/*
 * Copyright 2012, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */


#include "CliStopCommand.h"

#include <stdio.h>

#include <AutoLocker.h>

#include "CliContext.h"
#include "MessageCodes.h"
#include "Team.h"
#include "UserInterface.h"

CliStopCommand::CliStopCommand()
        :
        CliCommand("stop a thread",
                "%s [ <thread ID> ]\n"
                "Stops the thread specified by <thread ID>, if supplied. Otherwise "
                        "stops\n"
                "the current thread.")
{
}


void
CliStopCommand::Execute(int argc, const char* const* argv,
        CliContext& context)
{
        if (argc > 2) {
                PrintUsage(argv[0]);
                return;
        }


        AutoLocker<Team> teamLocker(context.GetTeam());
        Thread* thread = NULL;
        if (argc < 2) {
                thread = context.CurrentThread();
                if (thread == NULL) {
                        printf("Error: No current thread.\n");
                        return;
                }
        } else if (argc == 2) {
                // parse the argument
                char* endPointer;
                long threadID = strtol(argv[1], &endPointer, 0);
                if (*endPointer != '\0' || threadID < 0) {
                        printf("Error: Invalid parameter \"%s\"\n", argv[1]);
                        return;
                }

                // get the thread and change the current thread
                Team* team = context.GetTeam();
                thread = team->ThreadByID(threadID);
                if (thread == NULL) {
                        printf("Error: No thread with ID %ld\n", threadID);
                        return;
                }
        }

        if (thread->State() == THREAD_STATE_STOPPED) {
                printf("Error: thread %" B_PRId32 " is already stopped.\n",
                        thread->ID());
                return;
        }

        context.GetUserInterfaceListener()->ThreadActionRequested(thread->ID(),
                MSG_THREAD_STOP);
}