const Command = require("../lib/command.js");
const CATEGORY = "utility";

const ICON_BASE = "https://cdn.discordapp.com/icons/";
const AVATAR_BASE = "https://cdn.discordapp.com/avatars/";
const SPLASH_BASE = "https://cdn.discordapp.com/splashes/";
const BANNER_BASE = "https://cdn.discordapp.com/banners/";
const EMOTE_BASE = "https://cdn.discordapp.com/emojis/";

const STATUS_ICONS = {
  online: "<:online:493173082421461002>",
  idle: "<:idle:493173082006093836>",
  dnd: "<:dnd:493173082261815307>",
  offline: "<:offline:493173082253426688>",
};

const EMOJI_SETS = {
  blobs: {
    prefix:
      "https://cdn.jsdelivr.net/gh/googlefonts/noto-emoji@e456654119cc3a5f9bebb7bbd00512456f983d2d/svg/emoji_u",
    sep: "_",
    suffix: ".svg",
  },
  noto: {
    prefix: "gitcdn.xyz/repo/googlefonts/noto-emoji/master/svg/emoji_u",
    sep: "_",
    suffix: ".svg",
  },
  twemoji: {
    prefix: "https://twemoji.maxcdn.com/v/latest/svg/",
    sep: "-",
    suffix: ".svg",
  },
  mustd: {
    prefix:
      "https://cdn.jsdelivr.net/gh/Mstrodl/mutant-standard-mirror@0435227d9d8c0d6a346c8ae4c12b08a5cdc37041/emoji/",
    sep: "-",
    suffix: ".svg",
  },
  apple: {
    prefix: "https://intrnl.github.io/assetsEmoji/AppleColor/emoji_u",
    sep: "_",
    suffix: ".png",
  },
  facebook: {
    prefix: "https://intrnl.github.io/assetsEmoji/facebook/emoji_u",
    sep: "_",
    suffix: ".png",
  },
};
EMOJI_SETS["noto-old"] = EMOJI_SETS.blobs;
EMOJI_SETS.mutant = EMOJI_SETS.mustd;
EMOJI_SETS.mutstd = EMOJI_SETS.mustd;
EMOJI_SETS.ms = EMOJI_SETS.mustd;
EMOJI_SETS.twitter = EMOJI_SETS.twemoji;
EMOJI_SETS.fb = EMOJI_SETS.facebook;

const CUSTOM_EMOTE_REGEX = /<(?:\u200b|&)?(a)?:(\w+):(\d+)>/;

const fetch = require("node-fetch");
const sharp = require("sharp");

const {lookupUser} = require("../lib/utils.js");
const {getNamesFromString} = require("../lib/unicode.js");

const avatar = new Command("avatar");
avatar.category = CATEGORY;
avatar.helpText = "Get avatar of a user";
avatar.usage = "<user>";
avatar.callback = async function (msg, line) {
  if (line == "--server" || line == "--guild") {
    if (!msg.guildID) {
      return "`--server/--guild` can only be used within guilds.";
    } else {
      const guild = msg.channel.guild || hf.bot.guilds.get(msg.guildID);
      const url = `${ICON_BASE}${guild.id}/${guild.icon}.${
        guild.icon.startsWith("a_") ? "gif?size=1024&_=.gif" : "png?size=1024"
      }`;
      return {
        embeds: [
          {
            title: "Server Icon",
            url,
            image: {
              url,
            },
          },
        ],
      };
    }
  } else if (line) {
    const user = await lookupUser(msg, line);
    if (
      user == "No results" ||
      user == "Canceled" ||
      user == "Request timed out"
    ) {
      return user;
    } else {
      let member = user;
      const guild = msg.channel.guild || hf.bot.guilds.get(msg.guildID);
      if (guild) {
        if (guild.members.has(user.id)) {
          member = guild.members.get(user.id);
        } else {
          const fetched = await guild.fetchMembers({
            userIDs: [user.id],
          });
          member = fetched[0];
        }
      }
      const avatar = member.avatar || member.user.avatar;
      const url =
        guild && member.avatar
          ? `https://cdn.discordapp.com/guilds/${guild.id}/users/${
              member.id
            }/avatars/${member.avatar}.${
              member.avatar.startsWith("a_")
                ? "gif?size=1024&_=.gif"
                : "png?size=1024"
            }`
          : `${AVATAR_BASE}${member.id}/${avatar}.${
              avatar.startsWith("a_") ? "gif?size=1024&_=.gif" : "png?size=1024"
            }`;
      return {
        embeds: [
          {
            title: `Avatar for \`${member.username}#${member.discriminator}\``,
            url,
            image: {
              url,
            },
          },
        ],
      };
    }
  } else {
    const guild = msg.channel.guild || hf.bot.guilds.get(msg.guildID);
    const avatar = msg.member.avatar || msg.author.avatar;
    const url = msg.member.avatar
      ? `https://cdn.discordapp.com/guilds/${guild.id}/users/${
          msg.member.id
        }/avatars/${msg.member.avatar}.${
          msg.member.avatar.startsWith("a_")
            ? "gif?size=1024&_=.gif"
            : "png?size=1024"
        }`
      : `${AVATAR_BASE}${msg.author.id}/${avatar}.${
          avatar.startsWith("a_") ? "gif?size=1024&_=.gif" : "png?size=1024"
        }`;
    return {
      embeds: [
        {
          title: `Avatar for \`${msg.author.username}#${msg.author.discriminator}\``,
          url,
          image: {
            url,
          },
        },
      ],
    };
  }
};
hf.registerCommand(avatar);

