//
//  VKSocialLoginViewController.m
//  Vkino
//
//  Created by Nikita Rodin on 4/29/13.
//  Copyright (c) 2013 Artezio. All rights reserved.
//

#import "VKSocialLoginViewController.h"
#import "VKConnectionManager.h"
#import "Constants.h"
#import "VKBarButtonItem.h"

@interface VKSocialLoginViewController ()

@end

@implementation VKSocialLoginViewController

#if USE_TEST_SERVER
#define kSocialLoginURLPattern @"http://mobile.dev.kinohod.ru/auth/login/%@/?retpath=%@"
#define kSocialLoginCloseURL @"http://mobile.dev.kinohod.ru/auth/closeurl"
#else
#define kSocialLoginURLPattern @"http://kinohod.ru/auth/login/%@/?retpath=%@"
#define kSocialLoginCloseURL @"http://kinohod.ru/auth/closeurl"
#endif //USE_TEST_SERVER

#define kSocialFacebookURL @"https://graph.facebook.com/oauth/authorize"
#define kSocialVkontaktURL @"http://api.vkontakte.ru/oauth/authorize"
#define kSocialOdkURL @"http://www.odnoklassniki.ru/oauth/authorize"

#define kUserIDHeaderKey @"X-User_ID"

#ifdef DEBUG
#define kBulletStormerSexyID @"U2FsdGVkX18Um8MZt3p3cTDK7dQ35Ol-qi2gFpkKvWY"
#endif

- (void)refresh
{
    NSAssert(_networkAlias, @"%s.%d: cannot proceed w/o network alias", __FILE__, __LINE__);
#define FACK_U_KINOHOD_WAI_U_NO_WORK 0
#if FACK_U_KINOHOD_WAI_U_NO_WORK && DEBUG
    NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@?%@=%@", kSocialLoginCloseURL, kUserIDHeaderKey, kBulletStormerSexyID]] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:kDefaultTimeoutInterval];
#else
    NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:[NSString stringWithFormat:kSocialLoginURLPattern, _networkAlias, kSocialLoginCloseURL]] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:kDefaultTimeoutInterval];

    NSHTTPCookieStorage* cookiezJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    NSArray* cookiez = nil;
#if USE_TEST_SERVER
    NSString* base64Credentials = [[[NSString stringWithFormat:@"%@:%@", kUsername, kPassword] dataUsingEncoding:NSASCIIStringEncoding] base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
    [request addValue:[NSString stringWithFormat:@"Basic %@", base64Credentials] forHTTPHeaderField:@"Authorization"];
#endif //USE_TEST_SERVER

    NSArray* urls = @[ request.URL, [NSURL URLWithString:kSocialFacebookURL], [NSURL URLWithString:kSocialVkontaktURL], [NSURL URLWithString:kSocialOdkURL] ];
    for (NSURL* url in urls) {
        cookiez = [cookiezJar cookiesForURL:url];
        for (NSHTTPCookie* cookie in cookiez)
            [cookiezJar deleteCookie:cookie];
    }

#endif //FACK_U_KINOHOD_WAI_U_NO_WORK && DEBUG

    [_webView loadRequest:request];
}

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
{
#if __SHOW_HEADERS
    VKLog(@"social login proceeding to url %@\nwith headers: %@\n cookiez: %@", request.URL.absoluteString, request.allHTTPHeaderFields, [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:request.URL]);
#else
    VKLog(@"social login proceeding to url %@", request.URL.absoluteString);
#endif
    if ([request.URL.absoluteString hasPrefix:kSocialLoginCloseURL]) {
        NSRange rangeOfParam = [request.URL.absoluteString rangeOfString:@"?"];
        NSString* paramString = rangeOfParam.location != NSNotFound ? [request.URL.absoluteString substringFromIndex:rangeOfParam.location + 1] : nil;
        NSRange rangeOfTokenKey = [paramString rangeOfString:kUserIDHeaderKey];
        NSString* token = nil;
        if (rangeOfTokenKey.location != NSNotFound) {
            NSRange rangeOfToken = [paramString rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"&#"] options:0 range:NSMakeRange(rangeOfTokenKey.location, paramString.length)];
            if (rangeOfToken.location != NSNotFound)
                rangeOfToken.length = rangeOfToken.location;
            else
                rangeOfToken.length = paramString.length - rangeOfTokenKey.location - 1 - kUserIDHeaderKey.length; // +1 for '=' sign
            rangeOfToken.location = rangeOfTokenKey.location + kUserIDHeaderKey.length + 1;
            token = [paramString substringWithRange:rangeOfToken];
        }

        if (token.length)
            [_delegate socialLogin:self didSucceedWithToken:token];
        else if ([_delegate respondsToSelector:@selector(socialLoginDidFail:)])
            [_delegate socialLoginDidFail:self];
        [self dismissViewControllerAnimated:YES completion:NULL];
        return NO;
    }

#if USE_TEST_SERVER
    if (![super webView:webView shouldStartLoadWithRequest:request navigationType:navigationType]) {
        return NO;
    }
#endif //USE_TEST_SERVER

    return YES;
}

- (void)viewDidLoad
{
    self.screenName = @"social login";
    [super viewDidLoad];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"CANCEL", ) style:UIBarButtonItemStylePlain target:self action:@selector(cancelClicked)];
}

- (void)cancelClicked
{
    [self dismissViewControllerAnimated:YES completion:Nil];
}

@end