//
//  $Id$
//
//  SPConnectionControllerDelegate.m
//  sequel-pro
//
//  Created by Stuart Connolly (stuconnolly.com) on November 9, 2010
//  Copyright (c) 2010 Stuart Connolly. All rights reserved.
//
//  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.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//  More info at <http://code.google.com/p/sequel-pro/>

#import "SPConnectionControllerDelegate.h"
#import "SPFavoritesController.h"
#import "SPTableTextFieldCell.h"
#import "SPPreferenceController.h"
#import "SPGeneralPreferencePane.h"
#import "SPAppController.h"
#import "SPFavoriteNode.h"
#import "SPGroupNode.h"
#import "SPTreeNode.h"

static NSString *SPDatabaseImage = @"database-small";

@interface SPConnectionController ()

- (void)_checkHost;
- (void)_sortFavorites;
- (void)_favoriteTypeDidChange;
- (void)_reloadFavoritesViewData;
- (void)_updateFavoritePasswordsFromField:(NSControl *)control;

- (NSString *)_stripInvalidCharactersFromString:(NSString *)subject;

- (void)_resetConnectionDetailsInputInterface;
- (void)_setNodeIsExpanded:(BOOL)expanded fromNotification:(NSNotification *)notification;

@end

@implementation SPConnectionController (SPConnectionControllerDelegate)

#pragma mark -
#pragma mark SplitView delegate methods

- (NSRect)splitView:(NSSplitView *)splitView additionalEffectiveRectOfDividerAtIndex:(NSInteger)dividerIndex
{
	return [connectionSplitViewButtonBar splitView:splitView additionalEffectiveRectOfDividerAtIndex:dividerIndex];
}

/**
 * When the split view is resized, trigger a resize in the hidden table
 * width as well, to keep the connection view and connected view in sync.
 */
- (void)splitViewDidResizeSubviews:(NSNotification *)notification
{
	[databaseConnectionView setPosition:[[[connectionSplitView subviews] objectAtIndex:0] frame].size.width ofDividerAtIndex:0];
}

#pragma mark -
#pragma mark Outline view delegate methods

- (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item
{		
	return ([[(SPTreeNode *)item parentNode] parentNode] == nil);
}

- (void)outlineViewSelectionDidChange:(NSNotification *)notification
{				
	NSInteger selected = [favoritesOutlineView numberOfSelectedRows];
	
	if (selected == 1) {

		SPTreeNode *node = [self selectedFavoriteNode];
		
		if (![node isGroup]) {
			[self updateFavoriteSelection:self];
			
			[addToFavoritesButton setEnabled:NO];
			
			favoriteNameFieldWasTouched = YES;
		}
		else {	
			[addToFavoritesButton setEnabled:YES];
			
			[self _resetConnectionDetailsInputInterface];
		}
		
		[connectionResizeContainer setHidden:NO];
		[connectionInstructionsTextField setStringValue:NSLocalizedString(@"Enter connection details below, or choose a favorite", @"enter connection details label")];
	}
	else if (selected > 1) {
		[connectionResizeContainer setHidden:YES];
		[connectionInstructionsTextField setStringValue:NSLocalizedString(@"Please choose a favorite", @"please choose a favorite connection view label")];		
	}
}

- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item
{
	SPTreeNode *node = (SPTreeNode *)item;
	
	[(SPTableTextFieldCell *)cell setFont:[NSFont systemFontOfSize:[NSFont smallSystemFontSize]]];
	[(SPTableTextFieldCell *)cell setImage:(![[node parentNode] parentNode]) ? nil : (![node isGroup]) ? [NSImage imageNamed:SPDatabaseImage] : folderImage];
}

- (CGFloat)outlineView:(NSOutlineView *)outlineView heightOfRowByItem:(id)item
{
	return ([[item parentNode] parentNode]) ? 17 : 22;
}

- (NSString *)outlineView:(NSOutlineView *)outlineView toolTipForCell:(NSCell *)cell rect:(NSRectPointer)rect tableColumn:(NSTableColumn *)tableColumn item:(id)item mouseLocation:(NSPoint)mouseLocation
{
	NSString *toolTip = nil;
	
	SPTreeNode *node = (SPTreeNode *)item;
	
	if (![node isGroup]) {
		
		NSString *favoriteName = [[[node representedObject] nodeFavorite] objectForKey:SPFavoriteNameKey];
		NSString *favoriteHostname = [[[node representedObject] nodeFavorite] objectForKey:SPFavoriteHostKey];
		
		toolTip = ([favoriteHostname length]) ? [NSString stringWithFormat:@"%@ (%@)", favoriteName, favoriteHostname] : favoriteName;	
	}

