//
//  RNFSManager.m
//  RNFSManager
//
//  Created by Johannes Lumpe on 08/05/15.
//  Copyright (c) 2015 Johannes Lumpe. All rights reserved.
//

#import "RNFSManager.h"
#import "RCTConvert.h"
#import "RCTBridge.h"
#import "NSArray+Map.h"

@implementation RNFSManager

static int MainBundleDirectory = 999;

@synthesize bridge = _bridge;
RCT_EXPORT_MODULE();


RCT_EXPORT_METHOD(readDir:(NSString*)directory inFolder:(NSNumber*)folder callback:(RCTResponseSenderBlock)callback){
  NSString *path;
  int folderInt = [folder integerValue];

  if (folderInt == MainBundleDirectory) {
    path = [[NSBundle mainBundle] bundlePath];
  } else {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(folderInt, NSUserDomainMask, YES);
    path = [paths objectAtIndex:0];
  }

  NSFileManager *fileManager = [NSFileManager defaultManager];
  NSError *error;
  NSString * dirPath = [path stringByAppendingPathComponent:directory];
  NSArray *contents = [fileManager contentsOfDirectoryAtPath:dirPath error:&error];

  contents = [contents mapObjectsUsingBlock:^id(id obj, NSUInteger idx) {
    return @{
      @"name": (NSString*)obj,
      @"path": [dirPath stringByAppendingPathComponent:(NSString*)obj]
    };
  }];

  if (error) {
    return callback([self makeErrorPayload:error]);
  }

  callback(@[[NSNull null], contents]);
}

RCT_EXPORT_METHOD(stat:(NSString*)filepath callback:(RCTResponseSenderBlock)callback){
  NSError *error;
  NSDictionary *attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:filepath error:&error];

  if (error) {
    return callback([self makeErrorPayload:error]);
  }

  attributes = @{
    @"ctime": [self dateToTimeIntervalNumber:(NSDate*)[attributes objectForKey:NSFileCreationDate]],
    @"mtime": [self dateToTimeIntervalNumber:(NSDate*)[attributes objectForKey:NSFileModificationDate]],
    @"size": [attributes objectForKey:NSFileSize],
    @"type": [attributes objectForKey:NSFileType],
    @"mode": [NSNumber numberWithInteger:[[NSString stringWithFormat:@"%o", [(NSNumber*)[attributes objectForKey:NSFilePosixPermissions] integerValue]] integerValue]]
  };

  callback(@[[NSNull null], attributes]);
}

RCT_EXPORT_METHOD(writeFile:(NSString*)filepath contents:(NSString*)base64Content attributes:(NSDictionary*)attributes callback:(RCTResponseSenderBlock)callback){
  NSData *data = [[NSData alloc] initWithBase64EncodedString:base64Content options:NSDataBase64DecodingIgnoreUnknownCharacters];
  BOOL success = [[NSFileManager defaultManager] createFileAtPath:filepath contents:data attributes:attributes];

  if (!success) {
    return callback(@[[NSString stringWithFormat:@"Could not write file at path %@", filepath]]);
  }

  callback(@[[NSNull null], [NSNumber numberWithBool:success]]);
}

RCT_EXPORT_METHOD(unlink:(NSString*)filepath callback:(RCTResponseSenderBlock)callback) {
  NSFileManager *manager = [NSFileManager defaultManager];
  BOOL exists = [manager fileExistsAtPath:filepath isDirectory:false];

  if (!exists) {
    return callback(@[[NSString stringWithFormat:@"File at path %@ does not exist", filepath]]);
  }
  NSError *error;
  BOOL success = [manager removeItemAtPath:filepath error:&error];

  if (!success) {
    return callback([self makeErrorPayload:error]);
  }

  callback(@[[NSNull null], [NSNumber numberWithBool:success], filepath]);
}

RCT_EXPORT_METHOD(readFile:(NSString*)filepath callback:(RCTResponseSenderBlock)callback){
  NSData *content = [[NSFileManager defaultManager] contentsAtPath:filepath];
  NSString *base64Content = [content base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];

  if (!base64Content) {
    return callback(@[[NSString stringWithFormat:@"Could not read file at path %@", filepath]]);
  }

  callback(@[[NSNull null], base64Content]);
}

- (NSNumber*) dateToTimeIntervalNumber:(NSDate*)date {
  return [NSNumber numberWithDouble:[date timeIntervalSince1970]];
}

- (NSArray*) makeErrorPayload:(NSError*)error {
  return @[@{
    @"description": error.localizedDescription,
    @"code": [NSNumber numberWithInteger:error.code]
  }];
}

- (NSString*) getPathForDirectory:(int)directory {
  NSArray *paths = NSSearchPathForDirectoriesInDomains(directory, NSUserDomainMask, YES);
  return [paths objectAtIndex:0];
}

- (NSDictionary *)constantsToExport
{
  return @{
    @"NSCachesDirectoryPath": [self getPathForDirectory:NSCachesDirectory],
    @"NSDocumentDirectoryPath": [self getPathForDirectory:NSDocumentDirectory],
    @"NSCachesDirectory": [NSNumber numberWithInteger:NSCachesDirectory],
    @"NSDocumentDirectory": [NSNumber numberWithInteger:NSDocumentDirectory],
    @"MainBundleDirectory": [NSNumber numberWithInteger:MainBundleDirectory],
    @"NSFileTypeRegular": NSFileTypeRegular,
    @"NSFileTypeDirectory": NSFileTypeDirectory
  };
}

@end