require('dotenv').config();

const cron = require('node-cron');
const http = require('http');

const PHP_BASE   = process.env.PHP_BASE_URL || 'http://127.0.0.1';
const PHP_WEBROOT = process.env.PHP_WEBROOT || '/mn3wms/app';
const SECRET     = process.env.EMIT_SECRET  || '';

function callPhp(path, body) {
    return new Promise((resolve, reject) => {
        const payload = JSON.stringify(body);
        const url     = new URL(PHP_BASE + PHP_WEBROOT + path);

        const options = {
            hostname: url.hostname,
            port:     url.port || 80,
            path:     url.pathname,
            method:   'POST',
            headers: {
                'Content-Type':    'application/json',
                'Content-Length':  Buffer.byteLength(payload),
                'x-cron-secret':   SECRET,
            },
        };

        const req = http.request(options, (res) => {
            let data = '';
            res.on('data', (chunk) => { data += chunk; });
            res.on('end', () => {
                try { resolve(JSON.parse(data)); }
                catch (e) { reject(new Error('Bad JSON: ' + data.slice(0, 100))); }
            });
        });

        req.on('error', reject);
        req.write(payload);
        req.end();
    });
}

// ── ETL GL Summary maintenance — runs every hour ─────────────────────────────
// Checks and repairs etl_gl_summary (GL aggregation table).
// Each company has a fixed slot = company_id % 24 — load is spread across 24 hours.
// For etl_stock_summary add a separate schedule below when ready.
cron.schedule('0 * * * *', async () => {
    const slot = new Date().getHours();
    console.log(`[scheduler] etl_gl slot=${slot}`);

    try {
        const result = await callPhp('/cron/etl_gl_maintenance.php', { slot });
        const summary = (result.results || []).map(r =>
            r.error
                ? `company=${r.company_id} ERROR: ${r.error}`
                : `company=${r.company_id} gaps=${r.gaps_found} rebuilt=${r.periods_rebuilt}`
        );
        if (summary.length === 0) {
            console.log(`[scheduler] etl_gl slot=${slot} — no companies`);
        } else {
            summary.forEach(s => console.log(`[scheduler] etl_gl ${s}`));
        }
    } catch (e) {
        console.error('[scheduler] etl_gl_maintenance failed:', e.message);
    }
});

// ── ETL Stock Summary maintenance — runs every hour ──────────────────────────
// Checks and repairs etl_stock_summary (stock aggregation table).
// Same slot-based distribution as GL: company_id % 24.
cron.schedule('30 * * * *', async () => {
    const slot = new Date().getHours();
    console.log(`[scheduler] etl_stock slot=${slot}`);

    try {
        const result = await callPhp('/cron/etl_stock_maintenance.php', { slot });
        const summary = (result.results || []).map(r =>
            r.error
                ? `company=${r.company_id} ERROR: ${r.error}`
                : `company=${r.company_id} gaps=${r.gaps_found} rebuilt=${r.periods_rebuilt}`
        );
        if (summary.length === 0) {
            console.log(`[scheduler] etl_stock slot=${slot} — no companies`);
        } else {
            summary.forEach(s => console.log(`[scheduler] etl_stock ${s}`));
        }
    } catch (e) {
        console.error('[scheduler] etl_stock_maintenance failed:', e.message);
    }
});

console.log('[scheduler] running — etl_gl_maintenance + etl_stock_maintenance wired (hourly, slot-based)');