import fs from 'fs';
const pagesPath = "./src/html/pages/";

async function genHandler() {
    const handler = {
        get: [],
        post: [],
        path: [],
        delete: [],
    };
    let numberOfPages = 0;
    const endpointFiles = fs
        .readdirSync(pagesPath, { recursive: true })
        .filter((file) => file.endsWith(".js"));
    console.log(endpointFiles)
    for (const file of endpointFiles) {
        const { default: endpoint } = await import(`.${pagesPath}/${file}`);
        handler[endpoint.type].push(endpoint);
        console.log(
            `\x1b[32mChargement de ${endpoint.type.toUpperCase()}: ${endpoint.path} !\x1b[0m`,
        );
        numberOfPages++;
        console.log(numberOfPages + " endpoints chargés ! ");
    }
    return handler;
}

async function deployHandler(app) {
    const handler = await genHandler();

    for(const endpoint of handler.get) {
        app.get(endpoint.path, async (request, response) => {
            const [path, args] = parseURL(request.originalUrl);
            console.log("GET: " + path);
            
            if (endpoint.requiresLogin && !request.session.user) {
                return response.redirect("/login");
            }
            if (endpoint.permissions) {
                if((endpoint.permissions & request.session.user.permissions) == 0) {
                    return response.status(403).send("Vous n'avez pas la permission d'effectuer cette action !");
                }
            }
            return await endpoint.execute(
                request,
                response,
            );
        });
    }

    for(const endpoint of handler.post) {
        app.post(endpoint.path, async (request, response) => {
            console.log("POST: " + request.originalUrl);
            
            if (endpoint.requiresLogin && !request.session.user) {
                return response.redirect("/login");
            }
            if (endpoint.permissions) {
                if((endpoint.permissions & request.session.user.permissions) == 0) {
                    return response.status(403).send("Vous n'avez pas la permission d'effectuer cette action !");
                }
            }
            return await endpoint.execute(
                request,
                response,
            );
        });
    }

    for(const endpoint of handler.delete) {
        app.delete(endpoint.path, async (request, response) => {
            console.log("DELETE: " + request.originalUrl);
            
            if (endpoint.requiresLogin && !request.session.user) {
                return response.redirect("/login");
            }
            if (endpoint.permissions) {
                if((endpoint.permissions & request.session.user.permissions) == 0) {
                    return response.status(403).send("Vous n'avez pas la permission d'effectuer cette action !");
                }
            }
            return await endpoint.execute(
                request,
                response,
            );
        });
    }
}

function parseURL(URL) {
    const spURL = URL.split("?");
    const path = spURL[0];
    if(!spURL[1]) return [path, {}];

    const args = {};
    for (let i = 0; i < spURL[1].split("=").length; i+=2) {
        const key = spURL[1].split("=")[i];
        const val = spURL[1].split("=")[i+1];
        args[key] = val;
    }
    return [path, args];
}

function recursiveFileSearch(directory) {
    const files = [];
    fs.readdirSync(directory).forEach(File => {
        const Absolute = Path.join(directory, File);
        if (fs.statSync(Absolute).isDirectory()) return ThroughDirectory(Absolute);
        else return files.push(Absolute);
    });
    return files;
}

export { deployHandler, parseURL };