const fs = require("fs");

const VERBOSE = process.env.VERBOSE === "1" || process.env.VERBOSE === "true";

const CSV_FILE = process.env.CSV_FILE || "./uploads/sha1.csv";
const IMAGE_BASE_URL = process.env.IMAGE_BASE_URL || "https://placehold.co/";


function getImages() {
  if (VERBOSE) console.log(`[pictshare-browse] Loading CSV file from: ${CSV_FILE}`);
  if (!fs.existsSync(CSV_FILE)) {
    if (VERBOSE) console.warn(`[pictshare-browse] CSV file does not exist: ${CSV_FILE}`);
    return [];
  }

  const lines = fs.readFileSync(CSV_FILE, "utf-8").split("\n");
  if (VERBOSE) console.log(`[pictshare-browse] CSV file line count: ${lines.length}`);
  let skipped = 0;
  const images = lines
    .filter(line => line.includes(";"))
    .map(line => {
      const [hash, filename] = line.split(";");
      const folderPath = `./uploads/${filename.trim()}`;
      if (!fs.existsSync(folderPath) || !fs.lstatSync(folderPath).isDirectory()) {
        skipped++;
        if (VERBOSE) console.warn(`[pictshare-browse] Skipping: ${filename.trim()} (missing folder: ${folderPath})`);
        return null;
      }
      return {
        url: `${IMAGE_BASE_URL.replace(/\/$/, "")}/${filename.trim()}`,
        name: filename.trim(),
        hash: hash,
      };
    })
    .filter(Boolean);
  if (VERBOSE) console.log(`[pictshare-browse] Images loaded: ${images.length}, Skipped: ${skipped}`);
  return images;
}

module.exports = getImages;