import fs from "fs";
import path from "path";
import { stripIndent } from "common-tags";
import chokidar from "chokidar";
import kleur from "kleur";
import getAllFiles from "../utils/getAllFiles.js";
import buildSource from "./processes/buildSource.js";
import runSolution from "./processes/runSolution.js";
import getLatestVersion from "./processes/getLatestVersion.js";
import copy from "../io/copy.js";
import save from "../io/save.js";
import { aocAutomationDaysJSON } from "../configs/runnerJSON.js";
import { readConfig, saveConfig } from "../io/config.js";
import { getInput, getPuzzleInfo, sendSolution, Status } from "../io/api.js";
import readmeYearMD from "../configs/readmeYearMD.js";
import readmeDayMD from "../configs/readmeDayMD.js";
import asciiPrompt, { AsciiOptions } from "../prompts/asciiPrompt.js";
import commandPrompt from "../prompts/commandPrompt.js";
import type { Config } from "../types/common";
import updateReadmes from "./updateReadMe.js";
import version from "../version.js";

let latestVersion: string | null = null;
getLatestVersion().then(v => {
	latestVersion = v;
});

const boldMagenta = kleur.bold().magenta;

const showFullInfo = () => {
	const updateInfo =
		latestVersion === null
			? ""
			: latestVersion !== version
			? `(update available: v${latestVersion})`
			: "(latest)";

	console.log();
	console.log(stripIndent`
    AoC Runner v${version} ${updateInfo}

    Type ${boldMagenta("fetch")} or ${boldMagenta("f")} - to fetch the input
    Type ${boldMagenta("send")}  or ${boldMagenta("s")} - to send the solutions
    Type ${boldMagenta("help")}  or ${boldMagenta("h")} - to show all commands
    Type ${boldMagenta("clear")} or ${boldMagenta("c")} - to clear the console
    Type ${boldMagenta("quit")}  or ${boldMagenta("q")} - to close the runner
  `);
	console.log();
};

const showInfo = () => {
	console.log();
	console.log(stripIndent`
    Type: ${boldMagenta("f")} - fetch input, ${boldMagenta(
		"s",
	)} - send solutions, ${boldMagenta("h")} - help,  ${boldMagenta("q")} - quit
  `);

	if (latestVersion !== null && latestVersion !== version) {
		console.log();
		console.log(kleur.green(`Update available (v${latestVersion})!`));

		console.log(
			`To update, close the runner and run`,
			kleur.bold().green("npm i aoc-automation"),
		);
	}

	console.log();
};

const send = async (
	config: Config,
	yearNum: number,
	dayNum: number,
	part: 1 | 2,
) => {
	const yearConfig = config.years.find(y => y.year == yearNum)!;
	console.log(`\nPart ${part}:`);
	const dayData =
		part === 1
			? yearConfig.days[dayNum - 1].part1
			: yearConfig.days[dayNum - 1].part2;

	if (dayData.solved) {
		console.log(kleur.green(`Already solved!`));
		return true;
	}

	if (dayData.attempts.includes(dayData.result)) {
		console.log(kleur.yellow("You already tried this solution, skipping."));
		return false;
	}

	if (dayData.result === null) {
		console.log(kleur.yellow(`Solution is undefined, skipping.`));
		return false;
	}

	if (/\n/.test(dayData.result)) {
		console.log(
			kleur.yellow(stripIndent`
      Solution to part ${part} is a multiline string,
      and should probably be interpreted before sending.
    `),
		);
		console.log();

		const { choice, replacement } = await asciiPrompt(part);

		switch (choice) {
			case AsciiOptions.INTERPRETED:
				if (replacement !== undefined && replacement !== "") {
					dayData.result = replacement;
				} else {
					console.log(
						kleur.yellow(`Solution is undefined, skipping.`),
					);
					return false;
				}
				break;
			case AsciiOptions.AS_IS:
				break;
			case AsciiOptions.CANCEL: {
				console.log(kleur.yellow(`Skipping.`));
				return false;
			}
		}
	}

	const status = await sendSolution(
		yearConfig.year,
		dayNum,
		part,
		dayData.result,
	);

	if (status === Status["SOLVED"]) {
		yearConfig.days[dayNum - 1][part === 1 ? "part1" : "part2"].solved =
			true;
		saveConfig(config);
		updateReadmes(yearConfig.year.toString(), dayNum);
		return true;
	}

	if (status === Status["WRONG"]) {
		yearConfig.days[dayNum - 1][
			part === 1 ? "part1" : "part2"
		].attempts.push(dayData.result);
		saveConfig(config);
	}

	return false;
};

