const { SlashCommandBuilder, Discord, codeBlock, EmbedBuilder } = require('discord.js');
const fs = require('fs');
var path = require('node:path');
//const { writeFile } = require('../main.cjs'); 

module.exports = {
	data: new SlashCommandBuilder()
		.setName('drawdesign')
		.setDescription('Draws a design in a codeblock')
		.addStringOption(option =>
			option.setName('design')
				.setDescription("Pick a design. (number 1-4)")
				.setRequired(true)
		)
		.addStringOption(option =>
			option.setName('string')
				.setDescription("String to feed into input")
				.setRequired(true)
		),
	async execute(interaction, client) {
		let inputString = interaction.options.getString('string');
		let design = parseInt(interaction.options.getString('design'));
		if (design < 1 || design > 4) {
			await interaction.reply('Invalid design choice.');
			return;
		}
		let output;
		switch (design) {
			case 1:
				output = design1(inputString);
				break;
			case 2:
				output = design2(inputString);
				break;
			case 3:
				output = design3(inputString);
				break;
			case 4:
				output = design4(inputString);
		}
		console.log(codeBlock("", output));
		let testLength = "\n" + 'output length was ' + (output.length) + " characters.";
		if (output.length + testLength.length > 2000) {
			//await interaction.reply('Error: String is too big. Resultant output would be too big to send to Discord. (the output length was ' + (output.length + testLength.length) + " characters.)");
			let replyString = "output length was " + (output.length) + " characters.";
			let filePath = writeFile(output);
			await interaction.reply({content:replyString, files: [filePath] });
			fs.unlinkSync(filePath); // Delete file once we're done with it
		} else {
			await interaction.reply(codeBlock("", output) + testLength);
		}
		console.log("User " + interaction.user.tag + " ran /drawtriangle");
	},
};

function writeFile(content) {
	//console.log(content);
	console.log("Attempting to write string to file...");
	let filename = Date.now()+'.txt';
	console.log(filename);
	var filePath = path.join(__dirname, '..', filename);
	console.log(filePath);
	fs.writeFile(filePath, content, err => {
		if (err) {
			console.error(err);
		}
	});
	return filePath;	
}

function design1(input) {
	console.log("Running design1...");
	let outputString;
	let startEnd = "";
	for (let i = 0; i < input.length + 2; i++) {
		startEnd += "*";
	}
	outputString = startEnd + "\n";
	outputString += "*" + "\n";
	outputString += "* " + input + "\n";
	outputString += "*" + "\n";
	outputString += startEnd;
	return outputString;
}
function design2(input) {
	console.log("Running design2...");
	let outputString;
	let height = (input.length * 2) + 6;
	let mid = Math.trunc(height / 2) + 1;
	if (height % 2 == 0) {
		height++;
	}
	outputString = "";
	for (let i = 0; i < height; i++) {
		if (mid == i) { //Determine if we're in the middle of the triangle
			outputString += "**" + input + "**";
		} else {
			for (let j = 0; j < i; j++) {
				outputString += "*";
			}
		}
		outputString += "\n";
	}
	return outputString;
}
function design3(input) {
	console.log("Running design3...");
	let outputString;
	let height = (input.length * 2) + 6;
	let mid = Math.trunc(height / 2) + 1;
	if (height % 2 == 0) {
		height++;
	}
	outputString = "";
	if (mid % 2 == 1) { // Skip a line if odd
		var subOffset = 1;
		var addOffset = 0;
	} else {
		var subOffset = 0;
		var addOffset = 1;
	}
	for (let i = 0; i < mid - addOffset; i++) {
		for (let j = 0; j < i; j++) {
			if (i % 2 == 1) {
				if (i != (mid - 1)) {
					if (i == 0 || (j == 0 || j == (i - 1))) { // Check if we're at the beginning or end of the line
						outputString += "*";
					} else {
						outputString += " ";
					}
				}
			}
		}
		outputString += "\n";
	}
	outputString += "* " + input + " *\n";
	for (let i = mid - subOffset; i > 0; i--) {
		for (let j = 0; j < i; j++) {
			if (i % 2 == 1) {
				if (j != (mid - 1) || (j != mid)) {
					if ((i == 0 || (j == 0 || j == (i - 1)))) { // Check if we're at the beginning or end of the line
						outputString += "*";
					} else {
						outputString += " ";
					}
				}
			}
		}
		outputString += "\n";
	}
	return outputString;
}

function design4(input) {
	let outputString = "";
	let outputLine = "";
	let radius = (input.length + 1);
	let mid = radius;
	if (mid % 2 == 1) {
		var spaceOffset = " ";
	} else {
		var spaceOffset = "";
	}
	console.log(radius, mid);
	// dist represents distance to the center
	let dist = parseFloat(0);
	let space = ""
	for (let i = 0; i < (input.length / 2); ++i) {
		space += " ";
	}
	// for horizontal movement
	var i;
	var j;
	let lineHasInput = false;
	for (i = 0; i <= 2 * radius; i++) {
		lineHasInput = false;
		if (Math.trunc(i) != mid) {
				// for vertical movement
				for (j = 0; j <= 2 * radius; j++) {
					dist = Math.sqrt(
						((i - radius) * (i - radius) * 4) +
						(j - radius) * (j - radius)
					);
						//console.log(i, j, radius, dist);
					// dist should be in the range (radius - 0.5)
					// and (radius + 0.5) to print stars(*)
		
						
						if (dist > radius - 1 && dist < radius + 1) { //&& dist > radius - 1
							lineHasInput = true;
							outputLine += "·";
						} else {
							outputLine += " ";
						}
				}
		} else {
			lineHasInput = true;
			outputLine += "·" + space + input + space + spaceOffset + "·";
		}

		//console.log(i, j, outputLine);
		if (lineHasInput) {
			outputString += outputLine + "\n";
		}
		outputLine = "";
	}
	return outputString;
}
console.log(design4("super long test string super long test string"));
//"super long test string super long test string"