// Reference:
// - https://docs.deno.com/runtime/fundamentals/testing/

import { assertEquals } from "jsr:@std/assert";

export function compareVersion(ver1: string, ver2: string): 0 | 1 | -1 {
    if (ver1 === ver2) return 0;
    const ver1Parts = ver1.split(".");
    const ver2Parts = ver2.split(".");
    const ver1Main = parseInt(ver1Parts[0]);
    const ver2Main = parseInt(ver2Parts[0]);
    if (ver1Main > ver2Main) return 1;
    if (ver1Main < ver2Main) return -1;
    const ver1Second = parseInt(ver1Parts[1]);
    const ver2Second = parseInt(ver2Parts[1]);
    if (ver1Second > ver2Second) return 1;
    if (ver1Second < ver2Second) return -1;
    const ver1Third = parseInt(ver1Parts[2]);
    const ver2Third = parseInt(ver2Parts[2]);
    if (ver1Third > ver2Third) return 1;
    if (ver1Third < ver2Third) return -1;
    return 0;
}

export function isOn(val: string | undefined): boolean {
    if ((val === null) || (val === undefined)) {
        return false;
    }
    const lowerVal = val.toLowerCase();
    return lowerVal === "on" || lowerVal === "yes" || lowerVal === "1" ||
        lowerVal === "true";
}

export function isEnvOn(envKey: string): boolean {
    return isOn(Deno.env.get(envKey));
}

export function formatHumanTime(timeMillis: number): string {
    const times = [];
    if (timeMillis < 1000) {
        return `${timeMillis}ms`;
    }
    const timeSecs = Math.floor(timeMillis / 1000);
    const timeSecsLow = timeSecs % 60;
    if (timeSecsLow > 0) {
        times.push(`${timeSecsLow}s`);
    }
    const timeMinutes = Math.floor(timeSecs / 60);
    const timeMinutesLow = timeMinutes % 60;
    if (timeMinutesLow > 0) {
        times.push(`${timeMinutesLow}m`);
    }
    const timeHours = Math.floor(timeMinutes / 60);
    const timeHoursLow = timeHours % 24;
    if (timeHoursLow > 0) {
        times.push(`${timeHoursLow}h`);
    }
    const timeDays = Math.floor(timeHours / 24);
    if (timeDays > 0) {
        times.push(`${timeDays}d`);
    }
    return times.reverse().join(" ");
}

export function formatSize(size: number): string {
    if (size < 0) {
        return "N/A";
    }
    if (size == 0) {
        return "0B";
    }
    const sizes = [];
    const bytesLow = size % 1024;
    if (bytesLow > 0) {
        sizes.push(`${bytesLow}B`);
    }
    const kb = Math.floor(size / 1024);
    const kbLow = kb % 1024;
    if (kbLow > 0) {
        sizes.push(`${kbLow}KiB`);
    }
    const mb = Math.floor(kb / 1024);
    const mbLow = mb % 1024;
    if (mbLow > 0) {
        sizes.push(`${mbLow}MiB`);
    }
    const gb = Math.floor(mb / 1024);
    if (gb > 0) {
        sizes.push(`${gb}GiB`);
    }
    return sizes.reverse().join(" ");
}

export function formatSize2(size: number): string {
    if (size < 0) {
        return "N/A";
    }
    if (size < 1024) {
        return `${size}B`;
    }
    if (size < 1024 * 1024) {
        return `${formatNumber(size / 1024)}KiB`;
    }
    return `${formatNumber(size / (1024 * 1024))}MiB`;
}

export function formatPercent(a: number, b: number): string {
    if (b == null || b <= 0) {
        return "N/A";
    }
    return formatNumber((a * 100) / b) + "%";
}

export function formatNumber(num: number): string {
    const p = num.toString();
    const pointIndex = p.indexOf(".");
    if (pointIndex < 0) {
        return p + ".00";
    }
    const decimal = p.substring(pointIndex + 1);
    const decimalPart = decimal.length == 1
        ? (decimal + "0")
        : decimal.substring(0, 2);
    return p.substring(0, pointIndex) + "." + decimalPart;
}

export async function clearLastLine() {
    await printLastLine("");
}

export async function printLastLine(line: string) {
    await Deno.stdout.write(
        new TextEncoder().encode(
            `\x1b[1000D${line}\x1b[K`,
        ),
    );
}

class Term {
    constructor() {
    }

    blink(message: string): string {
        return `\x1b[5m${message}\x1b[0m`;
    }

    bold(message: string): string {
        return `\x1b[1m${message}\x1b[0m`;
    }

    red(message: string): string {
        return `\x1b[31m${message}\x1b[0m`;
    }

    green(message: string): string {
        return `\x1b[32m${message}\x1b[0m`;
    }

    yellow(message: string): string {
        return `\x1b[33m${message}\x1b[0m`;
    }
}

export const term = new Term();

function pad(message: string, length: number): string {
    if (message.length >= length) {
        return message;
    }
    return message + " ".repeat(length - message.length);
}
const LOGGER_PREFIX_LEN: number = 8;
class Logger {
    constructor() {
    }

