export const DISCORD_ID = "1014549805608992901";

const LANYARD_API = `https://api.lanyard.rest/v1/users/${DISCORD_ID}`;

export type DiscordStatus = "online" | "idle" | "dnd" | "offline";

export interface LanyardEmoji {
    name: string;
    id?: string;
    animated?: boolean;
}

export interface LanyardActivityAssets {
    large_image?: string;
    large_text?: string;
    small_image?: string;
    small_text?: string;
}

export interface LanyardActivity {
    id: string;
    name: string;
    type: number;
    state?: string | null;
    details?: string | null;
    emoji?: LanyardEmoji | null;
    timestamps?: { start?: number; end?: number } | null;
    application_id?: string | null;
    assets?: LanyardActivityAssets | null;
}

export function activityImageUrl(activity: LanyardActivity, small: boolean): string | null {
    const key = small ? activity.assets?.small_image : activity.assets?.large_image;
    if (!key) {
        return null;
    }
    if (key.startsWith("mp:")) {
        return `https://media.discordapp.net/external/${key.slice(3)}`;
    }
    if (key.startsWith("spotify:")) {
        return `https://i.scdn.co/image/${key.slice("spotify:".length)}`;
    }
    if (activity.application_id) {
        return `https://cdn.discordapp.com/app-assets/${activity.application_id}/${key}.png`;
    }
    return null;
}

export interface LanyardSpotify {
    track_id: string;
    song: string;
    artist: string;
    album: string;
    album_art_url: string | null;
}

export interface LanyardData {
    discord_user: {
        id: string;
        username: string;
        global_name: string | null;
        display_name: string | null;
        discriminator: string;
        avatar: string | null;
        bot: boolean;
    };
    activities: LanyardActivity[];
    discord_status: DiscordStatus;
    active_on_discord_desktop: boolean;
    active_on_discord_mobile: boolean;
    active_on_discord_web: boolean;
    listening_to_spotify: boolean;
    spotify: LanyardSpotify | null;
}

interface LanyardResponse {
    success: boolean;
    data: LanyardData;
}

export async function getLanyard(): Promise<LanyardData | null> {
    try {
        const response = await fetch(LANYARD_API, { next: { revalidate: 10 } });
        if (!response.ok) {
            return null;
        }
        const json = (await response.json()) as LanyardResponse;
        return json.success ? json.data : null;
    } catch {
        return null;
    }
}

export function lanyardUrl(): string {
    return LANYARD_API;
}

export function discordAvatarUrl(userId: string, avatarHash: string | null, size = 128): string {
    if (!avatarHash) {
        return `https://cdn.discordapp.com/embed/avatars/0.png?size=${size}`;
    }
    const extension = avatarHash.startsWith("a_") ? "gif" : "png";
    return `https://cdn.discordapp.com/avatars/${userId}/${avatarHash}.${extension}?size=${size}`;
}

export function discordProfileUrl(userId: string): string {
    return `https://discord.com/users/${userId}`;
}