const DRAFT_PREFIX = 'product-draft';

export type ProductDraftData = {
    productName: string;
    status: string;
    description: string;
    categoryIds: number[];
    useSamePrice: boolean;
    sharedPrices: Array<{ type: string; price: number }>;
    variants: Array<{
        id?: number | null;
        name: string;
        stock: number;
        reject_stock: number;
        retail_stock: number;
        photos?: Array<{ key: string }>;
        photo?: string;
        prices: Array<{ type: string; price: number }>;
    }>;
};

function getKey(
    type: 'create' | 'edit',
    userId?: number,
    productId?: number,
): string {
    if (type === 'edit' && productId) {
        return `${DRAFT_PREFIX}-edit-${userId ?? 'anon'}-${productId}`;
    }

    return `${DRAFT_PREFIX}-create-${userId ?? 'anon'}`;
}

export function saveProductDraft(
    type: 'create' | 'edit',
    data: ProductDraftData,
    userId?: number,
    productId?: number,
): boolean {
    if (type !== 'create') {
        return false;
    }

    try {
        const key = getKey(type, userId, productId);
        localStorage.setItem(key, JSON.stringify(data));

        return true;
    } catch {
        return false;
    }
}

export function loadProductDraft(
    type: 'create' | 'edit',
    userId?: number,
    productId?: number,
): ProductDraftData | null {
    try {
        const key = getKey(type, userId, productId);
        const raw = localStorage.getItem(key);

        if (!raw) {
return null;
}

        return JSON.parse(raw) as ProductDraftData;
    } catch {
        return null;
    }
}

export function clearProductDraft(
    type: 'create' | 'edit',
    userId?: number,
    productId?: number,
): void {
    try {
        const key = getKey(type, userId, productId);
        localStorage.removeItem(key);
    } catch {
        // ignore
    }
}