//-----------------------------------------------------------------------------
// Copyright (C) 2009 Michael Gernoth <michael at gernoth.net>
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Main binary
//-----------------------------------------------------------------------------
#include "proxmark3.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <readline/readline.h>
#include <readline/history.h>
#include "proxgui.h"
#include "cmdmain.h"
#include "uart.h"
#include "ui.h"
#include "util.h"
#include "cmdparser.h"
#include "cmdhw.h"
#include "whereami.h"

#if defined (_WIN32)
#define SERIAL_PORT_H	"com3"
#elif defined(__APPLE__)
#define SERIAL_PORT_H   "/dev/cu.usbmodem888"
#else
#define SERIAL_PORT_H	"/dev/ttyACM0"
#endif

static serial_port sp;
static UsbCommand txcmd;
static char comport[255];
byte_t rx[sizeof(UsbCommand)];
byte_t* prx = rx;
volatile static bool txcmd_pending = false;
struct receiver_arg {
	int run;
};

void SendCommand(UsbCommand *c) {
	#if 0
	pthread_mutex_lock(&print_lock);
	PrintAndLogEx(NORMAL, "Sending %d bytes\n", sizeof(UsbCommand));
	pthread_mutex_unlock(&print_lock);
	#endif

	if (offline) {
		PrintAndLogEx(NORMAL, "Sending bytes to proxmark failed - offline");
		return;
	}
	/**
	The while-loop below causes hangups at times, when the pm3 unit is unresponsive
	or disconnected. The main console thread is alive, but comm thread just spins here.
	Not good.../holiman
	**/
	while (txcmd_pending);

	txcmd = *c;
	 __atomic_test_and_set(&txcmd_pending, __ATOMIC_SEQ_CST);
}


#if defined(__linux__) || (__APPLE__)
static void showBanner(void){
	printf("\n\n");
	printf("\e[34m██████╗ ███╗   ███╗ ████╗\e[0m     ...iceman fork\n");
	printf("\e[34m██╔══██╗████╗ ████║   ══█║\e[0m\n");
	printf("\e[34m██████╔╝██╔████╔██║ ████╔╝\e[0m\n");
	printf("\e[34m██╔═══╝ ██║╚██╔╝██║   ══█║\e[0m    iceman@icesql.net\n");
	printf("\e[34m██║     ██║ ╚═╝ ██║ ████╔╝\e[0m  https://github.com/iceman1001/proxmark3\n");
	printf("\e[34m╚═╝     ╚═╝     ╚═╝ ╚═══╝\e[0m v3.1.0\n");
	printf("\nKeep iceman fork alive with a donation!           https://paypal.me/iceman1001/");
	printf("\nMONERO: 43mNJLpgBVaTvyZmX9ajcohpvVkaRy1kbZPm8tqAb7itZgfuYecgkRF36rXrKFUkwEGeZedPsASRxgv4HPBHvJwyJdyvQuP");
	printf("\n\n\n");
}
#endif

bool hookUpPM3() {	
	bool ret = false;
	sp = uart_open( comport );
	
	//pthread_mutex_lock(&print_lock);

	if (sp == INVALID_SERIAL_PORT) {
		PrintAndLogEx(WARNING, "Reconnect failed, retrying...  (reason: invalid serial port)\n");
		ret = false;
		offline = 1;
	} else if (sp == CLAIMED_SERIAL_PORT) {
		PrintAndLogEx(WARNING, "Reconnect failed, retrying... (reason: serial port is claimed by another process)\n");
		ret = false;
		offline = 1;
	} else {	
		PrintAndLogEx(SUCCESS, "Proxmark reconnected\n");
		ret = true;
		offline = 0;
	}
	//pthread_mutex_unlock(&print_lock);
	return ret;
}

// (iceman) if uart_receiver fails a command three times,  we conside the device to be offline.
void
#ifdef __has_attribute
#if __has_attribute(force_align_arg_pointer)
__attribute__((force_align_arg_pointer)) 
#endif
#endif
*uart_receiver(void *targ) {
	struct receiver_arg *arg = (struct receiver_arg*)targ;
	size_t rxlen;
	bool tmpsignal;
	int counter_to_offline = 0;
	
	while (arg->run) {
		rxlen = 0;
		
		if (uart_receive(sp, prx, sizeof(UsbCommand) - (prx-rx), &rxlen)) {
			
			if ( rxlen == 0 ) continue;
			
			prx += rxlen;
			if ( (prx-rx) < sizeof(UsbCommand)) {
				continue;
			}
			
			UsbCommandReceived((UsbCommand*)rx);
		}
		prx = rx;

