import fs from 'node:fs';
import path from 'node:path';
import { parse } from 'yaml';

import { resolvePublicApiRoutes } from '@/public-api/public-api-route-resolver';

import { buildRequestBodyJsonSchema, getDecoratorGeneratedOperations } from '../decorator-routes';

/**
 * The build writes a request body schema into the spec. `/discover` builds the same schema at
 * runtime, through `buildRequestBodyJsonSchema`. Nothing else checks that the two agree.
 */
const V1_DIR = path.resolve(__dirname, '../..');

// The build writes one spec file per route and names it after the handler method, so the handler
// name is what links a route to its file.
const SPEC_FILE_BY_HANDLER = new Map(
	getDecoratorGeneratedOperations().map((operation) => [
		operation.config.operationId,
		operation.outputPath,
	]),
);

function schemaInSpecFile(handlerName: string): unknown {
	const specFile = SPEC_FILE_BY_HANDLER.get(handlerName);
	if (!specFile) throw new Error(`The build generated no spec file for ${handlerName}`);

	const spec = parse(fs.readFileSync(path.join(V1_DIR, specFile), 'utf8')) as {
		requestBody?: { content?: Record<string, { schema?: unknown }> };
	};

	return spec.requestBody?.content?.['application/json']?.schema;
}

describe('buildRequestBodyJsonSchema', () => {
	const routesWithBody = resolvePublicApiRoutes().filter((route) => route.requestBodyDto);

	it.each(routesWithBody)('$handlerName matches its committed spec file', (route) => {
		expect(buildRequestBodyJsonSchema(route)).toEqual(schemaInSpecFile(route.handlerName));
	});
});