const sharp = require("sharp");
var DEBUG = true;
var sizes = [650, 750, 850, 950, 1050];
/**
 * Multiple Resolution from one file....
 * @param source Soruce path of file
 * @param destination destination path of file
 * @param type type of image file e.g, (.jpg,.png..)
 */
export const generateThumb = (source: string, destination: string, type: string) => {
  (async () => {
    for (var i = 0; i < sizes.length; i++) {
      await sharp(source)
        .resize(sizes[i])
        .max()
        .toFile(destination + type)
       // .toFile(destination + Math.random() + "thumbnail" + sizes[i] + type)
        .then(async data => await DEBUG && console.log(data))
        .catch(err => DEBUG && console.log(err));
    }
  })();
};
/**
 * generate thumbnail with defining size
 * @param source Soruce path of file
 * @param destination destination path of file
 * @param sizes define size of width  in a pixel e.g,(500,600...)
 * @param type type of image file e.g, (.jpg,.png..)
 */
export const generateThumbwithsize = (source: string, destination: string,sizes:number, type: string) => {
  (async () => {
   await sharp(source)
        .resize(sizes)
        .max()
       // .toFile(destination + Math.random() + "generateThumbwithsize" + sizes + type)
        .toFile(destination  + type)
        .then(async data => await DEBUG && console.log(data))
        .catch(err => DEBUG && console.log(err));
  })();
};

/**
 * generate thumbnail with scaling size e.g,(0.1,0.2..)
 * @param source Soruce path of file
 * @param destination destination path of file
 * @param type type of image file e.g, (.jpg,.png..)
 * @param width difine width of image in a pixel e.g(500,600..)
 * @param height difine height of image in a pixel e.g(500,600..)
 * @param ratio define ration of image e.g, (0.1,0.2..)
 */


export const ScaleThumb = (source: string, destination: string, type: string, width: any, height: any, ratio: number) => {

  (async () => {
    const targetWidth = Math.ceil(width * ratio)
    const targetHeight = Math.ceil(height * ratio)
    await sharp(source)
      .resize(targetWidth, targetHeight)
     // .toFile(destination + "ScaleThumb" + width + height + type)
     .toFile(destination  + type)
      .then(async data => {
        await console.log(destination + "ScaleThumb" + width + height + type)
        DEBUG && console.log(data)
      })
      .catch(err => DEBUG && console.log(err));

  })();
};

/**
 * Crop thumbanail from coordinat e.g(top,left,width, height)
 * @param source Soruce path of file
 * @param destination destination path of file
 * @param type type of image file e.g, (.jpg,.png..)
 * @param top cropt thumbnail from top in a pixel e.g(100,50..)
 * @param left cropt thumbnail from left in a pixel e.g(100,50..)
 * @param width assign width of thumbnail e.g(100,50..)
 * @param height assign height of thumbnail e.g,(100,50..)
 */
export const cropthumbCoor = (source: string, destination: string, type: string, top: any,
  left: any, width: any, height: any) => {
  (async () => {
    const image = await sharp(source);
    image
      .metadata()
      .then(metadata => {
        DEBUG &&  console.log("cropthumbCoor", metadata);
        return image
          .extract({ left, top, width, height })
          //.toFile(destination + Math.random() + "Coordinatorcrop" + type);
          .toFile(destination  + type);
      })
      .then(async data => {
        await DEBUG && console.log("cropthumbCoor", data);
      });
  })();
};

/**
 * Resize file with height and width 
 * @param source Soruce path of file
 * @param destination destination path of file
 * @param type type of image file e.g, (.jpg,.png..)
 * @param height assign height of thumbnail e.g(100,50..)
 * @param width  assign width of thumbnail e.g,(100,50..)
 */
export const Resize = (source: string, destination: string, type: string, height: any,
  width: any) => {
  (async () => {
    await sharp(source)
      .resize(width, height)
       .max()
      .toFile(destination + type)
      .then(async data => await DEBUG && console.log("Resize", data))
      .catch(err => DEBUG && console.log(err));
  })();
};