export const saveImage = (url) => {
	uni.showLoading({
		title: '正在保存图片...'
	});
	uni.getSetting({
		success: async (res) => {
			if (!res.authSetting["scope.writePhotosAlbum"]) {
				uni.authorize({
					scope: "scope.writePhotosAlbum",
					success: async () => {
						const res = await uni.getImageInfo({
							src: url
						});
						uni.saveImageToPhotosAlbum({
							filePath: res.path,
							success: () => {
								uni.hideLoading();
								uni.showToast({
									title: "保存成功！"
								});
							},
							fail: () => {
								uni.showToast({
									title: "保存失败，请重试！",
									icon: 'error'
								});
							}
						});
					},
					fail: () => {
						uni.hideLoading();
						uni.showModal({
							title: "权限未授权",
							content: "请前往设置中开启相册权限",
							success: (res) => {
								if (res.confirm) {
									uni.openSetting();
								}
							}
						});
					}
				});
			} else {
				const res = await uni.getImageInfo({
					src: url
				});
				uni.saveImageToPhotosAlbum({
					filePath: res.path,
					success: () => {
						uni.hideLoading();
						uni.showToast({
							title: "保存成功！"
						});
					},
					fail: () => {
						uni.showToast({
							title: "保存失败，请重试！",
							icon: 'error'
						});
					}
				});
			}
		},
		fail: () => {
			uni.hideLoading();
			uni.showToast({
				title: "获取权限失败！",
				icon: 'error'
			});
		}
	});
};

/**
 * 将可选文本归一化为空字符串。
 */
export const normalizeOptionalText = (value) => {
	return typeof value === 'string' ? value.trim() : ''
}

const APP_INVITE_CODE_STORAGE_KEY = 'appAutoInviteCode'

/**
 * 缓存自动识别的邀请码，供注册页优先读取。
 */
export const cacheAppInviteCode = (inviteCode) => {
	const normalizedInviteCode = normalizeOptionalText(inviteCode).toUpperCase()
	if (!/^[A-Z0-9]{6}$/.test(normalizedInviteCode)) {
		return
	}
	uni.setStorageSync(APP_INVITE_CODE_STORAGE_KEY, normalizedInviteCode)
}

/**
 * 读取并消费自动识别的邀请码。
 */
export const consumeAppInviteCode = () => {
	const inviteCode = normalizeOptionalText(uni.getStorageSync(APP_INVITE_CODE_STORAGE_KEY)).toUpperCase()
	if (!/^[A-Z0-9]{6}$/.test(inviteCode)) {
		return ''
	}
	uni.removeStorageSync(APP_INVITE_CODE_STORAGE_KEY)
	return inviteCode
}