		__atomic_load(&txcmd_pending, &tmpsignal, __ATOMIC_SEQ_CST);
		if ( tmpsignal ) {
			bool res = uart_send(sp, (byte_t*) &txcmd, sizeof(UsbCommand));
			if (!res) {
				counter_to_offline++;
				PrintAndLogEx(NORMAL, "sending bytes to proxmark failed");
			}
			 __atomic_clear(&txcmd_pending, __ATOMIC_SEQ_CST);
			
			// set offline flag
			if ( counter_to_offline == 3 ) {
				__atomic_test_and_set(&offline, __ATOMIC_SEQ_CST);
				break;
			}			
		}
	}

	// when this reader thread dies, we close the serial port.
	uart_close(sp);
	
	pthread_exit(NULL);
	return NULL;
}

void
#ifdef __has_attribute
#if __has_attribute(force_align_arg_pointer)
__attribute__((force_align_arg_pointer)) 
#endif
#endif
main_loop(char *script_cmds_file, char *script_cmd, bool usb_present) {

	struct receiver_arg rarg;
	char *cmd = NULL;
	pthread_t reader_thread;
	bool execCommand = (script_cmd != NULL);
	bool stdinOnPipe = !isatty(STDIN_FILENO);
	FILE *sf = NULL;
	char script_cmd_buf[256] = {0x00};  // iceman, needs lua script the same file_path_buffer as the rest
	
	if (usb_present) {
		rarg.run = 1;
		pthread_create(&reader_thread, NULL, &uart_receiver, &rarg);
		// cache Version information now:
		if ( execCommand || script_cmds_file || stdinOnPipe)
			CmdVersion("s");
		else 
			CmdVersion("");
	}

	if (script_cmds_file) {
		sf = fopen(script_cmds_file, "r");
		
		if (sf) {
			pthread_mutex_lock(&print_lock);			
			PrintAndLogEx(SUCCESS, "executing commands from file: %s\n", script_cmds_file);
			pthread_mutex_unlock(&print_lock);
		}
	}

	read_history(".history");
	
	// loops every time enter is pressed...
	while(1) {
		
		// this should hook up the PM3 again.
		if (offline) {
			
			// sets the global variable, SP and offline)
			usb_present = hookUpPM3();
		
			// usb and the reader_thread is NULL,  create a new reader thread.
			if (usb_present && !offline) {
				rarg.run = 1;
				pthread_create(&reader_thread, NULL, &uart_receiver, &rarg);
				// cache Version information now:
				if ( execCommand || script_cmds_file || stdinOnPipe)
					CmdVersion("s");
				else 
					CmdVersion("");
			}
		}

		// If there is a script file
		if (sf) {
			
			memset(script_cmd_buf, 0, sizeof(script_cmd_buf));
			if (!fgets(script_cmd_buf, sizeof(script_cmd_buf), sf)) {
				fclose(sf);
				sf = NULL;
			} else {
				strcleanrn(script_cmd_buf, sizeof(script_cmd_buf));

				if ((cmd = strmcopy(script_cmd_buf)) != NULL) {
					pthread_mutex_lock(&print_lock);
					printf(PROXPROMPT"%s\n", cmd);
					pthread_mutex_unlock(&print_lock);
				}
			}
		} else {
			// If there is a script command
			if (execCommand){
				if ((cmd = strmcopy(script_cmd)) != NULL) {
					pthread_mutex_lock(&print_lock);
					printf(PROXPROMPT"%s\n", cmd);
					pthread_mutex_unlock(&print_lock);
				}

				execCommand = false;
			} else {
				// exit after exec command
				if (script_cmd)
					break;

				// if there is a pipe from stdin
				if (stdinOnPipe) {
					memset(script_cmd_buf, 0, sizeof(script_cmd_buf));
					if (!fgets(script_cmd_buf, sizeof(script_cmd_buf), stdin)) {
						pthread_mutex_lock(&print_lock);
						PrintAndLogEx(NORMAL, "\n[!] stdin end, exit...\n");
						pthread_mutex_unlock(&print_lock);						
						break;
					}
					strcleanrn(script_cmd_buf, sizeof(script_cmd_buf));

					if ((cmd = strmcopy(script_cmd_buf)) != NULL) {
						pthread_mutex_lock(&print_lock);
						PrintAndLogEx(NORMAL, PROXPROMPT"%s\n", cmd);
						pthread_mutex_unlock(&print_lock);
					}
					
				} else {		
					// read command from command prompt
					cmd = readline(PROXPROMPT);
				}
			}
		}
		
		// execute command
		if (cmd) {
			
			// rtrim
			size_t l = strlen(cmd);
			if ( l > 0 && isspace(cmd[l - 1]))
				cmd[l-1] = 0x00;

			if (cmd[0] != 0x00) {
				int ret = CommandReceived(cmd);
				add_history(cmd);
				
