facades', () => {
		const violations = collectPublicSomaComponentDirs()
			.map((dir) => join(HERE, 'soma', 'components', dir, 'exports.ts'))
			.filter((file) => /from ['"]\$libs\//.test(readFileSync(file, 'utf8')))
			.map((file) => file.replace(REPO_ROOT, ''));

		expect(violations).toEqual([]);
	});

	it('guards Soma public component modules against Morfo soma scope', () => {
		expect(collectPublicSomaComponentDirs()).toEqual(collectMorfoComponentNamesByScope('soma'));
	});

	it('guards Soma public component modules with local README docs', () => {
		const missingReadmes = collectPublicSomaComponentDirs().filter(
			(dir) => !existsSync(join(HERE, 'soma', 'components', dir, 'README.md'))
		);

		expect(missingReadmes).toEqual([]);
	});

	it('guards Soma component README links to existing component docs', () => {
		expect(collectBrokenSomaComponentReadmeLinks()).toEqual([]);
	});

	it('guards Soma from external re-export facades', () => {
		expect(existsSync(join(HERE, 'soma', 'external'))).toBe(false);
		const violations = grepSources(join(HERE, 'soma'), /external\/(?:dates|colors)/);

		expect(violations).toEqual([]);
	});

	it('guards Soma internals from importing their own public alias', () => {
		const violations = listSourceFiles(join(HERE, 'soma'))
			.filter((file) => {
				const source = stripComments(readFileSync(file, 'utf8'));
				return /from ['"]\$soma(?:['"]|\/)/.test(source);
			})
			.map((file) => file.replace(REPO_ROOT, ''));

		expect(violations).toEqual([]);
	});

	it('guards Soma from direct mutable DOM writes', () => {
		const violations = grepSources(
			join(HERE, 'soma'),
			/\.setAttribute\(|\.removeAttribute\(|\.toggleAttribute\(|\.classList\.|\.style\.setProperty\(|\.style\.[a-zA-Z]+\s*=/
		);

		expect(violations).toEqual([]);
	});

	it('guards Soma component timers through the injected scheduler', () => {
		const allowedFallback = join(HERE, 'soma', 'components', 'announce', 'global.svelte.ts');
		const violations = listSourceFiles(join(HERE, 'soma', 'components')).filter((file) => {
			if (file === allowedFallback) return false;
			return /\bsetTimeout\(|\bclearTimeout\(|\bsetInterval\(|\bclearInterval\(/.test(
				stripComments(readFileSync(file, 'utf8'))
			);
		});

		expect(violations).toEqual([]);
	});

	it('guards Soma components through the shared typeahead helper', () => {
		const violations = grepSources(
			join(HERE, 'soma', 'components'),
			/class\s+Typeahead|typeaheadBuffer|typeaheadTimerKey|clearTypeaheadTimer/
		);

		expect(violations).toEqual([]);
	});

	it('guards Soma component listeners through ActiveDom', () => {
		const violations = grepSources(
			join(HERE, 'soma', 'components'),
			/\.(addEventListener|removeEventListener)\(/
		);

		expect(violations).toEqual([]);
	});

	it('guards hardcoded Soma component data attrs with morfo contracts', () => {
		const knownAttrs = collectKnownMorfoDataAttrs();
		const violations = listSourceFiles(join(HERE, 'soma', 'components')).flatMap((file) => {
			const attrs = collectDataAttrs(readFileSync(file, 'utf8'));
			return [...attrs]
				.filter((attr) => !knownAttrs.has(attr))
				.map((attr) => `${file.replace(REPO_ROOT, '')}: ${attr}`);
		});

		expect(violations).toEqual([]);
	});

	it('guards component translation namespaces as kebab-case', () => {
		const sourceRoots = [join(HERE, 'soma', 'components'), join(HERE, 'morfo', 'components')];
		const pathViolations = sourceRoots.flatMap((root) =>
			listSourceFiles(root).flatMap((file) =>
				collectComponentLangPathViolations(readFileSync(file, 'utf8'), file)
			)
		);

