import { ActionRowBuilder, ButtonBuilder, ButtonStyle, AttachmentBuilder } from "discord.js";
import { createBaseEmbed } from "@/lib/embeds";
import { resolveAssetUrl, isLocalAssetUrl } from "@shared/lib/assets";
import { join } from "path";
import { existsSync } from "fs";

export function getShopListingMessage(item: { id: number; name: string; description: string | null; formattedPrice: string; iconUrl: string | null; imageUrl: string | null; price: number | bigint }) {
    const files: AttachmentBuilder[] = [];
    let thumbnailUrl = resolveAssetUrl(item.iconUrl);
    let displayImageUrl = resolveAssetUrl(item.imageUrl);

    // Handle local icon
    if (item.iconUrl && isLocalAssetUrl(item.iconUrl)) {
        const iconPath = join(process.cwd(), "bot/assets/graphics", item.iconUrl.replace(/^\/?assets\//, ""));
        if (existsSync(iconPath)) {
            const iconName = defaultName(item.iconUrl);
            files.push(new AttachmentBuilder(iconPath, { name: iconName }));
            thumbnailUrl = `attachment://${iconName}`;
        }
    }

    // Handle local image (avoid duplicate attachments if same as icon)
    if (item.imageUrl && isLocalAssetUrl(item.imageUrl)) {
        // If image is same as icon, just use the same attachment reference
        if (item.imageUrl === item.iconUrl && thumbnailUrl?.startsWith("attachment://")) {
            displayImageUrl = thumbnailUrl;
        } else {
            const imagePath = join(process.cwd(), "bot/assets/graphics", item.imageUrl.replace(/^\/?assets\//, ""));
            if (existsSync(imagePath)) {
                const imageName = defaultName(item.imageUrl);
                // Check if we already attached this file (by name)
                if (!files.find(f => f.name === imageName)) {
                    files.push(new AttachmentBuilder(imagePath, { name: imageName }));
                }
                displayImageUrl = `attachment://${imageName}`;
            }
        }
    }

    const embed = createBaseEmbed(`Shop: ${item.name}`, item.description || "No description available.", "Green")
        .addFields({ name: "Price", value: item.formattedPrice, inline: true })
        .setThumbnail(thumbnailUrl)
        .setImage(displayImageUrl)
        .setFooter({ text: "Click the button below to purchase instantly." });

    const buyButton = new ButtonBuilder()
        .setCustomId(`shop_buy_${item.id}`)
        .setLabel(`Buy for ${item.price} 🪙`)
        .setStyle(ButtonStyle.Success)
        .setEmoji("🛒");

    const row = new ActionRowBuilder<ButtonBuilder>().addComponents(buyButton);

    return { embeds: [embed], components: [row], files };
}

function defaultName(path: string): string {
    return path.split("/").pop() || "image.png";
}