import * as z from 'zod'
import { createValidationSchema } from '@/app/lib/validation-config-parser';
import validationConfig from '@/app/lib/validation-config.json';

export type FormState =
	| {
		errors?: {
			name?: string[]
			email?: string[]
			password?: string[]
		}
		message?: string
	}
	| undefined

export type FormAction = (
	state: FormState,
	formData: FormData
) => Promise<FormState>

interface FieldConfig {
	maxSize?: { value: number; message: string };
	minSize?: { value: number; message: string };
	allowedSymbols?: { value: string; message: string };
	optional?: { value: boolean };
	requiredDigit?: { value: boolean; message: string };
	requiredLetter?: { value: boolean; message: string };
	caseType?: { value: 'LOWER' | 'UPPER' | 'ANY'; message: string };
	emailValidation?: { value: boolean; message: string };
}

interface ValidationConfig {
	[key: string]: FieldConfig;
}

const defaultConfig = validationConfig as ValidationConfig;

let cachedSignupSchema: any = null;
let schemaPromise: Promise<any> | null = null;

async function loadConfigFromBackend(): Promise<any> {
	try {
		const response = await fetch('/api/validation-config');
		if (!response.ok) throw new Error('Failed to load config');
		return await response.json();
	} catch (error) {
		console.error('Using default validation config:', error);
		return defaultConfig;
	}
}

export async function getSignupFormSchema() {
	console.log('get scheme');
	if (cachedSignupSchema) {
		return cachedSignupSchema;
	}

	if (!schemaPromise) {
		schemaPromise = (async () => {
			const config = await loadConfigFromBackend();
			cachedSignupSchema = createValidationSchema(config);
			return cachedSignupSchema;
		})();
	}

	return await schemaPromise;
}

export const SignupFormSchema = createValidationSchema(defaultConfig);


export const loginFormSchema = z
	.object({
		email: z
			.string()
			.min(1, { error: 'login-error-email' })
			.trim(),
		password: z
			.string()
			.min(1, { error: 'login-error-password' })
			.trim(),
	})

export const localDevelopmentUrl = process.env.DEV_URL ? process.env.DEV_URL : 'http://localhost';

export const API_BASE_URL = process.env.NODE_ENV === 'development'
	? localDevelopmentUrl
	: 'http://app:8080';

export const testUserData = {
	fullName: 'test',
	email: 'test@mail.com',
	subscriptionType: 'base'
}