import { AllowedMentions, BushCommand, type ArgType, type BushMessage, type BushSlashMessage, type OptionalArgType } from '#lib';
import assert from 'assert';
import { ApplicationCommandOptionType, PermissionFlagsBits } from 'discord.js';

export default class LevelRolesCommand extends BushCommand {
	public constructor() {
		super('levelRole', {
			aliases: ['level-role', 'level-roles', 'lr'],
			category: 'config',
			description: 'Configure roles to be assigned to users upon reaching certain levels.',
			note: 'Omit the role to remove the role. View configured roles with `-config levelRoles`.',
			usage: ['level-role <level> [role]'],
			examples: ['level-role 100 @Super Cool Role'],
			args: [
				{
					id: 'level',
					type: 'integer',
					description: 'The level to assign the role when reached.',
					prompt: 'What level would you like to set a role for when reached?',
					retry: '{error} Pick a valid integer representing the role to assign a role to when reached.',
					slashType: ApplicationCommandOptionType.Integer
				},
				{
					id: 'role',
					type: 'role',
					match: 'rest',
					description: 'The role to assign to a user who reaches the specified level.',
					prompt: 'What role would you like to assign to users when they reach that level?',
					retry: '{error} Choose a valid role to assign to users upon reaching the specified level.',
					slashType: ApplicationCommandOptionType.Role,
					optional: true
				}
			],
			slash: true,
			channel: 'guild',
			clientPermissions: (m) => util.clientSendAndPermCheck(m, [PermissionFlagsBits.ManageRoles]),
			userPermissions: [PermissionFlagsBits.ManageGuild, PermissionFlagsBits.ManageRoles]
		});
	}

	public override async exec(
		message: BushMessage | BushSlashMessage,
		args: { level: ArgType<'integer'>; role: OptionalArgType<'role'> }
	) {
		assert(message.inGuild());
		assert(message.member);

		if (!(await message.guild.hasFeature('leveling'))) {
			return await message.util.reply(
				`${util.emojis.error} This command can only be run in servers with the leveling feature enabled.`
			);
		}

		if (args.level < 1) return await message.util.reply(`${util.emojis.error} You cannot set a level role less that 1.`);

		if (args.role) {
			if (args.role.managed)
				return await message.util.reply({
					content: `${util.emojis.error} You cannot set <@${args.role.id}> as a level role since it is managed.`,
					allowedMentions: AllowedMentions.none()
				});
			else if (args.role.id === message.guild.id)
				return await message.util.reply({
					content: `${util.emojis.error} You cannot set the @everyone role as a level role.`,
					allowedMentions: AllowedMentions.none()
				});
			else if (args.role.comparePositionTo(message.member.roles.highest) >= 0)
				return await message.util.reply({
					content: `${util.emojis.error} <@${args.role.id}> is higher or equal to your highest role.`,
					allowedMentions: AllowedMentions.none()
				});
			else if (args.role.comparePositionTo(message.guild.me!.roles.highest) >= 0)
				return await message.util.reply({
					content: `${util.emojis.error} <@${args.role.id}> is higher or equal to my highest role.`,
					allowedMentions: AllowedMentions.none()
				});
		}

		const oldRoles = Object.freeze(await message.guild.getSetting('levelRoles'));
		const newRoles = { ...oldRoles };

		if (args.role) {
			newRoles[args.level] = args.role.id;
		} else {
			delete newRoles[args.level];
		}
		Object.freeze(newRoles);

		const success = await message.guild.setSetting('levelRoles', newRoles).catch(() => false);

		if (!success) return await message.util.reply(`${util.emojis.error} An error occurred while setting the level roles.`);

		if (!oldRoles[args.level] && newRoles[args.level]) {
			return await message.util.reply({
				content: `${util.emojis.success} The level role for **${args.level}** is now <@&${newRoles[args.level]}>.`,
				allowedMentions: AllowedMentions.none()
			});
		} else if (oldRoles[args.level] && !newRoles[args.level]) {
			return await message.util.reply({
				content: `${util.emojis.success} The level role for **${args.level}** was <@&${
					oldRoles[args.level]
				}> but is now disabled.`,
				allowedMentions: AllowedMentions.none()
			});
		} else if (oldRoles[args.level] && newRoles[args.level]) {
			return await message.util.reply({
				content: `${util.emojis.success} The level role for **${args.level}** has been updated from <@&${
					oldRoles[args.level]
				}> to <@&${newRoles[args.level]}>.`,
				allowedMentions: AllowedMentions.none()
			});
		}
	}
}