#!/usr/bin/env node

const fs = require('fs');
const path = require('path');

function readStdin() {
  return fs.readFileSync(0, 'utf8');
}

function isInside(parent, target) {
  const relative = path.relative(parent, target);
  return relative === '' || (!relative.startsWith('..') && !path.isAbsolute(relative));
}

function collectPathStrings(value, key = '', output = []) {
  if (value == null) {
    return output;
  }

  if (typeof value === 'string') {
    if (/path|file/i.test(key)) {
      output.push(value);
    }
    return output;
  }

  if (Array.isArray(value)) {
    value.forEach((item) => collectPathStrings(item, key, output));
    return output;
  }

  if (typeof value === 'object') {
    Object.entries(value).forEach(([childKey, childValue]) => {
      collectPathStrings(childValue, childKey, output);
    });
  }

  return output;
}

function resolveCandidate(candidate, rootDir) {
  const cleaned = String(candidate).trim().replace(/^["']|["']$/g, '');
  if (!cleaned) {
    return null;
  }

  return path.isAbsolute(cleaned)
    ? path.resolve(cleaned)
    : path.resolve(rootDir, cleaned);
}

try {
  const input = JSON.parse(readStdin() || '{}');
  if (input.tool_response && input.tool_response.error) {
    process.exit(0);
  }

  const projectDir = process.env.GEMINI_PROJECT_DIR || input.cwd || process.cwd();
  const wikiDir = path.resolve(projectDir, 'wiki');
  const outputDir = path.resolve(projectDir, 'output');
  const indexPath = path.resolve(wikiDir, 'index.md');
  const logPath = path.resolve(wikiDir, 'log.md');
  const candidates = collectPathStrings(input.tool_input || {});
  const targets = candidates
    .map((candidate) => resolveCandidate(candidate, projectDir))
    .filter(Boolean);

  const wikiTargets = targets.filter((target) => isInside(wikiDir, target));
  const outputTargets = targets.filter((target) => isInside(outputDir, target));

  if (wikiTargets.some((target) => target !== indexPath && target !== logPath)) {
    process.stdout.write(JSON.stringify({
      suppressOutput: true,
      hookSpecificOutput: {
        additionalContext:
          'wiki/ 페이지를 수정했다. 이 턴이 끝나기 전에 YAML frontmatter(title, tags, sources, created, updated), [[wikilink]], wiki/index.md 한 줄 항목, wiki/log.md 변경 기록이 모두 반영되었는지 확인하라.'
      }
    }));
    process.exit(0);
  }

  if (outputTargets.length > 0) {
    process.stdout.write(JSON.stringify({
      suppressOutput: true,
      hookSpecificOutput: {
        additionalContext:
          'output/ 결과물은 wiki/ 페이지에 근거해야 한다. 가능하면 사용한 핵심 wiki 페이지를 본문 또는 말미에 남기고, raw/ 직접 해석에 의존하지 마라.'
      }
    }));
  }
} catch (error) {
  process.stderr.write(String(error));
  process.exit(1);
}