/**
 * 扫码拍照回传工具 (H5 only)
 *
 * 二维码把会议上下文塞进 URL query (ry-h5 hash 路由, base=/camera/):
 *   http://host:8090/camera/#/pages/panorama/index?meetingId=1&subType=L_PANORAMA_FRONT&apiBase=http%3A%2F%2Fhost%3A5173%2Fdev-api
 *
 * - getCameraParams(): 从 hash 里解析 meetingId / subType / apiBase
 * - uploadCameraPhoto(base64): 拍照 Base64 → 直传 OSS → 回传 URL 到后端 /business/meetingMaterial/cameraUpload
 *
 * 公开上传, 无需 token (后端 SecurityConfig 已 permitAll + 白名单 subType 兜底).
 */
export type CameraParams = {
	apiBase: string
	meetingId: string
	subType: string
}

/** 从 hash 路由的 query 里解析会议上下文 */
export function getCameraParams(): CameraParams {
	const hash = window.location.hash || ''
	const qs = hash.includes('?') ? hash.split('?')[1] : ''
	const search = qs || (window.location.search || '').replace(/^\?/, '')
	const sp = new URLSearchParams(search)
	return {
		apiBase: sp.get('apiBase') || '',
		meetingId: sp.get('meetingId') || '',
		subType: sp.get('subType') || '',
	}
}

type OssSign = {
	code: number
	msg: string
	host: string
	dir: string
	accessKeyId: string
	policy: string
	signature: string
	expire: number
}

/** 拿 OSS 直传签名 (GET /common/oss/sign?dir=...) */
async function getOssSign(apiBase: string, dir: string): Promise<OssSign> {
	const url = `${apiBase}/common/oss/sign?dir=${encodeURIComponent(dir)}`
	const resp = await fetch(url)
	const data = (await resp.json()) as OssSign
	if (data.code !== 200) throw new Error(data.msg || 'OSS 签名失败')
	return data
}

/** Base64 JPEG → 直传 OSS bucket, 返回完整 URL */
async function uploadBase64ToOss(apiBase: string, base64: string, dir: string): Promise<string> {
	const sign = await getOssSign(apiBase, dir)
	const key = sign.dir + Date.now() + '_' + Math.random().toString(36).slice(2, 8) + '.jpg'

	// data:image/jpeg;base64,... → Blob (fetch data URL 最省事, 免手写 base64 解码)
	const blobResp = await fetch(base64)
	const blob = await blobResp.blob()

	const fd = new FormData()
	fd.append('key', key)
	fd.append('policy', sign.policy)
	fd.append('OSSAccessKeyId', sign.accessKeyId)
	fd.append('signature', sign.signature)
	fd.append('success_action_status', '200')
	fd.append('Content-Type', 'image/jpeg')
	fd.append('file', blob, 'camera.jpg')

	const resp = await fetch(sign.host, { method: 'POST', body: fd })
	if (!resp.ok) throw new Error('OSS 上传失败: HTTP ' + resp.status)
	return sign.host + '/' + key
}

/** 回传 OSS URL 数组到后端 (POST /business/meetingMaterial/cameraUpload) */
async function cameraUpload(
	apiBase: string,
	meetingId: string,
	subType: string,
	ossUrls: string[],
	extraOssUrls: string[]
): Promise<void> {
	const resp = await fetch(`${apiBase}/business/meetingMaterial/cameraUpload`, {
		method: 'POST',
		headers: { 'Content-Type': 'application/json' },
		body: JSON.stringify({ meetingId: Number(meetingId), subType, ossUrls, extraOssUrls }),
	})
	const data = (await resp.json()) as { code: number; msg: string }
	if (data.code !== 200) throw new Error(data.msg || '照片回传失败')
}

/** 连拍多张: 每张 sharp + 可选高斯模糊版 (签到表). 批量直传 OSS 后一次性回传数组存库. */
export type CameraShot = { sharp: string; blurred: string }

/** 拍照后调用 (单张): 直传 OSS + 回传 URL 存库. 签到表额外上传高斯模糊版作为 extraOssUrl. */
export async function uploadCameraPhoto(base64: string, blurredBase64: string): Promise<void> {
	const p = getCameraParams()
	if (!p.apiBase) throw new Error('缺少 apiBase 参数')
	if (!p.meetingId) throw new Error('缺少 meetingId 参数')
	if (!p.subType) throw new Error('缺少 subType 参数')

	const dir = `ry8080/meeting/${p.meetingId}/camera/`
	const ossUrl = await uploadBase64ToOss(p.apiBase, base64, dir)

	// 签到表: 额外上传脱敏版 (A4 70%~85% 高斯模糊), sponsor 只看这个隐藏手机号/身份证号
	let extraOssUrl = ''
	if (p.subType === 'L_SIGN_IN' && blurredBase64) {
		extraOssUrl = await uploadBase64ToOss(p.apiBase, blurredBase64, dir + 'masked/')
	}

	await cameraUpload(p.apiBase, p.meetingId, p.subType, [ossUrl], extraOssUrl ? [extraOssUrl] : [])
}

/** 拍照后调用 (连拍多张): 每张直传 OSS + 签到表额外上传高斯模糊版, 一次性回传数组存库. */
export async function uploadCameraPhotos(list: CameraShot[]): Promise<void> {
	const p = getCameraParams()
	if (!p.apiBase) throw new Error('缺少 apiBase 参数')
	if (!p.meetingId) throw new Error('缺少 meetingId 参数')
	if (!p.subType) throw new Error('缺少 subType 参数')
	if (!list || !list.length) throw new Error('没有可上传的照片')

	const dir = `ry8080/meeting/${p.meetingId}/camera/`
	const ossUrls: string[] = []
	const extraOssUrls: string[] = []
	for (const s of list) {
		ossUrls.push(await uploadBase64ToOss(p.apiBase, s.sharp, dir))
		if (p.subType === 'L_SIGN_IN' && s.blurred) {
			extraOssUrls.push(await uploadBase64ToOss(p.apiBase, s.blurred, dir + 'masked/'))
		} else {
			extraOssUrls.push('')
		}
	}

	await cameraUpload(p.apiBase, p.meetingId, p.subType, ossUrls, extraOssUrls)
}