//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "tl_writer_jni_h.h"

#include <cassert>

namespace td {

bool TD_TL_writer_jni_h::is_built_in_simple_type(const std::string &name) const {
  return name == "Bool" || name == "Int32" || name == "Int53" || name == "Int64" || name == "Double" ||
         name == "String" || name == "Bytes";
}

bool TD_TL_writer_jni_h::is_built_in_complex_type(const std::string &name) const {
  return name == "Vector";
}

int TD_TL_writer_jni_h::get_additional_function_type(const std::string &additional_function_name) const {
  if (additional_function_name == "init_jni_vars") {
    return 1;
  }
  return TD_TL_writer_h::get_additional_function_type(additional_function_name);
}

int TD_TL_writer_jni_h::get_parser_type(const tl::tl_combinator *t, const std::string &parser_name) const {
  return 1;
}

std::vector<std::string> TD_TL_writer_jni_h::get_parsers() const {
  std::vector<std::string> parsers;
  parsers.push_back("JNIEnv *env, jobject");
  return parsers;
}

std::vector<std::string> TD_TL_writer_jni_h::get_storers() const {
  std::vector<std::string> storers;
  storers.push_back("JNIEnv *env, jobject");
  storers.push_back("TlStorerToString");
  return storers;
}

std::vector<std::string> TD_TL_writer_jni_h::get_additional_functions() const {
  std::vector<std::string> additional_functions = TD_TL_writer_h::get_additional_functions();
  additional_functions.push_back("init_jni_vars");
  return additional_functions;
}

std::string TD_TL_writer_jni_h::gen_base_type_class_name(int arity) const {
  assert(arity == 0);
  return "Object";
}

std::string TD_TL_writer_jni_h::gen_base_tl_class_name() const {
  return "Object";
}

std::string TD_TL_writer_jni_h::gen_output_begin() const {
  std::string ext_include_str;
  for (auto &it : ext_include) {
    ext_include_str += "#include " + it + "\n";
  }
  return "#pragma once\n\n"
         "#include \"td/tl/TlObject.h\"\n\n"
         "#include <cstdint>\n"
         "#include <utility>\n"
         "#include <vector>\n\n"
         "#include <jni.h>\n\n" +
         ext_include_str +
         "\n"

         "namespace td {\n" +
         forward_declaration("TlStorerToString") +
         "\n"
         "namespace " +
         tl_name +
         " {\n\n"

         "class " +
         gen_base_tl_class_name() +
         ";\n"
         "using BaseObject = " +
         gen_base_tl_class_name() +
         ";\n\n"

         "template <class Type>\n"
         "using object_ptr = ::td::tl_object_ptr<Type>;\n\n"
         "template <class Type, class... Args>\n"
         "object_ptr<Type> make_object(Args &&... args) {\n"
         "  return object_ptr<Type>(new Type(std::forward<Args>(args)...));\n"
         "}\n\n"

         "template <class ToType, class FromType>\n"
         "object_ptr<ToType> move_object_as(FromType &&from) {\n"
         "  return object_ptr<ToType>(static_cast<ToType *>(from.release()));\n"
         "}\n\n"

         "std::string to_string(const BaseObject &value);\n\n"

         "template <class T>\n"
         "std::string to_string(const object_ptr<T> &value) {\n"
         "  if (value == nullptr) {\n"
         "    return \"null\";\n"
         "  }\n"
         "\n"
         "  return to_string(*value);\n"
         "}\n\n";
}

std::string TD_TL_writer_jni_h::gen_class_begin(const std::string &class_name, const std::string &base_class_name,
                                                bool is_proxy) const {
  if (class_name == gen_base_tl_class_name()) {
    return "class " + class_name +
           " {\n"
           " public:\n"
           "  virtual ~" +
           class_name +
           "() {\n"
           "  }\n\n" +
           "  virtual void store(JNIEnv *env, jobject &s) const {\n"
           "  }\n\n"
           "  virtual void store(TlStorerToString &s, const char *field_name) const = 0;\n\n"
           "  static jclass Class;\n";
  }
  return "class " + class_name + (!is_proxy ? " final " : "") + ": public " + base_class_name +
         " {\n"
         " public:\n"
         "  static jclass Class;\n";
}

std::string TD_TL_writer_jni_h::gen_field_definition(const std::string &class_name, const std::string &type_name,
                                                     const std::string &field_name) const {
  return TD_TL_writer_h::gen_field_definition(class_name, type_name, field_name) + "  static jfieldID " + field_name +
         "fieldID;\n";
}

std::string TD_TL_writer_jni_h::gen_additional_function(const std::string &function_name, const tl::tl_combinator *t,
                                                        bool is_function) const {
  if (function_name == "init_jni_vars") {
    return "\n"
           "  static void " +
           function_name + "(JNIEnv *env, const char *package_name);\n";
  }

  return TD_TL_writer_h::gen_additional_function(function_name, t, is_function);
}

std::string TD_TL_writer_jni_h::gen_additional_proxy_function_begin(const std::string &function_name,
                                                                    const tl::tl_type *type,
                                                                    const std::string &class_name, int arity,
                                                                    bool is_function) const {
  if (function_name == "init_jni_vars") {
    return "\n"
           "  static void " +
           function_name + "(JNIEnv *env, const char *package_name);\n";
  }

  return TD_TL_writer_h::gen_additional_proxy_function_begin(function_name, type, class_name, arity, is_function);
}

std::string TD_TL_writer_jni_h::gen_additional_proxy_function_case(const std::string &function_name,
                                                                   const tl::tl_type *type,
                                                                   const std::string &class_name, int arity) const {
  if (function_name == "init_jni_vars") {
    return "";
  }

  return TD_TL_writer_h::gen_additional_proxy_function_case(function_name, type, class_name, arity);
}

std::string TD_TL_writer_jni_h::gen_additional_proxy_function_case(const std::string &function_name,
                                                                   const tl::tl_type *type, const tl::tl_combinator *t,
                                                                   int arity, bool is_function) const {
  if (function_name == "init_jni_vars") {
    return "";
  }

  return TD_TL_writer_h::gen_additional_proxy_function_case(function_name, type, t, arity, is_function);
}

std::string TD_TL_writer_jni_h::gen_additional_proxy_function_end(const std::string &function_name,
                                                                  const tl::tl_type *type, bool is_function) const {
  if (function_name == "init_jni_vars") {
    return "";
  }

  return TD_TL_writer_h::gen_additional_proxy_function_end(function_name, type, is_function);
}

}  // namespace td