#!/usr/bin/env -S node --import tsx
/**
 * scan-console.ts
 *
 * Inventory of all `console.*` calls in server-code paths.
 *
 * Generates docs/observability/console-migration-inventory.md as a Markdown
 * table with file:line + snippet for every match outside of test/spec files
 * and outside of explicit `// eslint-disable-next-line no-console` lines.
 *
 * Usage:
 *   pnpm exec tsx scripts/observability/scan-console.ts
 *   pnpm exec tsx scripts/observability/scan-console.ts --check   # exits 1 if hits > 0
 *
 * Server paths scanned:
 *   - apps/api/src/**
 *   - apps/worker/src/**
 *   - apps/web/app/**\/*.server.ts(x)
 *   - apps/web/app/**\/*.server.ts (modules)
 *   - apps/web/app/modules/**\/services/**
 *   - apps/web/app/utils/**
 *   - packages/*\/src/**
 *
 * Skipped:
 *   - **\/*.test.ts(x), **\/*.spec.ts(x)
 *   - lines preceded by `// eslint-disable-next-line no-console`
 *   - dist/, build/, node_modules/
 */
import { execSync } from "node:child_process";
import { readFileSync, writeFileSync, mkdirSync } from "node:fs";
import { dirname, relative, resolve } from "node:path";
import { fileURLToPath } from "node:url";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const REPO_ROOT = resolve(__dirname, "..", "..");
const OUTPUT = resolve(REPO_ROOT, "docs/observability/console-migration-inventory.md");

const SERVER_GLOBS: string[] = ["apps/api/src", "apps/worker/src", "apps/web/app", "packages"];

const CONSOLE_RE = /console\.(log|error|warn|info|debug|dir|trace)\s*\(/;
const TEST_FILE_RE = /\.(test|spec)\.(ts|tsx|js|jsx|mjs|cjs)$/;
const DISTLIKE_RE = /(^|\/)(node_modules|dist|build|coverage|\.react-router|generated)(\/|$)/;
const SERVER_FILE_RE =
  /(\.server\.tsx?|\/\.server\/|apps\/api\/src\/|apps\/worker\/src\/|packages\/[^/]+\/src\/|apps\/web\/app\/utils\/|apps\/web\/app\/modules\/[^/]+\/services\/|apps\/web\/app\/modules\/[^/]+\/db\/|apps\/web\/app\/routes\/.+\.server\.tsx?)/;

interface Hit {
  file: string;
  line: number;
  level: string;
  snippet: string;
}

function gitTrackedFiles(): string[] {
  const out = execSync("git ls-files", { cwd: REPO_ROOT, encoding: "utf8", maxBuffer: 32 * 1024 * 1024 });
  return out.split("\n").filter(Boolean);
}

function isServerPath(file: string): boolean {
  if (DISTLIKE_RE.test(file)) return false;
  if (TEST_FILE_RE.test(file)) return false;
  if (!SERVER_GLOBS.some((g) => file.startsWith(g + "/"))) return false;
  // Within apps/web/app: only `.server.ts(x)` files and explicit server folders
  if (file.startsWith("apps/web/app/")) {
    return SERVER_FILE_RE.test(file);
  }
  // apps/api/src, apps/worker/src, packages/*/src are entirely server code
  return /\.(ts|tsx|mjs|cjs|js)$/.test(file);
}

function scanFile(absPath: string, relPath: string): Hit[] {
  let content: string;
  try {
    content = readFileSync(absPath, "utf8");
  } catch {
    return [];
  }
  const hits: Hit[] = [];
  const lines = content.split("\n");
  for (let i = 0; i < lines.length; i++) {
    const line = lines[i];
    const m = line.match(CONSOLE_RE);
    if (!m) continue;
    // Skip if line is inside a block comment-only context — too expensive to AST.
    // Skip if line is a single-line comment (//) preceding the console call.
    const trimmed = line.trimStart();
    if (trimmed.startsWith("//") || trimmed.startsWith("*")) continue;
    // Skip if previous line is eslint-disable-next-line no-console
    const prev = i > 0 ? lines[i - 1].trim() : "";
    if (/eslint-disable-next-line[^\n]*no-console/.test(prev)) continue;
    // Skip same-line disable
    if (/eslint-disable-line[^\n]*no-console/.test(line)) continue;
    hits.push({
      file: relPath,
      line: i + 1,
      level: m[1],
      snippet: line.trim().slice(0, 160),
    });
  }
  return hits;
}

