import express from "express";
import swaggerui from "swagger-ui-express";
import fs from "fs";
import YAML from "yaml";
import dotenv from "dotenv";
import UserRoute from "./app/routes/user.route.js";
import ChannelRoute from "./app/routes/channel.route.js";
import VideoRoute from "./app/routes/video.route.js";
import CommentRoute from "./app/routes/comment.route.js";
import RecommendationRoute from "./app/routes/redommendation.route.js";
import * as http from "node:http";
import cors from "cors";
import PlaylistRoute from "./app/routes/playlist.route.js";
import {initDb} from "./app/utils/database.js";
import MediaRoutes from "./app/routes/media.routes.js";
import SearchRoute from "./app/routes/search.route.js";
import OAuthRoute from "./app/routes/oauth.route.js";
import session from "express-session";
import passport from "passport";
import { Strategy as GitHubStrategy } from "passport-github2";

console.clear();
dotenv.config();



const app = express();

// Increase body size limits for file uploads
app.use(express.urlencoded({extended: true, limit: '500mb'}));
app.use(express.json({limit: '500mb'}));

app.use(session({
  secret: "your-secret",
  resave: false,
  saveUninitialized: false,
}));

// Swagger setup
const file = fs.readFileSync('./swagger.yaml', 'utf8');
const swaggerDocument = YAML.parse(file);

// Swagger UI options
const swaggerOptions = {
  explorer: true,
  swaggerOptions: {
    requestInterceptor: (req) => {
      req.headers['Content-Type'] = 'application/json';
      return req;
    }
  }
};

app.use('/api/api-docs', swaggerui.serve, swaggerui.setup(swaggerDocument, swaggerOptions));

// --- Passport setup ---
app.use(passport.initialize());
app.use(passport.session());

// Serialize user -> session
passport.serializeUser((user, done) => {
  done(null, user);
});

// Deserialize session -> user
passport.deserializeUser((obj, done) => {
  done(null, obj);
});

// --- GitHub Strategy ---
    passport.use(new GitHubStrategy({
        clientID: process.env.GITHUB_ID,  
        clientSecret: process.env.GITHUB_SECRET,
        callbackURL: "https://localhost/api/oauth/callback",
        scope: ["user:email"]
    },
        (accessToken, refreshToken, profile, done) => {

        return done(null, profile);
        }
    ));

// ROUTES
app.use("/api/users/", UserRoute);
app.use("/api/channels/", ChannelRoute);
app.use("/api/videos/", VideoRoute);
app.use("/api/comments/", CommentRoute);
app.use("/api/playlists", PlaylistRoute);
app.use("/api/recommendations", RecommendationRoute);
app.use("/api/media", MediaRoutes);
app.use("/api/search", SearchRoute);
app.use("/api/oauth", OAuthRoute);

const port = process.env.BACKEND_PORT;

if (process.env.NODE_ENV !== "test") {
    const server = http.createServer(app);
    server.listen(port, '0.0.0.0', async () => {
        
        console.log(`Server started on port ${port}`);
        await initDb();
        console.log("Database initialized successfully.");

    });
}

export default app;