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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using NUnit.Framework;
using ServiceStack.Common;
using ServiceStack.Common;
using ServiceStack.Text;

namespace ServiceStack.Redis.Tests.Examples.BestPractice
{

/// <summary>
/// A complete, self-contained example showing how to create a basic blog application using Redis.
/// </summary>

#region Blog Models

public class User
: IHasBlogRepository
{
public IBlogRepository Repository { private get; set; }

public User()
{
this.BlogIds = new List<long>();
}

public long Id { get; set; }
public string Name { get; set; }
public List<long> BlogIds { get; set; }

public List<Blog> GetBlogs()
{
return this.Repository.GetBlogs(this.BlogIds);
}

public Blog CreateNewBlog(Blog blog)
{
this.Repository.StoreBlogs(this, blog);

return blog;
}
}

public class Blog
: IHasBlogRepository
{
public IBlogRepository Repository { private get; set; }

public Blog()
{
this.Tags = new List<string>();
this.BlogPostIds = new List<long>();
}

public long Id { get; set; }
public long UserId { get; set; }
public string UserName { get; set; }
public List<string> Tags { get; set; }
public List<long> BlogPostIds { get; set; }

public List<BlogPost> GetBlogPosts()
{
return this.Repository.GetBlogPosts(this.BlogPostIds);
}

public void StoreNewBlogPosts(params BlogPost[] blogPosts)
{
this.Repository.StoreNewBlogPosts(this, blogPosts);
}
}

public class BlogPost
{
public BlogPost()
{
this.Categories = new List<string>();
this.Tags = new List<string>();
this.Comments = new List<BlogPostComment>();
}

public long Id { get; set; }
public long BlogId { get; set; }
public string Title { get; set; }
public string Content { get; set; }
public List<string> Categories { get; set; }
public List<string> Tags { get; set; }
public List<BlogPostComment> Comments { get; set; }
}

public class BlogPostComment
{
public string Content { get; set; }
public DateTime CreatedDate { get; set; }
}
#endregion


#region Blog Repository
public interface IHasBlogRepository
{
IBlogRepository Repository { set; }
}

public class BlogRepository
: IBlogRepository
{
const string CategoryTypeName = "Category";
const string TagCloudKey = "urn:TagCloud";
const string AllCategoriesKey = "urn:Categories";
const string RecentBlogPostsKey = "urn:BlogPosts:RecentPosts";
const string RecentBlogPostCommentsKey = "urn:BlogPostComment:RecentComments";

public BlogRepository(IRedisClient client)
{
this.redis = client;
}

private readonly IRedisClient redis;

public void StoreUsers(params User[] users)
{
var redisUsers = redis.As<User>();
            Inject(users);
            users.Where(x => x.Id == default(int))
                .Each(x => x.Id = redisUsers.GetNextSequence());

            redisUsers.StoreAll(users);
        }

public List<User> GetAllUsers()
{
var redisUsers = redis.As<User>();
            return Inject(redisUsers.GetAll());
        }

public void StoreBlogs(User user, params Blog[] blogs)
{
var redisBlogs = redis.As<Blog>();
            foreach (var blog in blogs)
            {
                blog.Id = blog.Id != default(int) ? blog.Id : redisBlogs.GetNextSequence();
                blog.UserId = user.Id;
                blog.UserName = user.Name;

                user.BlogIds.AddIfNotExists(blog.Id);
            }

            using (var trans = redis.CreateTransaction())
            {
                trans.QueueCommand(x => x.Store(user));
                trans.QueueCommand(x => x.StoreAll(blogs));

                trans.Commit();
            }

            Inject(blogs);
        }

public List<Blog> GetBlogs(IEnumerable<long> blogIds)
{
var redisBlogs = redis.As<Blog>();
            return Inject(
                redisBlogs.GetByIds(blogIds.Map(x => x.ToString())));
        }

public List<Blog> GetAllBlogs()
{
var redisBlogs = redis.As<Blog>();
            return Inject(redisBlogs.GetAll());
        }

public List<BlogPost> GetBlogPosts(IEnumerable<long> blogPostIds)
{
var redisBlogPosts = redis.As<BlogPost>();
            return redisBlogPosts.GetByIds(blogPostIds.Map(x => x.ToString())).ToList();
        }

public void StoreNewBlogPosts(Blog blog, params BlogPost[] blogPosts)
{
var redisBlogPosts = redis.As<BlogPost>();
var redisComments = redis.As<BlogPostComment>();