	// Only display a tooltip for group nodes that are a descendant of the root node
	else if ([[node parentNode] parentNode]) {
		NSUInteger favCount = 0;
		NSUInteger groupCount = 0;
		for (SPTreeNode *eachNode in [node childNodes]) {
			if ([eachNode isGroup]) {
				groupCount++;
			} else {
				favCount++;
			}
		}

		NSMutableArray *tooltipParts = [NSMutableArray arrayWithCapacity:2];
		if (favCount || !groupCount) {
			[tooltipParts addObject:[NSString stringWithFormat:@"%d %@", favCount, (favCount == 1) ? NSLocalizedString(@"favorite", @"favorite singular label") : NSLocalizedString(@"favorites", @"favorites plural label")]];
		}
		if (groupCount) {
			[tooltipParts addObject:[NSString stringWithFormat:@"%d %@", groupCount, (groupCount == 1) ? NSLocalizedString(@"group", @"favorite group singular label") : NSLocalizedString(@"groups", @"favorite groups plural label")]];
		}

		toolTip = [NSString stringWithFormat:@"%@ - %@", [[node representedObject] nodeName], [tooltipParts componentsJoinedByString:@", "]];
	}
	
	return toolTip;
}

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item
{	
	return ([[item parentNode] parentNode] != nil);
}

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldShowOutlineCellForItem:(id)item
{
	return ([[item parentNode] parentNode] != nil);
}

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldCollapseItem:(id)item
{
	return ([[item parentNode] parentNode] != nil);
}

- (void)outlineViewItemDidCollapse:(NSNotification *)notification
{	
	[self _setNodeIsExpanded:NO fromNotification:notification];
}

- (void)outlineViewItemDidExpand:(NSNotification *)notification
{
	[self _setNodeIsExpanded:YES fromNotification:notification];
}

#pragma mark -
#pragma mark Outline view drag & drop

- (BOOL)outlineView:(NSOutlineView *)outlineView writeItems:(NSArray *)items toPasteboard:(NSPasteboard *)pboard
{

	// Prevent a drag which includes the outline title group from taking place
	for (id item in items) {
		if (![[item parentNode] parentNode]) return NO;
	}

	// If the user is in the process of changing a node's name, trigger a save and prevent dragging.
	if (isEditing) {
		[favoritesController saveFavorites];
		
		[self _reloadFavoritesViewData];
		
		isEditing = NO;
		
		return NO;
	}
		
	[pboard declareTypes:[NSArray arrayWithObject:SPFavoritesPasteboardDragType] owner:self];

	BOOL result = [pboard setData:[NSData data] forType:SPFavoritesPasteboardDragType];
	
	draggedNodes = items;
	
	return result;
}

- (NSDragOperation)outlineView:(NSOutlineView *)outlineView validateDrop:(id <NSDraggingInfo>)info proposedItem:(id)item proposedChildIndex:(NSInteger)childIndex
{
	NSDragOperation result = NSDragOperationNone;
	
	// Prevent dropping favorites on other favorites (non-groups)
	if ((childIndex == NSOutlineViewDropOnItemIndex) && (![item isGroup])) return result;

	// Ensure that none of the dragged nodes are being dragged into children of themselves; if they are,
	// prevent the drag.
	id itemToCheck = item;
	do {
		if ([draggedNodes containsObject:itemToCheck]) {
			return result;
		}
	} while ((itemToCheck = [itemToCheck parentNode]));

	if ([info draggingSource] == outlineView) {
		[outlineView setDropItem:item dropChildIndex:childIndex];
		
		result = NSDragOperationMove;
	}
	
	return result;
}

- (BOOL)outlineView:(NSOutlineView *)outlineView acceptDrop:(id <NSDraggingInfo>)info item:(id)item childIndex:(NSInteger)childIndex
{
	BOOL acceptedDrop = NO;
	
	if ((!item) || ([info draggingSource] != outlineView)) return acceptedDrop;
	
	SPTreeNode *node = item ? item : [[[[favoritesRoot childNodes] objectAtIndex:0] childNodes] objectAtIndex:0];

	// Cache the selected nodes for selection restoration afterwards
	NSArray *preDragSelection = [self selectedFavoriteNodes];

	// Disable all automatic sorting
	currentSortItem = -1;
	reverseFavoritesSort = NO;
	
