/**
 * 本地商品/品牌过滤（基于全量缓存）
 */

export function matchKeyword(item, keyword) {
	if (!keyword) return true
	const kw = String(keyword).trim()
	if (!kw) return true
	const kwLower = kw.toLowerCase()
	const name = item.name != null ? String(item.name).toLowerCase() : ''
	const pinyin = item.pinyin != null ? String(item.pinyin).toLowerCase() : ''
	const shortPinyin = item.shortPinyin != null ? String(item.shortPinyin).toLowerCase() : ''
	return name.includes(kwLower) ||
		pinyin.includes(kwLower) ||
		shortPinyin.includes(kwLower)
}

export function filterGoods(allGoods, options = {}) {
	const { categoryId, subCategoryId, brandId, keyword } = options
	const list = Array.isArray(allGoods) ? allGoods : []
	return list.filter(item => {
		if (categoryId != null && categoryId !== '' && String(item.categoryId) !== String(categoryId)) {
			return false
		}
		if (subCategoryId != null && subCategoryId !== '' && String(item.subCategoryId) !== String(subCategoryId)) {
			return false
		}
		if (brandId != null && brandId !== '' && String(item.brandId) !== String(brandId)) {
			return false
		}
		return matchKeyword(item, keyword)
	})
}

export function filterBrandsByCategory(allBrands, allGoods, categoryId) {
	if (!categoryId) {
		return Array.isArray(allBrands) ? allBrands : []
	}
	const goods = Array.isArray(allGoods) ? allGoods : []
	const brands = Array.isArray(allBrands) ? allBrands : []
	const brandIds = new Set(
		goods
			.filter(g => String(g.categoryId) === String(categoryId) && g.brandId != null && g.brandId !== '')
			.map(g => String(g.brandId))
	)
	return brands.filter(b => brandIds.has(String(b.id)))
}