import * as path from "path"
import * as fs from "fs";

import DefaultHandler from "./default.js";

export default class StaticHandler extends DefaultHandler {
    constructor(basePath, directoryList = false) {
        super();

        this.basePath = basePath;
        this.directoryList = directoryList;

        //This will throw if the file doesn't exist
        this.isSingleFile = !fs.statSync(basePath).isDirectory();

        this.matchesSubpaths = !this.isSingleFile;
    }

    // This is the handler
    // url is the URL object, with url.pathname being the path. p is the 'client-side' basepath
    handle (url, p) {
        const relativePath = path.relative(p, url.pathname);
        //Concat and normalize the passed URL as being relative to the base path
        const toServe = path.join(this.basePath, relativePath);
        //If the resulting path is a parent, relative to basePath, disallow that
        if (path.relative(this.basePath, toServe).startsWith("..")) {
            return "50"
        }

        console.log(`Attempting to serve ${toServe}.`);
        try {
            if (fs.statSync(toServe).isDirectory()) {
                console.log(`File is a directory and directoryList is ${this.directoryList}.`);
                if (this.directoryList) {

                } else {
                    return "51 Not Found\r\n";
                }
            }
        }catch (e) {
            //If the file doesn't exist
            console.log(`File doesn't exist or can't be opened.`)
            return "51 Not Found\r\n";
        }

        //TODO: import mmmagic
        //TODO: convert line endings
        const data = fs.readFileSync(toServe);
        return "20 text/gemini\r\n" + data;
    }
}