/******************************************************************************
 * Copyright (c) 2007-2012 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#import "GroupsPrefsController.h"
#import "GroupsController.h"
#import "ExpandedPathToPathTransformer.h"
#import "ExpandedPathToIconTransformer.h"
#import "NSApplicationAdditions.h"

#define GROUP_TABLE_VIEW_DATA_TYPE @"GroupTableViewDataType"

#define ADD_TAG 0
#define REMOVE_TAG 1

@interface GroupsPrefsController ()

@property (nonatomic, strong) IBOutlet NSWindow * groupRulesSheetWindow;
@property (nonatomic, weak) IBOutlet NSPredicateEditor * ruleEditor;
@property (nonatomic, weak) IBOutlet NSLayoutConstraint * ruleEditorHeightConstraint;

@end

@interface GroupsPrefsController (Private)

- (void) updateSelectedGroup;
- (void) refreshCustomLocationWithSingleGroup;

@end

@implementation GroupsPrefsController

@synthesize groupRulesSheetWindow;
@synthesize ruleEditor;
@synthesize ruleEditorHeightConstraint;

- (void) awakeFromNib
{
    [fTableView registerForDraggedTypes: @[GROUP_TABLE_VIEW_DATA_TYPE]];

    [fSelectedColorView addObserver: self forKeyPath: @"color" options: 0 context: NULL];

    [self updateSelectedGroup];
}

- (NSInteger) numberOfRowsInTableView: (NSTableView *) tableview
{
    return [[GroupsController groups] numberOfGroups];
}

- (id) tableView: (NSTableView *) tableView objectValueForTableColumn: (NSTableColumn *) tableColumn row: (NSInteger) row
{
    GroupsController * groupsController = [GroupsController groups];
    NSInteger groupsIndex = [groupsController indexForRow: row];

    NSString * identifier = [tableColumn identifier];
    if ([identifier isEqualToString: @"Color"])
        return [groupsController imageForIndex: groupsIndex];
    else
        return [groupsController nameForIndex: groupsIndex];
}

- (void) tableViewSelectionDidChange: (NSNotification *) notification
{
    [self updateSelectedGroup];
}

- (void) observeValueForKeyPath: (NSString *) keyPath ofObject: (id) object change: (NSDictionary *) change context: (void *) context
{
    if (object == fSelectedColorView && [fTableView numberOfSelectedRows] == 1)
    {
       NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
       [[GroupsController groups] setColor: [fSelectedColorView color] forIndex: index];
       [fTableView setNeedsDisplay: YES];
    }
}

- (void) controlTextDidEndEditing: (NSNotification *) notification
{
    if ([notification object] == fSelectedColorNameField)
    {
       NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
       [[GroupsController groups] setName: [fSelectedColorNameField stringValue] forIndex: index];
       [fTableView setNeedsDisplay: YES];
    }
}

- (BOOL) tableView: (NSTableView *) tableView writeRowsWithIndexes: (NSIndexSet *) rowIndexes toPasteboard: (NSPasteboard *) pboard
{
    [pboard declareTypes: @[GROUP_TABLE_VIEW_DATA_TYPE] owner: self];
    [pboard setData: [NSKeyedArchiver archivedDataWithRootObject: rowIndexes] forType: GROUP_TABLE_VIEW_DATA_TYPE];
    return YES;
}

- (NSDragOperation) tableView: (NSTableView *) tableView validateDrop: (id <NSDraggingInfo>) info
    proposedRow: (NSInteger) row proposedDropOperation: (NSTableViewDropOperation) operation
{
    NSPasteboard * pasteboard = [info draggingPasteboard];
    if ([[pasteboard types] containsObject: GROUP_TABLE_VIEW_DATA_TYPE])
    {
        [fTableView setDropRow: row dropOperation: NSTableViewDropAbove];
        return NSDragOperationGeneric;
    }

    return NSDragOperationNone;
}

- (BOOL) tableView: (NSTableView *) tableView acceptDrop: (id <NSDraggingInfo>) info row: (NSInteger) newRow
    dropOperation: (NSTableViewDropOperation) operation
{
    NSPasteboard * pasteboard = [info draggingPasteboard];
    if ([[pasteboard types] containsObject: GROUP_TABLE_VIEW_DATA_TYPE])
    {
        NSIndexSet * indexes = [NSKeyedUnarchiver unarchiveObjectWithData: [pasteboard dataForType: GROUP_TABLE_VIEW_DATA_TYPE]];
        NSInteger oldRow = [indexes firstIndex];

        if (oldRow < newRow)
            newRow--;

        [fTableView beginUpdates];

        [[GroupsController groups] moveGroupAtRow: oldRow toRow: newRow];

