const fs = require("fs");
const path = require("path");
const AdmZip = require("adm-zip");
const { resolveData, ensureDataDirs } = require("./paths");

function redact(value) {
  if (Array.isArray(value)) return value.map(redact);
  if (!value || typeof value !== "object") return value;
  const output = {};
  for (const [key, item] of Object.entries(value)) {
    output[key] = /token|secret|password|cookie|authorization|session/i.test(key) ? "[REDACTED]" : redact(item);
  }
  return output;
}
function createDiagnostic(input) {
  return redact({
    timestamp: new Date().toISOString(),
    severity: "error",
    can_retry: true,
    requires_admin_action: true,
    should_auto_resume: false,
    platform: process.platform,
    ...input
  });
}
function persistDiagnostic(input) {
  ensureDataDirs();
  const diagnostic = createDiagnostic(input);
  fs.writeFileSync(resolveData("diagnostics", "latest_runtime_diagnostic.json"), `${JSON.stringify(diagnostic, null, 2)}\n`);
  fs.appendFileSync(resolveData("diagnostics", "runtime_diagnostics.jsonl"), `${JSON.stringify(diagnostic)}\n`);
  return diagnostic;
}
function getLatestDiagnostic() {
  try { return JSON.parse(fs.readFileSync(resolveData("diagnostics", "latest_runtime_diagnostic.json"), "utf8")); }
  catch { return null; }
}
function createDiagnosticsBundle({ config, runtimeState, manifest, metrics }) {
  ensureDataDirs();
  const destination = resolveData("diagnostics", `lumi-ai-diagnostics-${Date.now()}.zip`);
  const zip = new AdmZip();
  const addJson = (name, value) => zip.addFile(name, Buffer.from(`${JSON.stringify(redact(value), null, 2)}\n`));
  addJson("config.json", config);
  addJson("runtime_state.json", runtimeState);
  addJson("latest_runtime_diagnostic.json", getLatestDiagnostic());
  addJson("runtime_manifest.json", manifest);
  addJson("metrics_summary.json", metrics);
  for (const name of ["runtime-selftest.log"]) {
    const file = resolveData("logs", name);
    if (fs.existsSync(file)) zip.addLocalFile(file, "logs");
  }
  const logs = fs.readdirSync(resolveData("logs")).filter((name) => name.startsWith("runtime-")).sort().slice(-2);
  for (const name of logs) zip.addLocalFile(resolveData("logs", name), "logs");
  zip.writeZip(destination);
  return destination;
}
function tail(value, length = 4000) { return String(value || "").slice(-length); }

module.exports = { redact, createDiagnostic, persistDiagnostic, getLatestDiagnostic, createDiagnosticsBundle, tail };