const fs = require('fs');
const path = require('path');
const yaml = require('js-yaml');

// Content directory: prioritize ENV var, then /app/content (in K8s), fallback to ./sample-content
function resolveContentDir() {
  if (process.env.CONTENT_DIR && fs.existsSync(process.env.CONTENT_DIR)) {
    return path.resolve(process.env.CONTENT_DIR);
  }
  if (fs.existsSync('/app/content')) {
    return '/app/content';
  }
  return path.resolve(__dirname, '../sample-content');
}

const CONTENT_DIR = resolveContentDir();

function loadSiteConfig() {
  const configPath = path.join(CONTENT_DIR, 'config.yaml');
  const defaults = {
    site: {
      title: "Pengzhan",
      tagline: "Was childish, Now foolish",
      url: "https://pengzhan.dev",
      author: {
        name: "Pengzhan Hao",
        subtitle: "Software engineer on Cloud",
        gravatar: ""
      }
    },
    navigation: [
      { label: "Home", path: "/" },
      { label: "Blogs", path: "/blogs" },
      { label: "Search", path: "/search" },
      { label: "Quick Links", path: "/quick-links" }
    ],
    social: [
      { platform: "github", url: "https://github.com/CoderSherlock" },
      { platform: "instagram", url: "https://www.instagram.com/pengzhan.hao/" },
      { platform: "linkedin", url: "https://www.linkedin.com/in/pengzhanhao/" },
      { platform: "email", address: "contact@pengzhan.dev" }
    ],
    search: {
      recommended: []
    },
    plugins: {}
  };

  if (fs.existsSync(configPath)) {
    try {
      const fileContent = fs.readFileSync(configPath, 'utf8');
      const parsed = yaml.load(fileContent);
      return { ...defaults, ...parsed };
    } catch (err) {
      console.error(`[Config] Error loading ${configPath}:`, err);
    }
  }
  return defaults;
}

module.exports = {
  CONTENT_DIR,
  loadSiteConfig
};