const express = require('express');
const cors = require('cors');
const app = express();
const bodyParser = require('body-parser');
const checkPermissions = require('./middlewares/check-permissions');
const modifyPath = require('./middlewares/modify-path');
const VCS = require('./services/vcs');

const executorRoutes = require('./routes/executor');
const vcsRoutes = require('./routes/vcs');

async function initAndCheckRepo() {
    try {
        const projectId = '31986';
        const result = await VCS.initRepo(projectId);
        console.log(result?.message ? result.message : result);
        return true;
    } catch (err) {
        console.error('Error during repo initialization:', err);
        throw new Error('Critical error: Git repository initialization failed.');
    }
}

async function startServer() {
    const PORT = process.env.APP_SHELL_PORT || 4000;
    try {
        await initAndCheckRepo();

        return new Promise((resolve, reject) => {
            app.listen(PORT, (err) => {
                if (err) {
                    console.error(`Failed to listen on port ${PORT}:`, err);
                    return reject(err);
                }
                console.log(`Listening on port ${PORT}`);
                resolve();
            });
        });

    } catch (error) {
        console.error(`[ERROR] Server startup failed due to: ${error.message}`);
        throw error;
    }
}

app.use(cors({ origin: true }));
app.use(bodyParser.json());
app.use(checkPermissions);
app.use(modifyPath);

app.use('/executor', executorRoutes);
app.use('/vcs', vcsRoutes);

(async () => {
    try {
        await startServer();
        console.log("App-shell server is fully ready!");
    } catch (error) {
        console.error("App-shell failed to start completely:", error);
        process.exit(1);
    }
})();

module.exports = app;