#!/usr/bin/env node
import { existsSync, readFileSync, writeFileSync } from 'node:fs';
import { extname } from 'node:path';
import { parseArgs } from 'node:util';
import chalk from 'chalk';
import { watch } from 'chokidar';
import JSON5 from 'json5';
import { Low } from 'lowdb';
import { DataFile, JSONFile } from 'lowdb/node';
import { fileURLToPath } from 'node:url';
import { createApp } from './app.js';
import { Observer } from './observer.js';
function help() {
    console.log(`Usage: json-server [options] <file>

Options:
  -p, --port <port>  Port (default: 3000)
  -h, --host <host>  Host (default: localhost)
  -s, --static <dir> Static files directory (multiple allowed)
  --help             Show this message
  --version          Show version number
`);
}
// Parse args
function args() {
    try {
        const { values, positionals } = parseArgs({
            options: {
                port: {
                    type: 'string',
                    short: 'p',
                    default: process.env['PORT'] ?? '3000',
                },
                host: {
                    type: 'string',
                    short: 'h',
                    default: process.env['HOST'] ?? 'localhost',
                },
                static: {
                    type: 'string',
                    short: 's',
                    multiple: true,
                    default: [],
                },
                help: {
                    type: 'boolean',
                },
                version: {
                    type: 'boolean',
                },
                // Deprecated
                watch: {
                    type: 'boolean',
                    short: 'w',
                },
            },
            allowPositionals: true,
        });
        // --version
        if (values.version) {
            const pkg = JSON.parse(readFileSync(fileURLToPath(new URL('../package.json', import.meta.url)), 'utf-8'));
            console.log(pkg.version);
            process.exit();
        }
        // Handle --watch
        if (values.watch) {
            console.log(chalk.yellow('--watch/-w can be omitted, JSON Server 1+ watches for file changes by default'));
        }
        if (values.help || positionals.length === 0) {
            help();
            process.exit();
        }
        // App args and options
        return {
            file: positionals[0] ?? '',
            port: parseInt(values.port),
            host: values.host,
            static: values.static,
        };
    }
    catch (e) {
        if (e.code === 'ERR_PARSE_ARGS_UNKNOWN_OPTION') {
            console.log(chalk.red(e.message.split('.')[0]));
            help();
            process.exit(1);
        }
        else {
            throw e;
        }
    }
}
const { file, port, host, static: staticArr } = args();
if (!existsSync(file)) {
    console.log(chalk.red(`File ${file} not found`));
    process.exit(1);
}
// Handle empty string JSON file
if (readFileSync(file, 'utf-8').trim() === '') {
    writeFileSync(file, '{}');
}
// Set up database
let adapter;
if (extname(file) === '.json5') {
    adapter = new DataFile(file, {
        parse: JSON5.parse,
        stringify: JSON5.stringify,
    });
}
else {
    adapter = new JSONFile(file);
}
const observer = new Observer(adapter);
const db = new Low(observer, {});
await db.read();
// Create app
const app = createApp(db, { logger: false, static: staticArr });
function logRoutes(data) {
    console.log(chalk.bold('Endpoints:'));
    if (Object.keys(data).length === 0) {
        console.log(chalk.gray(`No endpoints found, try adding some data to ${file}`));
        return;
    }
    console.log(Object.keys(data)
        .map((key) => `${chalk.gray(`http://${host}:${port}/`)}${chalk.blue(key)}`)
        .join('\n'));
}
const kaomojis = ['♡⸜(˶˃ ᵕ ˂˶)⸝♡', '♡( ◡‿◡ )', '( ˶ˆ ᗜ ˆ˵ )', '(˶ᵔ ᵕ ᵔ˶)'];
function randomItem(items) {
    const index = Math.floor(Math.random() * items.length);
    return items.at(index) ?? '';
}
app.listen(port, () => {
    console.log([
        chalk.bold(`JSON Server started on PORT :${port}`),
        chalk.gray('Press CTRL-C to stop'),
        chalk.gray(`Watching ${file}...`),
        '',
        chalk.magenta(randomItem(kaomojis)),
        '',
        chalk.bold('Index:'),
        chalk.gray(`http://localhost:${port}/`),
        '',
        chalk.bold('Static files:'),
        chalk.gray('Serving ./public directory if it exists'),
        '',
    ].join('\n'));
    logRoutes(db.data);
});
// Watch file for changes
if (process.env['NODE_ENV'] !== 'production') {
    let writing = false; // true if the file is being written to by the app
    let prevEndpoints = '';
    observer.onWriteStart = () => {
        writing = true;
    };
    observer.onWriteEnd = () => {
        writing = false;
    };
    observer.onReadStart = () => {
        prevEndpoints = JSON.stringify(Object.keys(db.data).sort());
    };
    observer.onReadEnd = (data) => {
        if (data === null) {
            return;
        }
        const nextEndpoints = JSON.stringify(Object.keys(data).sort());
        if (prevEndpoints !== nextEndpoints) {
            console.log();
            logRoutes(data);
        }
    };
    watch(file).on('change', () => {
        // Do no reload if the file is being written to by the app
        if (!writing) {
            db.read().catch((e) => {
                if (e instanceof SyntaxError) {
                    return console.log(chalk.red(['', `Error parsing ${file}`, e.message].join('\n')));
                }
                console.log(e);
            });
        }
    });
}