'use strict';

var passed = 0, failed = 0;
function is(a, b, msg) {
  if (a == b) {
    ++passed;
    console.log("PASS " + msg);
  } else {
    ++failed;
    console.log("FAIL " + msg);
    console.log("GOT: " + JSON.stringify(a));
    console.log("EXPECTED: " + JSON.stringify(b));
  }
}

function ok(a, msg) {
  if (!!a) {
    ++passed;
    console.log("PASS " + msg);
  } else {
    ++failed;
    console.log("FAIL " + msg);
  }
}

var tests = [];

function next() {
  if (tests.length == 0) {
    ok(true, "TESTS COMPLETED");
    console.log("DONE: " + passed + " PASS, " + failed + " FAIL");
  } else {
    var test = tests.shift();
    test();
  }
}

tests.push(function() {
  fs.exists("/", function(exists) {
    is(exists, true, "root directory exists");
    next();
  });
});

tests.push(function() {
  fs.list("/", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 0, "files is an empty array");
    next();
  })
});

tests.push(function() {
  fs.open("/", function(fd) {
    is(fd, -1, "can't open a directory");
    next();
  });
});

tests.push(function() {
  fs.close(-1);
  next();
});

tests.push(function() {
  fs.close(0);
  next();
});

tests.push(function() {
  fs.close(1);
  next();
});

tests.push(function() {
  fs.mkdir("/prova/", function(created) {
    is(created, true, "created a directory");
    next();
  });
});

tests.push(function() {
  fs.remove("/prova/", function(removed) {
    is(removed, true, "removed a directory");
    next();
  });
});

tests.push(function() {
  fs.mkdir("/tmp", function(created) {
    is(created, true, "created a directory");
    next();
  });
});

tests.push(function() {
  fs.mkdir("/tmp/ciao", function(created) {
    is(created, true, "created a directory");
    next();
  });
});

tests.push(function() {
  fs.create("/tmp", new Blob(), function(created) {
    is(created, false, "can't create a file with the same path of an already existing directory");
    next();
  });
});

tests.push(function() {
  fs.mkdir("/tmp", function(created) {
    is(created, false, "can't create a directory with the same path of an already existing directory");
    next();
  });
});

tests.push(function() {
  fs.create("/tmp/tmp.txt", new Blob(), function(created) {
    is(created, true, "created a file");
    next();
  });
});

tests.push(function() {
  fs.mkdir("/tmp/tmp.txt", function(created) {
    is(created, false, "can't create a directory with the same path of an already existing file");
    next();
  });
});

tests.push(function() {
  fs.size("/tmp/tmp.txt", function(size) {
    is(size, 0, "newly created file's size is 0");
    next();
  });
});

tests.push(function() {
  fs.size("/tmp", function(size) {
    is(size, -1, "can't get directory size");
    next();
  });
});

tests.push(function() {
  fs.list("/", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 1, "files is an array with 1 element");
    is(files[0], "tmp", "tmp is in files");
    next();
  })
});

tests.push(function() {
  fs.list("/tmp", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 2, "files is an empty array");
    is(files[0], "ciao", "ciao is in files");
    is(files[1], "tmp.txt", "tmp.txt is in files");
    next();
  })
});

tests.push(function() {
  fs.list("/tmp/ciao", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 0, "files is an empty array");
    next();
  })
});

tests.push(function() {
  fs.truncate("/tmp", function(truncated) {
    is(truncated, false, "can't truncate a directory");
    next();
  })
});

tests.push(function() {
  fs.truncate("/tmp/tmp.txt", function(truncated) {
    is(truncated, true, "truncated a file");
    next();
  })
});

tests.push(function() {
  fs.size("/tmp/tmp.txt", function(size) {
    is(size, 0, "truncated file's size is 0");
    next();
  });
});

tests.push(function() {
  fs.list("/tmp/tmp.txt", function(files) {
    is(files, null, "can't list the children of a file");
    next();
  });
});

tests.push(function() {
  fs.create("/tmp/ciao/tmp.txt", new Blob(), function(created) {
    is(created, true, "created a file");
    next();
  });
});

tests.push(function() {
  fs.mkdir("/tmp/ciao/tmp", function(created) {
    is(created, true, "created a directory");
    next();
  });
});

tests.push(function() {
  fs.list("/tmp/ciao", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 2, "files has 2 entries");
    is(files[0], "tmp.txt", "tmp.txt is in files");
    is(files[1], "tmp", "tmp is in files");
    next();
  })
});

