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/*
 *  R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"
 *  
 *  R.app Copyright notes:
 *                     Copyright (C) 2004-5  The R Foundation
 *                     written by Stefano M. Iacus and Simon Urbanek
 *
 *                  
 *  R Copyright notes:
 *                     Copyright (C) 1995-1996   Robert Gentleman and Ross Ihaka
 *                     Copyright (C) 1998-2001   The R Development Core Team
 *                     Copyright (C) 2002-2004   The R Foundation
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  A copy of the GNU General Public License is available via WWW at
 *  http://www.gnu.org/copyleft/gpl.html.  You can also obtain it by
 *  writing to the Free Software Foundation, Inc., 59 Temple Place,
 *  Suite 330, Boston, MA  02111-1307  USA.
 */

#import "DataManager.h"
#import "RController.h"
#import "REngine/REngine.h"

#import <WebKit/WebKit.h>
#import <WebKit/WebFrame.h>

static id sharedController;

@implementation DataManager

- (void)awakeFromNib
{
    [RDataSource setDoubleAction:@selector(loadRData:)];
    [RDataSource setDataSource: dataSource];
    [dataInfoView setFrameLoadDelegate:self];
}

- (id)init
{
    self = [super init];
    if (self) {
        sharedController = self;
        dataSource = [[SortableDataSource alloc] init];
    }
    
    return self;
}

- (void)dealloc {
    [super dealloc];
}

- (void) resetDatasets
{
    [dataSource reset];
}

- (void) updateDatasets: (int) count withNames: (char**) name descriptions: (char**) desc packages: (char**) pkg URLs: (char**) url
{
    [dataSource reset];
    [dataSource addColumnOfLength:count withUTF8Strings:name name:@"data"];
    [dataSource addColumnOfLength:count withUTF8Strings:desc name:@"description"];
    [dataSource addColumnOfLength:count withUTF8Strings:pkg name:@"package"];
    [dataSource addColumnOfLength:count withUTF8Strings:url name:@"URL"];
    [self show];
}

- (id) window
{
    return DataManagerWindow;
}

+ (DataManager*) sharedController{
    return sharedController;
}

- (void) reloadData
{
    [RDataSource reloadData];
}

- (IBAction)loadRData:(id)sender
{
    int row = [sender selectedRow];
    if(row>=0)
        [[REngine mainEngine] evaluateString:[NSString stringWithFormat:@"data(%@,package=\"%@\")",
            [dataSource objectAtColumn:@"data" row:row], [dataSource objectAtColumn:@"package" row:row]]];
}

- (IBAction)showHelp:(id)sender
{
    int row = [sender selectedRow];
    if (row < 0) return;
    SLog(@"DataManager showHelp: (data=%@, package=%@, static-URL=%@)", [dataSource objectAtColumn:@"data" row:row], [dataSource objectAtColumn:@"package" row:row], [dataSource objectAtColumn:@"URL" row:row]);
#if R_VERSION < R_Version(2, 10, 0)
    NSString *urlText = [NSString stringWithFormat:@"file://%@",[dataSource objectAtColumn:@"URL" row:row]];
#else
    NSString *urlText = nil;
    int port = [[RController sharedController] helpServerPort];
    if (port == 0) {
        NSRunInformationalAlertPanel(NLS(@"Cannot start HTML help server."), NLS(@"Help"), NLS(@"Ok"), nil, nil);
        return;
    }
    NSString *topic = [dataSource objectAtColumn:@"data" row:row];
    NSRange r = [topic rangeOfString:@" ("];
    if (r.length > 0 && [topic length] - r.length > 3) // some datasets have the topic in parents
        topic = [topic substringWithRange: NSMakeRange(r.location + 2, [topic length] - r.location - 3)];
    urlText = [NSString stringWithFormat:@"http://127.0.0.1:%d/library/%@/html/%@.html", port, [dataSource objectAtColumn:@"package" row:row], topic];
#endif
    [[dataInfoView mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlText]]];
}

- (int) count
{
    return [dataSource count];
}

- (void) show
{
    [self reloadData];
    [DataManagerWindow makeKeyAndOrderFront:self];
}

- (void)tableViewSelectionDidChange:(NSNotification *)aNotification
{
    // Check our notification object is our table
    if ([aNotification object] != RDataSource) return;

    // Update Info delayed
    [NSObject cancelPreviousPerformRequestsWithTarget:self 
                            selector:@selector(showHelp:) 
                            object:RDataSource];

    [self performSelector:@selector(showHelp:) withObject:RDataSource afterDelay:0.5];
    
}

- (void)sheetDidEnd:(id)sheet returnCode:(int)returnCode contextInfo:(NSString *)contextInfo
{
    [DataManagerWindow makeKeyAndOrderFront:nil];
}

- (IBAction)printDocument:(id)sender
{

    [NSObject cancelPreviousPerformRequestsWithTarget:self 
                            selector:@selector(showHelp:) 
                            object:RDataSource];

    NSPrintInfo *printInfo;
    NSPrintOperation *printOp;
    
    printInfo = [NSPrintInfo sharedPrintInfo];
    [printInfo setHorizontalPagination: NSFitPagination];
    [printInfo setVerticalPagination: NSAutoPagination];
    [printInfo setVerticallyCentered:NO];
    
    printOp = [NSPrintOperation printOperationWithView:[[[dataInfoView mainFrame] frameView] documentView] 
                                             printInfo:printInfo];
    [printOp setShowPanels:YES];
    [printOp runOperationModalForWindow:[self window] 
                               delegate:self 
                         didRunSelector:@selector(sheetDidEnd:returnCode:contextInfo:) 
                            contextInfo:@""];
}

@end