            //Get wrapper around a strongly-typed Redis server-side List
            var recentPosts = redisBlogPosts.Lists[RecentBlogPostsKey];
            var recentComments = redisComments.Lists[RecentBlogPostCommentsKey];

            foreach (var blogPost in blogPosts)
            {
                blogPost.Id = blogPost.Id != default(int) ? blogPost.Id : redisBlogPosts.GetNextSequence();
                blogPost.BlogId = blog.Id;
                blog.BlogPostIds.AddIfNotExists(blogPost.Id);

                //List of Recent Posts and comments
                recentPosts.Prepend(blogPost);
                blogPost.Comments.ForEach(recentComments.Prepend);

                //Tag Cloud
                blogPost.Tags.ForEach(x =>
                    redis.IncrementItemInSortedSet(TagCloudKey, x, 1));

                //List of all post categories
                blogPost.Categories.ForEach(x =>
                      redis.AddItemToSet(AllCategoriesKey, x));

                //Map of Categories to BlogPost Ids
                blogPost.Categories.ForEach(x =>
                      redis.AddItemToSet(UrnId.Create(CategoryTypeName, x), blogPost.Id.ToString()));
            }

            //Rolling list of recent items, only keep the last 5
            recentPosts.Trim(0, 4);
            recentComments.Trim(0, 4);

            using (var trans = redis.CreateTransaction())
            {
                trans.QueueCommand(x => x.Store(blog));
                trans.QueueCommand(x => x.StoreAll(blogPosts));

                trans.Commit();
            }
        }

public List<BlogPost> GetRecentBlogPosts()
{
var redisBlogPosts = redis.As<BlogPost>();
return redisBlogPosts.Lists[RecentBlogPostsKey].GetAll();
}

public List<BlogPostComment> GetRecentBlogPostComments()
{
var redisComments = redis.As<BlogPostComment>();
            return redisComments.Lists[RecentBlogPostCommentsKey].GetAll();
        }

public IDictionary<string, double> GetTopTags(int take)
{
return redis.GetRangeWithScoresFromSortedSetDesc(TagCloudKey, 0, take - 1);
}

public HashSet<string> GetAllCategories()
{
return redis.GetAllItemsFromSet(AllCategoriesKey);
}

public void StoreBlogPost(BlogPost blogPost)
{
redis.Store(blogPost);
}

public BlogPost GetBlogPost(int postId)
{
return redis.GetById<BlogPost>(postId);
}

public List<BlogPost> GetBlogPostsByCategory(string categoryName)
{
var categoryUrn = UrnId.Create(CategoryTypeName, categoryName);
var documentDbPostIds = redis.GetAllItemsFromSet(categoryUrn);

return redis.GetByIds<BlogPost>(documentDbPostIds.ToArray()).ToList();
}

public List<T> Inject<T>(IEnumerable<T> entities)
where T : IHasBlogRepository
{
var entitiesList = entities.ToList();
entitiesList.ForEach(x => x.Repository = this);
return entitiesList;
}

}
#endregion


[TestFixture, Explicit, Category("Integration")]
public class BlogPostBestPractice
{
readonly RedisClient redisClient = new RedisClient(TestConfig.SingleHost);
private IBlogRepository repository;

[SetUp]
public void OnBeforeEachTest()
{
redisClient.FlushAll();
repository = new BlogRepository(redisClient);

