/* IMPORT */

const fs = require ( 'fs' ),
      os = require ( 'os' ),
      path = require ( 'path' ),
      delay = require ( 'promise-resolve-timeout' ),
      writeFileAtomic = require ( 'write-file-atomic' ),
      {writeFile, writeFileSync} = require ( '../dist' );

/* BENCHMARK */

const TEMP = os.tmpdir (),
      DST = i => path.join ( TEMP, `atomically-temp-${i}.txt` ),
      ITERATIONS = 250;

const runSingleAsync = async ( name, fn, buffer, options ) => {
  console.time ( name );
  for ( let i = 0; i < ITERATIONS; i++ ) {
    await fn ( DST ( i ), buffer, options );
  }
  console.timeEnd ( name );
  await delay ( 1000 );
};

const runSingleSync = async ( name, fn, buffer, options ) => {
  console.time ( name );
  for ( let i = 0; i < ITERATIONS; i++ ) {
    fn ( DST ( i ), buffer, options );
  }
  console.timeEnd ( name );
  await delay ( 1000 );
};

const runAllDummy = () => { // Preparation run
  runSingleSync ( 'dummy', fs.writeFileSync, '' );
};

const runAllAsync = async ( name, buffer ) => {
  await runSingleAsync ( `${name} -> async -> write-file-atomic`, writeFileAtomic, buffer );
  await runSingleAsync ( `${name} -> async -> write-file-atomic (fastest)`, writeFileAtomic, buffer, { fsync: false } );
  await runSingleAsync ( `${name} -> async -> atomically`, writeFile, buffer );
  await runSingleAsync ( `${name} -> async -> atomically (faster)`, writeFile, buffer, { mode: false, chown: false, fsyncWait: false } );
  await runSingleAsync ( `${name} -> async -> atomically (fastest)`, writeFile, buffer, { mode: false, chown: false, fsync: false } );
};

const runAllSync = ( name, buffer ) => {
  runSingleSync ( `${name} -> sync -> write-file-atomic`, writeFileAtomic.sync, buffer );
  runSingleSync ( `${name} -> sync -> write-file-atomic (fastest)`, writeFileAtomic.sync, buffer, { fsync: false } );
  runSingleSync ( `${name} -> sync -> atomically`, writeFileSync, buffer );
  runSingleSync ( `${name} -> sync -> atomically (faster)`, writeFileSync, buffer, { mode: false, chown: false, fsyncWait: false } );
  runSingleSync ( `${name} -> sync -> atomically (fastest)`, writeFileSync, buffer, { mode: false, chown: false, fsync: false } );
};

const runAll = async ( name, buffer ) => {
  await runAllAsync ( name, buffer );
  console.log ( '-------------------' );
  runAllSync ( name, buffer );
};

const run = async () => {
  runAllDummy ();
  console.log ( '===================' );
  await runAll ( '100kb', Buffer.allocUnsafe ( 100 * 1024 ) );
  console.log ( '===================' );
  await runAll ( '10kb', Buffer.allocUnsafe ( 10 * 1024 ) );
  console.log ( '===================' );
  await runAll ( '1kb', Buffer.allocUnsafe ( 1024 ) );
  console.log ( '===================' );
};

run ();