#!/usr/bin/env node
// scripts/quality/validate-release-green.mjs
//
// "Release-green" pre-flight validator (Solution C).
//
// WHY: the full gate (ci.yml — unit shards, vitest, ratchets, package-artifact)
// runs ONLY on the release PR (PR → main). PRs into release/** only get the
// fast-gates (quality.yml: TIA-impacted tests + typecheck + lint checks). So
// reds accumulate silently on the release branch and explode — in layers — at
// release time. This script reproduces the release-equivalent validation against
// the CURRENT working tree so the maintainer (or the nightly, Solution D) can see
// the real state of the release branch at any time.
//
// DESIGN — never blocking to contributors:
//   • HARD checks (typecheck, lint errors, db-rules, public-creds, docs-all,
//     unit, vitest, integration, optionally package-artifact) → a failure here is
//     a real defect; exit 1.
//   • DRIFT checks (eslint WARNINGS, cognitive-complexity, file-size, cyclomatic
//     complexity, dead-code, type-coverage, compression-budget, openapi-coverage,
//     workflow-lint/zizmor, codeql-ratchet) → ratchet drift accrued across the
//     cycle is NOT a contributor's fault; it is reported and rebaselined by the
//     maintainer at release. Drift NEVER changes the exit code, so wiring this as
//     a check can never block anyone on drift.
//
// COMPLETENESS: this mirrors the FULL release-PR gate set (quality-gate +
// quality-extended + docs-sync-strict + integration), not a subset — and reports
// EVERY red in one pass (the report is collected, not fail-fast), so the release
// PR is green on its first CI run instead of revealing reds in ~40-min layers. The
// only release-PR gates it cannot reproduce locally are GitHub-side CodeQL semantic
// analysis and SonarQube/SonarCloud (external services).
//
// This script DIAGNOSES + REPORTS only (no auto-fix). The fix-to-green
// orchestration lives in the /green-prs + review-prs flows that call it.
//
// Usage:
//   node scripts/quality/validate-release-green.mjs [--json] [--with-build] [--quick]
//     --json        emit machine-readable JSON to stdout (report goes to stderr)
//     --with-build  also run check:pack-artifact (needs a dist/ build — slow)
//     --quick       skip the slow unit + vitest + integration suites (drift + fast
//                   gates only)

import { execFileSync } from "node:child_process";
import { readFileSync } from "node:fs";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = dirname(fileURLToPath(import.meta.url));
const ROOT = join(__dirname, "..", "..");
const npmCmd = process.platform === "win32" ? "npm.cmd" : "npm";

// ─── Pure helpers (exported for tests) ──────────────────────────────────────

/** Read the committed ratchet baseline value for a metric (null if unknown). */
export function baselineValue(metric, root = ROOT) {
  try {
    const raw = JSON.parse(readFileSync(join(root, "config/quality/quality-baseline.json"), "utf8"));
    const metrics = raw.metrics || raw;
    const v = metrics?.[metric]?.value;
    return typeof v === "number" ? v : null;
  } catch {
    return null;
  }
}

/** Best-effort "first meaningful failure line" from captured command output. */
export function firstFailureLine(out) {
  const lines = String(out || "")
    .split("\n")
    .map((l) => l.trim())
    .filter(Boolean);
  const hit = lines.find((l) => /✖|not ok|AssertionError|error TS|FAIL|Error:|REGRESS/i.test(l));
  return (hit || lines[lines.length - 1] || "failed").slice(0, 200);
}

/** Sum {errorCount,warningCount} across an eslint --format json result array. */
export function eslintCounts(parsed) {
  let errors = 0;
  let warnings = 0;
  for (const f of parsed || []) {
    errors += f.errorCount || 0;
    warnings += f.warningCount || 0;
  }
  return { errors, warnings };
}

/** Parse the eslint JSON array out of mixed stdout (tolerates a leading banner). */
export function parseEslintJson(out) {
  const start = String(out || "").indexOf("[");
  if (start < 0) return null;
  try {
    return JSON.parse(String(out).slice(start));
  } catch {
    return null;
  }
}

/** Pull the cognitive-complexity violation count from the gate's output. */
export function parseCognitiveCount(out) {
  const m = String(out || "").match(/(\d+)\s+(?:function\(s\) exceed|violações|violations)/i);
  return m ? Number(m[1]) : null;
}

