const Discord = require("discord.js");
const got = require("got");
const fetch = require("node-fetch");

module.exports = (client) => {
	client.permlevel = message => {
		let permlvl = 0;

		const permOrder = client.config.permLevels.slice(0).sort((p, c) => p.level < c.level ? 1 : -1);

		while (permOrder.length) {
			const currentLevel = permOrder.shift();
			if (message.guild && currentLevel.guildOnly) continue;
			if (currentLevel.check(message)) {
				permlvl = currentLevel.level;
				break;
			}
		}
		return permlvl;
	};
	
	const defaultSettings = {
		"prefix": "b&",
		"modLogChannel": "mod-log",
		"modRole": "modinator",
		"adminRole": "adminator",
		"systemNotice": "true",
		"welcomeChannel": "welcome",
		"welcomeMessage": "Say hello to {{user}}, everyone! We all need a warm welcome sometimes :D",
		"welcomeEnabled": "false"
	};
	
	client.getSettings = (guild) => {
		client.settings.ensure("default", defaultSettings);
		if(!guild) return client.settings.get("default");
		const guildConf = client.settings.get(guild.id) || {};
		return ({...client.settings.get("default"), ...guildConf});
	};
	
	client.awaitReply = async (msg, question, limit = 60000) => {
		const filter = m => m.author.id === msg.author.id;
		await msg.channel.send(question);
		try {
			const collected = await msg.channel.awaitMessages(filter, { max: 1, time: limit, errors: ["time"] });
			return collected.first().content;
		} catch (e) {
			return false;
		}
	};
	
	client.caseNumber = async (client, modlog) {
  		const messages = await modlog.fetchMessages({limit:5});
  		
  		const log = messages.filter(m => m.author.id === client.user.id &&
    			m.embeds[0] &&
    			m.embeds[0].type === 'rich' &&
    			m.embeds[0].footer &&
    			m.embeds[0].footer.text.startsWith('Case')
  		).first();
  		
  		if (!log) return 1;
  		const thisCase = /Case\s(\d+)/.exec(log.embeds[0].footer.text);
  		return thisCase ? parseInt(thisCase[1]) + 1 : 1;
	};
	
	client.clean = async (client, text) => {
		if (text && text.constructor.name == "Promise")
			text = await text;
		if (typeof text !== "string")
			text = require("util").inspect(text, {depth: 1});

		text = text
			.replace(/`/g, "`" + String.fromCharCode(8203))
			.replace(/@/g, "@" + String.fromCharCode(8203))
			.replace(client.token, "mfa.VkO_2G4Qv3T--NO--lWetW_tjND--TOKEN--QFTm6YGtzq9PH--4U--tG0");

		return text;
	};

	client.loadCommand = (commandName) => {
		try {
			client.logger.log(`Loading Command: ${commandName}`);
			const props = require(`../${commandName}`);
			if (props.init) {
				props.init(client);
			}
			client.commands.set(props.help.name, props);
			props.conf.aliases.forEach(alias => {
				client.aliases.set(alias, props.help.name);
			});
			return false;
		} catch (e) {
			return `Unable to load command ${commandName}: ${e}`;
		}
	};

	client.unloadCommand = async (commandName) => {	
		let command;	
		if (client.commands.has(commandName)) {	
			command = client.commands.get(commandName);	
		} else if (client.aliases.has(commandName)) {	
			command = client.commands.get(client.aliases.get(commandName));	
		}	
		if (!command) return `The command \`${commandName}\` doesn\'t seem to exist, nor is it an alias. Try again!`;	

		if (command.shutdown) {	
			await command.shutdown(client);	
		}	
		const mod = require.cache[require.resolve(`../commands/${command.help.category}/${command.help.name}`)];	
		delete require.cache[require.resolve(`../commands/${command.help.category}/${command.help.name}.js`)];	
		for (let i = 0; i < mod.parent.children.length; i++) {	
			if (mod.parent.children[i] === mod) {	
				mod.parent.children.splice(i, 1);	
				break;	
			}	
		}	
		return false;	
	};
	
	Object.defineProperty(String.prototype, "toProperCase", {
		value: function() {
			return this.replace(/([^\W_]+[^\s-]*) */g, (txt) => txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase());
		}
	});
	
	Object.defineProperty(Array.prototype, "random", {
		value: function() {
			return this[Math.floor(Math.random() * this.length)];
		}
	});
	
	client.wait = require("util").promisify(setTimeout);

	client.randomSelection = choices => choices[Math.floor(Math.random() * choices.length)];

	process.on("uncaughtException", (err) => {
		const errorMsg = err.stack.replace(new RegExp(`${__dirname}/`, "g"), "./");
		client.logger.error(`Uncaught Exception: ${errorMsg}`);
		console.error(err);
		process.exit(1);
	});

	process.on("unhandledRejection", err => {
		client.logger.error(`Unhandled rejection: ${err}`);
		console.error(err);
	});

	client.parseArgs = (args, options) => {
		if (!options)
			return args;
		if (typeof options === 'string')
			options = [options];

