const { SlashCommandBuilder } = require('discord.js');
const { AttachmentBuilder, EmbedBuilder } = require('discord.js');

module.exports = {
	data: new SlashCommandBuilder()
		.setName('roll')
		.setDescription('Lance un dé!')
        .addStringOption(option =>
            option
                .setName('jet')
                .setDescription('Jet du dé (par ex: 2d6, par défaut 1d20)')),
	async execute(interaction) {
		await interaction.deferReply();

        // dice argument
        let jet = interaction.options.getString('jet') ?? '1d20';

        // REGEX FORMAT DICE RULE (i.e. 4d6, 10d12, 9d10, 10d5...)
        const diceRule = /^\d+d\d+$/;

        // dice format check
        if (!diceRule.test(jet)){
            interaction.editReply("Désolé, mais le format du jet est dégueulasse...");
            return;
        }

        // getting dice values
        let dice = jet.split('d');
        let nbDice = dice[0];
        let typeDice = dice[1];

        // negative or null dice values check
        if (nbDice <= 0 || typeDice <= 0) {
            interaction.editReply("Désolé, mais le format du jet est dégueulasse... (comment ça zéro ?)");
            return;
        }

        // constructing path to the image
        let pathThumbnail = "";
        if (typeDice == 4 || typeDice == 6 || typeDice == 8 || typeDice == 10 || typeDice == 12) {
            pathThumbnail = 'dice_icons/d' + typeDice.toString() + '.png'
        } else {
            pathThumbnail = 'dice_icons/default.png'
        }
        // attachment of the image
        const file = new AttachmentBuilder(pathThumbnail, { name : 'dice.png' });

        // initializing result vars
        let result = 0;
        let resultText = "";
        for (let i = 0 ; i < nbDice ; i++) {
            let tmp = getRandomInt(typeDice)
            result += tmp;
            resultText += tmp.toString()
            if (i != nbDice-1) {
                resultText += ' + '
            }
        }
        
        // replying embeded message
        interaction.editReply({ embeds: 
            [
                new EmbedBuilder()
                    .setTitle("Lancer de dé")
                    .setURL("https://www.youtube.com/watch?v=dQw4w9WgXcQ")
                    .setThumbnail('attachment://dice.png') // trouver la bonne image
                    .addFields(
                        { name: "Vous avez lancé...", value: jet.toString() },
                        { name: "Vos jets :", value: resultText },
                        { name: "Votre résultat est...", value: result.toString() }
                    )
            ], files: [file]
        });
	},
};

// get random integer from 1 to max included
function getRandomInt(max) {
    return Math.floor(Math.random() * (max-1))+1;
}