/**
 * Drift verdict for a ratchet: a metric that grew past its committed baseline is
 * "drift" (reported, never blocking). `direction:"down"` metrics (warnings,
 * complexity, file-size counts) regress when current > baseline.
 */
export function isDrift(current, baseline) {
  if (typeof current !== "number" || typeof baseline !== "number") return false;
  return current > baseline;
}

/** releaseGreen iff there are zero failing HARD checks (drift never blocks). */
export function computeVerdict(results) {
  const hardFailures = results.filter((r) => r.kind === "hard" && !r.ok);
  const drift = results.filter((r) => r.kind === "drift" && !r.ok);
  return { releaseGreen: hardFailures.length === 0, hardFailures, drift };
}

// ─── Orchestration (only when run directly) ─────────────────────────────────

function run(cmd, cmdArgs) {
  try {
    const out = execFileSync(cmd, cmdArgs, {
      cwd: ROOT,
      encoding: "utf8",
      stdio: ["ignore", "pipe", "pipe"],
      maxBuffer: 256 * 1024 * 1024,
      env: { ...process.env, FORCE_COLOR: "0" },
    });
    return { code: 0, out };
  } catch (err) {
    return {
      code: typeof err.status === "number" ? err.status : 1,
      out: `${err.stdout || ""}${err.stderr || ""}`,
    };
  }
}

function main() {
  const args = new Set(process.argv.slice(2));
  const JSON_OUT = args.has("--json");
  const WITH_BUILD = args.has("--with-build");
  const QUICK = args.has("--quick");

  const results = [];
  const record = (r) => {
    results.push(r);
    const icon = r.ok ? "✅" : r.kind === "drift" ? "🟡" : "❌";
    process.stderr.write(`${icon} [${r.kind}] ${r.label}${r.detail ? ` — ${r.detail}` : ""}\n`);
  };

  const hardCmd = (id, label, cmd, cmdArgs) => {
    const { code, out } = run(cmd, cmdArgs);
    record({ id, label, kind: "hard", ok: code === 0, detail: code === 0 ? "pass" : firstFailureLine(out) });
  };

  // A ratchet command (check:complexity, check:dead-code, …) exits 1 ONLY on a
  // measured regression and self-skips (exit 0) when its tooling is absent — so a
  // non-zero exit here is drift to rebaseline at release, never a contributor block.
  // ALL checks run regardless of earlier failures (the report is collected, not
  // fail-fast) so one pass surfaces every red instead of revealing them in layers.
  const driftCmd = (id, label, cmd, cmdArgs, okDetail = "within baseline") => {
    const { code, out } = run(cmd, cmdArgs);
    record({ id, label, kind: "drift", ok: code === 0, detail: code === 0 ? okDetail : firstFailureLine(out) });
  };

  process.stderr.write("🔎 Release-green validation (current working tree)\n\n");

  hardCmd("typecheck", "Typecheck (core)", npmCmd, ["run", "typecheck:core"]);

  // ESLint: ONE pass → errors (hard) + warnings (drift)
  {
    const { out } = run("npx", ["eslint", ".", "--format", "json"]);
    const parsed = parseEslintJson(out);
    if (!parsed) {
      record({ id: "lint", label: "ESLint", kind: "hard", ok: false, detail: "could not parse eslint json" });
    } else {
      const { errors, warnings } = eslintCounts(parsed);
      record({ id: "lint-errors", label: "ESLint errors", kind: "hard", ok: errors === 0, detail: `${errors} error(s)` });
      const base = baselineValue("eslintWarnings");
      const over = isDrift(warnings, base);
      record({
        id: "eslint-warnings",
        label: "ESLint warnings (ratchet)",
        kind: "drift",
        ok: !over,
        detail:
          base == null
            ? `${warnings} (no baseline)`
            : `${warnings} vs baseline ${base}${over ? ` (+${warnings - base} drift → rebaseline at release)` : ""}`,
      });
    }
  }

  hardCmd("db-rules", "DB rules", npmCmd, ["run", "check:db-rules"]);
  hardCmd("public-creds", "Public creds", npmCmd, ["run", "check:public-creds"]);

  // Cognitive-complexity (drift)
  {
    const { out } = run(npmCmd, ["run", "check:cognitive-complexity"]);
    const current = parseCognitiveCount(out);
    const base = baselineValue("cognitiveComplexity");
    const over = isDrift(current, base);
    record({
      id: "cognitive-complexity",
      label: "Cognitive complexity (ratchet)",
      kind: "drift",
      ok: !over,
      detail:
        current == null
          ? "could not parse count"
          : `${current} vs baseline ${base}${over ? ` (+${current - base} drift → rebaseline at release)` : ""}`,
    });
  }

