//
//  EQNUtility.m
//  Earthquake Network
//
//  Created by Luca Beretta on 02/11/18.
//  Copyright © 2018 Luca Beretta. All rights reserved.
//

#import "EQNUtility.h"
#import "EQNSegnalazione.h"
#import "EQNPastquakes.h"
#import "EQNSisma.h"
#if NOTIFICATION_CONTENT
#import "EQNNotificationContent-Swift.h"
#endif

@implementation EQNUtility

+ (NSDate *)getDateFromString:(NSString *)dateString
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.timeZone = [NSTimeZone timeZoneWithName:@"Europe/Rome"];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    return [formatter dateFromString:dateString];
}

+ (NSString *)formattedStringForTimeDifference:(NSInteger)timeDifference
{
    NSString *format = @"";
    NSInteger finalValue = timeDifference;
    
    // check for minutes, hours or days
    if (timeDifference < 60) {
        format = NSLocalizedString(@"manual_minutes_ago", nil);
    } else if (timeDifference < 1440) {
        finalValue = timeDifference / 60.0;
        format = NSLocalizedString(@"manual_hours_ago", nil);
    } else {
        finalValue = timeDifference / 1440.0;
        format = NSLocalizedString(@"manual_days_ago", nil);
    }
    
    return [NSString localizedStringWithFormat:format, finalValue];
}

+ (NSString *)clearStringMessaggi:(NSString *)messaggio
{
    NSString *clearString = [messaggio stringByReplacingOccurrencesOfString:@" " withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@"[" withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@"]" withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@"\"" withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@"<" withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@">" withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@"/" withString:@""];
    clearString = [clearString stringByReplacingOccurrencesOfString:@"span" withString:@""];
    return clearString;
}

#pragma mark - Store/load data

+ (void)storeArray:(NSArray *)array toUserDefaultForKey:(NSString *)keyName
{
    [self storeRootObject:array toUserDefaultForKey:keyName];
}

+ (void)storeRootObject:(id)rootObject toUserDefaultForKey:(NSString *)keyName
{
    NSError *error;
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:rootObject requiringSecureCoding:NO error:nil];
    if (error) {
        NSLog(@"[EQNUtility] Error when storing object for key '%@' (error: %@)", keyName, error.localizedDescription);
        return;
    }
    
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:data forKey:keyName];
}

+ (NSArray *)loadArrayOfClass:(Class)class fromUserDefaultsForKey:(NSString *)keyName
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSData *data = [defaults objectForKey:keyName];
    if (!data) {
        NSLog(@"[EQNUtility] No array saved for key '%@'", keyName);
        return nil;
    }
    
    NSError *error;
    NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingFromData:data error:&error];
    unarchiver.requiresSecureCoding = NO;
    NSArray *array = [unarchiver decodeObjectOfClass:class forKey:NSKeyedArchiveRootObjectKey];
    
    if (error) {
        NSLog(@"[EQNUtility] Unable to unarchive object for key '%@' (error: %@)", keyName, error.localizedDescription);
        return nil;
    }
    return array;
}

#pragma mark - Notifications

+ (nullable NSDate *)calculateUserSeismicTimestampFromUserInfo:(NSDictionary *)info
{
    // dobbiamo calcolare l'ora in cui il sisma arriverà nella posizione dell'utente
    // per fare questo, il calcolo sarà:
    // timestamp sisma + warning time
    
    // ultima posizione nota dell'utente
    CLLocationManager *manager = [[CLLocationManager alloc] init];
    CLLocation *lastUserLocation = manager.location;
    if (lastUserLocation == nil) {
        lastUserLocation = EQNUserData.sharedData.lastLocation;
    }
    if (!lastUserLocation) {
        return nil;
    }
    
    // posizione sisma
    double latitude = [info[@"latitude"] doubleValue];
    double longitude = [info[@"longitude"] doubleValue];
    CLLocation *location = [[CLLocation alloc] initWithLatitude:latitude longitude:longitude];
    
    // distanza tra sisma e utente (in km)
    CLLocationDistance distance = [lastUserLocation distanceFromLocation:location];
    double userDistance = distance/1000;
    
    // calcoliamo warning_time
    double waveSpeed = [info[@"wave_speed"] doubleValue];
    double warningTime = round(userDistance/waveSpeed - 5);
    
    // aggiungiamo il warning time al timestamp del sisma
    NSDate *seismicDate = [EQNUtility getDateFromString:info[@"datetime"]];
    NSDate *userSeismicDate = [seismicDate dateByAddingTimeInterval:warningTime];
    
    return userSeismicDate;
}

@end