InsertTestData(repository);
}

public static void InsertTestData(IBlogRepository repository)
{
var ayende = new User { Name = "ayende" };
var mythz = new User { Name = "mythz" };

repository.StoreUsers(ayende, mythz);

var ayendeBlog = ayende.CreateNewBlog(new Blog { Tags = { "Architecture", ".NET", "Databases" } });

var mythzBlog = mythz.CreateNewBlog(new Blog { Tags = { "Architecture", ".NET", "Databases" }});

ayendeBlog.StoreNewBlogPosts(new BlogPost
{
Title = "RavenDB",
Categories = new List<string> { "NoSQL", "DocumentDB" },
Tags = new List<string> { "Raven", "NoSQL", "JSON", ".NET" },
Comments = new List<BlogPostComment>
{
new BlogPostComment { Content = "First Comment!", CreatedDate = DateTime.UtcNow,},
new BlogPostComment { Content = "Second Comment!", CreatedDate = DateTime.UtcNow,},
}
},
new BlogPost
{
BlogId = ayendeBlog.Id,
Title = "Cassandra",
Categories = new List<string> { "NoSQL", "Cluster" },
Tags = new List<string> { "Cassandra", "NoSQL", "Scalability", "Hashing" },
Comments = new List<BlogPostComment>
{
new BlogPostComment { Content = "First Comment!", CreatedDate = DateTime.UtcNow,}
}
});

mythzBlog.StoreNewBlogPosts(
new BlogPost
{
Title = "Redis",
Categories = new List<string> { "NoSQL", "Cache" },
Tags = new List<string> { "Redis", "NoSQL", "Scalability", "Performance" },
Comments = new List<BlogPostComment>
{
new BlogPostComment { Content = "First Comment!", CreatedDate = DateTime.UtcNow,}
}
},
new BlogPost
{
Title = "Couch Db",
Categories = new List<string> { "NoSQL", "DocumentDB" },
Tags = new List<string> { "CouchDb", "NoSQL", "JSON" },
Comments = new List<BlogPostComment>
{
new BlogPostComment {Content = "First Comment!", CreatedDate = DateTime.UtcNow,}
}
});
}

[Test]
public void View_test_data()
{
var mythz = repository.GetAllUsers().First(x => x.Name == "mythz");
var mythzBlogPostIds = mythz.GetBlogs().SelectMany(x => x.BlogPostIds);
var mythzBlogPosts = repository.GetBlogPosts(mythzBlogPostIds);

Debug.WriteLine(mythzBlogPosts.Dump());
/* Output:
[
{
Id: 3,
BlogId: 2,
Title: Redis,
Categories:
[
NoSQL,
Cache
],
Tags:
[
Redis,
NoSQL,
Scalability,
Performance
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:24:47.516949Z
}
]
},
{
Id: 4,
BlogId: 2,
Title: Couch Db,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
CouchDb,
NoSQL,
JSON
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:24:47.516949Z
}
]
}
]
*/
}

[Test]
public void Show_a_list_of_blogs()
{
var blogs = repository.GetAllBlogs();
Debug.WriteLine(blogs.Dump());
/* Output:
[
{
Id: 1,
UserId: 1,
UserName: ayende,
Tags:
[
Architecture,
.NET,
Databases
],
BlogPostIds:
[
1,
2
]
},
{
Id: 2,
UserId: 2,
UserName: mythz,
Tags:
[
Architecture,
.NET,
Databases
],
BlogPostIds:
[
3,
4
]
}
]
*/
}

[Test]
public void Show_a_list_of_recent_posts_and_comments()
{
//Recent posts are already maintained in the repository
var recentPosts = repository.GetRecentBlogPosts();
var recentComments = repository.GetRecentBlogPostComments();

