'use strict';

const Discord = require('discord.js');

const { ids: { DEVELOPER_ID } } = require('../config');
const { prefixCommand } = require('../modules');
const { findGuildConfiguration, sendMsg } = require('../handlers');

/** */

/**
 *
 * @function handlers.lessonInstructions
 * @param {Discord.Snowflake} channelId
 * @param {Discord.Guild} guild
 */
module.exports = async (channelId, guild) => {
	const { bot } = require('../pronto');
	const { commands: { lesson, seen, assign, approve }, colours } = await findGuildConfiguration(guild);


	const instructorCommands = `
		\`${await prefixCommand(lesson, guild)} view\` - Preview details and attached resources of an assigned lesson.
		\`${await prefixCommand(lesson, guild)} add\` - Add a resource to a lesson.
		\`${await prefixCommand(lesson, guild)} remove\` - Remove a resource from a lesson.
		\`${await prefixCommand(lesson, guild)} submit\` - Submit a lesson for approval.
		\`${await prefixCommand(seen, guild)}\` - ${seen.description.general}
	`;

	const staffCommands = `
		\`${await prefixCommand(assign, guild)}\` - ${assign.description.general}
		\`${await prefixCommand(approve, guild)}\` - ${approve.description.general}
	`;

	const instructionsEmbed = new Discord.MessageEmbed()
		.setAuthor(bot.user.tag, bot.user.avatarURL())
		.setTitle('Instructions')
		.setDescription(`${bot.user} has a comprehensive collection of commands to assist with the assignment and production of lesson plans, with a simple system to manage lesson resources, supporting both file attachments and web links.`)
		.setColor(colours.primary)
		.addField('Instructor Commands', instructorCommands)
		.addField('Training Staff Commands', staffCommands)
		.setFooter(`All lesson commands can be accessed directly without the '${lesson.command}' parent.`);

	const addField = `
		\`${await prefixCommand(lesson, guild)} add <URL>\`
		\`${await prefixCommand(lesson, guild)} add\` with an attached file
	`;

	const addExample = `
		\`${await prefixCommand(lesson, guild)} add https://www.cadetnet.org.nz/\`
		[Example of attaching a file](https://i.imgur.com/sUHIdTB.png)
	`;

	const removeField = `
		\`1.\` Type \`${await prefixCommand(lesson, guild)} remove\`
		\`2.\` A serialised list of submitted resources will be outputted
		\`3.\` Reply with the serial of the resource you wish to remove
		[Example of removing a resource](https://i.imgur.com/QDgRc5F.png)
	`;

	const assignField = `
		\`1.\` Type \`${await prefixCommand(assign, guild)} <user(s)>\`
		\`2.\` Respond to the prompts in DMs
	`;

	const developer = await bot.users.fetch(DEVELOPER_ID);

	const assignExample = `
		\`${await prefixCommand(assign, guild)} @${developer.username}\`
		[Example of DM prompts](https://imgur.com/a/y6iO6d1)
	`;

	const usageEmbed = new Discord.MessageEmbed()
		.setAuthor(bot.user.tag, bot.user.avatarURL())
		.setTitle('Usage')
		.setColor(colours.primary)
		.addField(`${await prefixCommand(lesson, guild)} add`, addField, true)
		.addField('Example', addExample, true)
		.addField(`${await prefixCommand(lesson, guild)} remove`, removeField)
		.addField(`${await prefixCommand(assign, guild)}`, assignField, true)
		.addField('Example', assignExample, true);

	const instructionsChannel = bot.channels.cache.get(channelId);

	await sendMsg(instructionsChannel, { embeds: [instructionsEmbed] });
	await sendMsg(instructionsChannel, { embeds: [usageEmbed] });
	await sendMsg(instructionsChannel, { content: 'https://youtu.be/CKYvvE2ILAE' });
};