#include "types.hpp"

#include <cstdint>

namespace le {

struct NotALEFileException : public std::runtime_error {
	NotALEFileException();
};

enum class Bord : uint8_t {
	little_endian = 0,
	big_endian = 1,
};

enum class Word : uint8_t {
	little_endian = 0,
	big_endian = 0,
};

enum class CpuType : uint16_t {
	_80286 = 1,
	_80386 = 2,
	_80486 = 3,
};

enum class OsType : uint16_t {
	Unknown = 0,
	OS_2 = 1,
	Windows = 2,
	Dos_4x = 3,
	Windows_386 = 4,
};

enum class module_flags {
	per_process_library_initialization = 0x4,
	internal_fixups = 0x10,
	incompat_pm_windowing = 0x100,
	compat_pm_windowing = 0x200,
	uses_pm_windowing = 0x300,
	module_not_loadable = 0x2000,
	module_type_mask = 0x38000,
	program_module = 0x0,
	library_module = 0x8000,
	protected_memory_library_module = 0x18000,
	physical_device_driver_module = 0x20000,
	virtual_device_driver_module = 0x28000,
	per_process_library_temrination = 0x40000000,
};

using binparse::Magic16;
using binparse::Value8;
using binparse::Value16;
using binparse::Value32;
using binparse::Offset32;

struct Header {
	Magic16 magic;
	Value8 B_ord;
	Value8 W_ord;
	Value32 format_level;
	Value16 cpu_type;
	Value16 os_type;
	Value32 module_version;
	Value32 module_flags;
	Value32 module_nr_of_pages;
	Offset32 EIP_object;
	Offset32 EIP;
	Offset32 ESP_object;
	Offset32 ESP;
	Value32 page_size;
	Offset32 page_offset_shift;
	Value32 fixup_section_size;
	Value32 fixup_section_checksum;
	Value32 loader_section_size;
	Value32 loader_section_checksum;
	Offset32 object_table_offset;
	Value32 nr_objects_in_module;
	Offset32 object_page_table_offset;
	Offset32 objct_iter_pages_offset;
	Offset32 resource_table_offset;
	Value32 nr_resource_table_entries;
	Offset32 resident_name_table_offset;
	Offset32 entry_table_offset;
	Offset32 module_directives_offset;
	Value32 nr_module_directives;
	Offset32 fixup_page_table_offset;
	Offset32 fixup_record_table_offset;
	Offset32 import_module_table_offset;
	Value32 import_mod_entries;
	Offset32 import_proc_table_offset;
	Offset32 per_page_checksum_offset;
	Offset32 data_page_offset;
	Value32 nr_preload_pages;
	Offset32 non_res_name_table_offset;
	Value32 non_res_name_table_length;
	Value32 non_res_name_table_checksum;
	Value32 auto_ds_object_nr;
	Offset32 debug_info_offset;
	Value32 debug_info_length;
	Value32 nr_instance_preload;
	Value32 nr_instance_demand;
	Value32 heapsize;
};

Header parse_header(std::istream& is);

std::ostream& operator<<(std::ostream& os, Header const& header);

}