/******************************************************************************
 * 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) 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.needsDisplay = YES;
    }
}

- (void) controlTextDidEndEditing: (NSNotification *) notification
{
    if (notification.object == fSelectedColorNameField)
    {
       NSInteger index = [GroupsController.groups indexForRow: fTableView.selectedRow];
       [GroupsController.groups setName: fSelectedColorNameField.stringValue forIndex: index];
       fTableView.needsDisplay = 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.prompt = NSLocalizedString(@"Select", "Preferences -> Open panel prompt");
    panel.allowsMultipleSelection = NO;
    panel.canChooseFiles = NO;
    panel.canChooseDirectories = YES;
    panel.canCreateDirectories = 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.enabled = (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.enabled = 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.objectValue = 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.state = NO;
        fAutoAssignRulesEditButton.enabled = 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.state = [GroupsController.groups usesAutoAssignRulesForIndex: index];
    fAutoAssignRulesEditButton.enabled = 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.constant = MIN(requiredRowCount, maxVisibleRowCount) * rowHeight + bordersHeight;
    ruleEditorScrollView.hasVerticalScroller = 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.color = [GroupsController.groups colorForIndex: index];
        fSelectedColorView.enabled = YES;
        fSelectedColorNameField.stringValue = [GroupsController.groups nameForIndex: index];
        fSelectedColorNameField.enabled = YES;

        [self refreshCustomLocationWithSingleGroup];

        fAutoAssignRulesEnableCheck.state = [GroupsController.groups usesAutoAssignRulesForIndex: index];
        fAutoAssignRulesEnableCheck.enabled = YES;
        fAutoAssignRulesEditButton.enabled = (fAutoAssignRulesEnableCheck.state == NSOnState);
    }
    else
    {
        fSelectedColorView.color = NSColor.whiteColor;
        fSelectedColorView.enabled = NO;
        fSelectedColorNameField.stringValue = @"";
        fSelectedColorNameField.enabled = NO;
        fCustomLocationEnableCheck.enabled = NO;
        fCustomLocationPopUp.enabled = NO;
        fAutoAssignRulesEnableCheck.enabled = NO;
        fAutoAssignRulesEditButton.enabled = NO;
    }
}

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

    const BOOL hasCustomLocation = [GroupsController.groups usesCustomDownloadLocationForIndex: index];
    fCustomLocationEnableCheck.state = hasCustomLocation;
    fCustomLocationEnableCheck.enabled = YES;
    fCustomLocationPopUp.enabled = hasCustomLocation;

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

@end