const {
    Events,
    MessageFlags
} = require("discord.js");

const {
    guardSessionInteraction
} = require("../utils/interactionSession");

require("dotenv").config();

module.exports = {
    name: Events.InteractionCreate,
    once: false,

    async execute(interaction) {
        if (interaction.isAutocomplete()) {
            return autocompleteHandler(interaction);
        }

        if (interaction.isChatInputCommand()) {
            return commandHandler(interaction);
        }

        if (interaction.isButton()) {
            return buttonHandler(interaction);
        }

        if (
            interaction.isMentionableSelectMenu() ||
            interaction.isUserSelectMenu()
        ) {
            return selectMenuHandler(interaction);
        }

        if (interaction.isModalSubmit()) {
            return modalHandler(interaction);
        }
    }
};

async function autocompleteHandler(interaction) {
    const command = interaction.client.commands.get(
        interaction.commandName
    );

    if (!command) {
        return console.error(
            `No command matching ${interaction.commandName} was found.`
        );
    }

    if (typeof command.autocomplete !== "function") {
        return;
    }

    try {
        await command.autocomplete(interaction);
    } catch (error) {
        console.error(
            `Autocomplete error for /${interaction.commandName}:`,
            error
        );

        try {
            await interaction.respond([]);
        } catch {}
    }
}

async function commandHandler(interaction) {
    const command = interaction.client.commands.get(
        interaction.commandName
    );

    if (!command) {
        return console.error(
            `No command matching ${interaction.commandName} was found.`
        );
    }

    try {
        await command.execute(interaction);
    } catch (error) {
        console.error(error);
        await sendInteractionError(
            interaction,
            "There was an error while executing this command!"
        );
    }
}

async function buttonHandler(interaction) {
    const allowed = await guardSessionInteraction(interaction);

    if (!allowed) {
        return;
    }

    const button = interaction.client.buttons.get(
        interaction.customId
    );

    if (!button) {
        return console.error(
            `No button registered matching ${interaction.customId}.`
        );
    }

    try {
        await button.execute(interaction);
    } catch (error) {
        console.error(error);
        await sendInteractionError(
            interaction,
            "There was an error while executing this button!"
        );
    }
}

async function selectMenuHandler(interaction) {
    const selectMenu = interaction.client.selectMenus.get(
        interaction.customId
    );

    if (!selectMenu) {
        return console.error(
            `No Select Menu registered matching ${interaction.customId}.`
        );
    }

    try {
        await selectMenu.execute(interaction);
    } catch (error) {
        console.error(error);
        await sendInteractionError(
            interaction,
            "There was an error while executing this select menu!"
        );
    }
}

async function modalHandler(interaction) {
    const customId = interaction.customId.split(":")[0];
    const modal = interaction.client.modals.get(customId);

    if (!modal) {
        return console.error(
            `No Modal registered matching ${interaction.customId}.`
        );
    }

    try {
        await modal.execute(interaction);
    } catch (error) {
        console.error(error);
        await sendInteractionError(
            interaction,
            "There was an error while executing this modal!"
        );
    }
}

async function sendInteractionError(interaction, content) {
    const payload = {
        content,
        flags: MessageFlags.Ephemeral
    };

    try {
        if (interaction.replied || interaction.deferred) {
            await interaction.followUp(payload);
        } else {
            await interaction.reply(payload);
        }
    } catch (error) {
        console.error("Failed to send interaction error response:", error);
    }
}