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using System;
using System.Threading;
using System.Collections.Generic;
using System.Text;

class Program {
    const byte DEBUG_LEVEL = 3; //0, 1, 2, 3
    //static SerialConnection sc;
    static DaemonConnection dc;
    static Arguments CommandLine;
    //static TcpServer tcps;
    static Downloader dl;
    
    //private const byte CAN_NMT = 0x00;
    
    //private const byte CAN_NMT_RESET = 0x04;
    //private const byte CAN_NMT_START_APP  = 0x24;
    //private const byte CAN_NMT_APP_START  = 0x28;
    private const byte MY_ID = 0x00;
    private const byte MY_NID = 0x0;

    private static HexFile hf;
    static bool aBios=false;
    static bool aReset=false;
    static bool aStart=false;
    static bool aTerminal=false;
        
    static bool sNodeid=false;
    static bool sHexfile=false;
        
    static string hexfile=null;
    static byte nodeid=0;
    static string host=null;
    static int port=1200;
    
    static void Main(string[] args) {

        bool error = false;
        if (args.Length < 4) {
            Console.WriteLine("Syntax: program.exe [options] -h <host> -p <port>");
            Console.WriteLine("Host and port are host and port of canDaemon, most likely localhost and 1200.");
            Console.WriteLine("Options:");
            Console.WriteLine("  -f <hexfile>   Specify a file to be loaded to target.");
            Console.WriteLine("  -n <nodeid>    Id of target node, hex or decimal.");
            Console.WriteLine("  -t             Enter terminal mode.");
            Console.WriteLine("  -r             Reset node before loading target.");
            Console.WriteLine("  -s             Start node after loading target.");
            Console.WriteLine("  -b             Program hex as bios, use with caution.");
            error = true;
            return;
        } 

        if (!error) {
            //Console.WriteLine("arg0: " + args[0] + "\n");
            //argPort = args[0];
            //argBaud = Int32.Parse(args[1]);
            CommandLine=new Arguments(args);
            
            if (CommandLine["b"] == "true") { aBios = true; }
            if (CommandLine["r"] == "true") { aReset = true; }
            if (CommandLine["s"] == "true") { aStart = true; }
            if (CommandLine["t"] == "true") { aTerminal = true; }

            hexfile = CommandLine["f"];
            
            if (hexfile != null) {
                sHexfile = true;
            }
            if (!aTerminal && !sHexfile) {
                Console.WriteLine("When not in terminal mode a hexfile must be supplied");
                error = true;
            } 
            
            string node = CommandLine["n"];
            
            if (!parseNodeId(node)) {
                error = true;
            }
            
            if (!aTerminal && !sNodeid) {
                Console.WriteLine("When not in terminal mode a nodeid must be supplied");
                error = true;
            } 
            
            host = CommandLine["h"];
            string sPort = CommandLine["p"];
            if ((host == null) || (sPort.Length == 0)) {
                error = true;
            } else {
                try {
                    port = int.Parse(sPort);
                } catch {
                    error = true;
                }
            }
        }
        
        if  (!error) {
            //commandline feedback output (use debuglevel for hiding these)
            Console.WriteLine("canDude settings:");
            Console.WriteLine("Nodeaddress: 0x" + String.Format("{0:x2}", nodeid));
            Console.WriteLine("Host: {0}:{1}", host, port);
            if (hexfile != null) { Console.WriteLine("Hexfile: {0}", hexfile); }
            Console.Write("Parameters: ");
            if (aBios) { Console.Write("Bios "); }
            if (aReset) { Console.Write("Reset "); }
            if (aStart) { Console.Write("Start "); }
            if (aTerminal) { Console.Write("Terminal"); }
            Console.WriteLine("");
        }
        
        if (!error && aTerminal) {
            bool success = true;
            
            dc = new DaemonConnection();
            if (dc.init(host, port)) {
                Console.WriteLine("Connected to candaemon");
            } else { 
                Console.WriteLine("Connection to candaemon could not be established, I quit");
                success = false; 
            }
            
            hf = new HexFile();
            if (sHexfile && success) {
                if (hf.loadHex(hexfile)) {
                    Console.WriteLine("Hexfile loaded");
                } else { success = false; }
            }
            
            if (success) {
                if (DEBUG_LEVEL>0) {
                    Console.WriteLine("");
                    Console.WriteLine("canDude commands:");
                    //Console.WriteLine("reset - reset communication.");
                    Console.WriteLine("exit             - exit program");
                    Console.WriteLine("load [<hexfile>] - reload hexfile or load new hexfile");
                    Console.WriteLine("node <nodeid>    - specify id of target node, hex or decimal");
                    Console.WriteLine("reset            - reset node");
                    Console.WriteLine("start            - start application in node (no feedback yet)");
                    Console.WriteLine("go               - start download application to target");
                    Console.WriteLine("go bios          - start download bios to target, use with caution");
                    Console.WriteLine("");
                    //Thread.Sleep(1000);
                }
                
                string instr;
                do {
                    Console.Write("> ");
                    instr = Console.ReadLine().ToLower();
                } while (parseInput(instr));
                
                //exit command
                dc.stop();
            }
        }

        if (!error && !aTerminal) {
            //not terminal mode
            bool success = true;
            