tests.push(function() {
  fs.remove("/tmp/ciao/tmp.txt", function(removed) {
    is(removed, true, "removed a file");
    next();
  });
});

tests.push(function() {
  fs.exists("/tmp/ciao/tmp.txt", function(exists) {
    is(exists, false, "removed file doesn't exist");
    next();
  });
});

tests.push(function() {
  fs.list("/tmp/ciao", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 1, "files has 1 entry");
    is(files[0], "tmp", "ciao is in files");
    next();
  })
});

tests.push(function() {
  fs.remove("/tmp/ciao", function(removed) {
    is(removed, false, "can't remove a dir with children");
    next();
  });
});

tests.push(function() {
  fs.remove("/tmp/ciao/tmp", function(removed) {
    is(removed, true, "removed a directory");
    next();
  });
});

tests.push(function() {
  fs.exists("/tmp/ciao/tmp", function(exists) {
    is(exists, false, "removed dir doesn't exist");
    next();
  });
});

tests.push(function() {
  fs.list("/tmp/ciao", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 0, "files is empty");
    next();
  })
});

tests.push(function() {
  fs.remove("/tmp/ciao", function(removed) {
    is(removed, true, "removed a directory");
    next();
  });
});

tests.push(function() {
  fs.list("/tmp", function(files) {
    ok(files instanceof Array, "files is an array");
    is(files.length, 1, "files is empty");
    is(files[0], "tmp.txt", "tmp.txt is in files");
    next();
  })
});

tests.push(function() {
  fs.open("/tmp/tmp.txt", function(fd) {
    is(fd, 0, "opened a file");
    next();
  });
});

tests.push(function() {
  fs.close(0);
  next();
});

tests.push(function() {
  fs.open("/tmp/tmp.txt", function(fd) {
    is(fd, 1, "reopened a file");
    next();
  });
});

tests.push(function() {
  var data = fs.read(1);
  is(data.byteLength, 0, "read from an empty file");
  next();
});

tests.push(function() {
  var data = fs.read(1, 5);
  is(data.byteLength, 0, "trying to read empty file with from > file size");
  next();
});

tests.push(function() {
  var data = fs.read(1, 0, 5);
  is(data.byteLength, 0, "trying to read too much with empty file");
  next();
});

tests.push(function() {
  fs.write(1, new TextEncoder().encode("marco"));
  next();
});

tests.push(function() {
  var data = fs.read(1, 10);
  is(data.byteLength, 0, "trying to read with from > file size");
  next();
});

tests.push(function() {
  var data = fs.read(1, 5);
  is(data.byteLength, 0, "trying to read with from == file size");
  next();
});

tests.push(function() {
  var data = fs.read(1, 0, 10);
  is(data.byteLength, 5, "trying to read too much");
  is(new TextDecoder().decode(data), "marco", "read correct");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  var data = fs.read(1);
  is(data.byteLength, 5, "read from a file with 5 bytes");
  is(new TextDecoder().decode(data), "marco", "read correct");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  fs.write(1, new TextEncoder().encode("marco2"));
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  var data = fs.read(1);
  is(data.byteLength, 6, "read from a file with 6 bytes");
  is(new TextDecoder().decode(data), "marco2", "read correct");
  next();
});

tests.push(function() {
  var data = fs.read(1, 1);
  is(data.byteLength, 5, "read 5 bytes from a file with 6 bytes");
  is(new TextDecoder().decode(data), "arco2", "read correct");
  next();
});

tests.push(function() {
  var data = fs.read(1, 0, 1);
  is(data.byteLength, 1, "read 1 byte from a file with 6 bytes");
  is(new TextDecoder().decode(data), "m", "read correct");
  next();
});

tests.push(function() {
  var data = fs.read(1, 1, 3);
  is(data.byteLength, 2, "read 2 bytes from a file with 6 bytes");
  is(new TextDecoder().decode(data), "ar", "read correct");
  next();
});

tests.push(function() {
  var data = fs.read(1, 1, 1);
  is(data.byteLength, 0, "read 0 bytes from a file with 5 bytes");
  is(new TextDecoder().decode(data), "", "read correct");
  next();
});

tests.push(function() {
  fs.write(1, new TextEncoder().encode("marco"), 1);
  ok(true, "write with from");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  var data = fs.read(1);
  is(data.byteLength, 6, "read from a file with 6 bytes");
  is(new TextDecoder().decode(data), "mmarco", "read correct");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  fs.write(1, new TextEncoder().encode("mar"));
  ok(true, "write overwriting first bytes");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  var data = fs.read(1);
  is(data.byteLength, 6, "read from a file with 6 bytes");
  is(new TextDecoder().decode(data), "marrco", "read correct");
  next();
});