				// exit or quit
				if (ret == 99) 
					break;
			}
			free(cmd);
			cmd = NULL;
		} else {
			pthread_mutex_lock(&print_lock);
			PrintAndLogEx(NORMAL, "\n");
			pthread_mutex_unlock(&print_lock);
			break;
		}
	}
	
	if (sf)
		fclose(sf);
	
	write_history(".history");

	free(cmd);
	cmd = NULL;
			
	if (usb_present) {
		rarg.run = 0;
		pthread_join(reader_thread, NULL);
	}
}

static void dumpAllHelp(int markdown) {
	PrintAndLogEx(NORMAL, "\n%sProxmark3 command dump%s\n\n", markdown ? "# " : "", markdown ? "" : "\n======================");
	PrintAndLogEx(NORMAL, "Some commands are available only if a Proxmark is actually connected.%s\n", markdown ? "  " : "");
	PrintAndLogEx(NORMAL, "Check column \"offline\" for their availability.\n");
	PrintAndLogEx(NORMAL, "\n");
	command_t *cmds = getTopLevelCommandTable();
	dumpCommandsRecursive(cmds, markdown);
}

static char *my_executable_path = NULL;
static char *my_executable_directory = NULL;

const char *get_my_executable_path(void) {
	return my_executable_path;
}

const char *get_my_executable_directory(void) {
	return my_executable_directory;
}

static void set_my_executable_path(void) {
	int path_length = wai_getExecutablePath(NULL, 0, NULL);
	if (path_length != -1) {
		my_executable_path = (char*)malloc(path_length + 1);
		int dirname_length = 0;
		if (wai_getExecutablePath(my_executable_path, path_length, &dirname_length) != -1) {
			my_executable_path[path_length] = '\0';
			my_executable_directory = (char *)malloc(dirname_length + 2);
			strncpy(my_executable_directory, my_executable_path, dirname_length+1);
			my_executable_directory[dirname_length+1] = '\0';
		}
	}
}

static void show_help(bool showFullHelp, char *command_line){
	PrintAndLogEx(NORMAL, "syntax: %s <port> [-h|-help|-m|-f|-flush|-w|-wait|-c|-command|-l|-lua] [cmd_script_file_name] [command][lua_script_name]\n", command_line);
	PrintAndLogEx(NORMAL, "\tLinux example:'%s /dev/ttyACM0'\n", command_line);
	PrintAndLogEx(NORMAL, "\tWindows example:'%s com3'\n\n", command_line);
	
	if (showFullHelp){
		PrintAndLogEx(NORMAL, "help: <-h|-help> Dump all interactive command's help at once.\n");
		PrintAndLogEx(NORMAL, "\t%s  -h\n\n", command_line);
		PrintAndLogEx(NORMAL, "markdown: <-m> Dump all interactive help at once in markdown syntax\n");
		PrintAndLogEx(NORMAL, "\t%s -m\n\n", command_line);
		PrintAndLogEx(NORMAL, "flush: <-f|-flush> Output will be flushed after every print.\n");
		PrintAndLogEx(NORMAL, "\t%s -f\n\n", command_line);
		PrintAndLogEx(NORMAL, "wait: <-w|-wait> 20sec waiting the serial port to appear in the OS\n");
		PrintAndLogEx(NORMAL, "\t%s "SERIAL_PORT_H" -w\n\n", command_line);
		PrintAndLogEx(NORMAL, "script: A script file with one proxmark3 command per line.\n\n");
		PrintAndLogEx(NORMAL, "command: <-c|-command> Execute one proxmark3 command.\n");
		PrintAndLogEx(NORMAL, "\t%s "SERIAL_PORT_H" -c \"hf mf chk 1* ?\"\n", command_line);
		PrintAndLogEx(NORMAL, "\t%s "SERIAL_PORT_H" -command \"hf mf nested 1 *\"\n\n", command_line);
		PrintAndLogEx(NORMAL, "lua: <-l|-lua> Execute lua script.\n");
		PrintAndLogEx(NORMAL, "\t%s "SERIAL_PORT_H" -l hf_read\n\n", command_line);
	}
}

int main(int argc, char* argv[]) {
	srand(time(0));
  
	bool usb_present = false;
	bool waitCOMPort = false;
	bool executeCommand = false;
	bool addLuaExec = false;
	char *script_cmds_file = NULL;
	char *script_cmd = NULL;