const banner = new Command("banner");
banner.category = CATEGORY;
banner.helpText = "Get banner of a user";
banner.usage = "<user>";
banner.callback = async function (msg, line) {
  let id = msg.author.id;

  if (line == "--server" || line == "--guild") {
    if (!msg.guildID) {
      return "`--server/--guild` can only be used within guilds.";
    } else {
      const guild = msg.channel.guild || hf.bot.guilds.get(msg.guildID);

      if (!guild.banner) return "This guild does not have a banner.";

      const url = `${BANNER_BASE}${guild.id}/${guild.banner}.${
        guild.banner.startsWith("a_") ? "gif?size=1024&_=.gif" : "png?size=1024"
      }`;
      return {
        embeds: [
          {
            title: "Server Banner",
            url,
            image: {
              url,
            },
          },
        ],
      };
    }
  } else if (line) {
    const lookup = await lookupUser(msg, line);
    if (
      lookup == "No results" ||
      lookup == "Canceled" ||
      lookup == "Request timed out"
    ) {
      return lookup;
    } else {
      id = lookup.id;
    }
  }

  const user = await hf.bot.requestHandler.request("GET", "/users/" + id, true);

  if (!user.banner) return "This user does not have a banner.";

  const url = `${BANNER_BASE}${user.id}/${user.banner}.${
    user.banner.startsWith("a_") ? "gif?size=1024&_=.gif" : "png?size=1024"
  }`;
  return {
    embeds: [
      {
        title: `Banner for \`${user.username}#${user.discriminator}\``,
        url,
        image: {
          url,
        },
      },
    ],
  };
};
hf.registerCommand(banner);

const lookupinvite = new Command("lookupinvite");
lookupinvite.category = CATEGORY;
lookupinvite.helpText = "Lookup an invite";
lookupinvite.usage = "<invite code>";
lookupinvite.addAlias("linvite");
lookupinvite.callback = async function (msg, line) {
  if (!line) {
    return "No arguments passed.";
  }

  line = line.replace(/(https?:\/\/)?discord\.gg\//, "");

  const invite = await hf.bot.requestHandler.request(
    "GET",
    "/invites/" + line + "?with_counts=1"
  );
  if (!invite) return ":warning: No data returned.";

  if (invite.message) {
    if (invite.message == "Unknown Invite") {
      return "Invite provided is not valid.";
    } else {
      return `:warning: Got error \`${invite.code}: "${invite.message}"\``;
    }
  } else {
    const embed = {
      title: `Invite Info: \`${invite.code}\``,
      description: invite.description,
      fields: [
        {
          name: "Guild",
          value: `**${invite.guild.name}** (${invite.guild.id})`,
          inline: true,
        },
        {
          name: "Channel",
          value: `**${invite.channel.name}** (${invite.channel.id})`,
          inline: true,
        },
        {
          name: "Member Count",
          value: `${STATUS_ICONS.online}${invite.approximate_presence_count} online\t\t${STATUS_ICONS.offline}${invite.approximate_member_count} members`,
          inline: false,
        },
        {
          name: "Features",
          value:
            invite.guild.features.length > 0
              ? invite.guild.features
                  .map((feature) =>
                    feature
                      .split("_")
                      .map((x) => x[0] + x.substring(1).toLowerCase())
                      .join(" ")
                  )
                  .join(", ")
              : "None",
          inline: false,
        },
      ],
      thumbnail: {
        url:
          invite.guild.icon &&
          `${ICON_BASE}${invite.guild.id}/${invite.guild.icon}.${
            invite.guild.icon.startsWith("a_")
              ? "gif?size=1024&_=.gif"
              : "png?size=1024"
          }`,
      },
    };

