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// hints are informational diagnostics (severity 3) and follow positional hints on / small / off directives.
// usage: node tests/drivers/hints_test.js path/to/zclsp
const assert = require('assert');
const cp = require('child_process');
const server = process.argv[2];
const frame = m => { const b = Buffer.from(JSON.stringify(m)); return Buffer.concat([Buffer.from('Content-Length: ' + b.length + '\r\n\r\n'), b]); };
function diagnostics(text) {
const uri = 'file:///hints.zc';
const input = Buffer.concat([
{ jsonrpc: '2.0', id: 1, method: 'initialize', params: {} },
{ jsonrpc: '2.0', method: 'textDocument/didOpen', params: { textDocument: { uri, version: 1, languageId: 'zc', text } } },
{ jsonrpc: '2.0', method: 'exit' }].map(frame));
const r = cp.spawnSync(server, process.argv.slice(3), { input, timeout: 20000, maxBuffer: 4 << 20 });
assert.strictEqual(r.status, 0, String(r.stderr));
let d = r.stdout, out = [];
while (d.length) {
const e = d.indexOf('\r\n\r\n'), n = Number(/Content-Length:\s*(\d+)/i.exec(d.subarray(0, e).toString())[1]);
const m = JSON.parse(d.subarray(e + 4, e + 4 + n)); d = d.subarray(e + 4 + n);
if (m.method === 'textDocument/publishDiagnostics') out = m.params.diagnostics;
}
return out;
}
const names = ds => ds.map(d => d.message.split(' ')[0]).sort().join(',');
const flow = 'fn main() {\n let a = 1;\n hints small;\n let b = 2;\n int c = 5 * 8;\n hints off;\n let d = 3;\n int k = 3 * 4;\n hints on;\n let e = 4;\n return 0;\n}\n';
const ds = diagnostics(flow);
assert.ok(ds.length > 0 && ds.every(d => d.severity === (d.range.start.line === 3 || d.range.start.line === 4 ? 4 : 3)), 'small uses compact severity 4; on uses informational severity 3: ' + JSON.stringify(ds));
assert.strictEqual(names(ds), 'a,b,c,e,multiplying', 'off suppresses hints; small retains them with compact markers');
const style = diagnostics('fn main() {\n int n = 1;\n n = n * 8;\n hints small;\n n = n * 16;\n return n;\n}\n');
assert.strictEqual(style.filter(d => /is a shift/.test(d.message)).length, 2, 'small retains style hints with compact markers');
assert.strictEqual(diagnostics('fn main() { int x = ; return 0; }').filter(d => d.severity === 1).length > 0, true);
console.log('ok hints are blue information diagnostics with positional on, small and off');
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