const Endpoints = {
  User: userID => {
    if (userID.id) userID = userID.id;
    const base = `/users/${userID}`;
    return {
      toString: () => base,
      channels: `${base}/channels`,
      profile: `${base}/profile`,
      relationships: `${base}/relationships`,
      settings: `${base}/settings`,
      Relationship: uID => `${base}/relationships/${uID}`,
      Guild: guildID => ({
        toString: () => `${base}/guilds/${guildID}`,
        settings: `${base}/guilds/${guildID}/settings`,
      }),
      Note: id => `${base}/notes/${id}`,
      Mentions: (limit, roles, everyone, guildID) =>
        `${base}/mentions?limit=${limit}&roles=${roles}&everyone=${everyone}${guildID ? `&guild_id=${guildID}` : ''}`,
      Avatar: (root, hash) => {
        if (userID === '1') return hash;
        return Endpoints.CDN(root).Avatar(userID, hash);
      },
    };
  },
  guilds: '/guilds',
  Guild: guildID => {
    if (guildID.id) guildID = guildID.id;
    const base = `/guilds/${guildID}`;
    return {
      toString: () => base,
      prune: `${base}/prune`,
      embed: `${base}/embed`,
      bans: `${base}/bans`,
      integrations: `${base}/integrations`,
      members: `${base}/members`,
      channels: `${base}/channels`,
      invites: `${base}/invites`,
      roles: `${base}/roles`,
      emojis: `${base}/emojis`,
      search: `${base}/messages/search`,
      voiceRegions: `${base}/regions`,
      webhooks: `${base}/webhooks`,
      ack: `${base}/ack`,
      settings: `${base}/settings`,
      auditLogs: `${base}/audit-logs`,
      Emoji: emojiID => `${base}/emojis/${emojiID}`,
      Icon: (root, hash) => Endpoints.CDN(root).Icon(guildID, hash),
      Splash: (root, hash) => Endpoints.CDN(root).Splash(guildID, hash),
      Role: roleID => `${base}/roles/${roleID}`,
      Member: memberID => {
        if (memberID.id) memberID = memberID.id;
        const mbase = `${base}/members/${memberID}`;
        return {
          toString: () => mbase,
          Role: roleID => `${mbase}/roles/${roleID}`,
          nickname: `${base}/members/@me/nick`,
        };
      },
    };
  },
  channels: '/channels',
  Channel: channelID => {
    if (channelID.id) channelID = channelID.id;
    const base = `/channels/${channelID}`;
    return {
      toString: () => base,
      messages: {
        toString: () => `${base}/messages`,
        bulkDelete: `${base}/messages/bulk-delete`,
      },
      invites: `${base}/invites`,
      typing: `${base}/typing`,
      permissions: `${base}/permissions`,
      webhooks: `${base}/webhooks`,
      search: `${base}/messages/search`,
      pins: `${base}/pins`,
      Icon: (root, hash) => Endpoints.CDN(root).GDMIcon(channelID, hash),
      Pin: messageID => `${base}/pins/${messageID}`,
      Recipient: recipientID => `${base}/recipients/${recipientID}`,
      Message: messageID => {
        if (messageID.id) messageID = messageID.id;
        const mbase = `${base}/messages/${messageID}`;
        return {
          toString: () => mbase,
          reactions: `${mbase}/reactions`,
          ack: `${mbase}/ack`,
          Reaction: emoji => {
            const rbase = `${mbase}/reactions/${emoji}`;
            return {
              toString: () => rbase,
              User: userID => `${rbase}/${userID}`,
            };
          },
        };
      },
    };
  },
  Message: (m, c) => Endpoints.Channel(c).Message(m),
  Member: (m, g) => Endpoints.Guild(g).Member(m),
  CDN(root) {
    return {
      Emoji: (emojiID, format = 'png') => `${root}/emojis/${emojiID}.${format}`,
      Asset: name => `${root}/assets/${name}`,
      Avatar: (userID, hash) => `${root}/avatars/${userID}/${hash}.${hash.startsWith('a_') ? 'gif' : 'png?size=2048'}`,
      Icon: (guildID, hash) => `${root}/icons/${guildID}/${hash}.jpg`,
      AppIcon: (clientID, hash) => `${root}/app-icons/${clientID}/${hash}.png`,
      AppAsset: (clientID, hash) => `${root}/app-assets/${clientID}/${hash}.png`,
      GDMIcon: (channelID, hash) => `${root}/channel-icons/${channelID}/${hash}.jpg?size=2048`,
      Splash: (guildID, hash) => `${root}/splashes/${guildID}/${hash}.jpg`,
    };
  },
  OAUTH2: {
    Application: appID => {
      const base = `/oauth2/applications/${appID}`;
      return {
        toString: () => base,
        resetSecret: `${base}/reset`,
        resetToken: `${base}/bot/reset`,
      };
    },
    App: appID => `/oauth2/authorize?client_id=${appID}`,
  },
  login: '/auth/login',
  logout: '/auth/logout',
  voiceRegions: '/voice/regions',
  gateway: {
    toString: () => '/gateway',
    bot: '/gateway/bot',
  },
  Invite: (inviteID, withCounts = true) => `/invite/${inviteID}?with_counts=${withCounts}`,
  inviteLink: id => `https://discord.gg/${id}`,
  Webhook: (webhookID, token) => `/webhooks/${webhookID}${token ? `/${token}` : ''}`,
};