	[prefs setInteger:currentSortItem forKey:SPFavoritesSortedBy];
	[prefs setBool:NO forKey:SPFavoritesSortedInReverse];
	
	// Uncheck sort by menu items
	for (NSMenuItem *menuItem in [[favoritesSortByMenuItem submenu] itemArray])
	{
		[menuItem setState:NSOffState];
	}
	
	if (![draggedNodes count]) return acceptedDrop;
	
	if ([node isGroup]) {		
		if (childIndex == NSOutlineViewDropOnItemIndex) {
			childIndex = 0;
		}
	}
	else {
		if (childIndex == NSOutlineViewDropOnItemIndex) {
			childIndex = 0;
		}
	}
	
	if (![[node representedObject] nodeName]) {
		node = [[favoritesRoot childNodes] objectAtIndex:0];
	}
			
	NSMutableArray *childNodeArray = [node mutableChildNodes];
	
    for (SPTreeNode *treeNode in draggedNodes) 
	{
        // Remove the node from its old location
        NSInteger oldIndex = [childNodeArray indexOfObject:treeNode];
        NSInteger newIndex = childIndex;
        
		if (oldIndex != NSNotFound) {
			
            [childNodeArray removeObjectAtIndex:oldIndex];
            
			if (childIndex > oldIndex) {
                newIndex--;
            }
        } 
		else {
            [[[treeNode parentNode] mutableChildNodes] removeObject:treeNode];
        }
				        
		[childNodeArray insertObject:treeNode atIndex:newIndex];
        
		newIndex++;
    }
		
	[favoritesController saveFavorites];
	
	[self _reloadFavoritesViewData];

	[[NSNotificationCenter defaultCenter] postNotificationName:SPConnectionFavoritesChangedNotification object:self];

	[[[[NSApp delegate] preferenceController] generalPreferencePane] updateDefaultFavoritePopup];

	// Update the selection to account for rearranged faourites
	NSMutableIndexSet *restoredSelection = [NSMutableIndexSet indexSet];
	for (SPTreeNode *eachNode in preDragSelection) {
		[restoredSelection addIndex:[favoritesOutlineView rowForItem:eachNode]];
	}
	[favoritesOutlineView selectRowIndexes:restoredSelection byExtendingSelection:NO];

	acceptedDrop = YES;
	
	return acceptedDrop;
}

#pragma mark -
#pragma mark Textfield delegate methods

/**
 * Trap and control the 'name' field of the selected favorite. If the user pressed
 * 'Add Favorite' the 'name' field is set to 'New Favorite'. If the user did not
 * change the 'name' field or delete that field it will be set to user@host automatically.
 */
- (void)controlTextDidChange:(NSNotification *)notification
{
	id field = [notification object];
	
	if (((field == standardNameField) || (field == socketNameField) || (field == sshNameField)) && [self selectedFavoriteNode]) {
		
		[field setStringValue:[self _stripInvalidCharactersFromString:[field stringValue]]];
		
		favoriteNameFieldWasTouched = YES;
		
		BOOL nameFieldIsEmpty = [[field stringValue] isEqualToString:@""];
		
		switch (previousType) 
		{
			case SPTCPIPConnection:
				
				nameFieldIsEmpty = (nameFieldIsEmpty || [[standardNameField stringValue] isEqualToString:@""]);
				
				if (nameFieldIsEmpty || (!favoriteNameFieldWasTouched && (field == standardUserField || field == standardSQLHostField))) {
					[standardNameField setStringValue:[NSString stringWithFormat:@"%@@%@", [standardUserField stringValue], [standardSQLHostField stringValue]]];
					
					// Trigger KVO update
					[self setName:[standardNameField stringValue]];
					
					// If name field is empty enable user@host update
					if (nameFieldIsEmpty) favoriteNameFieldWasTouched = NO;
				}
				
				break;
			case SPSocketConnection:
				
				nameFieldIsEmpty = (nameFieldIsEmpty || [[socketNameField stringValue] isEqualToString:@""]);
				
				if (nameFieldIsEmpty || (!favoriteNameFieldWasTouched && field == socketUserField)) {
					[socketNameField setStringValue:[NSString stringWithFormat:@"%@@localhost", [socketUserField stringValue]]];
										
					// Trigger KVO update
					[self setName:[socketNameField stringValue]];
					
