'use strict';

var fs = require('fs');

var async = require('async');
var assert = require('assert');
var Benchmark = require('benchmark');
var semver = require('semver');

// Contenders
var gm = require('gm');
var imagemagick = require('imagemagick');
var sharp = require('../../index');
var imagemagickNative;
try {
  imagemagickNative = require('imagemagick-native');
} catch (err) {
  console.log('Excluding imagemagick-native');
}
var lwip;
try {
  lwip = require('lwip');
} catch (err) {
  console.log('Excluding lwip');
}

var fixtures = require('../fixtures');

var width = 720;
var height = 480;

// Approximately equivalent to fast bilinear
var magickFilter = 'Triangle';

// Disable libvips cache to ensure tests are as fair as they can be
sharp.cache(0);

async.series({
  jpeg: function(callback) {
    var inputJpgBuffer = fs.readFileSync(fixtures.inputJpg);
    var jpegSuite = new Benchmark.Suite('jpeg');
    // lwip
    if (typeof lwip !== 'undefined') {
      jpegSuite.add('lwip-file-file', {
        defer: true,
        fn: function(deferred) {
          lwip.open(fixtures.inputJpg, function (err, image) {
            if (err) {
              throw err;
            }
            image.resize(width, height, 'linear', function (err, image) {
              if (err) {
                throw err;
              }
              image.writeFile(fixtures.outputJpg, {quality: 80}, function (err) {
                if (err) {
                  throw err;
                }
                deferred.resolve();
              });
            });
          });
        }
      }).add('lwip-buffer-buffer', {
        defer: true,
        fn: function(deferred) {
          lwip.open(inputJpgBuffer, 'jpg', function (err, image) {
            if (err) {
              throw err;
            }
            image.resize(width, height, 'linear', function (err, image) {
              if (err) {
                throw err;
              }
              image.toBuffer('jpg', {quality: 80}, function (err, buffer) {
                if (err) {
                  throw err;
                }
                assert.notStrictEqual(null, buffer);
                deferred.resolve();
              });
            });
          });
        }
      });
    }
    // imagemagick
    jpegSuite.add('imagemagick-file-file', {
      defer: true,
      fn: function(deferred) {
        imagemagick.resize({
          srcPath: fixtures.inputJpg,
          dstPath: fixtures.outputJpg,
          quality: 0.8,
          width: width,
          height: height,
          format: 'jpg',
          filter: magickFilter
        }, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    });
    // imagemagick-native
    if (typeof imagemagickNative !== 'undefined') {
      jpegSuite.add('imagemagick-native-buffer-buffer', {
        defer: true,
        fn: function(deferred) {
          imagemagickNative.convert({
            srcData: inputJpgBuffer,
            quality: 80,
            width: width,
            height: height,
            format: 'JPEG',
            filter: magickFilter
          }, function (err, buffer) {
            if (err) {
              throw err;
            } else {
              assert.notStrictEqual(null, buffer);
              deferred.resolve();
            }
          });
        }
      });
    }
    // gm
    jpegSuite.add('gm-buffer-file', {
      defer: true,
      fn: function(deferred) {
        gm(inputJpgBuffer)
          .resize(width, height)
          .filter(magickFilter)
          .quality(80)
          .write(fixtures.outputJpg, function (err) {
            if (err) {
              throw err;
            } else {
              deferred.resolve();
            }
          });
      }
    }).add('gm-buffer-buffer', {
      defer: true,
      fn: function(deferred) {
        gm(inputJpgBuffer)
          .resize(width, height)
          .filter(magickFilter)
          .quality(80)
          .toBuffer(function (err, buffer) {
            if (err) {
              throw err;
            } else {
              assert.notStrictEqual(null, buffer);
              deferred.resolve();
            }
          });
      }
    }).add('gm-file-file', {
      defer: true,
      fn: function(deferred) {
        gm(fixtures.inputJpg)
          .resize(width, height)
          .filter(magickFilter)
          .quality(80)
          .write(fixtures.outputJpg, function (err) {
            if (err) {
              throw err;
            } else {
              deferred.resolve();
            }
          });
      }
    }).add('gm-file-buffer', {
      defer: true,
      fn: function(deferred) {
        gm(fixtures.inputJpg)
          .resize(width, height)
          .filter(magickFilter)
          .quality(80)
          .toBuffer(function (err, buffer) {
            if (err) {
              throw err;
            } else {
              assert.notStrictEqual(null, buffer);
              deferred.resolve();
