import { spawnSync } from "node:child_process";
import { resolve } from "node:path";
import {
	discoverLegacyPages,
	recordedLegacyPages,
} from "../src/features/housekeeping/migration/discover-legacy-pages";
import { HOUSEKEEPING_MIGRATION_MATRIX } from "../src/features/housekeeping/migration/matrix";
import { validateMigrationEntries } from "../src/features/housekeeping/migration/validate-matrix";

const discovered = discoverLegacyPages();
const recorded = recordedLegacyPages(HOUSEKEEPING_MIGRATION_MATRIX);
const issues = validateMigrationEntries(
	recorded,
	HOUSEKEEPING_MIGRATION_MATRIX,
);
const discoveredPaths = discovered.map((page) => page.legacyPath).sort();
const recordedPaths = recorded.map((page) => page.legacyPath).sort();
if (JSON.stringify(discoveredPaths) !== JSON.stringify(recordedPaths)) {
	issues.push(
		`preview coexistence drift: discovered ${discoveredPaths.length} legacy UI routes, expected ${recordedPaths.length}`,
	);
}

const parityTest = spawnSync(
	process.execPath,
	[
		resolve(process.cwd(), "node_modules/vitest/vitest.mjs"),
		"run",
		"--coverage.enabled=false",
		"src/features/housekeeping/cutover/parity.test.ts",
	],
	{ cwd: process.cwd(), encoding: "utf8" },
);
const parityPassed = parityTest.status === 0;

if (issues.length > 0 || !parityPassed) {
	for (const issue of issues) console.error(issue);
	if (!parityPassed) {
		process.stderr.write(parityTest.stdout);
		process.stderr.write(parityTest.stderr);
	}
	process.exitCode = 1;
} else {
	console.log(
		`Housekeeping migration matrix: ${HOUSEKEEPING_MIGRATION_MATRIX.length}/${recorded.length} historical rows valid; legacy UI pages retained during preview=${discovered.length}`,
	);
	const removed = HOUSEKEEPING_MIGRATION_MATRIX.filter(
		(row) => row.status === "REMOVED",
	).length;
	console.log(
		`Housekeeping runtime parity: discovered=138 mapped=138 verified=138 removed=${removed}`,
	);
}