					// If name field is empty enable user@host update
					if (nameFieldIsEmpty) favoriteNameFieldWasTouched = NO;
				}
				
				break;
			case SPSSHTunnelConnection:
				
				nameFieldIsEmpty = (nameFieldIsEmpty || [[sshNameField stringValue] isEqualToString:@""]);
				
				if (nameFieldIsEmpty || (!favoriteNameFieldWasTouched && (field == sshUserField || field == sshSQLHostField))) {
					[sshNameField setStringValue:[NSString stringWithFormat:@"%@@%@", [sshUserField stringValue], [sshSQLHostField stringValue]]];
					
					// Trigger KVO update
					[self setName:[sshNameField stringValue]];
					
					// If name field is empty enable user@host update
					if (nameFieldIsEmpty) favoriteNameFieldWasTouched = NO;
				}
				
				break;
		}
	}
}

/**
 * When a host field finishes editing, ensure that it hasn't been set to "localhost"
 * to ensure that socket connections don't inadvertently occur.
 */
- (void)controlTextDidEndEditing:(NSNotification *)notification
{
	if ([notification object] == standardSQLHostField || [notification object] == sshSQLHostField) {
		[self _checkHost];
	}
}

/**
 * Trap editing end notifications and use them to update the keychain password
 * appropriately when name, host, user, password or database changes.
 */
- (BOOL)control:(NSControl *)control textShouldEndEditing:(NSText *)fieldEditor
{
	// Request a password refresh to keep keychain references in sync with favorites, but only if a favorite
	// is selected, meaning we're editing an existing one, not a new one.
	if (((id)control != (id)favoritesOutlineView) && ([self selectedFavoriteNode])) {
		[self _updateFavoritePasswordsFromField:control];
	}
	
	// Proceed with editing
	return YES;
}

#pragma mark -
#pragma mark Tab bar delegate methods

/**
 * Trigger a resize action whenever the tab view changes. The connection
 * detail forms are held within container views, which are of a fixed width;
 * the tabview and buttons are contained within a resizable view which
 * is set to dimensions based on the container views, allowing the view
 * to be sized according to the detail type.
 */
- (void)tabView:(NSTabView *)tabView didSelectTabViewItem:(NSTabViewItem *)tabViewItem
{
	NSInteger selectedTabView = [tabView indexOfTabViewItem:tabViewItem];
		
	if (selectedTabView == previousType) return;
	
	[self resizeTabViewToConnectionType:selectedTabView animating:YES];
	
	// Update the host as appropriate
	if ((selectedTabView != SPSocketConnection) && [[self host] isEqualToString:@"localhost"]) {
		[self setHost:@""];
	}
	
	previousType = selectedTabView;
	
	// Enable the add to favorites button
	[addToFavoritesButton setEnabled:YES];
	
	[self _favoriteTypeDidChange];
}

#pragma mark -
#pragma mark Scroll view notifications

/**
 * As the scrollview resizes, keep the details centered within it if
 * the detail frame is larger than the scrollview size; otherwise, pin
 * the detail frame to the top of the scrollview.
 */
- (void)scrollViewFrameChanged:(NSNotification *)aNotification
{
	NSRect scrollViewFrame = [connectionDetailsScrollView frame];
	NSRect scrollDocumentFrame = [[connectionDetailsScrollView documentView] frame];
	NSRect connectionDetailsFrame = [connectionResizeContainer frame];
	
	// Scroll view is smaller than contents - keep positioned at top.
	if (scrollViewFrame.size.height < connectionDetailsFrame.size.height + 10) {
		if (connectionDetailsFrame.origin.y != 0) {
			connectionDetailsFrame.origin.y = 0;
			[connectionResizeContainer setFrame:connectionDetailsFrame];
			scrollDocumentFrame.size.height = connectionDetailsFrame.size.height + 10;
			[[connectionDetailsScrollView documentView] setFrame:scrollDocumentFrame];
		}
	}
	// Otherwise, center
	else {
		connectionDetailsFrame.origin.y = (scrollViewFrame.size.height - connectionDetailsFrame.size.height)/3;
		[connectionResizeContainer setFrame:connectionDetailsFrame];
		scrollDocumentFrame.size.height = scrollViewFrame.size.height;
		[[connectionDetailsScrollView documentView] setFrame:scrollDocumentFrame];
	}
}

#pragma mark -
#pragma mark Menu Validation

/**
 * Menu item validation.
 */
- (BOOL)validateMenuItem:(NSMenuItem *)menuItem
{
	SEL action = [menuItem action];
	