const dev = async (yearRaw: string | undefined, dayRaw: string | undefined) => {
	let year = yearRaw && (yearRaw.match(/\d{4}/) ?? [])[0];
	let day = dayRaw && (dayRaw.match(/\d+/) ?? [])[0];
	const today = new Date();

	if (year === undefined) {
		year = today.getFullYear().toString();
	}
	if (day === undefined) {
		day = today.getDate().toString();
	}

	const config = readConfig();
	const yearNum = Number(year);
	const dayNum = Number(day);

	if (yearNum < 2015 || yearNum > today.getFullYear()) {
		console.log(
			kleur.red(
				`Wrong year - choose year between 2015 and ${new Date().getFullYear()}.`,
			),
		);
		process.exit(1);
	}
	if (dayNum < 1 || dayNum > 25) {
		console.log(kleur.red("Wrong day - choose day between 1 and 25."));
		process.exit(1);
	}

	let configYear = config.years.find(y => y.year == yearNum);

	if (configYear == undefined) {
		const yearDir = path.join("src", year);
		fs.mkdirSync(yearDir, { recursive: true });
		config.years.push(
			(configYear = { year: yearNum, days: aocAutomationDaysJSON() }),
		);
		config.years.sort((a, b) => a.year - b.year);
		saveConfig(config);
		save(
			yearDir,
			"README.md",
			readmeYearMD(
				config.language,
				config.years.find(y => y.year === Number(year))!,
			),
		);
	}

	console.log(`Starting ${year} Day ${day}...`);

	const dayDir = `day${String(dayNum).padStart(2, "0")}`;
	const fromDir = path.join("src", "template");
	const yearDir = path.join("src", yearRaw!);

	const toDir = path.join(yearDir, dayDir);
	const indexFile = path.join(
		config.language === "ts" ? "dist" : "src",
		yearRaw!,
		dayDir,
		"index.js",
	);
	const inputPath = path.join(toDir, "input.txt");
	const dayReadmePath = path.join(toDir, "README.md");

	if (!fs.existsSync(fromDir)) {
		console.log(kleur.red("Template folder does not exist!"));
	}

	const toExists = fs.existsSync(toDir);
	const puzzleInfo = await getPuzzleInfo(yearNum, dayNum);
	const [title, _, __, ___, ____] = puzzleInfo;
	
	if (!toExists) {
		console.log("Creating from template...");
		copy(fromDir, toDir);

		fs.writeFileSync(inputPath, "");

		if (!fs.existsSync(dayReadmePath)) {
			if (title != null) {
				configYear.days[dayNum - 1].title = title;
				saveConfig(config);
			}
			fs.writeFileSync(
				dayReadmePath,
				readmeDayMD(configYear.year, dayNum, title),
			);
		}
	}

	const dayIndexFile = path.join(toDir, config.language == "ts" ? "index.ts" : "index.js");
	getInput(yearNum, dayNum, inputPath, dayIndexFile, puzzleInfo);

	if (toExists) {
		const files = getAllFiles(path.join("src", year));
		if (config.language === "ts") {
			buildSource(year, files);
		}
		runSolution(dayNum, indexFile);
	}

	const reload = (file: string) => {
		if (![".js", ".ts", ".mjs"].includes(path.parse(file).ext)) {
			return;
		}

		console.clear();

		if (config.language === "ts") {
			buildSource(year!, file);
		}

		runSolution(dayNum, indexFile);

		showInfo();

		process.stdout.write(kleur.cyan("?") + kleur.gray("  › "));
	};

	chokidar
		.watch([path.join("src", "utils"), path.join("src", year)], {
			ignoreInitial: true,
		})
		.on("add", reload)
		.on("change", reload);

	const listenToInput = async (year: string) => {
		showInfo();

		const { command } = await commandPrompt();

		const config = readConfig();
		const yearNum = Number(year);

		switch (command.toLowerCase()) {
			case "fetch":
			case "f":
				const puzzleInfo = await getPuzzleInfo( yearNum, dayNum );
				getInput(yearNum, dayNum, inputPath, dayIndexFile, puzzleInfo);
				break;
			
			case "send":
			case "s":
				const solved = await send(config, yearNum, dayNum, 1);

				if (solved) {
					await send(config, yearNum, dayNum, 2);
				}
				break;
			case "help":
			case "h":
				showFullInfo();
				break;
			case "clear":
			case "c":
				console.clear();
				break;
			case "quit":
			case "q":
				process.exit();
			default:
				console.log("Command not supported");
				break;
		}
		listenToInput(year);
	};

	listenToInput(year);
};

export default dev;