/**
Provides tools to manage mods in a clusterio install
@module modManager
*/

const rightpad = require("right-pad");
const asTable = require("as-table").configure({delimiter: ' | '});
const moment = require("moment");
const syncRequest = require("sync-request")

const factorioAPI = require("node-factorio-api");
const fileOps = require("./../fileOps.js");
const config = require("./../../config");

const instances = require("./../getInstances.js").sync();
/**
Lists mods for an instance as a table. Warning, handles printing internally.
@param {string} instance - Name of the instance or "shared"

@example
var modManager = require("modManager");
modManager.listMods("testInstance");
// console.logs table of mods installed on instance
modManager.listMods("shared");
// console.logs mods located in /sharedMods as a nice table
*/
module.exports.listMods = function(instance){
	if(instance && instances.includes(instance)){
		factorioAPI.init(false, 'instances/'+instance+'/instanceMods', 'instances/'+instance+'/saves', '0.16.15');
		console.log("Authenticating to factorio.com...")
		factorioAPI.authenticate({
			username: config.username,
			token: config.token,
			require_ownership: false
		}).then(token => {
			console.log("Currently installed:");
			factorioAPI.readModZips().then(list => {
				console.log(asTable(list.map(mod => {
					return {
						name:(mod.title || mod.name),
						version:mod.version,
						date:mod.date,
						factorio_ver:mod.factorio_version,
						author:mod.author,
					}
				})));
			});
			// Deactivated due to bug in node-factorio-api, see https://github.com/Danacus/node-factorio-api/issues/2
			// bug is resolved, thanks to @Danacus and @brotherpot
			/*factorioAPI.getModsFromSaves().then(list => {
				console.log("Mods used in save:");
				console.log(JSON.stringify(list))
				console.log(asTable(list[0].mods))
			});*/
		}).catch(reason => {
			console.log("Failed to authenticate to factorio.com! Please check your connection and the username+token used for authentication in config.json");
		});
	} else {
		// list shared mods in /sharedMods/
		factorioAPI.init(false, 'sharedMods/', '', '0.16.15');
		console.log("Authenticating to factorio.com...")
		factorioAPI.authenticate({
			username: config.username,
			token: config.token,
			require_ownership: false
		}).then(() => {
			console.log("Mods shared by all instances:")
			factorioAPI.getInstalledMods().then(mods => {
				console.log(asTable(mods));
			});
		});
	}
	
	// get JSON data about GH releases
	/*let res = syncRequest('GET', 'https://api.github.com/repos/Danielv123/factorioClusterioMod/releases', {"headers":{"User-Agent":"Fuck you for requiring user agents!"}});
	let url = JSON.parse(res.getBody())[0].assets[0].browser_download_url;
	let name = JSON.parse(res.getBody())[0].assets[0].name;
	console.log(JSON.parse(res.getBody()))
	*/
}
module.exports.addMod = function(term, instance){
	if(instance == "shared"){ // modDirectory has to end in /
		var modDirectory = "sharedMods/";
	} else {
		var modDirectory = "instances/"+instance+"/instanceMods/";
	}
	if(term && term.length > 0){
		if(term.includes("mods.factorio.com/mods/")){ // https://mods.factorio.com/mods/Danielv123/ChooChoo
			// treat it as a link download
			factorioAPI.init(false, modDirectory, "", "0.16.15");
			factorioAPI.authenticate({
				username: config.username,
				token: config.token,
				require_ownership: false
			}).then(() => {
				factorioAPI.searchMods(
					{q:term.split("/")[term.split("/").length-1], order: 'top',  page_size:1}
				).then(body => {
					console.log("Im gonna download: "+body.results[0].name);
					factorioAPI.downloadMod(body.results[0]).then(()=>{
						console.log("Mod downloaded");
					});
				});
			});
		} else if(term.includes("github.com")){ // https://github.com/Danielv123/factorioClusterioMod
			// treat it as a github releases download
			let apiURL = "https://api.github.com/repos/" + term.split("/")[3] + "/" + term.split("/")[4] + "/releases"; // https://api.github.com/repos/Danielv123/factorioClusterioMod/releases
			
			let res = syncRequest('GET', apiURL, {"headers":{"User-Agent":"Fuck you for requiring user agents!"}});
			let url = JSON.parse(res.getBody())[0].assets[0].browser_download_url;
			let name = JSON.parse(res.getBody())[0].assets[0].name;
			
			if(url) {
				console.log("Downloading " + url);
				let file = fs.createWriteStream(modDirectory + name);
				https.get(url, function(response) {
					response.pipe(file);
					console.log("Downloaded "+name);
				});
			}
		} else {
			// treat it as a search and download the top result
			factorioAPI.init(false, modDirectory, "", "0.16.15");
			factorioAPI.authenticate({
				username: config.username,
				token: config.token,
				require_ownership: false
			}).then(() => {
				factorioAPI.searchMods(
					{q:term, order: 'top',  page_size:1}
				).then(body => {
					console.log("Im gonna download: "+body.results[0].name);
					factorioAPI.downloadMod(body.results[0]).then(()=>{
						console.log("Mod downloaded");
					});
				});
			});
		}
	}
}
/**
Searches mods.factorio.com for mods matching a search term and prints
the results to console as a neat looking table

@param {string} searchTerm What to search for
*/
module.exports.findMods = function(searchTerm){
	factorioAPI.init(false);
	console.log("Authenticating to factorio.com...")
	factorioAPI.authenticate({
		username: config.username,
		token: config.token,
		require_ownership: false
	}).then(token => {
		factorioAPI.searchMods(
			{q: searchTerm, order: 'top', page_size: 20}
		).then(body => {
			let mods = body.results;
			console.log(asTable(mods.map(mod => {
				return {
					title:mod.title,
					name:mod.name,
					downloads:mod.downloads_count,
					updated: moment(mod.updated_at).format("DD.MM.YY"),
					owner:mod.owner,
					//license: mod.license_name,
				}
			})))
		})
	});
}

// 'https://api.github.com/repos/Danielv123/factorioClusterioMod/releases'
/**
Download mod from github repo by looking for the first binary download in 
the latest release, saving it to /sharedMods

@param {string} url a github repo  URL, for example https://api.github.com/repos/Danielv123/factorioClusterioMod/releases. Must link to /releases
*/
module.exports.downloadFromGitURL = function(url){
	console.log("Downloading mod from "+url);
	// get JSON data about releases
	let res = syncRequest('GET', url, {"headers":{"User-Agent":"Please don't require setting a user agent"}});
	let downloadUrl = JSON.parse(res.getBody())[0].assets[0].browser_download_url;
	let name = JSON.parse(res.getBody())[0].assets[0].name;
	console.log(JSON.parse(res.getBody()))
	if(downloadUrl) {
		console.log(downloadUrl);
		let file = fs.createWriteStream("sharedMods/"+name);
		https.get(downloadUrl, function(response) {
			response.pipe(file);
			console.log("Downloaded "+name);
		});
	}
}
/*
module.exports.findUpdates = function(){
	console.log("Downloading mods...");
	// get JSON data about releases
	let res = syncRequest('GET', 'https://api.github.com/repos/Danielv123/factorioClusterioMod/releases', {"headers":{"User-Agent":"Fuck you for requiring user agents!"}});
	let url = JSON.parse(res.getBody())[0].assets[0].browser_download_url;
	let name = JSON.parse(res.getBody())[0].assets[0].name;
	console.log(JSON.parse(res.getBody()))
}*/