/*

 * Hedgewars-iOS, a Hedgewars port for iOS devices

 * Copyright (c) 2015-2016 Anton Malmygin <antonc27@mail.ru>

 *

 * 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; version 2 of the License

 *

 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.

 */

#import "IniParser.h"

#define COMMENTS_START_CHAR ';'

#define  SECTION_START_CHAR '['

@interface IniParser ()

@property (nonatomic, strong) NSString *iniFilePath;

@property (nonatomic, strong) NSMutableArray *mutableSections;

@property (nonatomic, strong) NSMutableDictionary *currentSection;

@end

@implementation IniParser

#pragma mark - Initilisation

- (instancetype)initWithIniFilePath:(NSString *)iniFilePath {

    self = [super init];

    if (self) {

        _iniFilePath = [iniFilePath copy];

    }

    return self;

}

#pragma mark - Parse sections

- (NSArray *)newParsedSections {

    NSString *iniFileContents = [NSString stringWithContentsOfFile:self.iniFilePath encoding:NSUTF8StringEncoding error:nil];

    [self prepareForParsing];

    [iniFileContents enumerateLinesUsingBlock:^(NSString *line, BOOL *stop) {

        if (![self isNeedToSkipLine:line]) {

            [self parseLine:line];

        }

    }];

    [self addLastParsedSectionToSections];

    return [self copyParsedSections];

}

- (void)prepareForParsing {

    self.mutableSections = [[NSMutableArray alloc] init];

    self.currentSection = nil;

}

- (BOOL)isNeedToSkipLine:(NSString *)line {

    return ([line length] < 1 || [self isLineAComment:line]);

}

- (BOOL)isLineAComment:(NSString *)line {

    return ([line characterAtIndex:0] == COMMENTS_START_CHAR);

}

- (void)parseLine:(NSString *)line {

    if ([self isLineASectionStart:line]) {

        [self addPreviousSectionToSectionsIfNecessary];

        [self createCurrentSection];

    } else {

        [self parseAssignmentForCurrentSectionInLine:line];

    }

}

- (BOOL)isLineASectionStart:(NSString *)line {

    return ([line characterAtIndex:0] == SECTION_START_CHAR);

}

- (void)addPreviousSectionToSectionsIfNecessary {

    if (self.currentSection != nil) {

        [self.mutableSections addObject:self.currentSection];

    }

}

- (void)createCurrentSection {

    self.currentSection = [[NSMutableDictionary alloc] init];

}

- (void)parseAssignmentForCurrentSectionInLine:(NSString *)line {

    NSArray *components = [line componentsSeparatedByString:@"="];

    if (components.count > 1) {

        NSString *key = components[0];

        NSString *value = components[1];

        [self.currentSection setObject:value forKey:key];

    }

}

- (void)addLastParsedSectionToSections {

    [self addPreviousSectionToSectionsIfNecessary];

}

- (NSArray *)copyParsedSections {

    return [self.mutableSections copy];

}

@end