function main(): void {
  const args = process.argv.slice(2);
  const checkMode = args.includes("--check");

  const files = gitTrackedFiles().filter(isServerPath);
  const allHits: Hit[] = [];
  for (const rel of files) {
    const abs = resolve(REPO_ROOT, rel);
    allHits.push(...scanFile(abs, rel));
  }

  // Group by file for output
  const byFile = new Map<string, Hit[]>();
  for (const h of allHits) {
    const arr = byFile.get(h.file) ?? [];
    arr.push(h);
    byFile.set(h.file, arr);
  }
  const sortedFiles = [...byFile.keys()].sort();

  const now = new Date().toISOString();
  const lines: string[] = [];
  lines.push("# Console-Call Migration Inventory");
  lines.push("");
  lines.push(`> Generated by \`scripts/observability/scan-console.ts\` on ${now}.`);
  lines.push("> Re-run with: \`pnpm exec tsx scripts/observability/scan-console.ts\`");
  lines.push("");
  lines.push(`**Total \`console.*\` hits in server-code paths: ${allHits.length}**`);
  lines.push(`**Unique files: ${sortedFiles.length}**`);
  lines.push("");
  lines.push("Server-paths scanned:");
  lines.push("");
  lines.push("- `apps/api/src/**`");
  lines.push("- `apps/worker/src/**`");
  lines.push("- `apps/web/app/**/*.server.ts(x)` and `apps/web/app/modules/*/services/**` and `apps/web/app/utils/**`");
  lines.push("- `packages/*/src/**`");
  lines.push("");
  lines.push("Excluded:");
  lines.push("");
  lines.push("- `**/*.test.ts(x)`, `**/*.spec.ts(x)`");
  lines.push("- Lines after `// eslint-disable-next-line no-console`");
  lines.push("- `dist/`, `build/`, `coverage/`, `node_modules/`, `.react-router/`, `generated/`");
  lines.push("");
  if (allHits.length === 0) {
    lines.push("## All clear");
    lines.push("");
    lines.push("No `console.*` calls remain in server-code paths. The ESLint rule `no-console: error` enforces this going forward.");
  } else {
    lines.push("## Hits by file");
    lines.push("");
    lines.push("| File | Line | Level | Snippet |");
    lines.push("|------|-----:|-------|---------|");
    for (const file of sortedFiles) {
      for (const h of byFile.get(file)!) {
        const snippetEscaped = h.snippet.replace(/\|/g, "\\|").replace(/`/g, "\\`");
        lines.push(`| \`${h.file}\` | ${h.line} | ${h.level} | \`${snippetEscaped}\` |`);
      }
    }
    lines.push("");
    lines.push("## Summary by file");
    lines.push("");
    lines.push("| File | Hits |");
    lines.push("|------|-----:|");
    for (const file of sortedFiles) {
      lines.push(`| \`${file}\` | ${byFile.get(file)!.length} |`);
    }
  }

  mkdirSync(dirname(OUTPUT), { recursive: true });
  writeFileSync(OUTPUT, lines.join("\n") + "\n", "utf8");
  // eslint-disable-next-line no-console
  console.log(`scan-console: ${allHits.length} hit(s) across ${sortedFiles.length} file(s). Wrote ${relative(REPO_ROOT, OUTPUT)}`);

  if (checkMode && allHits.length > 0) {
    process.exit(1);
  }
}

main();