import fetch from "./fetch";
import { githubConfig, giteeConfig } from "./config";
import CryptoJS from "crypto-js";
import OSS from "ali-oss";
import COS from "cos-js-sdk-v5";
import Buffer from "buffer-from";
import { v4 as uuidv4 } from "uuid";
import * as qiniu from "qiniu-js";
import { utf16to8, base64encode, safe64 } from "../assets/scripts/tokenTools";

function getConfig(useDefault, platform) {
  if (useDefault) {
    // load default config file
    const config = platform === "github" ? githubConfig : giteeConfig;
    const { username, repoList, branch, accessTokenList } = config;

    // choose random token from access_token list
    const tokenIndex = Math.floor(Math.random() * accessTokenList.length);
    const accessToken = accessTokenList[tokenIndex].replace("doocsmd", "");

    // choose random repo from repo list
    const repoIndex = Math.floor(Math.random() * repoList.length);
    const repo = repoList[repoIndex];

    return { username, repo, branch, accessToken };
  }

  // load configuration from localStorage
  const customConfig = JSON.parse(localStorage.getItem(`${platform}Config`));

  // split username/repo
  const repoUrl = customConfig.repo
    .replace(`https://${platform}.com/`, "")
    .replace(`http://${platform}.com/`, "")
    .replace(`${platform}.com/`, "")
    .split("/");
  return {
    username: repoUrl[0],
    repo: repoUrl[1],
    branch: customConfig.branch || "master",
    accessToken: customConfig.accessToken,
  };
}

function getDir() {
  const date = new Date();
  const year = date.getFullYear();
  const month = (date.getMonth() + 1).toString().padStart(2, "0");
  const day = date.getDate().toString().padStart(2, "0");
  return `${year}/${month}/${day}`;
}

function getDateFilename(filename) {
  const currentTimestamp = new Date().getTime();
  const fileSuffix = filename.split(".")[1];
  return `${currentTimestamp}-${uuidv4()}.${fileSuffix}`;
}

//-----------------------------------------------------------------------
// GitHub File Upload
//-----------------------------------------------------------------------

async function ghFileUpload(content, filename) {
  const useDefault = localStorage.getItem("imgHost") === "default";
  const { username, repo, branch, accessToken } = getConfig(
    useDefault,
    "github"
  );
  const dir = getDir();
  const url = `https://api.github.com/repos/${username}/${repo}/contents/${dir}/`;
  const dateFilename = getDateFilename(filename);
  const res = await fetch({
    url: url + dateFilename,
    method: "put",
    headers: {
      Authorization: `token ${accessToken}`,
    },
    data: {
      content,
      branch,
      message: `Upload by ${window.location.href}`,
    },
  });

  const githubResourceUrl = `raw.githubusercontent.com/${username}/${repo}/${branch}/`;
  const cdnResourceUrl = `cdn.jsdelivr.net/gh/${username}/${repo}@${branch}/`;
  return useDefault
    ? res.content.download_url.replace(githubResourceUrl, cdnResourceUrl)
    : res.content.download_url;
}

//-----------------------------------------------------------------------
// Gitee File Upload
//-----------------------------------------------------------------------

async function giteeUpload(content, filename) {
  const useDefault = localStorage.getItem("imgHost") === "default";
  const { username, repo, branch, accessToken } = getConfig(
    useDefault,
    "gitee"
  );
  const dir = getDir();
  const dateFilename = getDateFilename(filename);
  const url = `https://gitee.com/api/v5/repos/${username}/${repo}/contents/${dir}/${dateFilename}`;
  const res = await fetch({
    url,
    method: "POST",
    data: {
      content,
      branch,
      access_token: accessToken,
      message: `Upload by ${window.location.href}`,
    },
  });
  return encodeURI(res.content.download_url);
}

//-----------------------------------------------------------------------
// Qiniu File Upload
//-----------------------------------------------------------------------

function getQiniuToken(accessKey, secretKey, putPolicy) {
  const policy = JSON.stringify(putPolicy);
  const encoded = base64encode(utf16to8(policy));
  const hash = CryptoJS.HmacSHA1(encoded, secretKey);
  const encodedSigned = hash.toString(CryptoJS.enc.Base64);
  return `${accessKey}:${safe64(encodedSigned)}:${encoded}`;
}

async function qiniuUpload(file) {
  const { accessKey, secretKey, bucket, region, path, domain } = JSON.parse(
    localStorage.getItem("qiniuConfig")
  );
  const token = getQiniuToken(accessKey, secretKey, {
    scope: bucket,
    deadline: Math.trunc(new Date().getTime() / 1000) + 3600,
  });
  const dir = path ? `${path}/` : "";
  const dateFilename = dir + getDateFilename(file.name);
  const observable = qiniu.upload(file, dateFilename, token, {}, { region });
  return new Promise((resolve, reject) => {
    observable.subscribe({
      next: (result) => {
        console.log(result);
      },
      error: (err) => {
        reject(err.message);
      },
      complete: (result) => {
        resolve(`${domain}/${result.key}`);
      },
    });
  });
}

//-----------------------------------------------------------------------
// AliOSS File Upload
//-----------------------------------------------------------------------

async function aliOSSFileUpload(content, filename) {
  const dateFilename = getDateFilename(filename);
  const {
    region,
    bucket,
    accessKeyId,
    accessKeySecret,
    cdnHost,
    path,
  } = JSON.parse(localStorage.getItem("aliOSSConfig"));
  const buffer = Buffer(content, "base64");
  const dir = `${path}/${dateFilename}`;
  const client = new OSS({
    region,
    bucket,
    accessKeyId,
    accessKeySecret,
  });
  try {
    const res = await client.put(dir, buffer);
    if (cdnHost == "") return res.url;
    return `${cdnHost}/${path == "" ? dateFilename : dir}`;
  } catch (e) {
    return Promise.reject(e);
  }
}

//-----------------------------------------------------------------------
// TxCOS File Upload
//-----------------------------------------------------------------------

async function txCOSFileUpload(file) {
  const dateFilename = getDateFilename(file.name);
  const { secretId, secretKey, bucket, region, path, cdnHost } = JSON.parse(
    localStorage.getItem("txCOSConfig")
  );
  const cos = new COS({
    SecretId: secretId,
    SecretKey: secretKey,
  });
  return new Promise((resolve, reject) => {
    cos.putObject(
      {
        Bucket: bucket,
        Region: region,
        Key: `${path}/${dateFilename}`,
        Body: file,
      },
      function (err, data) {
        if (err) {
          reject(err);
        } else if (cdnHost) {
          resolve(
            path == ""
              ? `${cdnHost}/${dateFilename}`
              : `${cdnHost}/${path}/${dateFilename}`
          );
        } else {
          resolve(`https://${data.Location}`);
        }
      }
    );
  });
}

function fileUpload(content, file) {
  const imgHost = localStorage.getItem("imgHost");
  !imgHost && localStorage.setItem("imgHost", "default");
  switch (imgHost) {
    case "aliOSS":
      return aliOSSFileUpload(content, file.name);
    case "txCOS":
      return txCOSFileUpload(file);
    case "qiniu":
      return qiniuUpload(file);
    case "gitee":
      return giteeUpload(content, file.name);
    case "github":
      return ghFileUpload(content, file.name);
    default:
      // return file.size / 1024 < 1024
      //     ? giteeUpload(content, file.name)
      //     : ghFileUpload(content, file.name);
      return ghFileUpload(content, file.name);
  }
}

export default {
  fileUpload,
};