//
//  PBGitConfig.m
//  GitX
//
//  Created by Pieter de Bie on 14-10-08.
//  Copyright 2008 Pieter de Bie. All rights reserved.
//

#import "PBGitConfig.h"


@implementation PBGitConfig

- init
{
	repositoryPath = nil;
	return self;
}

- initWithRepositoryPath:(NSString *)path
{
	repositoryPath = path;
	return self;
}

- (void) writeValue:(NSString *)value forKey:(NSString *)key global:(BOOL)global
{
	[self willChangeValueForKey:[key substringToIndex:[key rangeOfString:@"."].location]];

	NSMutableArray *array = [NSMutableArray arrayWithObject:@"config"];
	if (global)
		[array addObject:@"--global"];
	else {
		[array addObject:@"-f"];
		[array addObject:[repositoryPath stringByAppendingPathComponent:@"config"]];
	}

	[array addObject:key];
	[array addObject:value];

	int ret;
	[PBEasyPipe outputForCommand:[PBGitBinary path]	withArgs:array inDir:nil retValue:&ret];
	if (ret)
		DLog(@"Writing to config file failed!");
	[self didChangeValueForKey:[key substringToIndex:[key rangeOfString:@"."].location]];
}

- valueForKeyPath:(NSString *)path
{
	NSMutableArray *arguments = [NSMutableArray array];
	if (repositoryPath)
		[arguments addObject:[NSString stringWithFormat:@"--git-dir=%@", repositoryPath]];

	[arguments addObject:@"config"];
	[arguments addObject:@"--get"];
	[arguments addObject:path];

	int ret;
	NSString *value = [PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:nil retValue:&ret];

	if (ret)
		return nil;

	return value;
}

- (void) setValue:(id)value forKeyPath:(NSString *)path
{
	// Check if the config option is local. In that case,
	// write it local
	if (repositoryPath) {
		NSMutableArray *arguments = [NSMutableArray arrayWithObjects:@"config", @"-f", [repositoryPath stringByAppendingPathComponent:@"config"], @"--get", path, nil];
		int ret;
		[PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:nil retValue:&ret];

		if (!ret) // it's local
			return [self writeValue:value forKey:path global:NO];
	}

	// Check if it exists globally. In that case, write it as a global

	NSArray *arguments = [NSArray arrayWithObjects:@"config", @"--global", @"--get", path, nil];
	int ret;
	[PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:nil retValue:&ret];
	if (!ret) // It exists globally
		return [self writeValue:value forKey:path global:YES];

	// It doesn't exist at all. Write it locally.
	[self writeValue:value forKey:path global:NO];
}

/**
 runs `git config -l` returning a dict of key-value pairs from the result
 
 passing nil as directory passes '--global' flag
 */
- (NSDictionary*) listConfigValuesInDir:(NSString*)inDir
{
    NSArray* arguments;
    
    if (inDir == nil) {
        arguments = [NSArray arrayWithObjects:@"config", @"--global", @"-l", @"-z", nil];
    } else {
        arguments = [NSArray arrayWithObjects:@"config", @"-l", @"-z", nil];
    }
    
	int ret = 1;
	NSString* output = [PBEasyPipe outputForCommand:[PBGitBinary path] withArgs:arguments inDir:inDir retValue:&ret];
    NSMutableDictionary *result = [NSMutableDictionary dictionary];
    if (ret==0) {
        NSArray *lines = [output componentsSeparatedByString:@"\0"];

        for (NSString* line in lines) {
			if([line length] == 0) continue;
            NSRange equalsPos = [line rangeOfString:@"\n"];
            NSString* key = [line substringToIndex:equalsPos.location];
            NSString* value = [line substringFromIndex:equalsPos.location+1];
            [result setObject:value forKey:key];
        }
    }
    
    return [NSDictionary dictionaryWithDictionary:result];
}

@end