import chalk from 'chalk';
import LibDashStore from 'libdashstore';
import { MssqlProvider } from 'libdashstore/providers/mssql';
import { BetterSqlite3Provider } from 'libdashstore/providers/better-sqlite3';
import env from '../config/env.js';

let provider;
let store;
let connecting;

const STORE_NAMESPACES = [
    'companyuser',
    'company',
    'category',
    'article',
    'pic',
    'unit',
    'brand',
    'lang',
    'tax',
    'google_auth',
    'posterminal',
    'supplier',
    'delivery',
    'customergroup',
    'entity',
    'entityaddress',
    'entitycontact',
    'quote',
    'order',
    'numbers',
    'companysetting',
    'articlesupplier',
    'manifestattachment',
    'ledger',
    'warehouse',
    'printer',
    'labeltemplate',
    'stock',
    'propertyname',
    'articleproperty',
    'attributename',
    'attributevalue',
    'articleattributevalue',
];

/**
 * Wraps LibDashStore namespace methods so each call logs its duration.
 * @param {InstanceType<typeof LibDashStore>} rawStore
 * @returns {InstanceType<typeof LibDashStore>}
 */
function wrapStoreWithTiming(rawStore) {
    for (const namespace of STORE_NAMESPACES) {
        const api = rawStore[namespace];
        if (!api || typeof api !== 'object') continue;

        for (const [method, fn] of Object.entries(api)) {
            if (typeof fn !== 'function') continue;

            api[method] = async (...args) => {
                const start = Date.now();
                try {
                    const result = await fn(...args);
                    console.log(
                        `${chalk.magenta('libstore')} ${namespace}.${method} ${chalk.gray(`(${Date.now() - start}ms)`)}`
                    );
                    return result;
                } catch (err) {
                    console.error(
                        `${chalk.magenta('libstore')} ${namespace}.${method} ${chalk.red('FAILED')} ` +
                        `${chalk.gray(`(${Date.now() - start}ms)`)} ${chalk.red(err.message)}`
                    );
                    throw err;
                }
            };
        }
    }

    for (const method of ['purge']) {
        const fn = rawStore[method];
        if (typeof fn !== 'function') continue;

        rawStore[method] = async (...args) => {
            const start = Date.now();
            try {
                return await fn(...args);
            } finally {
                const duration = Date.now() - start;
                console.log(`${chalk.magenta('libstore')} ${method} ${chalk.gray(`(${duration}ms)`)}`);
            }
        };
    }

    return rawStore;
}

function getMssqlConfig() {
    const { server, database, user, password, port, encrypt, trustServerCertificate } = env.mssql;

    if (!server || !database || !user || !password) {
        throw new Error('MSSQL is not configured (MSSQL_SERVER, MSSQL_DATABASE, MSSQL_USER, MSSQL_PASSWORD required)');
    }

    return {
        server,
        database,
        user,
        password,
        port,
        pool: {
            max: 10,
            min: 0,
            idleTimeoutMillis: 30_000,
        },
        options: {
            encrypt,
            trustServerCertificate,
        },
    };
}

/**
 * Returns the initialized LibDashStore singleton.
 * @returns {Promise<InstanceType<typeof LibDashStore>>}
 */
export async function getStore() {
    if (store) {
        return store;
    }

    if (!connecting) {
        connecting = (async () => {
            if (env.dbProvider === 'sqlite' || env.dbProvider === 'better-sqlite3') {
                provider = new BetterSqlite3Provider(env.sqlite);
            } else {
                provider = new MssqlProvider(getMssqlConfig());
            }
            await provider.initialize();
            store = wrapStoreWithTiming(await new LibDashStore(provider));
            return store;
        })().finally(() => {
            connecting = undefined;
        });
    }

    return connecting;
}

export async function ensureConnection() {
    await getStore();
}

export async function closeStore() {
    if (provider) {
        await provider.close();
        provider = undefined;
        store = undefined;
    }
}