  // file-size (drift)
  {
    const { code, out } = run(npmCmd, ["run", "check:file-size"]);
    record({
      id: "file-size",
      label: "File-size ratchet",
      kind: "drift",
      ok: code === 0,
      detail: code === 0 ? "within frozen caps" : firstFailureLine(out),
    });
  }

  // Remaining quality-gate / quality-extended ratchets that the PR→release
  // fast-gates skip and that historically surfaced — one at a time, because the
  // CI Quality Ratchet job is fail-fast — only on the release PR. Running them all
  // here (drift, never blocking) means a single rebaseline pass at release.
  driftCmd("complexity", "Cyclomatic complexity (ratchet)", npmCmd, ["run", "check:complexity"]);
  driftCmd("dead-code", "Dead-code (ratchet)", npmCmd, ["run", "check:dead-code"]);
  driftCmd("type-coverage", "Type coverage (ratchet)", npmCmd, ["run", "check:type-coverage"]);
  driftCmd("compression-budget", "Compression budget (ratchet)", npmCmd, ["run", "check:compression-budget"]);
  driftCmd("openapi-coverage", "OpenAPI route coverage (ratchet)", npmCmd, ["run", "check:openapi-coverage"]);
  driftCmd("workflow-lint", "Workflow lint (zizmor ratchet)", npmCmd, ["run", "check:workflows", "--", "--ratchet"]);
  driftCmd("codeql-ratchet", "CodeQL alerts (ratchet)", npmCmd, ["run", "check:codeql-ratchet"]);

  // Docs sync + fabricated-docs (strict) is a real-defect gate (invented env vars /
  // routes, i18n mirror drift) — HARD.
  hardCmd("docs-all", "Docs sync + fabricated-docs (strict)", npmCmd, ["run", "check:docs-all"]);

  if (!QUICK) {
    hardCmd("unit", "Unit tests (full, CI concurrency)", npmCmd, ["run", "test:unit:ci"]);
    hardCmd("vitest", "Vitest (MCP / autoCombo / cache)", npmCmd, ["run", "test:vitest"]);
    // Integration tests run ONLY on the release PR full CI (PR→main), so an assertion
    // regression here (e.g. a contributor flipping a Codex fingerprint key order) is
    // invisible until release — run them in the pre-flight as a HARD gate.
    hardCmd("integration", "Integration tests", npmCmd, ["run", "test:integration"]);
  }
  if (WITH_BUILD) {
    hardCmd("pack-artifact", "Package artifact (npm pack policy)", npmCmd, ["run", "check:pack-artifact"]);
  }

  const { releaseGreen, hardFailures, drift } = computeVerdict(results);

  process.stderr.write("\n──────── verdict ────────\n");
  process.stderr.write(`HARD failures (block — real defects): ${hardFailures.length}\n`);
  hardFailures.forEach((r) => process.stderr.write(`  ❌ ${r.label}: ${r.detail}\n`));
  process.stderr.write(`Ratchet drift (non-blocking — rebaseline at release): ${drift.length}\n`);
  drift.forEach((r) => process.stderr.write(`  🟡 ${r.label}: ${r.detail}\n`));
  process.stderr.write(
    releaseGreen
      ? "\n✅ RELEASE-GREEN (no hard failures). Any drift above is rebaselined at release, not a contributor concern.\n"
      : "\n❌ NOT release-green — hard failures must be fixed (in the originating PR branch, via co-authorship).\n"
  );

  if (JSON_OUT) {
    process.stdout.write(
      JSON.stringify(
        {
          releaseGreen,
          hardFailures: hardFailures.map((r) => ({ id: r.id, label: r.label, detail: r.detail })),
          drift: drift.map((r) => ({ id: r.id, label: r.label, detail: r.detail })),
          checks: results.map((r) => ({ id: r.id, kind: r.kind, ok: r.ok, detail: r.detail })),
        },
        null,
        2
      ) + "\n"
    );
  }

  process.exit(releaseGreen ? 0 : 1);
}

// Run only when invoked directly (so tests can import the pure helpers).
if (process.argv[1] && fileURLToPath(import.meta.url) === process.argv[1]) {
  main();
}