import type { HousekeepingPreferences } from "./schema";
import {
	defaultHousekeepingPreferences,
	parseHousekeepingPreferences,
} from "./schema";

export interface HousekeepingPreferencesStorageRow {
	schemaVersion: number;
	payload: string;
}

export interface HousekeepingPreferencesStorage {
	findByUserId(
		userId: number,
	): Promise<HousekeepingPreferencesStorageRow | null>;
	upsert(row: {
		userId: number;
		schemaVersion: 1;
		payload: string;
	}): Promise<void>;
}

export interface HousekeepingPreferencesRepository {
	read(userId: number): Promise<HousekeepingPreferences>;
	upsert(userId: number, value: HousekeepingPreferences): Promise<void>;
}

export function createHousekeepingPreferencesRepository(
	storage: HousekeepingPreferencesStorage,
): HousekeepingPreferencesRepository {
	return {
		async read(userId) {
			const row = await storage.findByUserId(userId);
			if (!row) return defaultHousekeepingPreferences();

			try {
				if (row.schemaVersion !== 1) {
					return defaultHousekeepingPreferences();
				}
				return parseHousekeepingPreferences(row.payload);
			} catch {
				return defaultHousekeepingPreferences();
			}
		},
		async upsert(userId, value) {
			await storage.upsert({
				userId,
				schemaVersion: value.schemaVersion,
				payload: JSON.stringify(value),
			});
		},
	};
}