import express from "express";
import { authenticationGuard } from "../middleware/Authority.js";
import { needDatabase } from "../middleware/Database.js";
import User from "../schemas/User.js";
const UserController = express.Router();

UserController.post("/login", needDatabase, async (req, res) => {
    try {
        const email = req.body.email;
        const pwd = req.body.password;
        const user = await User.credentialsExist(email, pwd);
        if (!user) {
            res.sendStatus(401);
            return;
        } else {
            req.session.userId = user._id;
            req.session.email = user.email.value;
            res.status(200).send("Authenticated.");
        }
    } catch (error) {
        if (error.name === "TypeError") {
            res.status(400).send("Missing required user info.");
        } else if (error.message === "Credentials do not exist.") {
            res.status(401).send("Credentials do not exist.");
        } else {
            console.error(error);
            if (process.env.NODE_ENV === "development") {
                res.status(500).send(error.toString());
            } else {
                res.status(500).send("Internal server error. This issue has been noted.");
            }
        }
    }
});

UserController.get("/logout", authenticationGuard, (req, res) => {
    req.session.destroy((err) => {
        if (err) {
            console.error(err);
            if (process.env.NODE_ENV === "development") {
                res.status(500).send(err.toString());
            } else {
                res.status(500).send("Internal server error. This issue has been noted.");
            }
            res.status(500).send("");
        } else {
            res.sendStatus(200);
        }
    });
});

UserController.get("/email/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId);
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (selUser.email.public || curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ email: selUser.email.value });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

UserController.get("/firstName/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId);
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (selUser.firstName.public || curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ firstName: selUser.firstName.value });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

UserController.get("/lastName/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId);
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (selUser.lastName.public || curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ email: selUser.lastName.value });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

UserController.get("/phone/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId);
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (selUser.phone.public || curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ phone: selUser.phone.value });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

UserController.get("/participatingMatches/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId).populate("participatingMatches.value");
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (selUser.participatingMatches.public || curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ participatingMatches: selUser.participatingMatches.value });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

UserController.get("/joinDate/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId);
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ joinDate: selUser.joinDate });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

UserController.get("/createdMatches/:userId?", needDatabase, authenticationGuard, async (req, res) => {
    if (!req.params.userId) req.params.userId = req.session.userId;
    const curUser = await User.findById(req.session.userId).populate("createdMatches");
    const selUser = req.session.userId === req.params.userId ? curUser : await User.findById(req.params.userId);
    if (curUser._id === selUser._id || curUser.accessLevel > 2) {
        res.status(200).send({ createdMatches: selUser.createdMatches });
    } else {
        res.status(401).send("Could not authenticate request.");
    }
});

// TODO: Finish update requests using put.

UserController.post("/", needDatabase, async (req, res) => {
    try {
        let createdUser = new User({
            email: req.body.email,
            firstName: req.body.firstName,
            lastName: req.body.lastName,
            phone: req.body.phone,
            password: req.body.password,
        });
        await createdUser.save();
        res.sendStatus(201);
    } catch (err) {
        if (err.name === "TypeError" || err.name === "ValidationError") {
            if (process.env.NODE_ENV === "development") {
                console.error(err);
                res.status(400).send(err.toString());
            } else {
                res.status(400).send("Missing required user info.");
            }
        } else if (err.name === "MongoServerError" && err.message.startsWith("E11000")) {
            if (process.env.NODE_ENV === "development") {
                console.error(err);
                res.status(409).send(err.toString());
            } else {
                res.status(409).send("User already exists.");
            }
        } else {
            console.error(err);
            if (process.env.NODE_ENV === "development") {
                res.status(500).send(err.toString());
            } else {
                res.status(500).send("Internal server error. This issue has been noted.");
            }
        }
    }
});

export default UserController;