// Fix 2 — validate DSCA33/45 Hoffman-mined renders against the live Hoffman originals.
// For each model: render its _srcSerial (an already-uploaded unit) via the new render
// path and content-normalized-compare it to GET /api/v1/TestReportDataFiles/{_srcSerial}.
// --apply marks passing models `validated:true` in dsca33-45-templates.json (the render
// gate). Read-only otherwise (no DB writes, no Hoffman writes).
process.env.DSCA_VALIDATE_MODE = '1'; // open the render gate for the compare
const fs = require('fs');
const https = require('https');
const db = require('./database/db');
const { renderContent } = require('./database/render-datasheet');

const TPL_PATH = './dsca33-45-templates.json';
const CREDS_PATH = 'C:\\ProgramData\\dataforth-uploader\\credentials.json';
const APPLY = process.argv.includes('--apply');
const only = process.argv.slice(2).filter(a => !a.startsWith('--'));

function creds() { return JSON.parse(fs.readFileSync(CREDS_PATH, 'utf8')); }
function httpReq(method, uri, headers, body) {
    return new Promise((resolve, reject) => {
        const u = new URL(uri);
        const req = https.request({ hostname: u.hostname, port: u.port || 443, path: u.pathname + u.search, method, headers, timeout: 30000 }, res => {
            let d = ''; res.on('data', c => d += c); res.on('end', () => { try { resolve({ status: res.statusCode, body: JSON.parse(d) }); } catch { resolve({ status: res.statusCode, body: { _raw: d } }); } });
        });
        req.on('error', reject); req.on('timeout', () => req.destroy(new Error('timeout')));
        if (body) req.write(body); req.end();
    });
}
async function getToken() {
    const c = creds();
    const form = Object.entries({ grant_type: 'client_credentials', client_id: c.CF_CLIENT_ID, client_secret: c.CF_CLIENT_SECRET, scope: c.CF_SCOPE })
        .map(([k, v]) => `${encodeURIComponent(k)}=${encodeURIComponent(v)}`).join('&');
    const r = await httpReq('POST', c.CF_TOKEN_URL, { 'Content-Type': 'application/x-www-form-urlencoded', 'Content-Length': Buffer.byteLength(form) }, form);
    if (r.status !== 200 || !r.body.access_token) throw new Error('token fail ' + r.status);
    return r.body.access_token;
}
async function fetchOriginal(token, serial) {
    const c = creds();
    const r = await httpReq('GET', `${c.CF_API_BASE}/api/v1/TestReportDataFiles/${encodeURIComponent(serial)}`, { Authorization: 'Bearer ' + token });
    if (r.status !== 200) return null;
    return r.body && r.body.Content ? r.body.Content : null;
}
// content-normalize: collapse whitespace per line; DROP rule lines (pure separators —
// runs of = ~ _ -) and blank lines. Rule lines carry no content and their
// presence/position is the deferred cosmetic gap (e.g. the leading === letterhead line
// the originals have and our renders omit), so removing them isolates real content.
function norm(s) {
    return s.replace(/\r/g, '').split('\n')
        .map(l => l.trim())
        .filter(t => t.length > 0 && !(/^[=~_\- ]+$/.test(t) && /[=~_\-]/.test(t)))
        .map(t => t.replace(/\s+/g, ' '));
}

(async () => {
    const tpl = JSON.parse(fs.readFileSync(TPL_PATH, 'utf8'));
    const models = (only.length ? only : Object.keys(tpl)).filter(m => tpl[m]);
    const token = await getToken();
    const pass = [], fail = [], noOracle = [], noRec = [];
    for (const m of models) {
        const sn = tpl[m]._srcSerial;
        if (!sn) { noOracle.push(m); continue; }
        const original = await fetchOriginal(token, sn);
        if (!original) { noOracle.push(m + '(no Hoffman ' + sn + ')'); continue; }
        const rec = await db.queryOne('SELECT * FROM test_records WHERE serial_number=$1 AND model_number=$2 LIMIT 1', [sn, m]);
        if (!rec) { noRec.push(m + '(' + sn + ')'); continue; }
        let rendered; try { rendered = renderContent(rec); } catch (e) { rendered = null; }
        if (!rendered) { fail.push({ m, sn, reason: 'render null' }); continue; }
        const a = norm(rendered), b = norm(original);
        let diff = -1; const mx = Math.max(a.length, b.length);
        for (let i = 0; i < mx; i++) { if (a[i] !== b[i]) { diff = i; break; } }
        if (diff === -1) pass.push(m);
        else fail.push({ m, sn, line: diff, render: a[diff], golden: b[diff] });
    }
    console.log('\n=== DSCA33/45 Hoffman validation ===');
    console.log('PASS (' + pass.length + '): ' + pass.join(', '));
    console.log('\nFAIL (' + fail.length + '):');
    for (const f of fail) {
        if (f.reason) { console.log('  ' + f.m + ' (' + f.sn + '): ' + f.reason); continue; }
        console.log('  ' + f.m + ' (' + f.sn + ') first diff L' + f.line);
        console.log('     render: ' + JSON.stringify(f.render));
        console.log('     golden: ' + JSON.stringify(f.golden));
    }
    if (noOracle.length) console.log('\nNO ORACLE: ' + noOracle.join(', '));
    if (noRec.length) console.log('NO DB REC: ' + noRec.join(', '));

    if (APPLY) {
        const passSet = new Set(pass);
        for (const m of Object.keys(tpl)) {
            if (passSet.has(m)) tpl[m].validated = true;
            else if (only.length === 0) delete tpl[m].validated; // full run: clear stale
        }
        fs.writeFileSync(TPL_PATH, JSON.stringify(tpl));
        console.log('\n[APPLY] marked validated on ' + pass.length + ' models in ' + TPL_PATH);
    } else {
        console.log('\n(dry run — pass --apply to mark validated)');
    }
    await db.close();
})().catch(e => { console.error('ERR', e.message, e.stack); process.exit(1); });