		let optionValues = {};

		let i;
		for (i = 0; i < args.length; i++) {
			let arg = args[i];
			if (!arg.startsWith('-')) {
				break;
			}

		let label = arg.substr(1);

			if (options.indexOf(label + ':') > -1) {
				let leftover = args.slice(i + 1).join(' ');
				let matches = leftover.match(/^"(.+?)"/);
				if (matches) {
					optionValues[label] = matches[1];
					i += matches[0].split(' ').length;
				} else {
					i++;
					optionValues[label] = args[i];
				}
			} else if (options.indexOf(label) > -1) {
				optionValues[label] = true;
			} else {
				break;
			}
		}

		return {
			options: optionValues,
			leftover: args.slice(i)
		};
	};

	client.embed = (title, description = '', fields = [], options = {}) => {
		let url = options.url || '';
		let color = options.color || randomColor();

		if (options.inline) {
			if (fields.length % 3 === 2) {
				fields.push({ name: '\u200b', value: '\u200b' });
			}
			fields.forEach(obj => {
				obj.inline = true;
			});
		}

		return new Discord.RichEmbed({ fields, video: options.video || url })
			.setTitle(title)
			.setColor(color)
			.setDescription(description)
			.setURL(url)
			.setImage(options.image)
			.setTimestamp(options.timestamp ? timestampToDate(options.timestamp) : null)
			.setFooter(options.footer === true ? randomFooter() : (options.footer ? options.footer : ''), options.footerIcon === true ? options.footerIcon : client.user.avatarURL)
			.setAuthor(options.author === undefined ? '' : options.author, options.authorIcon)
			.setThumbnail(options.thumbnail);
	};

	const randomColor = () => [
		Math.floor(Math.random() * 256),
		Math.floor(Math.random() * 256),
		Math.floor(Math.random() * 256)
	];

	const randomFooter = () => {
		return randomSelection([
			'just add water!',
			'Powered by squirrels!',
			'codeisluvcodeislife',
			'Where did you get that?',
			'WHAT DID YOU BREAK!?',
			'D-D-D-DROP THE BASS',
			'Eat, Sleep, JavaScript',
			'#BlameRhearmas',
			'SharpBot was the best, right?',
			'I like turtles',
			'Hi mom!'
		]);
	};

	const timestampToDate = timestamp => {
		if (timestamp === true) {
			return new Date();
		}
		if (typeof timestamp === 'number') {
			return new Date(timestamp);
		}
		return timestamp;
	};

	const parseArgs = (args, options) => {
		if (!options)
			return args;
		if (typeof options === 'string')
			options = [options];

		let optionValues = {};

		let i;
		for (i = 0; i < args.length; i++) {
			let arg = args[i];
			if (!arg.startsWith('-')) {
				break;
			}

			let label = arg.substr(1);

			if (options.indexOf(label + ':') > -1) {
				let leftover = args.slice(i + 1).join(' ');
				let matches = leftover.match(/^"(.+?)"/);
				if (matches) {
					optionValues[label] = matches[1];
					i += matches[0].split(' ').length;
				} else {
					i++;
					optionValues[label] = args[i];
				}
			} else if (options.indexOf(label) > -1) {
				optionValues[label] = true;
			} else {
				break;
			}
		}

		return {
			options: optionValues,
			leftover: args.slice(i)
		};
	};

	const multiSend = (channel, messages, delay) => {
		delay = delay || 100;
		messages.forEach((m, i) => {
			setTimeout(() => {
				channel.send(m);
			}, delay * i);
		});
	};

	client.textUpload = (text, options) => {
		options = options || {};
		let method = (options.method || uploadMethods.ix).toLowerCase();

		if (method === uploadMethods.ix) {
			return ixUpload(text);
		} else if (method === uploadMethods.hastebin) {
			return hastebinUpload(text);
		}
	};

	const uploadMethods = {
		hastebin: 'hastebin',
		ix: 'ix.io'
	};

	const hastebinUpload = text => {
		return got('https://hastebin.com/documents', { body: { 'contents': text }, form: true })
			.then(res => {
				if (res && res.body && res.body.key) {
					const key = res.body.key;
					return {
						key: key,
						success: true,
						url: `https://hastebin.com/${key}`,
						rawUrl: `https://hastebin.com/raw/${key}`
					};
				} else {
					return {
						success: false
					};
				}
			});
	};

	const ixUpload = text => {
		return got('http://ix.io', { body: { 'f:1': text }, form: true })
			.then(res => {
				if (res && res.body) {
					return {
						success: true,
						url: res.body,
						rawUrl: res.body
					};
				} else {
					return {
						success: false
					};
				}
			});
	};

	client.quoteRegex = input => `${input}`.replace(/[.?*+^$[\]\\(){}|-]/g, '\\$&');

	client.fetchURL = (url, options = {}) => {
        options.headers = options.headers ? { ...options.headers, "User-Agent": client.user } : { "User-Agent": client.user };
        return fetch(url, options, options.type || "json").catch(error => {
            client.Logger.error(error);
        });
    }
};