#include <PalmOS.h>
#include "database.h"
#include "helloRsc.h"


static Err StartApplication(void)
{
    FrmGotoForm(MainForm);
    DBOpen();
    DBSize();
    return errNone;
}


static void StopApplication(void)
{
    DBClose();
}


static Boolean MainMenuHandleEvent(UInt16 menuID)
{
    Boolean    handled = false;
    FormType   *form;
    FieldType  *field;


    form =  FrmGetActiveForm();
    field = FrmGetObjectPtr(form, FrmGetFocus(form));

    switch (menuID) {
        case MainEditUndo:
            FldUndo(field);
            handled = true;
            break;
        case MainEditCut:
            FldCut(field);
            handled = true;
            break;
        case MainEditCopy:
            FldCopy(field);
            handled = true;
            break;
        case MainEditPaste:
            FldPaste(field);
            handled = true;
            break;
        case MainEditSelectAll:
            FldSetSelection(field, 0, FldGetTextLength(field));
            handled = true;
            break;

        case MainEditKeyboard:
            SysKeyboardDialog(kbdDefault);
            handled = true;
            break;

        case MainEditGraffitiHelp:
            SysGraffitiReferenceDialog(referenceDefault);
            handled = true;
            break;

        case MainOptionsAbout:
            FrmAlert(AboutAlert);
            handled = true;
            break;

        default:
            break;
    }

    return handled;
}


static Boolean MainFormHandleEvent(EventPtr event)
{
    Boolean  handled = false;

    switch (event->eType) {
        case frmOpenEvent:
        {
            FormType  *form = FrmGetFormPtr(MainForm);
            FrmDrawForm(form);

            DBShow(); /* update display for the first time */

            FrmSetFocus(form, FrmGetObjectIndex(form, MainFData));
            handled = true;
        }
            break;

        case ctlSelectEvent:
            switch (event->data.ctlSelect.controlID) {

                case MainBFirst:
                    DBFirst();
                    handled = true;
                    break;

                case MainBPrev:
                    DBPrev();
                    handled = true;
                    break;

                case MainBNext:
                    DBNext();
                    handled = true;
                    break;

                case MainBLast:
                    DBLast();
                    handled = true;
                    break;

                case MainBRefresh:
                    DBShow();
                    handled = true;
                    break;

                case MainBUpdate:
                    DBUpdate();
                    handled = true;
                    break;

                case MainBInsert:
                    DBInsert();
                    handled = true;
                    break;

                case MainBDelete:
                    DBDelete();
                    handled = true;
                    break;

                default:
                    break;
            }
            break;

        case menuEvent:
            handled = MainMenuHandleEvent(event->data.menu.itemID);
            break;

        default:
            break;
    }

    return handled;
}


static Boolean ApplicationHandleEvent(EventPtr event)
{
    FormType  *form;
    UInt16    formID;
    Boolean   handled = false;


    if (event->eType == frmLoadEvent) {
        formID = event->data.frmLoad.formID;
        form = FrmInitForm(formID);
        FrmSetActiveForm(form);

        switch (formID) {
            case MainForm:
                FrmSetEventHandler(form, MainFormHandleEvent);
                break;

            default:
                break;
        }
        handled = true;
    }

    return handled;
}


static void EventLoop(void)
{
    EventType  event;
    UInt16     error;

    do {
        EvtGetEvent(&event, evtWaitForever);
        if (! SysHandleEvent(&event))
            if (! MenuHandleEvent(0, &event, &error))
                if (! ApplicationHandleEvent(&event))
                    FrmDispatchEvent(&event);
    } while (event.eType != appStopEvent);
}


UInt32 PilotMain(UInt16 launchCode, MemPtr cmdPBP, UInt16 launchFlags)
{
    Err  err=errNone;

    switch (launchCode) {
        case sysAppLaunchCmdNormalLaunch:
            if ((err = StartApplication()) == 0) {
                EventLoop();
                StopApplication();
            }
            break;

        default:
            break;
    }

    return err;
}