////////////////////////////////////////////////////////////////////////////
//
// Copyright 2016 Realm Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////

#import "RLMSyncCredentials.h"
#import "RLMSyncUtil_Private.h"

/// A Twitter account as an identity provider.
//extern RLMIdentityProvider const RLMIdentityProviderTwitter;

RLMIdentityProvider const RLMIdentityProviderDebug                  = @"debug";
RLMIdentityProvider const RLMIdentityProviderRealm                  = @"realm";
RLMIdentityProvider const RLMIdentityProviderUsernamePassword       = @"password";
RLMIdentityProvider const RLMIdentityProviderFacebook               = @"facebook";
RLMIdentityProvider const RLMIdentityProviderTwitter                = @"twitter";
RLMIdentityProvider const RLMIdentityProviderGoogle                 = @"google";
RLMIdentityProvider const RLMIdentityProviderCloudKit               = @"cloudkit";
RLMIdentityProvider const RLMIdentityProviderJWT                    = @"jwt";
RLMIdentityProvider const RLMIdentityProviderAnonymous              = @"anonymous";
RLMIdentityProvider const RLMIdentityProviderNickname               = @"nickname";

@interface RLMSyncCredentials ()

- (instancetype)initWithCustomToken:(RLMSyncCredentialsToken)token
                           provider:(RLMIdentityProvider)provider
                           userInfo:(NSDictionary *)userInfo NS_DESIGNATED_INITIALIZER;

@property (nonatomic, readwrite) RLMSyncCredentialsToken token;
@property (nonatomic, readwrite) RLMIdentityProvider provider;
@property (nonatomic, readwrite) NSDictionary *userInfo;

@end

@implementation RLMSyncCredentials

+ (instancetype)credentialsWithFacebookToken:(RLMSyncCredentialsToken)token {
    return [[self alloc] initWithCustomToken:token provider:RLMIdentityProviderFacebook userInfo:nil];
}

+ (instancetype)credentialsWithGoogleToken:(RLMSyncCredentialsToken)token {
    return [[self alloc] initWithCustomToken:token provider:RLMIdentityProviderGoogle userInfo:nil];
}

+ (instancetype)credentialsWithCloudKitToken:(RLMSyncCredentialsToken)token {
    return [[self alloc] initWithCustomToken:token provider:RLMIdentityProviderCloudKit userInfo:nil];
}

+ (instancetype)credentialsWithUsername:(NSString *)username
                               password:(NSString *)password
                               register:(BOOL)shouldRegister {
    return [[self alloc] initWithCustomToken:username
                                    provider:RLMIdentityProviderUsernamePassword
                                    userInfo:@{kRLMSyncPasswordKey: password,
                                               kRLMSyncRegisterKey: @(shouldRegister)}];
}

+ (instancetype)credentialsWithJWT:(NSString *)token {
    return [[self alloc] initWithCustomToken:token provider:RLMIdentityProviderJWT userInfo:nil];
}
    
+ (instancetype)anonymousCredentials {
    return [[self alloc] initWithCustomToken:@"" provider:RLMIdentityProviderAnonymous userInfo:nil];
}
    
+ (instancetype)credentialsWithNickname:(NSString *)nickname isAdmin:(BOOL)isAdmin {
    return [[self alloc] initWithCustomToken:nickname
                                    provider:RLMIdentityProviderNickname
                                    userInfo:@{kRLMSyncIsAdminKey: @(isAdmin), kRLMSyncDataKey: nickname}];
}

/// Intended only for testing use. Will only work if the ROS is started with the `debug` provider enabled.
+ (instancetype)credentialsWithDebugUserID:(NSString *)userID isAdmin:(BOOL)isAdmin {
    return [[self alloc] initWithCustomToken:userID
                                    provider:RLMIdentityProviderDebug
                                    userInfo:@{kRLMSyncIsAdminKey: @(isAdmin)}];
}

+ (instancetype)credentialsWithAccessToken:(RLMServerToken)accessToken identity:(NSString *)identity {
    return [[self alloc] initWithCustomToken:accessToken
                                    provider:RLMIdentityProviderAccessToken
                                    userInfo:@{kRLMSyncIdentityKey: identity}];
}

- (BOOL)isEqual:(id)object {
    if (![object isKindOfClass:[RLMSyncCredentials class]]) {
        return NO;
    }
    RLMSyncCredentials *that = (RLMSyncCredentials *)object;
    return ([self.token isEqualToString:that.token]
            && [self.provider isEqualToString:that.provider]
            && [self.userInfo isEqual:that.userInfo]);
}

- (instancetype)initWithCustomToken:(RLMSyncCredentialsToken)token
                           provider:(RLMIdentityProvider)provider
                           userInfo:(NSDictionary *)userInfo {
    if (self = [super init]) {
        self.token = token;
        self.provider = provider;
        self.userInfo = userInfo;
        return self;
    }
    return nil;
}

@end