const discord = require("discord.js");
const client = new discord.Client;
var request = require("request");
var query = "";

// Duck Duck Go search function
async function duckduckgo(input){
	return new Promise(resolve => {
		request({url: "https://api.duckduckgo.com/?q="+encodeURI(input)+"&format=json&pretty=1", json: true}, (error, response, body) => {
			if(!error && response.statusCode === 200){
				resolve(body);
			}
		})
	});
}

// YouTube search function
async function youtube(input){
	return new Promise(resolve => {
		request({url: "https://www.googleapis.com/youtube/v3/search?part=snippet&q="+encodeURI(input)+"&type=video&key="+ytapikey, json: true}, (error, response, body) => {
			if(!error && response.statusCode === 200){
				resolve(body);
			}
		})
	});
}

// Discord.js ready
client.once("ready", () => {
	console.log("Ready!");
});

// Message received through Discord
client.on("message", message =>{
	query = "";
	// ============================================================ REACTIONS
	 if(message.content.toLowerCase().includes("ducktest")){
	 	// message.react(":722576975696232498:");
	 }
	// ============================================================ RULES
	if(message.content.toLowerCase() == "!rules"){
		message.channel.send("```Just don't be a dink.```");
	// ============================================================ SEARCH
	}else if(message.content.toLowerCase().substr(0,3) == "!s "){
		// Get the command via message
		query = message.content.slice(3);
		// Initiate Duck Duck Go query
		duckduckgo(query).then(json =>{
			// Check if search results in a title
			if((json.Heading.length > 0)&&(json.AbstractText.length > 0)){
				// If result has image
				if(json.Image.length > 0){
					message.channel.send("**"+json.Heading+"**"+" \r\n"+"> "+json.AbstractText+" \r\n"+json.Image);
				// If result doesn't have image
				}else{
					message.channel.send("**"+json.Heading+"**"+" \r\n"+"> "+json.AbstractText);
				}
			// Look for fallbacks if search results in no title
			}else{
				// If no related results exist
				if((json.RelatedTopics === undefined)||(json.RelatedTopics.length == 0)){
					message.channel.send("**"+query+"**"+" \r\n"+"No results, chump.");
				// If related results exist
				}else{
					// If related result has text
					if(json.RelatedTopics[0].Text.length > 0){
						// If related result has an image
						if(json.RelatedTopics[0].Icon.URL.length > 0){
							message.channel.send("**"+query+"**"+" \r\n"+"> "+json.RelatedTopics[0].Text+" \r\n"+json.RelatedTopics[0].Icon.URL);
						// If related result has no image
						}else{
							message.channel.send("**"+query+"**"+" \r\n"+"> "+json.RelatedTopics[0].Text);
						}
					// If related result has no text
					}else{
						message.channel.send("**"+query+"**"+" \r\n"+"No results, chump.");
					}
				}
			}
			// console.log("============================================");
			// console.log("======================   "+json.Heading+"   ======================");
			// console.log("============================================");
			// console.log(json);
			// console.log("============================================");
			// console.log("============================================");
			// console.log("============================================");
		});
	// ============================================================ YOUTUBE
	}else if(message.content.toLowerCase().substr(0,4) == "!yt "){
		// Get the command via message
		query = message.content.slice(4);
		// Initiate YouTube query
		youtube(query).then(json => {
			// If no search items are defined
			if((json.items === undefined)||(json.items == 0)){
				message.channel.send("**"+query+"**"+" \r\n"+"No results, chump.");
			// If search result item and its video ID and title exist
			}else if((json.items[0].id["videoId"].length > 0)&&(json.items[0].snippet["title"].length > 0)){
				message.channel.send("**"+query+"**"+" \r\n"+"http://youtu.be/"+json.items[0].id["videoId"]);
			// Fallback to no results
			}else{
				message.channel.send("**"+query+"**"+" \r\n"+"No results, chump.");
			}
		});
	// ============================================================ JAM
	}
});