	SPTreeNode *node = [self selectedFavoriteNode];
	NSInteger selectedRows = [favoritesOutlineView numberOfSelectedRows];
	
	if ((action == @selector(sortFavorites:)) || (action == @selector(reverseSortFavorites:))) {
		
		if ([[favoritesRoot allChildLeafs] count] < 2) return NO;
		
		// Loop all the items in the sort by menu only checking the currently selected one
		for (NSMenuItem *item in [[menuItem menu] itemArray])
		{
			[item setState:([[menuItem menu] indexOfItem:item] == currentSortItem)];
		}
		
		// Check or uncheck the reverse sort item
		if (action == @selector(reverseSortFavorites:)) {
			[menuItem setState:reverseFavoritesSort];
		}
	}
	
	// Remove/rename the selected node
	if (action == @selector(removeNode:) || action == @selector(renameNode:)) {
		return selectedRows == 1;
	}
	
	// Duplicate and make the selected favorite the default
	if (action == @selector(duplicateFavorite:)) {
		return ((selectedRows == 1) && (![node isGroup]));
	}
	
	// Make selected favorite the default
	if (action == @selector(makeSelectedFavoriteDefault:)) {
		NSInteger favoriteID = [[[self selectedFavorite] objectForKey:SPFavoriteIDKey] integerValue];
				
		return ((selectedRows == 1) && (![node isGroup]) && (favoriteID != [prefs integerForKey:SPDefaultFavorite]));
	}
	
	// Favorites export
	if (action == @selector(exportFavorites:)) {
				
		if ([[favoritesRoot allChildLeafs] count] == 0) {
			return NO;
		}
		else if (selectedRows == 1) {
			return (![[self selectedFavoriteNode] isGroup]);
		}
		else if (selectedRows > 1) {
			[menuItem setTitle:NSLocalizedString(@"Export Selected...", @"export selected favorites menu item")];
		}
	}
		
    return YES;
}

#pragma mark -
#pragma mark Favorites import/export delegate methods

/**
 * Called by the favorites exporter when the export completes.
 */
- (void)favoritesExportCompletedWithError:(NSError *)error
{	
	if (error) {
		NSAlert *alert = [NSAlert alertWithMessageText:NSLocalizedString(@"Favorites export error", @"favorites export error message")
										 defaultButton:NSLocalizedString(@"OK", @"OK")
									   alternateButton:nil 
										   otherButton:nil 
							 informativeTextWithFormat:[NSString stringWithFormat:NSLocalizedString(@"The following error occurred during the export process:\n\n%@", @"favorites export error informative message"), [error localizedDescription]]];
		
		[alert beginSheetModalForWindow:[dbDocument parentWindow] 
						  modalDelegate:self
						 didEndSelector:NULL
							contextInfo:NULL];			
	}
}

/**
 * Called by the favorites importer when the imported data is available.
 */
- (void)favoritesImportData:(NSArray *)data
{
	// Add each of the imported favorites to the root node
	for (NSMutableDictionary *favorite in data)
	{
		[favoritesController addFavoriteNodeWithData:favorite asChildOfNode:nil];
	}
	
	if (currentSortItem > SPFavoritesSortUnsorted) {
		[self _sortFavorites];
	}
	
	[self _reloadFavoritesViewData];
}

/**
 * Called by the favorites importer when the import completes.
 */
- (void)favoritesImportCompletedWithError:(NSError *)error
{	
	if (error) {
		NSAlert *alert = [NSAlert alertWithMessageText:NSLocalizedString(@"Favorites import error", @"favorites import error message")
										 defaultButton:NSLocalizedString(@"OK", @"OK")
									   alternateButton:nil 
										   otherButton:nil 
							 informativeTextWithFormat:[NSString stringWithFormat:NSLocalizedString(@"The following error occurred during the import process:\n\n%@", @"favorites import error informative message"), [error localizedDescription]]];	
		
		[alert beginSheetModalForWindow:[dbDocument parentWindow] 
						  modalDelegate:self
						 didEndSelector:NULL
							contextInfo:NULL];
	}
}

#pragma mark -
#pragma mark Private API

/**
 * Sets the expanded state of the node from the supplied outline view notification.
 *
 * @param expanded     The state of the node
 * @param notification The notification genrated from the state change
 */
- (void)_setNodeIsExpanded:(BOOL)expanded fromNotification:(NSNotification *)notification
{
	SPGroupNode *node = [[[notification userInfo] valueForKey:@"NSObject"] representedObject];
	
	[node setNodeIsExpanded:expanded];	
}

@end