        [fTableView moveRowAtIndex: oldRow toIndex: newRow];
        [fTableView endUpdates];
    }

    return YES;
}

- (void) addRemoveGroup: (id) sender
{
    if ([NSColorPanel sharedColorPanelExists])
        [[NSColorPanel sharedColorPanel] close];

    NSInteger row;

    switch ([[sender cell] tagForSegment: [sender selectedSegment]])
    {
        case ADD_TAG:
            [fTableView beginUpdates];

            [[GroupsController groups] addNewGroup];

            row = [fTableView numberOfRows];

            [fTableView insertRowsAtIndexes: [NSIndexSet indexSetWithIndex: row] withAnimation: NSTableViewAnimationSlideUp];
            [fTableView endUpdates];

            [fTableView selectRowIndexes: [NSIndexSet indexSetWithIndex: row] byExtendingSelection: NO];
            [fTableView scrollRowToVisible: row];

            [[fSelectedColorNameField window] makeFirstResponder: fSelectedColorNameField];

            break;

        case REMOVE_TAG:
            row = [fTableView selectedRow];


            [fTableView beginUpdates];

            [[GroupsController groups] removeGroupWithRowIndex: row];

            [fTableView removeRowsAtIndexes: [NSIndexSet indexSetWithIndex: row] withAnimation: NSTableViewAnimationSlideUp];
            [fTableView endUpdates];

            if ([fTableView numberOfRows] > 0)
            {
                if (row == [fTableView numberOfRows])
                    --row;
                [fTableView selectRowIndexes: [NSIndexSet indexSetWithIndex: row] byExtendingSelection: NO];
                [fTableView scrollRowToVisible: row];
            }

            break;
    }

    [self updateSelectedGroup];
}

- (void) customDownloadLocationSheetShow: (id) sender
{
    NSOpenPanel * panel = [NSOpenPanel openPanel];

    [panel setPrompt: NSLocalizedString(@"Select", "Preferences -> Open panel prompt")];
    [panel setAllowsMultipleSelection: NO];
    [panel setCanChooseFiles: NO];
    [panel setCanChooseDirectories: YES];
    [panel setCanCreateDirectories: YES];

    [panel beginSheetModalForWindow: [fCustomLocationPopUp window] completionHandler: ^(NSInteger result) {
        const NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
        if (result == NSFileHandlingPanelOKButton)
        {
            NSString * path = [[panel URLs][0] path];
            [[GroupsController groups] setCustomDownloadLocation: path forIndex: index];
            [[GroupsController groups] setUsesCustomDownloadLocation: YES forIndex: index];
        }
        else
        {
            if (![[GroupsController groups] customDownloadLocationForIndex: index])
                [[GroupsController groups] setUsesCustomDownloadLocation: NO forIndex: index];
        }

        [self refreshCustomLocationWithSingleGroup];

        [fCustomLocationPopUp selectItemAtIndex: 0];
    }];
}

- (IBAction) toggleUseCustomDownloadLocation: (id) sender
{
    NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
    if ([fCustomLocationEnableCheck state] == NSOnState)
    {
        if ([[GroupsController groups] customDownloadLocationForIndex: index])
            [[GroupsController groups] setUsesCustomDownloadLocation: YES forIndex: index];
        else
            [self customDownloadLocationSheetShow: nil];
    }
    else
        [[GroupsController groups] setUsesCustomDownloadLocation: NO forIndex: index];

    [fCustomLocationPopUp setEnabled: ([fCustomLocationEnableCheck state] == NSOnState)];
}

#pragma mark -
#pragma mark Rule editor

- (IBAction) toggleUseAutoAssignRules: (id) sender
{
    NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
    if ([fAutoAssignRulesEnableCheck state] == NSOnState)
    {
        if ([[GroupsController groups] autoAssignRulesForIndex: index])
            [[GroupsController groups] setUsesAutoAssignRules: YES forIndex: index];
        else
            [self orderFrontRulesSheet: nil];
    }
    else
        [[GroupsController groups] setUsesAutoAssignRules: NO forIndex: index];

    [fAutoAssignRulesEditButton setEnabled: [fAutoAssignRulesEnableCheck state] == NSOnState];
}

- (IBAction) orderFrontRulesSheet: (id) sender
{
    if (!self.groupRulesSheetWindow)
        [[NSBundle mainBundle] loadNibNamed: @"GroupRules" owner: self topLevelObjects: NULL];

    NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
    NSPredicate *predicate = [[GroupsController groups] autoAssignRulesForIndex: index];
    [self.ruleEditor setObjectValue: predicate];

    if ([self.ruleEditor numberOfRows] == 0)
        [self.ruleEditor addRow: nil];

    [fTableView.window beginSheet:self.groupRulesSheetWindow completionHandler:nil];
}