    if (invite.inviter) {
      embed.fields.push({
        name: "Inviter",
        value: `**${invite.inviter.username}#${invite.inviter.discriminator}** (${invite.inviter.id})`,
        inline: true,
      });
    }

    if (invite.guild.icon || invite.guild.splash || invite.guild.banner) {
      embed.fields.push({
        name: "\u200b",
        value: `${
          invite.guild.icon
            ? `[Icon](${ICON_BASE}${invite.guild.id}/${invite.guild.icon}.${
                invite.guild.icon.startsWith("a_")
                  ? "gif?size=1024"
                  : "png?size=1024"
              })`
            : ""
        }${
          invite.guild.splash
            ? `${invite.guild.icon ? " | " : ""}[Splash](${SPLASH_BASE}${
                invite.guild.id
              }/${invite.guild.splash}.png?size=2048)`
            : ""
        }${
          invite.guild.banner
            ? `${
                invite.guild.icon || invite.guild.splash ? " | " : ""
              }[Banner](${BANNER_BASE}${invite.guild.id}/${
                invite.guild.banner
              }.png?size=2048)`
            : ""
        }`,
        inline: false,
      });
    }

    if (invite.guild.splash) {
      embed.image = {
        url: `${SPLASH_BASE}${invite.guild.id}/${invite.guild.splash}.png?size=256`,
      };
    }

    return {embed};
  }
};
hf.registerCommand(lookupinvite);

const snowflake = new Command("snowflake");
snowflake.category = CATEGORY;
snowflake.helpText = "Converts a snowflake ID into readable time.";
snowflake.usage = "<--twitter> [snowflake]";
snowflake.callback = function (msg, line) {
  let twitter = false;
  if (line.startsWith("--twitter")) {
    twitter = true;
    line.replace("--twitter ", "");
  }
  const num = parseInt(line);
  if (!isNaN(num)) {
    let binary = num.toString(2);
    binary = "0".repeat(64 - binary.length) + binary;
    const timestamp =
      parseInt(binary.substr(0, 42), 2) +
      (twitter ? 1288834974657 : 1420070400000);

    return `The timestamp for \`${line}\` is ${new Date(
      timestamp
    ).toUTCString()}`;
  } else {
    return "Argument provided is not a number.";
  }
};
hf.registerCommand(snowflake);

const USER_FLAGS = [
  "STAFF",
  "PARTNER",
  "HYPESQUAD",
  "BUG_HUNTER_LEVEL_1",
  "MFA_SMS",
  "PREMIUM_PROMO_DISMISSED",
  "HYPESQUAD_ONLINE_HOUSE_1",
  "HYPESQUAD_ONLINE_HOUSE_2",
  "HYPESQUAD_ONLINE_HOUSE_3",
  "PREMIUM_EARLY_SUPPORTER",
  "TEAM_PSEUDO_USER",
  "<Internal Application (Partner, etc) Flag>",
  "SYSTEM",
  "HAS_UNREAD_URGENT_MESSAGES",
  "BUG_HUNTER_LEVEL_2",
  "UNDERAGE_DELETED",
  "VERIFIED_BOT",
  "VERIFIED_DEVELOPER",
  "CERTIFIED_MODERATOR",
  "BOT_HTTP_INTERACTIONS",
  "SPAMMER",
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  undefined,
  "<Verified Phone Number (speculative)>",
];

function flagFromInt(int) {
  const bits = int.toString(2);
  const splitBits = bits.split("").reverse();

  const reassignedBits = {};

  for (const shift in splitBits) {
    reassignedBits[shift] = splitBits[shift];
  }

