const { log } = require("../../src/util");
const { Settings } = require("../settings");
const { sendInfo } = require("../client");
const { checkLogin, isAdmin } = require("../util-server"); // Added isAdmin
const { R } = require("redbean-node"); // Added R for database operations
const User = require("../model/user"); // Added User model
const GameResolver = require("gamedig/lib/GameResolver");
const { testChrome } = require("../monitor-types/real-browser-monitor-type");
const fsAsync = require("fs").promises;
const path = require("path");

let gameResolver = new GameResolver();
let gameList = null;

/**
 * Get a game list via GameDig
 * @returns {object[]} list of games supported by GameDig
 */
function getGameList() {
    if (gameList == null) {
        gameList = gameResolver._readGames().games.sort((a, b) => {
            if ( a.pretty < b.pretty ) {
                return -1;
            }
            if ( a.pretty > b.pretty ) {
                return 1;
            }
            return 0;
        });
    }
    return gameList;
}

/**
 * Handler for general events
 * @param {Socket} socket Socket.io instance
 * @param {UptimeKumaServer} server Uptime Kuma server
 * @returns {void}
 */
module.exports.generalSocketHandler = (socket, server) => {
    socket.on("initServerTimezone", async (timezone) => {
        try {
            checkLogin(socket);
            log.debug("generalSocketHandler", "Timezone: " + timezone);
            await Settings.set("initServerTimezone", true);
            await server.setTimezone(timezone);
            await sendInfo(socket);
        } catch (e) {
            log.warn("initServerTimezone", e.message);
        }
    });

    socket.on("getGameList", async (callback) => {
        try {
            checkLogin(socket);
            callback({
                ok: true,
                gameList: getGameList(),
            });
        } catch (e) {
            callback({
                ok: false,
                msg: e.message,
            });
        }
    });

    socket.on("testChrome", (executable, callback) => {
        try {
            checkLogin(socket);
            // Just noticed that await call could block the whole socket.io server!!! Use pure promise instead.
            testChrome(executable).then((version) => {
                callback({
                    ok: true,
                    msg: {
                        key: "foundChromiumVersion",
                        values: [ version ],
                    },
                    msgi18n: true,
                });
            }).catch((e) => {
                callback({
                    ok: false,
                    msg: e.message,
                });
            });
        } catch (e) {
            callback({
                ok: false,
                msg: e.message,
            });
        }
    });

    socket.on("getPushExample", async (language, callback) => {
        try {
            checkLogin(socket);
            if (!/^[a-z-]+$/.test(language)) {
                throw new Error("Invalid language");
            }
        } catch (e) {
            callback({
                ok: false,
                msg: e.message,
            });
            return;
        }

        try {
            let dir = path.join("./extra/push-examples", language);
            let files = await fsAsync.readdir(dir);

            for (let file of files) {
                if (file.startsWith("index.")) {
                    callback({
                        ok: true,
                        code: await fsAsync.readFile(path.join(dir, file), "utf8"),
                    });
                    return;
                }
            }
        } catch (e) {

        }

        callback({
            ok: false,
            msg: "Not found",
        });
    });

    // Disconnect all other socket clients of the user
    socket.on("disconnectOtherSocketClients", async () => {
        try {
            checkLogin(socket);
            server.disconnectAllSocketClients(socket.userID, socket.id);
        } catch (e) {
            log.warn("disconnectAllSocketClients", e.message);
        }
    });

    // User Management Socket Handlers
    // Only admins should be able to manage users.

    socket.on("getUsers", async (callback) => {
        try {
            checkLogin(socket);
            await isAdmin(socket); // Ensure the user is an admin

            const userList = await R.findAll("user", "ORDER BY username");
            // Avoid sending password hashes to the client
            const sanitizedUserList = userList.map(user => {
                const { password, ...sanitizedUser } = user.export();
                return sanitizedUser;
            });

            callback({
                ok: true,
                users: sanitizedUserList,
            });
        } catch (e) {
            log.error("getUsers", e.message);
            callback({
                ok: false,
                msg: e.message,
            });
        }
    });

    socket.on("updateUserType", async (userID, newUserType, callback) => {
        try {
            checkLogin(socket);
            await isAdmin(socket); // Ensure the user is an admin

            if (!userID || !newUserType) {
                throw new Error("User ID and new user type are required.");
            }

            // Prevent admin from changing their own type if they are the only admin?
            // Or prevent changing the type of the main admin user? (e.g., user with ID 1)
            // For now, let's assume such checks are handled by higher-level logic or are not required.

            const user = await R.findOne("user", "id = ?", [userID]);
            if (!user) {
                throw new Error("User not found.");
            }

            // Potentially validate newUserType against a list of allowed types
            const allowedTypes = ["admin", "editor", "viewer"]; // Example types
            if (!allowedTypes.includes(newUserType)) {
                throw new Error(`Invalid user type: ${newUserType}. Allowed types are: ${allowedTypes.join(", ")}`);
            }

            user.user_type = newUserType;
            await R.store(user);

            // Optionally, emit an event to other admins that a user type has changed
            // server.sendToAdmins("userTypeChanged", { userID, newUserType });

            callback({
                ok: true,
                msg: `User type for user ID ${userID} updated to ${newUserType}.`,
            });

        } catch (e) {
            log.error("updateUserType", e.message);
            callback({
                ok: false,
                msg: e.message,
            });
        }
    });

};