	// Must be before the first PrintAndLog call, for rl_redisplay
	rl_initialize();
  
	if (argc < 2) {
		show_help(true, argv[0]);
		return 1;
	}
	
	// lets copy the comport string.
	memset(comport, 0, sizeof(comport));
	memcpy(comport, argv[1], strlen(argv[1]));

	for (int i = 1; i < argc; i++) {
	
		// helptext
		if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0) {
			show_help(false, argv[0]);
			dumpAllHelp(0);
			return 0;
		}
		
		// dump markup
		if (strcmp(argv[i], "-m") == 0) {
			dumpAllHelp(1);
			return 0;
		}	   

		// flush output
		if(strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "-flush") == 0){
			PrintAndLogEx(NORMAL, "Output will be flushed after every print.\n");
			flushAfterWrite = 1;
		}
		
		// wait for comport
		if(strcmp(argv[i], "-w") == 0 || strcmp(argv[i], "-wait") == 0){
			waitCOMPort = true;
		}

		// execute pm3 command
		if(strcmp(argv[i], "-c") == 0 || strcmp(argv[i], "-command") == 0){
			executeCommand = true;
		}

		// execute lua script
		if(strcmp(argv[i], "-l") == 0 || strcmp(argv[i], "-lua") == 0){
			executeCommand = true;
			addLuaExec = true;
		}
	}

	// If the user passed the filename of the 'script' to execute, get it from last parameter
	if (argc > 2 && argv[argc - 1] && argv[argc - 1][0] != '-') {
		if (executeCommand){
			script_cmd = argv[argc - 1];
			
			while(script_cmd[strlen(script_cmd) - 1] == ' ')
				script_cmd[strlen(script_cmd) - 1] = 0x00;
			
			if (strlen(script_cmd) == 0) {
				script_cmd = NULL;
			} else {
				if (addLuaExec){
					// add "script run " to command
					char *ctmp = NULL;
					int len = strlen(script_cmd) + 11 + 1;
					if ((ctmp = (char*) malloc(len)) != NULL) {
						memset(ctmp, 0, len);
						strcpy(ctmp, "script run ");
						strcpy(&ctmp[11], script_cmd);
						script_cmd = ctmp;
					}
				}
				
				PrintAndLogEx(SUCCESS, "execute command from commandline: %s\n", script_cmd);
			}
		} else {
			script_cmds_file = argv[argc - 1];
		}
	}

	// check command
	if (executeCommand && (!script_cmd || strlen(script_cmd) == 0)){
		PrintAndLogEx(WARNING, "ERROR: execute command: command not found.\n");
		return 2;
	}

#if defined(__linux__) || (__APPLE__)
// ascii art doesn't work well on mingw :( 

	bool stdinOnPipe = !isatty(STDIN_FILENO);
	if ( !executeCommand && !script_cmds_file && !stdinOnPipe )
		showBanner();  
#endif
	
	// set global variables
	set_my_executable_path();
	
	// open uart
	if (!waitCOMPort) {
		sp = uart_open(argv[1]);
	} else {
		PrintAndLogEx(SUCCESS, "waiting for Proxmark to appear on %s ", argv[1]);
		fflush(stdout);
		int openCount = 0;
		do {
			sp = uart_open(argv[1]);
			msleep(500);
			printf("."); fflush(stdout);
		} while (++openCount < 30 && (sp == INVALID_SERIAL_PORT || sp == CLAIMED_SERIAL_PORT));
		PrintAndLogEx(NORMAL, "\n");
	}

	// check result of uart opening
	if (sp == INVALID_SERIAL_PORT) {
		PrintAndLogEx(WARNING, "ERROR: invalid serial port");
		usb_present = false;
		offline = 1;
	} else if (sp == CLAIMED_SERIAL_PORT) {
		PrintAndLogEx(WARNING, "ERROR: serial port is claimed by another process");
		usb_present = false;
		offline = 1;
	} else {
		usb_present = true;
		offline = 0;
	}

	// create a mutex to avoid interlacing print commands from our different threads
	pthread_mutex_init(&print_lock, NULL);

#ifdef HAVE_GUI

#  ifdef _WIN32
	InitGraphics(argc, argv, script_cmds_file, script_cmd, usb_present);
	MainGraphics();
#  else
	// for *nix distro's,  check enviroment variable to verify a display
	char* display = getenv("DISPLAY");
	if (display && strlen(display) > 1) {
		InitGraphics(argc, argv, script_cmds_file, script_cmd, usb_present);
		MainGraphics();
	} else {
		main_loop(script_cmds_file, script_cmd, usb_present);
	}
#  endif
	
#else
	main_loop(script_cmds_file, script_cmd, usb_present);
#endif	
 
	// clean up mutex
	pthread_mutex_destroy(&print_lock);
	
	exit(0);
}