    // deno-lint-ignore no-explicit-any
    success(...data: any[]) {
        this.log(
            term.bold(term.green(`[${pad("SUCCESS", LOGGER_PREFIX_LEN)}]`)),
            data,
        );
    }

    // deno-lint-ignore no-explicit-any
    error(...data: any[]) {
        this.log(
            term.bold(term.red(`[${pad("ERROR", LOGGER_PREFIX_LEN)}]`)),
            data,
        );
    }

    // deno-lint-ignore no-explicit-any
    warn(...data: any[]) {
        this.log(
            term.bold(term.yellow(`[${pad("WARN", LOGGER_PREFIX_LEN)}]`)),
            data,
        );
    }

    // deno-lint-ignore no-explicit-any
    warning(...data: any[]) {
        this.log(
            term.blink(
                term.bold(term.yellow(`[${pad("WARN", LOGGER_PREFIX_LEN)}]`)),
            ),
            data,
        );
    }

    // deno-lint-ignore no-explicit-any
    info(...data: any[]) {
        this.log(term.bold(`[${pad("INFO", LOGGER_PREFIX_LEN)}]`), data);
    }

    // deno-lint-ignore no-explicit-any
    debug(...data: any[]) {
        this.log(`[${pad("DEBUG", LOGGER_PREFIX_LEN)}]`, data);
    }

    // deno-lint-ignore no-explicit-any
    log(prefix: string, data: any[]) {
        const args = [prefix];
        for (let i = 0; i < data.length; i++) {
            args.push(data[i]);
        }
        console.log.apply(console, args);
    }
}

export const log = new Logger();

Deno.test("isOn", () => {
    assertEquals(false, isOn(undefined));
    assertEquals(false, isOn(""));
    assertEquals(true, isOn("true"));
    assertEquals(true, isOn("TRUE"));
    assertEquals(true, isOn("yes"));
    assertEquals(true, isOn("YES"));
    assertEquals(true, isOn("on"));
    assertEquals(true, isOn("ON"));
    assertEquals(true, isOn("1"));
});

Deno.test("formatHumanTime", () => {
    assertEquals("0ms", formatHumanTime(0));
    assertEquals("1ms", formatHumanTime(1));
    assertEquals("1s", formatHumanTime(1000));
    assertEquals("1s", formatHumanTime(1001));
    assertEquals("1m", formatHumanTime(60001));
    assertEquals("1m 1s", formatHumanTime(61001));
    assertEquals("1h", formatHumanTime(3600000));
    assertEquals("1h 1s", formatHumanTime(3601000));
    assertEquals("1h 1m 1s", formatHumanTime(3661000));
});

Deno.test("formatSize", () => {
    assertEquals("N/A", formatSize(-1));
    assertEquals("0B", formatSize(0));
    assertEquals("1B", formatSize(1));
    assertEquals("1KiB", formatSize(1024));
    assertEquals("1KiB 1B", formatSize(1024 + 1));
    assertEquals("1MiB 1KiB 1B", formatSize(1024 * 1024 + 1024 + 1));
    assertEquals(
        "1GiB 1MiB 1KiB 1B",
        formatSize(1024 * 1024 * 1024 + 1024 * 1024 + 1024 + 1),
    );
});

Deno.test("formatSize2", () => {
    assertEquals("N/A", formatSize2(-1));
    assertEquals("0B", formatSize2(0));
    assertEquals("1B", formatSize2(1));
    assertEquals("1.00KiB", formatSize2(1024));
    assertEquals("10.00KiB", formatSize2(1024 * 10));
    assertEquals("1.00MiB", formatSize2(1024 * 1024));
});

Deno.test("formatPercent", () => {
    assertEquals("N/A", formatPercent(100, -1));
    assertEquals("N/A", formatPercent(100, 0));
    assertEquals("N/A", formatPercent(100, 0));
    assertEquals("10.00%", formatPercent(10, 100));
    assertEquals("11.00%", formatPercent(11, 100));
    assertEquals("1.10%", formatPercent(11, 1000));
    assertEquals("0.10%", formatPercent(1, 1000));
    assertEquals("0.00%", formatPercent(1, 100000));
    assertEquals("100.00%", formatPercent(100, 100));
});