const fs = require('fs');
const path = require('path');
const ExifReader = require('exifreader');
const sharp = require('sharp');

var productsDatabase = { photos: []}
var i = 1;
var s = 0;
//console.log("start search");
async function searchFile(dir, fileExt) {
  s++;
  // read the contents of the directory
  const files = fs.readdirSync(dir);

  // search through the files
  for (let k = 0; k < files.length; k++) {
    file = files[k];
    const filePath = path.join(dir, file);

    // get the file stats
    const fileStat = fs.statSync(filePath);
    // if the file is a directory, recursively search the directory
    if (fileStat.isDirectory()) {
      await searchFile(filePath, fileExt);
    } else if (path.extname(file).toLowerCase() == fileExt) {
      // if the file is a match, print it
      var dd = dir.split("/");
      var d = dd.slice(1);
      var d1 = dd.slice(1);
      d1[1]= "thumbs";
      var ff = file.split(".");
      var fn = ff.slice(0,-1).join(".");
      var f1 = fn+'_min'+'.'+ff.at(-1);
      var f2 = fn+'_avg'+'.'+ff.at(-1);
      var f3 = fn+'_sharp'+'.'+ff.at(-1);
      var extFilePath = path.join(d.join("/"),file);
      var extThumbMinPath = path.join(d1.join("/"),f1);
      var extThumbAvgPath = path.join(d1.join("/"),f2);
      var extThumbSharpPath = path.join("public",d1.join("/"),f3);
      var thumbMinPath = path.join("public",extThumbMinPath);
      var thumbAvgPath = path.join("public",extThumbAvgPath);
      var dt = path.join("public",d1.join("/"));
      if (!fs.existsSync(dt)){
         fs.mkdirSync(dt, { recursive: true });
      }
      var data;
      try {
         data = fs.readFileSync(filePath);
      } catch (err) {
         //console.error(err);
      }
      const tags = await ExifReader.load(filePath, {expanded: true});
      //console.log(tags);
      var time = tags.exif.DateTimeOriginal;
      if (time === undefined){} else {time=time.value[0]}
      var gps = tags['gps'];
      //if (time === undefined ){console.log(filePath)}
      //console.log("read: "+filePath);
      await sharp(data)
        .resize(100,100,"inside")
        .withMetadata()
        .toFile(thumbMinPath, (err, info) => {});
      await sharp(data)
        .resize(400)
        .withMetadata()
        .toFile(thumbAvgPath, (err, info) => {});
      //console.log(pub);
      productsDatabase.photos.push({
        id: i,
        name: file,
        path: extFilePath,
        thub1: extThumbMinPath,
        thub2: extThumbAvgPath,
        gps: tags['gps'],
        data: time
      });
      i++;
    } 
    if(k == files.length-1) {
       if (s == 1) {
        fs.writeFileSync("api_v1/db.json", JSON.stringify(productsDatabase)); 
        //console.log("finito");   
        //console.log(productsDatabase); 
       } else {
         s--;
       }
       
    }
  }

}

async function thumb(filePath, opt){
  try {
    const thumbnail = await imageThumbnail(filePath, opt);
    //console.log(thumbnail);
    return thumbnail;
  } catch (err) {
    //console.error(err);
  }
} 
// start the search in the current directory
async function run(){
   await searchFile('./public/photos/original', '.jpg');
   //console.log(JSON.stringify(productsDatabase))
}

run()