//
//  EPConfigStorage.m
//  YuMi
//
//  Lightweight persistence for client/init data
//

#import "EPConfigStorage.h"

@implementation EPConfigStorage

#pragma mark - Public

+ (BOOL)saveInit:(NSDictionary *)dict {
    if (![dict isKindOfClass:[NSDictionary class]]) { return NO; }
    NSMutableDictionary *wrapped = [dict mutableCopy];
    wrapped[@"_version"] = @1;
    wrapped[@"_timestamp"] = @((long long)([[NSDate date] timeIntervalSince1970]));
    NSData *data = [NSJSONSerialization dataWithJSONObject:wrapped options:0 error:nil];
    if (!data) { return NO; }
    NSString *path = [self initPath];
    NSError *error = nil;
    NSFileManager *fm = [NSFileManager defaultManager];
    NSString *dir = [path stringByDeletingLastPathComponent];
    if (![fm fileExistsAtPath:dir]) {
        [fm createDirectoryAtPath:dir withIntermediateDirectories:YES attributes:nil error:&error];
        if (error) { return NO; }
    }
    return [data writeToFile:path atomically:YES];
}

+ (NSDictionary * _Nullable)loadInit {
    NSString *path = [self initPath];
    NSData *data = [NSData dataWithContentsOfFile:path];
    if (!data) { return nil; }
    id obj = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
    if (![obj isKindOfClass:[NSDictionary class]]) { return nil; }
    return (NSDictionary *)obj;
}

+ (BOOL)clearInit {
    NSString *path = [self initPath];
    NSFileManager *fm = [NSFileManager defaultManager];
    if (![fm fileExistsAtPath:path]) { return YES; }
    NSError *error = nil;
    [fm removeItemAtPath:path error:&error];
    return (error == nil);
}

#pragma mark - Helpers

+ (NSString *)initPath {
    NSArray<NSURL *> *urls = [[NSFileManager defaultManager] URLsForDirectory:NSApplicationSupportDirectory inDomains:NSUserDomainMask];
    NSURL *dirURL = urls.firstObject;
    if (!dirURL) { dirURL = [NSURL fileURLWithPath:[NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES) firstObject]]; }
    NSURL *fileURL = [dirURL URLByAppendingPathComponent:@"ep_config_init.json"];
    return fileURL.path;
}

@end