import { ButtonInteraction, MessageFlags } from "discord.js";
import { inventoryService } from "@/modules/inventory/inventory.service";
import { userService } from "@/modules/user/user.service";
import { createErrorEmbed, createWarningEmbed } from "@/lib/embeds";

export async function handleShopInteraction(interaction: ButtonInteraction) {
    if (!interaction.customId.startsWith("shop_buy_")) return;

    try {
        await interaction.deferReply({ flags: MessageFlags.Ephemeral });

        const itemId = parseInt(interaction.customId.replace("shop_buy_", ""));
        if (isNaN(itemId)) {
            await interaction.editReply({ embeds: [createErrorEmbed("Invalid Item ID.")] });
            return;
        }

        const item = await inventoryService.getItem(itemId);
        if (!item || !item.price) {
            await interaction.editReply({ embeds: [createErrorEmbed("Item not found or not for sale.")] });
            return;
        }

        const user = await userService.getOrCreateUser(interaction.user.id, interaction.user.username);

        // Double check balance here too, although service handles it, we want a nice message
        if ((user.balance ?? 0n) < item.price) {
            await interaction.editReply({ embeds: [createWarningEmbed(`You need ${item.price} 🪙 to buy this item. You have ${user.balance} 🪙.`)] });
            return;
        }

        const result = await inventoryService.buyItem(user.id, item.id, 1n);

        await interaction.editReply({ content: `✅ **Success!** You bought **${item.name}** for ${item.price} 🪙.` });

    } catch (error: any) {
        console.error("Shop Purchase Error:", error);
        await interaction.editReply({ embeds: [createErrorEmbed(error.message || "An error occurred while processing your purchase.")] });
    }
}