import { EmbedBuilder, AttachmentBuilder } from "discord.js";
import type { ItemUsageData } from "@shared/lib/types";
import { EffectType } from "@shared/lib/constants";
import { resolveAssetUrl, isLocalAssetUrl } from "@shared/lib/assets";
import { join } from "path";
import { existsSync } from "fs";

/**
 * Inventory entry with item details
 */
interface InventoryEntry {
    quantity: bigint | null;
    item: {
        id: number;
        name: string;
        [key: string]: any;
    };
}

/**
 * Creates an embed displaying a user's inventory
 */
export function getInventoryEmbed(items: InventoryEntry[], username: string): EmbedBuilder {
    const description = items.map(entry => {
        return `**${entry.item.name}** x${entry.quantity}`;
    }).join("\n");

    return new EmbedBuilder()
        .setTitle(`📦 ${username}'s Inventory`)
        .setDescription(description)
        .setColor(0x3498db); // Blue
}

/**
 * Creates an embed showing the results of using an item
 */
export function getItemUseResultEmbed(results: any[], item?: { name: string, iconUrl: string | null, usageData: any }): { embed: EmbedBuilder, files: AttachmentBuilder[] } {
    const embed = new EmbedBuilder();
    const files: AttachmentBuilder[] = [];
    const otherMessages: string[] = [];
    let lootResult: any = null;

    for (const res of results) {
        if (typeof res === 'object' && res.type === 'LOOTBOX_RESULT') {
            lootResult = res;
        } else {
            otherMessages.push(typeof res === 'string' ? `• ${res}` : `• ${JSON.stringify(res)}`);
        }
    }

    // Default Configuration
    const isLootbox = item?.usageData?.effects?.some((e: any) => e.type === EffectType.LOOTBOX);
    embed.setColor(isLootbox ? 0xFFD700 : 0x2ecc71); // Gold for lootbox, Green otherwise by default
    embed.setTimestamp();

    if (lootResult) {
        embed.setTitle(`🎁 ${item?.name || "Lootbox"} Opened!`);

        if (lootResult.rewardType === 'ITEM' && lootResult.item) {
            const i = lootResult.item;
            const amountStr = lootResult.amount > 1 ? `x${lootResult.amount}` : '';

            // Rarity Colors
            const rarityColors: Record<string, number> = {
                'C': 0x95A5A6,  // Gray
                'R': 0x3498DB,  // Blue
                'SR': 0x9B59B6, // Purple
                'SSR': 0xF1C40F // Gold
            };

            const rarityKey = i.rarity || 'C';
            if (rarityKey in rarityColors) {
                embed.setColor(rarityColors[rarityKey] ?? 0x95A5A6);
            } else {
                embed.setColor(0x95A5A6);
            }

            if (i.image) {
                if (isLocalAssetUrl(i.image)) {
                    const imagePath = join(process.cwd(), "bot/assets/graphics", i.image.replace(/^\/?assets\//, ""));
                    if (existsSync(imagePath)) {
                        const imageName = defaultName(i.image);
                        if (!files.find(f => f.name === imageName)) {
                            files.push(new AttachmentBuilder(imagePath, { name: imageName }));
                        }
                        embed.setImage(`attachment://${imageName}`);
                    }
                } else {
                    const imgUrl = resolveAssetUrl(i.image);
                    if (imgUrl) embed.setImage(imgUrl);
                }
            }

            embed.setDescription(`**You found ${i.name} ${amountStr}!**\n${i.description || '_'}`);
            embed.addFields({ name: 'Rarity', value: rarityKey, inline: true });

        } else if (lootResult.rewardType === 'CURRENCY') {
            embed.setColor(0xF1C40F);
            embed.setDescription(`**You found ${lootResult.amount.toLocaleString()} 🪙 AU!**`);
        } else if (lootResult.rewardType === 'XP') {
            embed.setColor(0x2ECC71); // Green
            embed.setDescription(`**You gained ${lootResult.amount.toLocaleString()} XP!**`);
        } else {
            // Nothing or Message
            embed.setDescription(lootResult.message);
            embed.setColor(0x95A5A6); // Gray
        }

    } else {
        // Standard item usage
        embed.setTitle(item ? `✅ Used ${item.name}` : "✅ Item Used!");
        embed.setDescription(otherMessages.join("\n") || "Effect applied.");

        if (isLootbox && item && item.iconUrl) {
            if (isLocalAssetUrl(item.iconUrl)) {
                const iconPath = join(process.cwd(), "bot/assets/graphics", item.iconUrl.replace(/^\/?assets\//, ""));
                if (existsSync(iconPath)) {
                    const iconName = defaultName(item.iconUrl);
                    if (!files.find(f => f.name === iconName)) {
                        files.push(new AttachmentBuilder(iconPath, { name: iconName }));
                    }
                    embed.setThumbnail(`attachment://${iconName}`);
                }
            } else {
                const resolvedIconUrl = resolveAssetUrl(item.iconUrl);
                if (resolvedIconUrl) embed.setThumbnail(resolvedIconUrl);
            }
        }
    }

    if (otherMessages.length > 0 && lootResult) {
        embed.addFields({ name: "Other Effects", value: otherMessages.join("\n") });
    }

    return { embed, files };
}

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