import { createRequire } from "module";
const require = createRequire(import.meta.url);

const func = require('./functions.js')
const config = require("../config.json")
const fs = require("fs")

// Literally just +1 to the hitcount
export function increment_hitcount(postID = -1) { // -1 Means it will increment the timeline hitcount
    if (config.data_storage == 'json') {
	if (postID == -1) {
		let hitcount = getdata('hitcount');
		hitcount += 1
		writedata('hitcount', hitcount);
	}
	else {
		let post = getdata('posts','id', postID);
		if (typeof post.hitcount != 'undefined') {
			post.hitcount += 1;
			writedata('posts', post, postID)
			return 0
		}
		else {
			post.hitcount = 1;
			writedata('posts', post, postID)
			return 0
		}
		return 1
	}
    }
};

export function searchdata(term, type) { // Searches users and posts for any matches
	let search_results = {"posts": [], "users": []};
	// Search users
	if (type.includes('post')) {
		let list = getdata('posts');
		list.forEach((element,index) => {
			if (typeof element.deleted == 'undefined' || element.deleted == false) {
				if (element.content.includes(term)) {
					search_results.posts.push(element)
				}
				else if (element.title.includes(term)) {
					search_results.posts.push(element)
				}
				else if (element.tags.toString().includes(term)) {
					search_results.posts.push(element)
				};
			};
		});
	}
	if (type.includes('user')) {
		let list = getdata('users');
		list.forEach((element,index) => {
			if (typeof element.deleted == 'undefined' || element.deleted == false) {
				if (element.username.includes(term)) {
					search_results.users.push(element)
				}
				else if (element.prettyname.includes(term)) {
					search_results.users.push(element)
				}
				else if (element.description.includes(term)) {
					search_results.users.push(element)
				};
			};
		});
	}
	return search_results;
};

export function getdata(data_type, key=-1, value=-1) {
	let result = undefined
	switch (config["data_storage"]) {
		case 'json':
			switch (data_type) {
				case 'users':
				case 'posts':
				case 'comments':
					result = func.require_module(`../data/${data_type}.json`)
					if (key != -1) {
						return result[func.find_key_value_pair(result, key, value)]
						return -1 // This index doesn't exist
					}
					return result
					break;
				case 'hitcount':
					result = func.require_module('../data/data.json') // This file is actually called data.json
					return result["hitcount"]
					break;
				default:
					console.log("Error, invalid requested")
					return -1
					break;
			}
			break;
	// NOT YET WORKING!
		case 'mysql':
			const mysql = require('mysql');
			let con = mysql.createConnection({
				host: config.database.host,
				user: config.database.user,
				password: config.database.password,
				database: config.database.database,
			});

			con.connect(function(err) {
				if (err) throw err;

				if (data == "posts" || data == 'users' || data == 'comments') {
					con.query(`SELECT * FROM ${data}`, function (err, result, fields) {
						if (err) throw err;
						result = Object.values(JSON.parse(JSON.stringify(result)))
						console.log(result)
						return result;
					});
				}
				else if (data == 'hitcount') {
					con.query(`SELECT paramValue FROM params WHERE paramName = '${data}'`, function (err, result, fields) {
						if (err) throw err;
						result = Object.values(JSON.parse(JSON.stringify(result)))
						console.log(result)
						return result;
					});

				}
			});
	}
}

export function writedata(data, data_to_write, index=-1) {
	if (config["data_storage"] == "json") {
		if (data == "posts" || data == 'users' || data == 'comments') {
			if (index == -1) {
				fs.writeFileSync(`../data/${data}.json`, JSON.stringify(data_to_write), 'utf-8')
				return 0
			}
			else if (index >= 0) {
				let result = getdata(data);
				result[index] = data_to_write;
				fs.writeFileSync(`../data/${data}.json`, JSON.stringify(result), 'utf-8')
				return 0
			}
			return 1
		}
		else if (data == "hitcount") {
			let other_data = func.require_module('../data/data.json') // This file is actually called data.json
			other_data.hitcount = data_to_write
			fs.writeFileSync('../data/data.json', JSON.stringify(other_data), 'utf-8')
		}
		else {
			console.log("Error, invalid requested")
			return 1
		}
	}
}