/** 铸爱 — 与网关 CreateMintOrderRequestDTO 对齐的本地表单快照（见 gateway/dto/asset_dto.go） */

export const CRAFT_LENTICULAR_CN = '光栅卡'
/** 工艺名：与 craft-select 卡片「镭射卡」一致 */
export const CRAFT_LASER_CARD_CN = '镭射卡'
/** 工艺标签：写入 tags[]，便于检索与后端扩展 */
export const CRAFT_TAG_LENTICULAR = 'craft:lenticular'

const defaultBgBase =
	'radial-gradient(ellipse at 50% 40%, #1a0a3b 0%, #0a0418 55%, #000 100%)'
const defaultBgMid =
	'radial-gradient(ellipse 38% 28% at 50% 45%, rgba(255,212,255,0.9) 0%, rgba(183,109,255,0.55) 50%, rgba(26,10,59,0) 100%)'

export function defaultLenticularDots() {
	return [
		{ x: 18, y: 22, r: 1.4 },
		{ x: 78, y: 30, r: 1.6 },
		{ x: 28, y: 72, r: 1.3 },
		{ x: 86, y: 78, r: 1.2 },
		{ x: 58, y: 12, r: 1.1 },
		{ x: 8, y: 50, r: 1.0 },
		{ x: 92, y: 50, r: 1.2 },
		{ x: 50, y: 88, r: 1.1 },
	]
}

/** 进入光栅工作室前写入的临时数据（create → lenticular-studio） */
export const LENTICULAR_STUDIO_STORAGE_KEY = 'lenticular_studio_payload'

/** 单图工艺：create → 镭射工坊（Laser-Card 页）入口载荷 */
export const CASTLOVE_LASER_ENTRY_KEY = 'castlove_laser_entry_payload'

/**
 * 仅背景 + 主体两图层（无高光层），与光栅卡工作室一致
 * @param {string} bgSrc 背景图本地路径或 URL
 * @param {string} subjectSrc 主体图本地路径或 URL
 */
export function buildLenticularLayersTwo(bgSrc, subjectSrc) {
	return [
		{
			id: 'base',
			label: '背景',
			depth: 0,
			opacity: 1,
			blendMode: 'normal',
			parallaxFactor: 0.35,
			background: bgSrc ? undefined : defaultBgBase,
			dots: bgSrc ? undefined : defaultLenticularDots(),
			src: bgSrc || undefined,
		},
		{
			id: 'mid',
			label: '主体',
			depth: 0.55,
			opacity: 0.92,
			blendMode: 'screen',
			parallaxFactor: 0.7,
			background: subjectSrc ? undefined : defaultBgMid,
			src: subjectSrc || undefined,
		},
	]
}

/** 兼容旧预览：单图仅贴在主体层，仍带高光层 */
export function buildLenticularLayers(uploadSrc) {
	const mid = {
		id: 'mid',
		label: '主体',
		depth: 0.55,
		opacity: 0.92,
		blendMode: 'screen',
		parallaxFactor: 0.7,
		background: uploadSrc ? undefined : defaultBgMid,
		src: uploadSrc || undefined,
	}
	return [
		{
			id: 'base',
			label: '背景',
			depth: 0.0,
			opacity: 1,
			blendMode: 'normal',
			parallaxFactor: 0.35,
			background: defaultBgBase,
			dots: defaultLenticularDots(),
		},
		mid,
		{
			id: 'fx',
			label: '高光',
			depth: 0.9,
			opacity: 0.85,
			blendMode: 'lighten',
			parallaxFactor: 1.15,
			background: 'transparent',
			dots: [
				{ x: 20, y: 16, r: 3, color: '#ffffff' },
				{ x: 82, y: 22, r: 2.4, color: '#ffffff' },
				{ x: 14, y: 78, r: 3.2, color: '#4cd7f6' },
			],
		},
	]
}

/**
 * 构建与 POST /api/v1/assets/mints 一致的字段子集 + 本地预览所需字段
 * DTO: order_id, name, material_url, description, grade, tags, material_type, info
 */
export function buildCastloveFormSnapshot({
	nftInfo,
	materialTypes,
	materialTypeIndex,
	pageName,
	uploadedImage,
	uploadedImageBase64,
}) {
	const info = (nftInfo || '').trim()
	const material_type = materialTypes[materialTypeIndex] || '粉丝自制'
	const lines = info.split(/\n/).map((l) => l.trim()).filter(Boolean)
	const name =
		lines.length > 0
			? lines[0].slice(0, 80)
			: pageName === CRAFT_LENTICULAR_CN
				? '光栅卡作品'
				: pageName || '藏品'
	const tags = pageName === CRAFT_LENTICULAR_CN ? [CRAFT_TAG_LENTICULAR] : []
	return {
		image: uploadedImage,
		imageBase64: uploadedImageBase64,
		info,
		material_type,
		name,
		description: '',
		tags,
		craft_name: pageName || '',
		grade: 0,
	}
}