//
//  Document.m
//  Brainfuck
//
//  Created by Kim Wittenburg on 20.05.13.
//  Copyright (c) 2013 brainfuck. All rights reserved.
//

#import "Document.h"

#import "AppDelegate.h"

#import "Interpreter.h"

@implementation Document {
    NSString *changedCharacters;
    NSInteger insertLocation;
}

@synthesize editorView;
@synthesize inputView;
@synthesize outputView;

@synthesize text;

- (id)init
{
    self = [super init];
    if (self) {
        // Add your subclass-specific initialization here.
    }
    return self;
}

- (NSString *)windowNibName
{
    return @"Document";
}

- (void)windowControllerDidLoadNib:(NSWindowController *)aController
{
    [super windowControllerDidLoadNib:aController];
    editorView.textStorage.delegate = self;
    if (!self.text) {
        NSString *defaultFilePath = [[NSBundle mainBundle].resourcePath stringByAppendingPathComponent:@"Default.brainfuck"];
        self.text = [NSString stringWithContentsOfFile:defaultFilePath encoding:NSASCIIStringEncoding error:nil];
    }
    [self updateColors];
}

+ (BOOL)autosavesInPlace
{
    return YES;
}

- (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError
{
    return [self.text dataUsingEncoding:NSASCIIStringEncoding];
}

- (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError
{
    self.text = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
    return YES;
}

- (NSPrintOperation *)printOperationWithSettings:(NSDictionary *)printSettings error:(NSError *__autoreleasing *)outError
{
    NSPrintOperation *op = [NSPrintOperation printOperationWithView:self.editorView];
    [self updateColors];
    return op;
}

- (IBAction)executeScript:(id)sender
{
    self.outputView.string = @"";
    Interpreter *interpreter = [Interpreter interpreter];
    interpreter.printer = self;
    [interpreter execute:self.editorView.string withInput:self.inputView.stringValue error:nil];
}

- (void)updateColors
{
    changedCharacters = self.editorView.string;
    insertLocation = 0;
    [self addTextStorageAttributes:self.editorView.textStorage];
}

#pragma mark - Window delegate

- (void)windowDidResignKey:(NSNotification *)notification
{
    [self updateColors];
}

#pragma mark - Text storage delegate

- (void)textStorageDidProcessEditing:(NSNotification *)notification
{
    [self addTextStorageAttributes:notification.object];
}

- (void)addTextStorageAttributes:(NSTextStorage *)storage
{
    if (!changedCharacters) {
        return;
    }
    NSData *foregroundData;
    NSColor *foreground;
    for (NSInteger i = 0; i < changedCharacters.length; ) {
        NSInteger loc = insertLocation + i;
        NSInteger len = 1;
        unichar c = [changedCharacters characterAtIndex:i];
        while (changedCharacters.length > ++i && [changedCharacters characterAtIndex:i] == c)
            len++;
        foregroundData = [[NSUserDefaults standardUserDefaults] objectForKey:[NSString stringWithFormat:@"\\%c", c]];
        if (!foregroundData) {
            foregroundData = [[NSUserDefaults standardUserDefaults] objectForKey:@"default"];
        }
        foreground = [NSUnarchiver unarchiveObjectWithData:foregroundData];
        [storage addAttribute:NSForegroundColorAttributeName value:foreground range:NSMakeRange(loc, len)];
    }
    changedCharacters = nil;
}

#pragma mark - Text view delegate

- (BOOL)textView:(NSTextView *)textView shouldChangeTextInRange:(NSRange)affectedCharRange replacementString:(NSString *)replacementString
{
    if (replacementString.length == 0) {
        changedCharacters = nil;
    } else {
        changedCharacters = replacementString;
        insertLocation = affectedCharRange.location;
    }
    return YES;
}

#pragma mark - Printer

- (void)print:(NSString *)string
{
    self.outputView.string = [self.outputView.string stringByAppendingString:string];
}

#pragma mark - Split view delegate

- (CGFloat)splitView:(NSSplitView *)splitView constrainMinCoordinate:(CGFloat)proposedMinimumPosition ofSubviewAt:(NSInteger)dividerIndex
{
    return 100;
}

- (CGFloat)splitView:(NSSplitView *)splitView constrainMaxCoordinate:(CGFloat)proposedMaximumPosition ofSubviewAt:(NSInteger)dividerIndex
{
    return proposedMaximumPosition-50;
}

@end