import { Password, Session, VerifyEmail } from 'studiocms:auth/lib';
import { SDKCore } from 'studiocms:sdk';
import {
	AllResponse,
	createEffectAPIRoutes,
	createJsonResponse,
	Effect,
	genLogger,
	Layer,
	OptionsResponse,
	pipeLogger,
} from '../../../effect.js';
import { AuthAPIUtils } from './shared.js';

const deps = Layer.mergeAll(AuthAPIUtils.Default, VerifyEmail.Default);

export const { POST, OPTIONS, ALL } = createEffectAPIRoutes(
	{
		POST: (ctx) =>
			genLogger('studiocms/routes/api/auth/login/POST')(function* () {
				const [
					sdk,
					{ badFormDataEntry, parseFormDataEntryToString, readFormData },
					{ verifyPasswordHash },
					{ createUserSession },
					{ isEmailVerified },
				] = yield* Effect.all([SDKCore, AuthAPIUtils, Password, Session, VerifyEmail]);

				const formData = yield* readFormData(ctx);

				const [username, password] = yield* pipeLogger(
					'studiocms/routes/api/auth/login/POST.parseFormData'
				)(
					Effect.all([
						parseFormDataEntryToString(formData, 'username'),
						parseFormDataEntryToString(formData, 'password'),
					])
				);

				if (!username) return yield* badFormDataEntry('Invalid credentials', 'Invalid credentials');
				if (!password) return yield* badFormDataEntry('Invalid credentials', 'Invalid credentials');

				const existingUser = yield* sdk.GET.users.byUsername(username);

				// If the user does not exist, return an ambiguous error
				if (!existingUser)
					return yield* badFormDataEntry('Invalid credentials', 'Invalid credentials');

				// Check if the user has a password or is using a oAuth login
				if (!existingUser.password)
					return yield* badFormDataEntry('Invalid credentials', 'Invalid credentials');

				const validPassword = yield* verifyPasswordHash(existingUser.password, password);

				if (!validPassword)
					return yield* badFormDataEntry('Invalid credentials', 'Invalid credentials');

				const isEmailAccountVerified = yield* isEmailVerified(existingUser);

				// If the email is not verified, return an error
				if (!isEmailAccountVerified)
					return yield* badFormDataEntry(
						'Email not verified',
						'Please verify your email before logging in'
					);

				yield* createUserSession(existingUser.id, ctx);

				return new Response();
			}).pipe(Effect.provide(deps)),
		OPTIONS: () => Effect.try(() => OptionsResponse({ allowedMethods: ['POST'] })),
		ALL: () => Effect.try(() => AllResponse()),
	},
	{
		cors: { methods: ['POST', 'OPTIONS'] },
		onError: (error) => {
			console.error('API Error:', error);
			return createJsonResponse(
				{ error: 'Internal Server Error' },
				{
					status: 500,
				}
			);
		},
	}
);