/* Copyright 2017 - 2022 R. Thomas
 * Copyright 2017 - 2022 Quarkslab
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef LIEF_MACHO_FAT_BINARY_H_
#define LIEF_MACHO_FAT_BINARY_H_
#include <string>
#include <vector>
#include <memory>

#include "LIEF/types.hpp"
#include "LIEF/visibility.h"

#include "LIEF/MachO/enums.hpp"
#include "LIEF/iterators.hpp"

namespace LIEF {
class Parser;
namespace MachO {

class Parser;
class Builder;
class Binary;

//! Class which represent a Mach-O (fat) binary
//! This object is also used for representing Mach-O binaries that are **NOT FAT**
class LIEF_API FatBinary {

  friend class LIEF::Parser;
  friend class Parser;
  friend class Builder;

  public:

  //! Internal containter used to store Binary objects within a Fat Mach-O
  using binaries_t = std::vector<std::unique_ptr<Binary>>;

  //! Iterator that outputs Binary&
  using it_binaries = ref_iterator<binaries_t&, Binary*>;

  //! Iterator that outputs const Binary&
  using it_const_binaries = const_ref_iterator<const binaries_t&, Binary*>;

  FatBinary(const FatBinary&) = delete;
  FatBinary& operator=(const FatBinary&) = delete;

  virtual ~FatBinary();

  //! Number of MachO::Binary wrapped by this object
  size_t size() const;

  //! Checks whether this object contains MachO::Binary
  bool empty() const;

  it_binaries begin();
  it_const_binaries begin() const;

  it_binaries end();
  it_const_binaries end() const;

  //! Get a pointer to the last MachO::Binary object presents in this Fat Binary.
  //! It returns a nullptr if no binary are present.
  std::unique_ptr<Binary> pop_back();

  //! Get a pointer to the MachO::Binary specified by the ``index``.
  //! It returns a nullptr if the binary does not exist at the given index.
  Binary*       at(size_t index);
  const Binary* at(size_t index) const;

  Binary*       back();
  const Binary* back() const;

  Binary*       front();
  const Binary* front() const;

  Binary*       operator[](size_t index);
  const Binary* operator[](size_t index) const;

  //! Extract a MachO::Binary object. Gives ownership to the caller, and
  //! remove it from this FatBinary object.
  //!
  //! @warning: this invalidates any previously hold iterator!
  std::unique_ptr<Binary> take(size_t index);

  //! Take the underlying MachO::Binary that matches the given architecture
  //! If no binary with the architecture can be found, return a nullptr
  std::unique_ptr<Binary> take(CPU_TYPES cpu);

  //! Reconstruct the Fat binary object and write it in `filename`
  //! @param filename Path to write the reconstructed binary
  void write(const std::string& filename);

  //! Reconstruct the Fat binary object and return his content as bytes
  std::vector<uint8_t> raw();

  LIEF_API friend std::ostream& operator<<(std::ostream& os, const FatBinary& fatbinary);

  private:
  FatBinary();
  FatBinary(binaries_t binaries);
  binaries_t binaries_;
};

} // namespace MachO
} // namespace LIEF
#endif