import { world, system } from '@minecraft/server';

const stgpref = 'data_server';
const maxm = 5;
const chksz = 32000;
const appsz = 10000;

function getm() {
    const m = [];
    for (let i = 1; i <= maxm; i++) {
        const t = stgpref + i;
        const e = world.getDimension('overworld').getEntities({
            type: 'minecraft:armor_stand',
            tags: [t]
        });
        if (e.length > 0) {
            m.push({ mob: e[0], idx: i });
        } else {
            m.push(null);
        }
    }
    return m;
}

function svd(d) {
    const m = getm();
    const c = [];
    for (let i = 0; i < d.length; i += chksz) {
        c.push(d.substring(i, i + chksz));
    }
    if (c.length > maxm) {
        return false;
    }
    for (let i = 0; i < c.length; i++) {
        const mi = m[i];
        if (!mi) {
            return false;
        }
        mi.mob.setDynamicProperty('data', c[i]);
    }
    for (let i = c.length; i < maxm; i++) {
        if (m[i]) {
            m[i].mob.setDynamicProperty('data', undefined);
        }
    }
    return true;
}

function ldd() {
    const m = getm();
    const p = [];
    for (const mi of m) {
        if (!mi) continue;
        const d = mi.mob.getDynamicProperty('data');
        if (d !== undefined && d !== null && d !== '') {
            p.push(d);
        }
    }
    return p.length > 0 ? p.join('') : null;
}

function gtsz() {
    let t = 0;
    const m = getm();
    for (const mi of m) {
        if (!mi) continue;
        const d = mi.mob.getDynamicProperty('data');
        if (d) t += d.length;
    }
    return t;
}

function shinf() {
    const m = getm();
    let msg = 'DAT ser\n';
    let t = 0;
    for (const mi of m) {
        if (!mi) {
            msg += `${stgpref}?\n`;
            continue;
        }
        const d = mi.mob.getDynamicProperty('data');
        const u = d ? d.length : 0;
        msg += `${stgpref}${mi.idx}: ${u}/${chksz} byte (${(u / 1024).toFixed(1)} KB)\n`;
        t += u;
    }
    msg += `tot: ${t} byte, ${(t / 1024).toFixed(1)} KB`;
    world.sendMessage(msg);
}

function rndstr(l) {
    const c = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    let r = '';
    for (let i = 0; i < l; i++) {
        r += c.charAt(Math.floor(Math.random() * c.length));
    }
    return r;
}

function appnd() {
    const m = getm();
    for (const mi of m) {
        if (!mi) {
            world.sendMessage('Создать всех data_server');
            return;
        }
    }

    let ed = ldd();
    let o;
    if (ed) {
        try {
            o = JSON.parse(ed);
        } catch (e) {
            world.sendMessage('error data');
            o = {};
        }
    } else {
        o = {};
    }

    let fi = 0;
    while (o.hasOwnProperty('field' + fi)) {
        fi++;
    }

    o['field' + fi] = rndstr(appsz);

    const js = JSON.stringify(o);
    const ms = maxm * chksz;

    if (js.length > ms) {
        world.sendMessage(`result (${js.length} byte) limit (${ms} byte)`);
        return;
    }

    if (svd(js)) {
        world.sendMessage(`data: +${appsz} failed${fi}. tot: ${js.length} byte (${(js.length/1024).toFixed(1)} KB).`);
    } else {
        world.sendMessage('failed data');
    }
}

function deld() {
    const m = getm();
    for (const mi of m) {
        if (!mi) continue;
        mi.mob.setDynamicProperty('data', undefined);
    }
    world.sendMessage('delete');
}

function prc() {
    const m = getm();
    for (const mi of m) {
        if (!mi) continue;
        const mob = mi.mob;
        const t = mob.getTags();

        if (t.includes('dynamic')) {
            shinf();
            mob.removeTag('dynamic');
        }
        if (t.includes('over')) {
            appnd();
            mob.removeTag('over');
        }
        if (t.includes('delete_data')) {
            deld();
            mob.removeTag('delete_data');
        }
    }
}

system.runInterval(() => {
    prc();
}, 10);