/*

 File: PlayerModel.m

 Abstract: Provide an example of how to successfully submit achievements and store them when network connection is not available

 Version: 1.0

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 */

#import "PlayerModel.h"

@implementation PlayerModel

@synthesize storedFilename, storedAchievements;

- (id)init

{

    self = [super init];

    if (self) {

        writeLock = [[NSLock alloc] init]; 

        NSString* path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

        storedFilename = [[NSString alloc] initWithFormat:@"%@/%@.storedAchievements.plist",[GKLocalPlayer localPlayer].playerID,path];

    }

    return self;

}

- (void)dealloc

{

    [writeLock release];

    [storedFilename release];   

    [storedAchievements release];

    [super dealloc];

}

// Try to submit all stored achievements to update any achievements that were not successful. 

- (void)resubmitStoredAchievements

{

    if (storedAchievements) {

        for (NSString *key in storedAchievements){

            GKAchievement * achievement = [storedAchievements objectForKey:key];

            [storedAchievements removeObjectForKey:key];

            [self submitAchievement:achievement];

        } 

        [self writeStoredAchievements];

    }

}

// Load stored achievements and attempt to submit them

- (void)loadStoredAchievements

{

    if (!storedAchievements) {

        NSDictionary *  unarchivedObj = [NSKeyedUnarchiver unarchiveObjectWithFile:storedFilename];;

        if (unarchivedObj) {

            storedAchievements = [[NSMutableDictionary alloc] initWithDictionary:unarchivedObj];

            [self resubmitStoredAchievements];

        } else {

            storedAchievements = [[NSMutableDictionary alloc] init];

        }

    }    

}

// store achievements to disk to submit at a later time.

- (void)writeStoredAchievements

{

    [writeLock lock];

    NSData * archivedAchievements = [NSKeyedArchiver archivedDataWithRootObject:storedAchievements];

    NSError * error;

    [archivedAchievements writeToFile:storedFilename options:NSDataWritingFileProtectionNone error:&error];

    if (error) {

        //  Error saving file, handle accordingly

    }

    [writeLock unlock];

}

// Submit an achievement to the server and store if submission fails

- (void)submitAchievement:(GKAchievement *)achievement 

{

    if (achievement) {

        // Submit the achievement. 

        [achievement reportAchievementWithCompletionHandler: ^(NSError *error){

            if (error) {

                // Store achievement to be submitted at a later time. 

                [self storeAchievement:achievement];

            } else {

                if ([storedAchievements objectForKey:achievement.identifier]) {

                    // Achievement is reported, remove from store. 

                    [storedAchievements removeObjectForKey:achievement.identifier];

                } 

                [self resubmitStoredAchievements];

            }

        }];

    }

}

// Create an entry for an achievement that hasn't been submitted to the server 

- (void)storeAchievement:(GKAchievement *)achievement 

{

    GKAchievement * currentStorage = [storedAchievements objectForKey:achievement.identifier];

    if (!currentStorage || (currentStorage && currentStorage.percentComplete < achievement.percentComplete)) {

        [storedAchievements setObject:achievement forKey:achievement.identifier];

        [self writeStoredAchievements];

    }

}

// Reset all the achievements for local player 

- (void)resetAchievements

{

    [GKAchievement resetAchievementsWithCompletionHandler: ^(NSError *error) 

     {

        if (!error) {

             [storedAchievements release];

            storedAchievements = [[NSMutableDictionary alloc] init];

            // overwrite any previously stored file

             [self writeStoredAchievements];              

        } else {

            // Error clearing achievements. 

         }

     }];

}

@end