import crypto from "crypto"

/**
 * 鉴权加密
 * @param {*} params
 * @returns
 */
export function getEncodeHeader(
    params = {},
    appKey: string,
    appSecret: string
) {
    const timestamp = parseInt(Date.now() / 1000 + "")
    const nonce = parseInt(Math.random() * 100000 + "") + timestamp
    const header = {
        "x-bili-accesskeyid": appKey,
        "x-bili-content-md5": getMd5Content(JSON.stringify(params)),
        "x-bili-signature-method": "HMAC-SHA256",
        "x-bili-signature-nonce": nonce + "",
        "x-bili-signature-version": "1.0",
        "x-bili-timestamp": timestamp
    }
    const data: string[] = []
    for (const key in header) {
        data.push(`${key}:${header[key]}`)
    }

    const signature = crypto
        .createHmac("sha256", appSecret)
        .update(data.join("\n"))
        .digest("hex")
    return {
        Accept: "application/json",
        "Content-Type": "application/json",
        ...header,
        Authorization: signature
    }
}

/**
 * MD5加密
 * @param {*} str
 * @returns
 */
export function getMd5Content(str) {
    return crypto
        .createHash("md5")
        .update(str)
        .digest("hex")
}