- (IBAction) cancelRules: (id) sender
{
    [self.groupRulesSheetWindow orderOut: nil];
    [NSApp endSheet: self.groupRulesSheetWindow];

    NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
    if (![[GroupsController groups] autoAssignRulesForIndex: index])
    {
        [[GroupsController groups] setUsesAutoAssignRules: NO forIndex: index];
        [fAutoAssignRulesEnableCheck setState: NO];
        [fAutoAssignRulesEditButton setEnabled: NO];
    }
}

- (IBAction) saveRules: (id) sender
{
    [self.groupRulesSheetWindow orderOut: nil];
    [NSApp endSheet: self.groupRulesSheetWindow];

    NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
    [[GroupsController groups] setUsesAutoAssignRules: YES forIndex: index];

    NSPredicate * predicate = [self.ruleEditor objectValue];
    [[GroupsController groups] setAutoAssignRules: predicate forIndex: index];

    [fAutoAssignRulesEnableCheck setState: [[GroupsController groups] usesAutoAssignRulesForIndex: index]];
    [fAutoAssignRulesEditButton setEnabled: [fAutoAssignRulesEnableCheck state] == NSOnState];
}

- (void) ruleEditorRowsDidChange: (NSNotification *) notification
{
    NSScrollView * ruleEditorScrollView = [self.ruleEditor enclosingScrollView];

    const CGFloat rowHeight = [self.ruleEditor rowHeight];
    const CGFloat bordersHeight = [ruleEditorScrollView frame].size.height - [ruleEditorScrollView contentSize].height;

    const CGFloat requiredRowCount = [self.ruleEditor numberOfRows];
    const CGFloat maxVisibleRowCount = (long)((NSHeight([[[self.ruleEditor window] screen] visibleFrame]) * 2 / 3) / rowHeight);

    [self.ruleEditorHeightConstraint setConstant: MIN(requiredRowCount, maxVisibleRowCount) * rowHeight + bordersHeight];
    [ruleEditorScrollView setHasVerticalScroller: requiredRowCount > maxVisibleRowCount];
}

@end

@implementation GroupsPrefsController (Private)

- (void) updateSelectedGroup
{
    [fAddRemoveControl setEnabled: [fTableView numberOfSelectedRows] > 0 forSegment: REMOVE_TAG];
    if ([fTableView numberOfSelectedRows] == 1)
    {
        const NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];
        [fSelectedColorView setColor: [[GroupsController groups] colorForIndex: index]];
        [fSelectedColorView setEnabled: YES];
        [fSelectedColorNameField setStringValue: [[GroupsController groups] nameForIndex: index]];
        [fSelectedColorNameField setEnabled: YES];

        [self refreshCustomLocationWithSingleGroup];

        [fAutoAssignRulesEnableCheck setState: [[GroupsController groups] usesAutoAssignRulesForIndex: index]];
        [fAutoAssignRulesEnableCheck setEnabled: YES];
        [fAutoAssignRulesEditButton setEnabled: ([fAutoAssignRulesEnableCheck state] == NSOnState)];
    }
    else
    {
        [fSelectedColorView setColor: [NSColor whiteColor]];
        [fSelectedColorView setEnabled: NO];
        [fSelectedColorNameField setStringValue: @""];
        [fSelectedColorNameField setEnabled: NO];
        [fCustomLocationEnableCheck setEnabled: NO];
        [fCustomLocationPopUp setEnabled: NO];
        [fAutoAssignRulesEnableCheck setEnabled: NO];
        [fAutoAssignRulesEditButton setEnabled: NO];
    }
}

- (void) refreshCustomLocationWithSingleGroup
{
    const NSInteger index = [[GroupsController groups] indexForRow: [fTableView selectedRow]];

    const BOOL hasCustomLocation = [[GroupsController groups] usesCustomDownloadLocationForIndex: index];
    [fCustomLocationEnableCheck setState: hasCustomLocation];
    [fCustomLocationEnableCheck setEnabled: YES];
    [fCustomLocationPopUp setEnabled: hasCustomLocation];

    NSString * location = [[GroupsController groups] customDownloadLocationForIndex: index];
    if (location)
    {
        ExpandedPathToPathTransformer * pathTransformer = [[ExpandedPathToPathTransformer alloc] init];
        [[fCustomLocationPopUp itemAtIndex: 0] setTitle: [pathTransformer transformedValue: location]];
        ExpandedPathToIconTransformer * iconTransformer = [[ExpandedPathToIconTransformer alloc] init];
        [[fCustomLocationPopUp itemAtIndex: 0] setImage: [iconTransformer transformedValue: location]];
    }
    else
    {
        [[fCustomLocationPopUp itemAtIndex: 0] setTitle: @""];
        [[fCustomLocationPopUp itemAtIndex: 0] setImage: nil];
    }
}

@end
