//
//  FLEXRealmDatabaseManager.m
//  FLEX
//
//  Created by Tim Oliver on 28/01/2016.
//  Copyright © 2016 Realm. All rights reserved.
//

#import "FLEXRealmDatabaseManager.h"

#if __has_include(<Realm/Realm.h>)
#import <Realm/Realm.h>
#import <Realm/RLMRealm_Dynamic.h>
#else
#import "FLEXRealmDefines.h"
#endif

@interface FLEXRealmDatabaseManager ()

@property (nonatomic, copy) NSString *path;
@property (nonatomic) RLMRealm * realm;

@end

//#endif

@implementation FLEXRealmDatabaseManager

- (instancetype)initWithPath:(NSString*)aPath
{
    Class realmClass = NSClassFromString(@"RLMRealm");
    if (realmClass == nil) {
        return nil;
    }
    
    self = [super init];
    
    if (self) {
        _path = aPath;
    }
    return self;
}

- (BOOL)open
{
    Class realmClass = NSClassFromString(@"RLMRealm");
    Class configurationClass = NSClassFromString(@"RLMRealmConfiguration");
    
    if (realmClass == nil || configurationClass == nil) {
        return NO;
    }
    
    NSError *error = nil;
    id configuration = [configurationClass new];
    [(RLMRealmConfiguration *)configuration setFileURL:[NSURL fileURLWithPath:self.path]];
    self.realm = [realmClass realmWithConfiguration:configuration error:&error];
    return (error == nil);
}

- (NSArray<NSDictionary<NSString *, id> *> *)queryAllTables
{
    NSMutableArray<NSDictionary<NSString *, id> *> *allTables = [NSMutableArray array];
    RLMSchema *schema = [self.realm schema];
    
    for (RLMObjectSchema *objectSchema in schema.objectSchema) {
        if (objectSchema.className == nil) {
            continue;
        }
        
        NSDictionary<NSString *, id> *dictionary = @{@"name":objectSchema.className};
        [allTables addObject:dictionary];
    }
    
    return allTables;
}

- (NSArray<NSString *> *)queryAllColumnsWithTableName:(NSString *)tableName
{
    RLMObjectSchema *objectSchema = [[self.realm schema] schemaForClassName:tableName];
    if (objectSchema == nil) {
        return nil;
    }
    
    NSMutableArray<NSString *> *columnNames = [NSMutableArray array];
    for (RLMProperty *property in objectSchema.properties) {
        [columnNames addObject:property.name];
    }
    
    return columnNames;
}

- (NSArray<NSDictionary<NSString *, id> *> *)queryAllDataWithTableName:(NSString *)tableName
{
    RLMObjectSchema *objectSchema = [[self.realm schema] schemaForClassName:tableName];
    RLMResults *results = [self.realm allObjects:tableName];
    if (results.count == 0 || objectSchema == nil) {
        return nil;
    }
    
    NSMutableArray<NSDictionary<NSString *, id> *> *allDataEntries = [NSMutableArray array];
    for (RLMObject *result in results) {
        NSMutableDictionary<NSString *, id> *entry = [NSMutableDictionary dictionary];
        for (RLMProperty *property in objectSchema.properties) {
            id value = [result valueForKey:property.name];
            entry[property.name] = (value) ? (value) : [NSNull null];
        }
        
        [allDataEntries addObject:entry];
    }
    
    return allDataEntries;
}

@end