const screen = uni.getSystemInfoSync().windowWidth / 750
export function toPx(value, baseSize) {
	// 如果是数字
	if (typeof value === 'number') {
		return value
	}
	// 如果是字符串数字
	if (isNumber(value)) {
		return value * 1
	}
	// 如果有单位
	if (typeof value === 'string') {
		const reg = /^-?[0-9]+([.]{1}[0-9]+){0,1}(rpx|px|%)$/g
		const results = reg.exec(value);
		if (!value || !results) {
			return 0;
		}
		const unit = results[2];
		value = parseFloat(value);
		let res = 0;
		if (unit === 'rpx') {
			res = Math.round(value * (screen || 0.5) * 1);
		} else if (unit === 'px') {
			res = Math.round(value * 1);
		} else if (unit === '%') {
			res = Math.round(value * toPx(baseSize) / 100);
		}
		return res;
	}
}

export function isNumber(value) {
	return /^-?\d+(\.\d+)?$/.test(value);
}

/** 从 0x20 开始到 0x80 的字符宽度数据 */
export const CHAR_WIDTH_SCALE_MAP = [0.296, 0.313, 0.436, 0.638, 0.586, 0.89, 0.87, 0.256, 0.334, 0.334, 0.455, 0.742,
	0.241, 0.433, 0.241, 0.427, 0.586, 0.586, 0.586, 0.586, 0.586, 0.586, 0.586, 0.586, 0.586, 0.586, 0.241, 0.241, 0.742,
	0.742, 0.742, 0.483, 1.031, 0.704, 0.627, 0.669, 0.762, 0.55, 0.531, 0.744, 0.773, 0.294, 0.396, 0.635, 0.513, 0.977,
	0.813, 0.815, 0.612, 0.815, 0.653, 0.577, 0.573, 0.747, 0.676, 1.018, 0.645, 0.604, 0.62, 0.334, 0.416, 0.334, 0.742,
	0.448, 0.295, 0.553, 0.639, 0.501, 0.64, 0.567, 0.347, 0.64, 0.616, 0.266, 0.267, 0.544, 0.266, 0.937, 0.616, 0.636,
	0.639, 0.64, 0.382, 0.463, 0.373, 0.616, 0.525, 0.79, 0.507, 0.529, 0.492, 0.334, 0.269, 0.334, 0.742, 0.296
];

/**
 * @param {Object} base64data
 */
export function base64src(base64data) {
	return new Promise((resolve, reject) => {
		const fs = uni.getFileSystemManager()
		//自定义文件名
		const [, format, bodyData] = /data:image\/(\w+);base64,(.*)/.exec(base64data) || [];
		if (!format) {
			reject(new Error('ERROR_BASE64SRC_PARSE'))
		}
		const time = new Date().getTime();
		// #ifdef MP-TOUTIAO
		const filePath = `${tt.env.USER_DATA_PATH}/${time}.${format}`
		// #endif
		// #ifdef MP-WEIXIN
		const filePath = `${wx.env.USER_DATA_PATH}/${time}.${format}`
		// #endif
		// #ifdef MP-BAIDU
		const filePath = `${bd.env.USER_DATA_PATH}/${time}.${format}`
		// #endif
		// #ifdef MP-ALIPAY
		const filePath = `${my.env.USER_DATA_PATH}/${time}.${format}`
		// #endif
		// #ifdef MP-QQ
		const filePath = `${qq.env.USER_DATA_PATH}/${time}.${format}`
		// #endif
		// #ifdef MP-360
		const filePath = `${qh.env.USER_DATA_PATH}/${time}.${format}`
		// #endif
		const buffer = uni.base64ToArrayBuffer(bodyData)
		fs.writeFile({
			filePath,
			data: buffer,
			encoding: 'binary',
			success() {
				resolve(filePath)
			},
			fail(err) {
				console.error('获取base64图片失败', JSON.stringify(err))
				reject(err)
			}
		})
	})
}

/**
 * base64 to blob二进制
 */
export function dataURItoBlob(dataURI) {
	let mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]; // mime类型
	let byteString = atob(dataURI.split(',')[1]); //base64 解码
	let arrayBuffer = new ArrayBuffer(byteString.length); //创建缓冲数组
	let intArray = new Uint8Array(arrayBuffer); //创建视图

	for (let i = 0; i < byteString.length; i++) {
		intArray[i] = byteString.charCodeAt(i);
	}
	return new Blob([intArray], {
		type: mimeString
	});
}