Debug.WriteLine("Recent Posts:\n" + recentPosts.Dump());
Debug.WriteLine("Recent Comments:\n" + recentComments.Dump());
/*
Recent Posts:
[
{
Id: 4,
BlogId: 2,
Title: Couch Db,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
CouchDb,
NoSQL,
JSON
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7419361Z
}
]
},
{
Id: 3,
BlogId: 2,
Title: Redis,
Categories:
[
NoSQL,
Cache
],
Tags:
[
Redis,
NoSQL,
Scalability,
Performance
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7419361Z
}
]
},
{
Id: 2,
BlogId: 1,
Title: Cassandra,
Categories:
[
NoSQL,
Cluster
],
Tags:
[
Cassandra,
NoSQL,
Scalability,
Hashing
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7039339Z
}
]
},
{
Id: 1,
BlogId: 1,
Title: RavenDB,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
Raven,
NoSQL,
JSON,
.NET
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7039339Z
},
{
Content: Second Comment!,
CreatedDate: 2010-04-26T02:25:39.7039339Z
}
]
}
]

Recent Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7419361Z
},
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7419361Z
},
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7039339Z
},
{
Content: Second Comment!,
CreatedDate: 2010-04-26T02:25:39.7039339Z
},
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:25:39.7039339Z
}
]
*/
}

[Test]
public void Show_a_TagCloud()
{
//Tags are maintained in the repository
var tagCloud = repository.GetTopTags(5);
Debug.WriteLine(tagCloud.Dump());
/* Output:
[
[
NoSQL,
4
],
[
Scalability,
2
],
[
JSON,
2
],
[
Redis,
1
],
[
Raven,
1
]
]
*/
}

[Test]
public void Show_all_Categories()
{
//Categories are maintained in the repository
var allCategories = repository.GetAllCategories();
Debug.WriteLine(allCategories.Dump());
/* Output:
[
DocumentDB,
NoSQL,
Cluster,
Cache
]
*/
}

[Test]
public void Show_post_and_all_comments()
{
var postId = 1;
var blogPost = repository.GetBlogPost(postId);
Debug.WriteLine(blogPost.Dump());
/* Output:
{
Id: 1,
BlogId: 1,
Title: RavenDB,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
Raven,
NoSQL,
JSON,
.NET
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:00:24.5982749Z
},
{
Content: Second Comment!,
CreatedDate: 2010-04-26T02:00:24.5982749Z
}
]
}
*/
}

[Test]
public void Add_comment_to_existing_post()
{
var postId = 1;
var blogPost = repository.GetBlogPost(postId);

blogPost.Comments.Add(
new BlogPostComment { Content = "Third Comment!", CreatedDate = DateTime.UtcNow });

repository.StoreBlogPost(blogPost);

var refreshBlogPost = repository.GetBlogPost(postId);
Debug.WriteLine(refreshBlogPost.Dump());
/* Output:
{
Id: 1,
BlogId: 1,
Title: RavenDB,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
Raven,
NoSQL,
JSON,
.NET
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:08:13.5580978Z
},
{
Content: Second Comment!,
CreatedDate: 2010-04-26T02:08:13.5580978Z
},
{
Content: Third Comment!,
CreatedDate: 2010-04-26T02:08:13.6871052Z
}
]
}
*/
}

[Test]
public void Show_all_Posts_for_a_Category()
{
var documentDbPosts = repository.GetBlogPostsByCategory("DocumentDB");
Debug.WriteLine(documentDbPosts.Dump());
/* Output:
[
{
Id: 4,
BlogId: 2,
Title: Couch Db,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
CouchDb,
NoSQL,
JSON
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:16:08.0332362Z
}
]
},
{
Id: 1,
BlogId: 1,
Title: RavenDB,
Categories:
[
NoSQL,
DocumentDB
],
Tags:
[
Raven,
NoSQL,
JSON,
.NET
],
Comments:
[
{
Content: First Comment!,
CreatedDate: 2010-04-26T02:16:07.9662324Z
},
{
Content: Second Comment!,
CreatedDate: 2010-04-26T02:16:07.9662324Z
}
]
}
]
*/
}

}
}
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