//
//  FKDownloadStore.m
//  FirstLink
//
//  Created by ascii on 16/1/8.
//  Copyright © 2016年 FirstLink. All rights reserved.
//

#import "FKDownloadStore.h"
#import "NSString+MD5.h"
#include <CommonCrypto/CommonDigest.h>

NSString *const REACTNATIVE_DIRECTORY_NAME = @"reactnative";

@implementation FKDownloadStore

+ (NSString *)directoryPath:(NSString *)dirName {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSString *path = [paths objectAtIndex:0];
    return [path stringByAppendingPathComponent:dirName];
}

+ (NSString*)firstFilePathInDirectoryPath:(NSString *)dirPath {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:dirPath]) {
        NSString *fileName = [FKDownloadStore filesAtDirectory:dirPath].firstObject;
        if (fileName) {
            return [[FKDownloadStore directoryPath:REACTNATIVE_DIRECTORY_NAME] stringByAppendingPathComponent:fileName];
        }
    }
    
    return nil;
}

+ (BOOL)removeFilesInDirectoryPath:(NSString *)dirPath {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *filePaths = [FKDownloadStore filesAtDirectory:dirPath];
    for (NSString *filePath in filePaths) {
        [fileManager removeItemAtPath:[dirPath stringByAppendingPathComponent:filePath]
                                error:nil];
    }
    return YES;
}

+ (BOOL)removeFileAtPath:(NSString *)filePath {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    [fileManager removeItemAtPath:filePath
                            error:nil];
    return YES;
}

+ (BOOL)renameFileAtPath:(NSString *)oldPath toPath:(NSString *)toPath {
    NSError *error;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    return [fileManager moveItemAtPath:oldPath toPath:toPath error:&error];
}

+ (BOOL)makeDirectory:(NSString *)dirName {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *dirPath = [FKDownloadStore directoryPath:dirName];
    if (![fileManager fileExistsAtPath:dirPath]) {
        return [fileManager createDirectoryAtPath:dirPath
                      withIntermediateDirectories:NO
                                       attributes:nil
                                            error:nil];
    }
    return YES;
}

+ (NSString *)md5OfFileAtPath:(NSString *)filePath {
    if (filePath) {
        NSError *error;
        NSString *localContent = [[NSString alloc] initWithContentsOfFile:filePath
                                                                 encoding:NSUTF8StringEncoding
                                                                    error:&error];
        if (!error) {
            return localContent.MD5;
        }
    }
    return nil;
}

#pragma mark - Private

+ (NSArray *)filesAtDirectory:(NSString *)dirPath {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:dirPath]) {
        NSError *error;
        NSArray *files = [fileManager contentsOfDirectoryAtPath:dirPath
                                                          error:&error];
        if (!error) {
            return files;
        }
    }
    return nil;
}

@end