import { APIEmbedField, Channel, EmbedBuilder, GuildTextBasedChannel, messageLink } from 'discord.js';
import { Database } from '../shared/Database';
import { Message } from '../events';
import { deserializeMessagePart, getModifiedAttachments, getModifiedStickers } from './message-utils';
import { LoggedMessage } from '../types';

export async function logEdit(loggedMessage: LoggedMessage, newMessage: Message<true>) {
  const settings = await Database.getGuildSettings(newMessage.guildId);

  if (!settings || !settings.event_logs_channel_id) return;

  const channel = await newMessage.guild.channels.fetch(settings.event_logs_channel_id);

  if (!channel || !channel.isSendable()) return;

  const fields: APIEmbedField[] = [];
  fields.push(...getMainEmbeds(loggedMessage, newMessage));
  fields.push(...getEditEmbeds(loggedMessage, newMessage));

  const embed = new EmbedBuilder()
    .setTitle('Edited Message')
    .setColor(0xFFFF00)
    .setTimestamp(newMessage.createdTimestamp)
    .addFields(...fields);

  channel.send({ embeds: [embed] });
}

export async function logDeletion(loggedMessage: LoggedMessage, deletedMessage: Message<true>) {
  const settings = await Database.getGuildSettings(deletedMessage.guildId);

  if (!settings || !settings.event_logs_channel_id) return;

  const channel = await deletedMessage.guild.channels.fetch(settings.event_logs_channel_id);

  if (!channel || !channel.isSendable()) return;

  const fields: APIEmbedField[] = [];
  fields.push(...getMainEmbeds(loggedMessage, deletedMessage));
  fields.push(...getDeletedEmbeds(loggedMessage));

  const embed = new EmbedBuilder()
    .setTitle('Deleted Message')
    .setColor(0xFF0000)
    .setTimestamp(deletedMessage.createdTimestamp)
    .addFields(...fields);

  channel.send({ embeds: [embed] });
}

function getMainEmbeds(loggedMessage: LoggedMessage, newMessage: Message<true>): APIEmbedField[] {
  const channelString = `${newMessage.channel.toString()}\n${newMessage.channel.name}`;
  const userString = `<@${loggedMessage.author_id}>\n${loggedMessage.author_name}`;

  return [
    {
      name: 'Channel',
      value: channelString,
      inline: true
    },
    {
      name: 'User',
      value: userString,
      inline: true
    },
    {
      name: 'Message',
      value: `[${newMessage.id}](${newMessage.url})`,
      inline: true
    },
  ];
}

function getDeletedEmbeds(loggedMessage: LoggedMessage): APIEmbedField[] {
  const fields: APIEmbedField[] = [];

  if (loggedMessage.content != '') {
    fields.push({
      name: 'Content',
      value: loggedMessage.content,
      inline: false
    });
  }

  for (const attachment of deserializeMessagePart(loggedMessage.attachments)) {
    fields.push({
      name: 'Attachment',
      value: attachment,
      inline: true
    });
  }

  for (const sticker of deserializeMessagePart(loggedMessage.stickers)) {
    fields.push({
      name: 'Stickers',
      value: sticker,
      inline: true
    });
  }

  return fields;
}

function getEditEmbeds(loggedMessage: LoggedMessage, newMessage: Message<true>): APIEmbedField[] {
  const fields: APIEmbedField[] = [];
  if (loggedMessage.content != newMessage.content) {
    fields.push(
      {
        name: 'Before',
        value: loggedMessage.content,
        inline: false
      },
      {
        name: 'After',
        value: newMessage.content,
        inline: false
      }
    );
  }

  const { addedAttachments, removedAttachments } = getModifiedAttachments(loggedMessage, newMessage);

  for (const removedAttachment of removedAttachments) {
    fields.push({
      name: 'Removed Attachment',
      value: removedAttachment,
      inline: true
    });
  }

  for (const addedAttachment of addedAttachments) {
    fields.push({
      name: 'Added Attachment',
      value: addedAttachment,
      inline: true
    });
  }

  const { addedStickers, removedStickers } = getModifiedStickers(loggedMessage, newMessage);

  for (const removedSticker of addedStickers) {
    fields.push({
      name: 'Removed Sticker',
      value: removedSticker,
      inline: true
    });
  }

  for (const addedSticker of removedStickers) {
    fields.push({
      name: 'Added Sticker',
      value: addedSticker,
      inline: true
    });
  }

  return fields;
}