import { ApplicationIntegrationType, AutocompleteInteraction, ChatInputCommandInteraction, Client, InteractionContextType, MessageFlags, PermissionFlagsBits, SlashCommandBuilder, User } from 'discord.js';
import { Database } from '../shared/Database';
import { getE621User, logCustomEvent } from '../utils';
import { config } from '../config';
import { TicketPhrase } from '../types';

const MIN_PHRASE_LENGTH = 1;
const MAX_PHRASE_LENGTH = 512;

type SubcommandGroup = 'admin' | 'personal';
type Subcommand = 'add' | 'remove' | 'list' | 'dump' | 'purge';

export default {
  name: 'phrases',
  data: new SlashCommandBuilder()
    .setName('phrases')
    .setDescription('Manage notified phrases.')
    .setIntegrationTypes(ApplicationIntegrationType.GuildInstall)
    .setContexts(InteractionContextType.Guild)
    .setDefaultMemberPermissions(PermissionFlagsBits.BanMembers)
    .addSubcommandGroup(subcommandGroup =>
      subcommandGroup
        .setName('admin')
        .setDescription('Manage admin notified phrases.')
        .addSubcommand(subcommand =>
          subcommand
            .setName('add')
            .setDescription('Add an admin notification phrase.')
            .addStringOption(option =>
              option
                .setName('phrase')
                .setDescription('The phrase to add.')
                .setRequired(true)
                .setMinLength(MIN_PHRASE_LENGTH)
                .setMaxLength(MAX_PHRASE_LENGTH)
            )
        )
        .addSubcommand(subcommand =>
          subcommand
            .setName('remove')
            .setDescription('Remove an admin notification phrase.')
            .addNumberOption(option =>
              option
                .setName('phrase')
                .setDescription('The phrase to remove.')
                .setRequired(true)
                .setAutocomplete(true)
            )
        )
        .addSubcommand(subcommand =>
          subcommand
            .setName('list')
            .setDescription('Get a list of the current admin notification phrases.')
        )
    )
    .addSubcommandGroup(subcommandGroup =>
      subcommandGroup
        .setName('personal')
        .setDescription('Manage personal notified phrases.')
        .addSubcommand(subcommand =>
          subcommand
            .setName('add')
            .setDescription('Add a personal notification phrase.')
            .addStringOption(option =>
              option
                .setName('phrase')
                .setDescription('The phrase to add.')
                .setRequired(true)
                .setMinLength(MIN_PHRASE_LENGTH)
                .setMaxLength(MAX_PHRASE_LENGTH)
            )
        )
        .addSubcommand(subcommand =>
          subcommand
            .setName('remove')
            .setDescription('Remove a personal notification phrase.')
            .addNumberOption(option =>
              option
                .setName('phrase')
                .setDescription('The phrase to remove.')
                .setRequired(true)
                .setAutocomplete(true)
            )
        )
        .addSubcommand(subcommand =>
          subcommand
            .setName('list')
            .setDescription('Get a list of the current personal notification phrases.')
        )
    )
    .addSubcommand(subcommand =>
      subcommand
        .setName('dump')
        .setDescription('List all notification phrases.')
    )
    .addSubcommand(subcommand =>
      subcommand
        .setName('purge')
        .setDescription("Purge a user's phrases.")
        .addUserOption(option =>
          option
            .setName('user')
            .setDescription('The user to purge the phrases of.')
            .setRequired(true)
        )
    ),
  handler: async function (client: Client, interaction: ChatInputCommandInteraction) {
    const subcommandGroup: SubcommandGroup | null = interaction.options.getSubcommandGroup() as SubcommandGroup;
    const subcommand: Subcommand | null = interaction.options.getSubcommand() as Subcommand;

    switch (subcommand) {
      case 'add':
        return addPhrase(interaction, interaction.options.getString('phrase', true), subcommandGroup!);
      case 'remove':
        return removePhrase(interaction, interaction.options.getNumber('phrase', true), subcommandGroup!);
      case 'list':
        return listPhrases(interaction, subcommandGroup!);
      case 'dump':
        return dumpPhrases(interaction);
      case 'purge':
        return purgePhrases(interaction, interaction.options.getUser('user', true));
    }
  },
  autoComplete: async function (client: Client, interaction: AutocompleteInteraction) {
    const subcommandGroup: SubcommandGroup | null = interaction.options.getSubcommandGroup() as SubcommandGroup;

