import { version as currentDirectusVersion } from '../../package.json';
import { InvalidPayloadException } from '../exceptions';
import { getDatabaseClient } from '../database';
import Joi from 'joi';
import { TYPES } from '@directus/shared/constants';
import { ALIAS_TYPES } from '../constants';
import { DatabaseClients, Snapshot } from '../types';

const snapshotJoiSchema = Joi.object({
	version: Joi.number().valid(1).required(),
	directus: Joi.string().required(),
	vendor: Joi.string()
		.valid(...DatabaseClients)
		.optional(),
	collections: Joi.array().items(
		Joi.object({
			collection: Joi.string(),
			meta: Joi.any(),
			schema: Joi.object({
				name: Joi.string(),
			}),
		})
	),
	fields: Joi.array().items(
		Joi.object({
			collection: Joi.string(),
			field: Joi.string(),
			meta: Joi.any(),
			schema: Joi.object({
				default_value: Joi.any(),
				max_length: [Joi.number(), Joi.string(), Joi.valid(null)],
				is_nullable: Joi.bool(),
			})
				.unknown()
				.allow(null),
			type: Joi.string()
				.valid(...TYPES, ...ALIAS_TYPES)
				.allow(null),
		})
	),
	relations: Joi.array().items(
		Joi.object({
			collection: Joi.string(),
			field: Joi.string(),
			meta: Joi.any(),
			related_collection: Joi.any(),
			schema: Joi.any(),
		})
	),
});

/**
 * Validates the snapshot against the current instance.
 **/
export function validateSnapshot(snapshot: Snapshot, force = false) {
	const { error } = snapshotJoiSchema.validate(snapshot);
	if (error) throw new InvalidPayloadException(error.message);

	// Bypass checks when "force" option is enabled
	if (force) return;

	if (snapshot.directus !== currentDirectusVersion) {
		throw new InvalidPayloadException(
			`Provided snapshot's directus version ${snapshot.directus} does not match the current instance's version ${currentDirectusVersion}. You can bypass this check by passing the "force" query parameter.`
		);
	}

	if (!snapshot.vendor) {
		throw new InvalidPayloadException(
			'Provided snapshot does not contain the "vendor" property. You can bypass this check by passing the "force" query parameter.'
		);
	}

	const currentVendor = getDatabaseClient();
	if (snapshot.vendor !== currentVendor) {
		throw new InvalidPayloadException(
			`Provided snapshot's vendor ${snapshot.vendor} does not match the current instance's vendor ${currentVendor}. You can bypass this check by passing the "force" query parameter.`
		);
	}
}