            }
          });
      }
    });
    // sharp
    jpegSuite.add('sharp-buffer-file', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).toFile(fixtures.outputJpg, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    }).add('sharp-buffer-buffer', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-file-file', {
      defer: true,
      fn: function(deferred) {
        sharp(fixtures.inputJpg).resize(width, height).toFile(fixtures.outputJpg, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    }).add('sharp-stream-stream', {
      defer: true,
      fn: function(deferred) {
        var readable = fs.createReadStream(fixtures.inputJpg);
        var writable = fs.createWriteStream(fixtures.outputJpg);
        writable.on('finish', function() {
          deferred.resolve();
        });
        var pipeline = sharp().resize(width, height);
        readable.pipe(pipeline).pipe(writable);
      }
    }).add('sharp-file-buffer', {
      defer: true,
      fn: function(deferred) {
        sharp(fixtures.inputJpg).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-promise', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).toBuffer().then(function(buffer) {
          assert.notStrictEqual(null, buffer);
          deferred.resolve();
        });
      }
    }).add('sharp-sharpen-mild', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).sharpen().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-sharpen-radius', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).sharpen(3, 1, 3).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-blur-mild', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).blur().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-blur-radius', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).blur(3).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-nearest-neighbour', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).interpolateWith(sharp.interpolator.nearest).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-bicubic', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).interpolateWith(sharp.interpolator.bicubic).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-nohalo', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).interpolateWith(sharp.interpolator.nohalo).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-locallyBoundedBicubic', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).interpolateWith(sharp.interpolator.locallyBoundedBicubic).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-vertexSplitQuadraticBasisSpline', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).interpolateWith(sharp.interpolator.vertexSplitQuadraticBasisSpline).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-gamma', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).gamma().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-normalise', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).normalise().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-greyscale', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).greyscale().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-greyscale-gamma', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).gamma().greyscale().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-progressive', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).progressive().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-without-chroma-subsampling', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).withoutChromaSubsampling().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-rotate', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).rotate(90).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-sequentialRead', {
      defer: true,
      fn: function(deferred) {
        sharp(inputJpgBuffer).resize(width, height).sequentialRead().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).on('cycle', function(event) {
      console.log('jpeg ' + String(event.target));
    }).on('complete', function() {
      callback(null, this.filter('fastest').pluck('name'));
    }).run();
  },
  png: function(callback) {
    var inputPngBuffer = fs.readFileSync(fixtures.inputPng);
    var pngSuite = new Benchmark.Suite('png');
    // lwip
    if (typeof lwip !== 'undefined') {
      pngSuite.add('lwip-buffer-buffer', {
        defer: true,
        fn: function(deferred) {
          lwip.open(inputPngBuffer, 'png', function (err, image) {
            if (err) {
              throw err;
            }
            image.resize(width, height, 'linear', function (err, image) {
              if (err) {
                throw err;
              }
              image.toBuffer('png', function (err, buffer) {
                if (err) {
                  throw err;
                }
                assert.notStrictEqual(null, buffer);
                deferred.resolve();
              });
            });
          });
        }
      });