tests.push(function() {
  fs.write(1, new TextEncoder().encode("marco"), 2);
  ok(true, "write overwriting and appending");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  var data = fs.read(1);
  is(data.byteLength, 7, "read from a file with 7 bytes");
  is(new TextDecoder().decode(data), "mamarco", "read correct");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  fs.write(1, new TextEncoder().encode("marco"), 20);
  ok(true, "write appending with from > size of file");
  next();
});

tests.push(function() {
  fs.setpos(1, 0);
  var data = fs.read(1);
  is(data.byteLength, 12, "read from a file with 12 bytes");
  is(new TextDecoder().decode(data), "mamarcomarco", "read correct");
  next();
});

tests.push(function() {
  fs.size("/tmp/tmp.txt", function(size) {
    is(size, 0, "unflushed file's size is 0");
    next();
  });
});

tests.push(function() {
  fs.flush(1, function() {
    ok(true, "file data flushed");
    next();
  });
});

tests.push(function() {
  is(fs.getsize(1), 12, "file's size is 12");
  next();
});

tests.push(function() {
  is(fs.getsize(2), -1, "getsize fails with an invalid fd");
  next();
});

tests.push(function() {
  fs.ftruncate(1, 6);
  is(fs.getsize(1), 6, "truncated file's size is 6");
  next();
});

tests.push(function() {
  // Test writing enough data to make the fs internal buffer increase (exponentially)
  fs.write(1, new Uint8Array(6065), 6);

  is(fs.getsize(1), 6071, "file size is now 6071");

  var data = fs.read(1, 0);

  is(new TextDecoder().decode(data).substring(0, 6), "mamarc", "read correct");

  next();
});

tests.push(function() {
  // Test writing enough data to make the fs internal buffer increase (linearly)
  fs.write(1, new Uint8Array(131073), 6);

  is(fs.getsize(1), 131079, "file size is now 131079");

  var data = fs.read(1, 0);

  is(new TextDecoder().decode(data).substring(0, 6), "mamarc", "read correct");

  next();
});

tests.push(function() {
  fs.close(1);
  next();
});

tests.push(function() {
  fs.size("/tmp/tmp.txt", function(size) {
    is(size, 12, "file's size is 12");
    next();
  });
});

tests.push(function() {
  fs.truncate("/tmp/tmp.txt", function(truncated) {
    is(truncated, true, "truncated a file");
    next();
  })
});

tests.push(function() {
  fs.size("/tmp/tmp.txt", function(size) {
    is(size, 0, "truncated file's size is 0");
    next();
  });
});

tests.push(function() {
  fs.rename("/tmp/tmp.txt", "/tmp/tmp2.txt", function(renamed) {
    ok(renamed, "File renamed");
    next();
  });
});

tests.push(function() {
  fs.create("/file", new Blob([1,2,3,4]), function(created) {
    ok(created, "File created");
    fs.rename("/file", "/file2", function(renamed) {
      ok(renamed, "File renamed");
      fs.size("/file2", function(size) {
        is(size, 4, "Renamed file size is correct");
        fs.exists("/file", function(exists) {
          ok(!exists, "file doesn't exist anymore");
          next();
        });
      });
    });
  });
});

tests.push(function() {
  fs.mkdir("/newdir", function(created) {
    ok(created, "Directory created");
    fs.rename("/newdir", "/newdir2", function(renamed) {
      ok(renamed, "Directory renamed");
      fs.exists("/newdir", function(exists) {
        ok(!exists, "newdir doesn't exist anymore");
        next();
      });
    });
  });
});

tests.push(function() {
  fs.rename("/tmp", "/tmp3", function(renamed) {
    ok(!renamed, "Can't rename a non-empty directory");
    fs.exists("/tmp", function(exists) {
      ok(exists, "Directory still exists after an error while renaming");
      next();
    });
  });
});

tests.push(function() {
  fs.rename("/tmp", "/newdir2", function(renamed) {
    ok(!renamed, "Can't rename a directory with a path to a directory that already exists");
    fs.exists("/tmp", function(exists) {
      ok(exists, "Directory still exists after an error while renaming");
      next();
    });
  });
});

tests.push(function() {
  fs.rename("/nonexisting", "/nonexising2", function(renamed) {
    ok(!renamed, "Can't rename a non-existing file");
    next();
  });
});

asyncStorage.clear(function() {
  fs.init(function() {
    next();
  });
});