  const flags = Object.keys(reassignedBits).filter(
    (bit) => reassignedBits[bit] == 1
  );

  let out = "";

  for (const flag of flags) {
    out +=
      (USER_FLAGS[flag] || "<Undocumented Flag>") +
      ` (1 << ${flag}, ${1n << BigInt(flag)})\n`;
  }

  return out;
}

const flagdump = new Command("flagdump");
flagdump.category = CATEGORY;
flagdump.helpText = "Dumps Discord user flags.";
flagdump.usage = "[flags or user mention]";
flagdump.callback = async function (msg, line) {
  const num = parseInt(line);
  if (/<@!?([0-9]*)>/.test(line)) {
    const id = line.match(/<@?!([0-9]*)>/)[1];
    const guild = msg.channel.guild || hf.bot.guilds.get(msg.guildID);
    let user = guild && (await guild.fetchMembers({userIDs: [id]}));
    if (!user || !user[0]) {
      user = hf.bot.users.get(id);
    } else {
      user = user[0].user;
    }

    if (!user) {
      return "User not cached.";
    } else {
      return `\`${user.username}#${
        user.discriminator
      }\`'s public flags:\n\`\`\`${flagFromInt(user.publicFlags)}\`\`\``;
    }
  } else if (!isNaN(num)) {
    return `\`\`\`\n${flagFromInt(num)}\`\`\``;
  } else {
    return `\`${msg.author.username}#${
      msg.author.discriminator
    }\`'s public flags:\n\`\`\`${flagFromInt(msg.author.publicFlags)}\`\`\``;
  }
};
hf.registerCommand(flagdump);

const emojiNames = [];
fetch("https://unpkg.com/emoji.json/emoji.json")
  .then((res) => res.json())
  .then((body) =>
    body.map(
      (emoji) => (emojiNames[emoji.char] = emoji.name.replace(/ /g, "_"))
    )
  );

const jumbo = new Command("jumbo");
jumbo.category = CATEGORY;
jumbo.helpText = "Gets the raw image of an emoji.";
jumbo.usage = "<emoji>";
jumbo.addAlias("e");
jumbo.addAlias("emote");
jumbo.addAlias("emoji");
jumbo.callback = async function (msg, line) {
  if (CUSTOM_EMOTE_REGEX.test(line)) {
    const [_, animatedFlag, name, id] = line.match(CUSTOM_EMOTE_REGEX);
    const animated = animatedFlag === "a";

    return {
      embeds: [
        {
          title: `:${name}: - \`${id}\``,
          url: `${EMOTE_BASE}${id}.${animated ? "gif" : "png"}?v=1`,
          image: {
            url: `${EMOTE_BASE}${id}.${animated ? "gif" : "png"}?v=1`,
          },
        },
      ],
    };
  } else {
    let setName = "twemoji";
    for (const set in EMOJI_SETS) {
      if (line.startsWith(`--${set} `)) {
        setName = set;
        line = line.replace(`--${set} `, "");
      }
    }

    const set = EMOJI_SETS[setName];

    const emoji = Array.from(line)
      .map((char) => char.codePointAt().toString(16))
      .join(set.sep);
    const url = set.prefix + emoji + set.suffix;

    const name = emojiNames[line]
      ? `\\:${emojiNames[line]}\\:`
      : getNamesFromString(line)[0][1];

    const statusCode = await fetch(url, {method: "HEAD"}).then(
      (res) => res.status
    );

    if (statusCode !== 200) {
      return "Emoji not found. The emoji set chosen might not have this emote as an image.";
    }

    if (set.suffix == ".svg") {
      const svg = await fetch(url).then((res) => res.buffer());
      const converted = await sharp(svg, {density: 2400})
        .resize(1024)
        .toBuffer();

      return {
        embeds: [
          {
            title: `${name} (${emoji.toUpperCase().replace(/[-_]/g, ", ")})`,
            url,
            image: {
              url: "attachment://emoji.png",
            },
          },
        ],
        file: {
          file: converted,
          name: "emoji.png",
        },
      };
    } else {
      return {
        embeds: [
          {
            title: `${name} (${emoji.toUpperCase().replace(/[-_]/g, ", ")})`,
            url,
            image: {
              url,
            },
          },
        ],
      };
    }
  }
};
hf.registerCommand(jumbo);