    }
    // imagemagick
    pngSuite.add('imagemagick-file-file', {
      defer: true,
      fn: function(deferred) {
        imagemagick.resize({
          srcPath: fixtures.inputPng,
          dstPath: fixtures.outputPng,
          width: width,
          height: height,
          filter: magickFilter
        }, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    });
    // imagemagick-native
    if (typeof imagemagickNative !== 'undefined') {
      pngSuite.add('imagemagick-native-buffer-buffer', {
        defer: true,
        fn: function(deferred) {
          imagemagickNative.convert({
            srcData: inputPngBuffer,
            width: width,
            height: height,
            format: 'PNG',
            filter: magickFilter
          });
          deferred.resolve();
        }
      });
    }
    // gm
    pngSuite.add('gm-file-file', {
      defer: true,
      fn: function(deferred) {
        gm(fixtures.inputPng)
          .resize(width, height)
          .filter(magickFilter)
          .write(fixtures.outputPng, function (err) {
            if (err) {
              throw err;
            } else {
              deferred.resolve();
            }
          });
      }
    }).add('gm-file-buffer', {
      defer: true,
      fn: function(deferred) {
        gm(fixtures.inputPng)
          .resize(width, height)
          .filter(magickFilter)
          .toBuffer(function (err, buffer) {
            if (err) {
              throw err;
            } else {
              assert.notStrictEqual(null, buffer);
              deferred.resolve();
            }
          });
      }
    });
    // sharp
    pngSuite.add('sharp-buffer-file', {
      defer: true,
      fn: function(deferred) {
        sharp(inputPngBuffer).resize(width, height).toFile(fixtures.outputPng, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    }).add('sharp-buffer-buffer', {
      defer: true,
      fn: function(deferred) {
        sharp(inputPngBuffer).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-file-file', {
      defer: true,
      fn: function(deferred) {
        sharp(fixtures.inputPng).resize(width, height).toFile(fixtures.outputPng, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    }).add('sharp-file-buffer', {
      defer: true,
      fn: function(deferred) {
        sharp(fixtures.inputPng).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-progressive', {
      defer: true,
      fn: function(deferred) {
        sharp(inputPngBuffer).resize(width, height).progressive().toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    });
    if (semver.gte(sharp.libvipsVersion(), '7.41.0')) {
      pngSuite.add('sharp-withoutAdaptiveFiltering', {
        defer: true,
        fn: function(deferred) {
          sharp(inputPngBuffer).resize(width, height).withoutAdaptiveFiltering().toBuffer(function(err, buffer) {
            if (err) {
              throw err;
            } else {
              assert.notStrictEqual(null, buffer);
              deferred.resolve();
            }
          });
        }
      });
    }
    pngSuite.on('cycle', function(event) {
      console.log(' png ' + String(event.target));
    }).on('complete', function() {
      callback(null, this.filter('fastest').pluck('name'));
    }).run();
  },
  webp: function(callback) {
    var inputWebPBuffer = fs.readFileSync(fixtures.inputWebP);
    (new Benchmark.Suite('webp')).add('sharp-buffer-file', {
      defer: true,
      fn: function(deferred) {
        sharp(inputWebPBuffer).resize(width, height).toFile(fixtures.outputWebP, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    }).add('sharp-buffer-buffer', {
      defer: true,
      fn: function(deferred) {
        sharp(inputWebPBuffer).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).add('sharp-file-file', {
      defer: true,
      fn: function(deferred) {
        sharp(fixtures.inputWebP).resize(width, height).toFile(fixtures.outputWebP, function(err) {
          if (err) {
            throw err;
          } else {
            deferred.resolve();
          }
        });
      }
    }).add('sharp-file-buffer', {
      defer: true,
      fn: function(deferred) {
        sharp(fixtures.inputWebp).resize(width, height).toBuffer(function(err, buffer) {
          if (err) {
            throw err;
          } else {
            assert.notStrictEqual(null, buffer);
            deferred.resolve();
          }
        });
      }
    }).on('cycle', function(event) {
      console.log('webp ' + String(event.target));
    }).on('complete', function() {
      callback(null, this.filter('fastest').pluck('name'));
    }).run();
  }
}, function(err, results) {
  assert(!err, err);
  Object.keys(results).forEach(function(format) {
    if (results[format].toString().substr(0, 5) !== 'sharp') {
      console.log('sharp was slower than ' + results[format] + ' for ' + format);
    }
  });
  console.dir(sharp.cache());
});