#include "arg_func.h"
#include "func.h"
#include <string>
#include "win.h"
#include "func.h"
#include "buffer.h"
#include "cryptography.h"

void print_args()
{
	printf_s(" Usage:\n\n");
	printf_s(" password_manager.exe [flags]\n\n");
	printf_s(" Flags:\n\n");
	printf_s(" -h         \t print this message\n");
	printf_s(" <label>    \t get password of this label can use GLOB\n");
	printf_s(" -g <label> \t generate password of this label (or update if exists)\n");
	printf_s(" -d <label> \t delete password of this label\n");
	printf_s(" -i <label> \t input password for this label (or update if exists)\n");
	printf_s(" -s <label> \t show password for this label\n");
	printf_s(" -l         \t list all labels\n");
	printf_s(" -p         \t print all passwords\n");
	printf_s(" -c         \t change master password\n");
}

Arg get_args(int argc, char** argv, char** label) {
	if (argc < 2)
	{
		print_args();
		return Arg::Error;
	}

	if (!strcmp("-h", argv[1]))
	{
		print_args();
		return Arg::Error;
	}

	if (!strcmp("-l", argv[1])) return Arg::List;
	if (!strcmp("-p", argv[1])) return Arg::Print_all_p;
	if (!strcmp("-c", argv[1])) return Arg::Change;

	if (argc < 3)
	{
		*label = argv[1];
		return Arg::Get;
	}

	*label = argv[2];

	if (!strcmp("-g", argv[1])) return Arg::Generate;
	if (!strcmp("-d", argv[1])) return Arg::Delete;
	if (!strcmp("-i", argv[1]))	return Arg::Input;
	if (!strcmp("-s", argv[1])) return Arg::Show;

	return Arg::Error;
}

std::optional<LoginInfoPointer> arg_get(Buffer& decrypted_buffer, const char* label)
{
	int pass = find_logininfo_in_buffer(decrypted_buffer, label);
	if (pass < 0) {
		printf_s("Password not found\n");
		return {};
	}
	return get_logininfo_pointer_from_buffer(decrypted_buffer, pass);
}

std::optional<LoginInfoPointer> arg_generate(Buffer& decrypted_buffer, Buffer& encrypted_buffer, const char* label, Cryptography& crypto)
{
	printf_s("Generating password for %s\n", label);

	std::string password;
	generate_password(password, 15);

	int pass = find_logininfo_in_buffer(decrypted_buffer, label);
	if (pass >= 0)	delete_logininfo_from_buffer(decrypted_buffer, pass);

	add_logininfo_to_buffer(decrypted_buffer, label, password.c_str());
	crypto.encrypt(&decrypted_buffer, &encrypted_buffer);
	encrypted_buffer.save_to_file();
	Index* index = (Index*)decrypted_buffer.buffer;
	return get_logininfo_pointer_from_buffer(decrypted_buffer, index->count - 1);
}

std::optional<LoginInfoPointer> arg_input(Buffer& decrypted_buffer, Buffer& encrypted_buffer, const char* label, Cryptography& crypto)
{
	printf_s("Input password for %s:", label);

	std::string new_string = get_user_password();
	if (new_string.empty())
	{
		printf_s("error getting password\n");
		return {};
	}

	int pass = find_logininfo_in_buffer(decrypted_buffer, label);
	if (pass >= 0) delete_logininfo_from_buffer(decrypted_buffer, pass);

	add_logininfo_to_buffer(decrypted_buffer, label, new_string.c_str());
	crypto.encrypt(&decrypted_buffer, &encrypted_buffer);
	encrypted_buffer.save_to_file();
	Index* index = (Index*)decrypted_buffer.buffer;
	return get_logininfo_pointer_from_buffer(decrypted_buffer, index->count - 1);
}

void arg_list(Buffer& decrypted_buffer)
{
	Index* index = (Index*)decrypted_buffer.buffer;
	LoginInfo* pass = (LoginInfo*)(decrypted_buffer.buffer + sizeof(Index));

	for (size_t i = 0; i < index->count; i++)
	{
		printf_s("label: %s\n", decrypted_buffer.buffer + pass[i].label + index->offset);
	}
}

void arg_delete(Buffer& decrypted_buffer, Buffer& encrypted_buffer, const char* label_to_del, Cryptography& crypto)
{
	printf_s("Deleting password for %s\n", label_to_del);
	int pass = find_logininfo_in_buffer(decrypted_buffer, label_to_del);
	if (pass < 0)
	{
		printf_s("Password not found\n");
		return;
	}

	delete_logininfo_from_buffer(decrypted_buffer, pass);

	crypto.encrypt(&decrypted_buffer, &encrypted_buffer);
	encrypted_buffer.save_to_file();
	printf_s("Password deleted\n");
}

void arg_print_all_p(Buffer& decrypted_buffer, std::string& user_pass)
{
	printf_s("Input main password for confirmation:");
	std::string new_string = get_user_password();
	if (new_string.empty())
	{
		printf_s("Error getting password\n");
		return;
	}
	if (new_string != user_pass)
	{
		printf_s("Wrong password\n");
		return;
	}

	Index* index = (Index*)decrypted_buffer.buffer;
	LoginInfo* pass = (LoginInfo*)(decrypted_buffer.buffer + sizeof(Index));

	for (size_t i = 0; i < index->count; i++)
	{
		printf_s("label: %s\t\t\t", decrypted_buffer.buffer + pass[i].label + index->offset);
		printf_s("password: %s\n", decrypted_buffer.buffer + pass[i].password + index->offset);
	}
}

void arg_change(Buffer& decrypted_buffer, Buffer& encrypted_buffer, std::string& user_pass, Cryptography& crypto)
{
	printf_s("Input main password for confirmation:");

	std::string new_string = get_user_password();
	if (new_string.empty())
	{
		printf_s("Error getting password\n");
		return;
	}

	if (new_string != user_pass)
	{
		printf_s("Passwords don't match\n");
		return;
	}

	printf_s("Input new password:");
	new_string = get_user_password();
	if (new_string.empty())
	{
		printf_s("Error getting password\n");
		return;
	}

	printf_s("Input new password again:");
	user_pass = get_user_password();
	if (user_pass.empty())
	{
		printf_s("Error getting password\n");
		return;
	}

	if (new_string != user_pass)
	{
		printf_s("Passwords don't match\n");
		return;
	}

	crypto.generate_key_and_iv_from_password(new_string.c_str(), new_string.size());
	crypto.encrypt(&decrypted_buffer, &encrypted_buffer);
	encrypted_buffer.save_to_file();
	printf_s("Password changed\n");
}

void arg_show(Buffer& decrypted_buffer, const char* label) {

	int pass = find_logininfo_in_buffer(decrypted_buffer, label);

	if (pass < 0)
		printf_s("Password not found\n");
	else
		printf_s("Password: %s\n", get_logininfo_pointer_from_buffer(decrypted_buffer, pass).password);
}