import fs from "fs"
import { join, dirname } from "path"

process.stdin.setEncoding("utf8");

function readlineSync(msg = "Input：") {
    return new Promise((resolve, reject) => {
        console.log(msg)
        process.stdin.resume();
        process.stdin.on("data", function (data) {
            process.stdin.pause();
            resolve(data.substring(0, data.length - 2));
        });
    });
}

// entry point
async function main() {
    let jsonpath = await readlineSync("Input the JSON Path：");
    let srcpath = await readlineSync("Input the src Path：");
    let distpath = await readlineSync("Input the dist Path：");

    let json = JSON.parse(fs.readFileSync(jsonpath, "utf8"));

    json.forEach(element => {
        let hash = element.hash;
        let srcfilepath = join(srcpath, hash.substring(0, 2), hash);
        let distfilepath = join(distpath, element.path);

        if (!fs.existsSync(distfilepath)) {
            fs.mkdirSync(dirname(distfilepath), { recursive: true });
        }

        if (fs.existsSync(srcfilepath)) {
            fs.copyFileSync(srcfilepath, distfilepath);
        } else {
            console.log(`文件不存在：${srcfilepath}`)
        }
    });
}

main();