            //load hexfile (a hexfile must be supplied as commandline argument)
            hf = new HexFile();
            if (hf.loadHex(hexfile)) {
                Console.WriteLine("Hexfile loaded");
            } else { 
                success = false;
                Console.WriteLine("Hexfile could not be loaded, I quit");
            }
            
            //connect to candaemon
            dc = new DaemonConnection();
            if (success) {
                if (dc.init(host, port)) {
                    Console.WriteLine("Connected to candaemon");
                } else { 
                    Console.WriteLine("Connection to candaemon could not be established, I quit");
                    success = false; 
                }
            }
            
            //if a hexfile is loaded and we are connected to candaemon then start autodownloading sequence
            if (success) {
                bool autosuccess = true;
                
                CanNMT cpn = new CanNMT();
                if (aReset) {
                    //send a reset command (and wait for feedback)
                    if (!cpn.doReset(dc, nodeid)) {
                        Console.WriteLine("Target node did not respond to reset, I quit");
                        autosuccess = false;
                    }
                }
                
                if (autosuccess) {
                    //send application
                    Console.WriteLine("Programming not implemented yet, I quit");
                    autosuccess = false;
                }
                
                if (autosuccess && aStart) {
                    //start applikation
                    cpn.doStart(dc, nodeid);
                }
                
            }
        }
    }
    
    static private bool parseNodeId(string node) {
        sNodeid = false;
        if (node.Length > 0) {
            try {
                nodeid = byte.Parse(node);
                sNodeid = true;
            } catch {}
        }
        if (node.Length > 2) {
            if (node.Substring(0, 2).Equals("0x")) {
                if (node.Length == 3) {
                    try {
                        nodeid = byte.Parse(node.Substring(2, 1), System.Globalization.NumberStyles.HexNumber);
                        sNodeid = true;
                    } catch {
                        Console.WriteLine("nodeadress error!");
                        return false;
                    }
                } else if (node.Length == 4) {
                    try {
                        nodeid = byte.Parse(node.Substring(2, 2), System.Globalization.NumberStyles.HexNumber);
                        sNodeid = true;
                    } catch {
                        Console.WriteLine("nodeadress error!");
                        return false;
                    }
                } else {
                    Console.WriteLine("nodeadress error!");
                    return false;
                }
            }
        }
        
        return true;
    }
    
    static private bool parseInput(string instr) {
        if (instr.Equals("reset")) {
            if (sNodeid) {
                CanNMT cpn = new CanNMT();
                cpn.doReset(dc, nodeid);
            } else {
                Console.WriteLine("No nodeid has been specified");
            }
        }
        else if (instr.Equals("start")) {
            if (sNodeid) {
                CanNMT cpn = new CanNMT();
                cpn.doStart(dc, nodeid);
            } else {
                Console.WriteLine("No nodeid has been specified");
            }
        }
        else if (instr.StartsWith("go")) {
            bool dlBios = false;
            bool error = true;
            if (instr.Equals("go bios")) {
                dlBios = true;
                error = false;
            } else if (instr.Equals("go")) {
                error = false;
            }
            
            if (!sNodeid) {
                Console.WriteLine("No nodeid has been specified");
                error = true;
            }
            if (!sHexfile) {
                Console.WriteLine("No hexfile has been specified");
                error = true;
            }
            
            CanNMT cpn = new CanNMT();
            if (!error && aReset) {
                //send a reset command (and wait for feedback)
                if (!cpn.doReset(dc, nodeid)) {
                    Console.WriteLine("Target node did not respond to reset");
                    error = true;
                }
            }
                
            if (!error) {
                //send application
                dl = new Downloader(hf, dc, nodeid, dlBios);
                if (!dl.go()) { 
                    Console.WriteLine("Error occured during download"); 
                    error = true;
                }
            }
                
            if (!error && aStart) {
                //start applikation
                cpn.doStart(dc, nodeid);
            }
            
        }
        else if (instr.StartsWith("load")) {
            if (instr.Length > 5) {
                //second argument is a hexfile, this file should be loaded
                hexfile = instr.Substring(5);
                if (hf.loadHex(hexfile)) {
                    sHexfile = true;
                    Console.WriteLine("Hexfile loaded");
                } else { 
                    Console.WriteLine("Hexfile could not be loaded");
                }
            } else {
                //reload current hexfile. if a hexfile already has been specified
                if (sHexfile) {
                    if (hf.loadHex(hexfile)) {
                        Console.WriteLine("Hexfile reloaded");
                    } else { 
                        Console.WriteLine("Hexfile could not be reloaded");
                    }
                } else {
                    Console.WriteLine("No hexfile has been specified");
                }
                
            }
        }
        else if (instr.StartsWith("node")) {
            //change nodeid
            if (instr.Length > 5) {
                //second argument is nodeid
                string node = instr.Substring(5);
                parseNodeId(node);
            }
            Console.WriteLine("NodeId is 0x"+ String.Format("{0:x2}", nodeid));
        }
        else if (instr.Equals("exit")) {
            return false;
        }
        else {
            Console.WriteLine("Unknown command.");
        }
        
        return true;
    }
    
}