    if (!subcommandGroup) return interaction.respond([]);

    const value = interaction.options.getFocused();

    const phrases: TicketPhrase[] = await Database.getTicketPhrasesFor(subcommandGroup == 'admin' ? 'admin' : interaction.user.id);

    const toRespond = phrases.filter(p => !value ? true : p.phrase.includes(value));
    if (toRespond.length > 25) toRespond.length = 25;

    interaction.respond(toRespond.map(p => ({
      name: p.phrase,
      value: p.id
    })));
  }
};

async function purgePhrases(interaction: ChatInputCommandInteraction, user: User) {
  const phrases: TicketPhrase[] = await Database.getTicketPhrasesFor(user.id);

  const count = await Database.removeAllTicketPhrasesFor(user.id);

  logCustomEvent(interaction.guild!, {
    title: 'Ticket Phrases Purged',
    description: null,
    color: 0xFF0000,
    timestamp: new Date(),
    fields: [
      {
        name: 'User',
        value: `<@${interaction.user.id}>\n${interaction.user.username}`,
        inline: true
      },
      {
        name: 'Target User',
        value: `<@${user.id}>\n${user.username}`,
        inline: true
      },
      {
        name: 'Count',
        value: count.toString(),
        inline: true
      }
    ]
  });

  interaction.reply(`Purged the following phrases (${count}):\n${phrases.map(p => `- \`${p.phrase}\``).join('\n')}`);
}

async function dumpPhrases(interaction: ChatInputCommandInteraction) {
  let content = '';

  const guildSettings = await Database.getGuildSettings(interaction.guildId!);

  await Database.getAllTicketPhrases((phrase: TicketPhrase) => {
    if (phrase.user_id == 'admin' && (!guildSettings || !guildSettings.admin_role_id)) return;

    const mention = phrase.user_id == 'admin' ? `<@&${guildSettings?.admin_role_id}>` : `<@${phrase.user_id}>`;

    content += `${mention}: \`${phrase.phrase}\`\n`;
  });

  if (content.length == 0) return interaction.reply('No phrases found.');

  interaction.reply('The following phrases are registered:\n\n' + content);
}

async function addPhrase(interaction: ChatInputCommandInteraction, phrase: string, group: SubcommandGroup) {
  await Database.putTicketPhrase(group == 'admin' ? 'admin' : interaction.user.id, phrase);

  logCustomEvent(interaction.guild!, {
    title: `${group == 'admin' ? 'Admin ' : ''}Ticket Phrase Added`,
    description: null,
    color: 0x00FF00,
    timestamp: new Date(),
    fields: [
      {
        name: 'User',
        value: `<@${interaction.user.id}>\n${interaction.user.username}`,
        inline: true
      },
      {
        name: 'Phrase',
        value: phrase,
        inline: true
      }
    ]
  });

  interaction.reply(`Phrases matching "${phrase}" will now alert ${group == 'admin' ? 'admins' : 'you'}.`);
}

async function removePhrase(interaction: ChatInputCommandInteraction, phraseId: number, group: SubcommandGroup) {
  const phrase = await Database.getTicketPhrase(phraseId);

  if (!phrase) return interaction.reply('Phrase not found');

  await Database.removeTicketPhrase(phraseId);

  logCustomEvent(interaction.guild!, {
    title: `${group == 'admin' ? 'Admin ' : ''}Ticket Phrase Removed`,
    description: null,
    color: 0xFF0000,
    timestamp: new Date(),
    fields: [
      {
        name: 'User',
        value: `<@${interaction.user.id}>\n${interaction.user.username}`,
        inline: true
      },
      {
        name: 'Phrase',
        value: phrase.phrase,
        inline: true
      }
    ]
  });

  interaction.reply(`Phrase will no longer alert ${group == 'admin' ? 'admins' : 'you'}.`);
}

async function listPhrases(interaction: ChatInputCommandInteraction, group: SubcommandGroup) {
  const phrases = await Database.getTicketPhrasesFor(group == 'admin' ? 'admin' : interaction.user.id);

  if (phrases.length == 0) return interaction.reply('No phrases registered');

  interaction.reply(`The following phrases are registered:\n\n${phrases.map(p => (`- \`${p.phrase}\``)).join('\n')}`);
}