/* REPLACE <ID> WITH YOUR USER ID AND <TOKEN> WITH YOUR USER TOKEN. */

var discord = require("discord.js");
var client = new discord.Client();

var fs = require("fs"),
    time = 10000,
    settings = {}

var runtimes = {};

fs.readFile(__dirname + "/settings.json", (error, data) => {
    if (error) return fs.writeFile(__dirname + "/settings.json", "{\"tags\":{}}", e => {});

    settings = JSON.parse(data);
});


client.on("message", message => {
    if (message.author.id != <id>) return;

    var args = message.content.split(" ");

     /* ///////////////// NODE.JS EXECUTION ///////////////// */
    if (args[0] == "::eval") {
        message.delete();

        message.channel.send({
            embed: {
                title: "Executing Javascript",
                color: 0x336699,
                description: "Executing Javascript. Please wait."
            }
        }).then(messag => {
            var arg2 = args.splice(1).join(" ");

            var code = arg2.replace(/\`\`\`(js|javascript)/, "");

            if (code == arg2) {
                code = arg2.replace("```", "");

                if (code == args.splice(1).join(" ")) {
                    return messag.edit({
                        embed: {
                            title: "Node.js Runtime Environment",
                            color: 0x336699,
                            description: "Failed to execute code: Invalid command syntax."
                        }
                    });
                }
            }
            code = code.substring(0, code.length - 3);

            var id = Math.random().toString(36).substr(7, 3), output = "\n";

            fs.writeFile(`${__dirname}/nodejs_execute_${id}.js`, code, err => {
                if (err) return messag.edit({
                    embed: {
                        title: "Executing Javascript",
                        color: 0x336699,
                        description: "Failed to execute code, could not write file."
                    }
                });
                messag.edit({
                    embed: {
                        title: "Executing Javascript",
                        color: 0x336699,
                        description: "**Code:**```js\n" + code + "```**Output:**``` ```"
                    }
                });

                var child_process = require("child_process");

                var _ = child_process.exec(`node "${__dirname}/nodejs_execute_${id}.js"`, (error, stdout, stdin) => {
                    if (!error) messag.edit({
                        embed: {
                            title: "Executing Javascript",
                            color: 0x336699,
                            description: "**Code:**```js\n" + code + "```**Output:**```" + stdout.toString() + "```"
                        }
                    }); else messag.edit({
                        embed: {
                            title: "Executing Javascript",
                            color: 0x336699,
                            description: "**Code:**```js\n" + code + "```**Error:**```" + error.toString().replace(/C:\\Users\\.+(?:\\)/g, "<path>/") + "```"
                        }
                    });
                    fs.unlink(`${__dirname}/nodejs_execute_${id}.js`, () => {});
                });
            });
        });
    }

    /* ///////////////// NODE.JS ENVIRONMENT ///////////////// */
    if (args[0] == "::nodejs-runtime" || args[0] == "::nrt") {
        message.delete();

        message.channel.send({
            embed: {
                title: "Node.js Runtime Environment",
                color: 0x336699,
                description: "Preparing Node.js Runtime Environment, please stand by."
            }
        }).then(messag => {
            var code = args.splice(1).join(" ").replace(/\`\`\`(js|javascript)/, "");

            if (code == args.splice(1).join(" ")) {
                code = args.splice(1).join(" ").replace("```", "");

                if (code == args.splice(1).join(" ")) {
                    return messag.edit({
                        embed: {
                            title: "Node.js Runtime Environment",
                            color: 0x336699,
                            description: "Failed to execute code: Invalid command syntax."
                        }
                    });
                }
            }
            code = code.substring(0, code.length - 3);

            var id = Math.random().toString(36).substr(7, 3), output = "\n";

            fs.writeFile(`${__dirname}/nodejs_environment_${id}.js`, code, err => {
                if (err) return messag.edit({
                    embed: {
                        title: "Node.js Runtime Environment",
                        color: 0x336699,
                        description: "Failed to execute code, could not write file."
                    }
                });
                messag.edit({
                    embed: {
                        title: "Node.js Runtime Environment",
                        color: 0x336699,
                        description: "**ID: " + id + "**\n**Code:**```js\n" + code + "```**Output:**``` ```"
                    }
                });

                var child_process = require("child_process");

                runtimes[id] = child_process.spawn(`node`, [`${__dirname}/nodejs_environment_${id}.js`]);

                runtimes[id].stdout.on("data", (d) => {
                    output = output + d.toString();

                    messag.edit({
                        embed: {
                            title: "Node.js Runtime Environment",
                            color: 0x336699,
                            description: "**ID: " + id + "**\n**Code:**```js\n" + code + "```**Output:**```" + output + "```"
                        }
                    });
                });
                runtimes[id].on("exit", (d) => {

                    message.channel.send({
                        embed: {
                            title: "Node.js Runtime Environment",
                            color: 0x336699,
                            description: `NRE \`${id}\` has closed.`
                        }
                    });

                    fs.unlink(`${__dirname}/nodejs_environment_${id}.js`, () => {});
                });
                runtimes[id].stderr.on("data", (d) => {
                    messag.edit({
                        embed: {
                            title: "Node.js Runtime Environment",
                            color: 0x336699,
                            description: "**ID: " + id + "**\n**Code:**```js\n" + code + "```**Output:**```" + output + "```**Error:**```" + d.toString().replace(/C:\\Users\\.+(?:\\)/g, "<path>/") + "```"
                        }
                    });
                });
            });
        });
    }
    if (args[0] == "::close-rt") {
        message.delete();

        runtimes[args[1]].stdin.pause();
        runtimes[args[1]].kill();
    }
    if (args[0] == "::tag") {
        message.delete();

        if (!args[1]) return;

        if (args[1] == "-c") {
            if (args[2] && args[3]) {
                settings.tags[args[2]] = args.splice(3).join(" ");
            }
        } else if (args[1] == "-l") {
            message.channel.send({
                embed: {
                    title: "Tag",
                    color: 0x336699,
                    description: Object.keys(settings.tags).toString()
                }
            });
        } else {
            message.channel.send(settings.tags[args[1]] || `Tag '${args[1]}' not found.`);
        }

        fs.writeFile(`${__dirname}/settings.json`, JSON.stringify(settings), err => {});
    }
});

client.login("<token>");