		expect(pathViolations).toEqual([]);
		expect(collectLangCatalogKeyViolations(commonLangs, 'common')).toEqual([]);
	});

	it('events/sema uses events as service name and requires dom or projector for visual projection', () => {
		const factory = defineEngineSemantic({ visual: false });
		expect(factory.name).toBe(UIX_LAYER_CONTRACTS.events.publicServiceName);
		expect(factory.serviceDependencies).toEqual(['dom']);
		expect(UIX_LAYER_CONTRACTS.events.morfoPayloadName).toBe('semantic');
		expect(UIX_LAYER_CONTRACTS.events.requiresOneOfForVisualProjection).toEqual([
			'dom',
			'projector'
		]);

		expect(() => new EngineSemantic()).toThrow(SemaConfigError);
		expect(() => new EngineSemantic({ visual: false })).not.toThrow();
	});

	it('ActiveEidos is the visual runtime and does not recreate an engine layer', () => {
		expect(UIX_LAYER_CONTRACTS.activeEidos.publicRuntime).toBe('ActiveEidos');
		expect(existsSync(new URL('./eidos/engine', import.meta.url))).toBe(false);
		expect(existsSync(new URL('./eidos/core/headless', import.meta.url))).toBe(false);
		expect(UIX_LAYER_CONTRACTS.activeEidos.constructionOptionalServices).toEqual([
			'langs',
			'format',
			'prefs'
		]);
		expect(UIX_LAYER_CONTRACTS.activeEidos.requiredAccessors).toEqual(['langs', 'prefs']);
		expect(UIX_LAYER_CONTRACTS.activeEidos.optionalAccessors).toEqual(['format']);

		expect(() => createActiveEidos({ preferences: preferencesHarness() })).toThrow(
			ActiveEidosConfigError
		);
		const eidos = createActiveEidos({
			preferences: preferencesHarness(),
			applyDom: false
		});
		expect(eidos.renderStaticCss()).toContain('--size-md-control-height');
		expect(() => eidos.prefs).toThrow(ActiveEidosConfigError);
		expect(eidos.format).toBeUndefined();
		eidos.dispose();
	});

	it('guards Eidos public surface from wrapper/engine reintroduction', () => {
		const eidosRoot = join(HERE, 'eidos');
		const violations = grepSources(
			eidosRoot,
			/\bEngineEidos\b|\bclass\s+Eidos\b|\bEidos\.create\(|from ['"].*\/engine/
		);

		expect(violations).toEqual([]);
	});

	it('guards UIX docs shell from writing visual prefs through ActivePrefs', () => {
		const violations = grepSources(
			join(REPO_ROOT, 'web', 'routes', 'uix'),
			/prefs\.theme|setIntent\(['"]theme['"]/
		);
		expect(violations).toEqual([]);
	});

	it('Morfo owns translations declaratively and only registers them into a target', () => {
		_resetMorfoRegistryForTesting();
		const applied: Array<{ namespace: string; module: LangNode }> = [];
		const detach = connectMorfoTranslations({
			extend(namespace, module) {
				applied.push({ namespace, module });
			}
		});

		try {
			registerMorfo({
				name: 'ContractSample',
				kebab: 'contract-sample',
				scope: ['soma'],
				translations: {
					label: { es: 'Contrato', en: 'Contract' }
				},
				parts: [
					{
						name: 'Provider',
						kebab: 'provider',
						kind: 'public',
						defaultElement: 'div',
						optional: false,
						data: [],
						aria: [
							{
								attr: 'aria-label',
								value: v.translationRef('label', 'Contract')
							}
						]
					}
				]
			} satisfies Morfo);

			expect(applied).toHaveLength(1);
			expect(applied[0]?.namespace).toBe('components.contract-sample');
			expect(applied[0]?.module).toEqual({
				label: { es: 'Contrato', en: 'Contract' }
			});
		} finally {
			detach();
			_resetMorfoRegistryForTesting();
		}
	});
});