using System.Threading;

using System.Threading.Tasks;

using System.Web.Http;

using JSONAPI.Documents;

namespace JSONAPI.Http

{

/// <summary>

/// This ApiController is capable of serving all requests using JSON API.

/// </summary>

public class JsonApiController : ApiController

{

private readonly IDocumentMaterializerLocator _documentMaterializerLocator;

/// <summary>

/// Creates a new JsonApiController

/// </summary>

/// <param name="documentMaterializerLocator">The service locator to get document materializers for a given resource type.</param>

public JsonApiController(IDocumentMaterializerLocator documentMaterializerLocator)

{

_documentMaterializerLocator = documentMaterializerLocator;

}

/// <summary>

/// Returns a document corresponding to a set of records of this type.

/// </summary>

public virtual async Task<IHttpActionResult> GetResourceCollection(string resourceType, CancellationToken cancellationToken)

{

var materializer = _documentMaterializerLocator.GetMaterializerByResourceTypeName(resourceType);

var document = await materializer.GetRecords(Request, cancellationToken);

return Ok(document);

}

/// <summary>

/// Returns a document corresponding to the single record matching the ID.

/// </summary>

public virtual async Task<IHttpActionResult> Get(string resourceType, string id, CancellationToken cancellationToken)

{

var materializer = _documentMaterializerLocator.GetMaterializerByResourceTypeName(resourceType);

var document = await materializer.GetRecordById(id, Request, cancellationToken);

return Ok(document);

}

/// <summary>

/// Returns a document corresponding to the resource(s) related to the resource identified by the ID,

/// and the relationship name.

/// </summary>

public virtual async Task<IHttpActionResult> GetRelatedResource(string resourceType, string id, string relationshipName, CancellationToken cancellationToken)

{

var materializer = _documentMaterializerLocator.GetRelatedResourceMaterializer(resourceType, relationshipName);

var document = await materializer.GetRelatedResourceDocument(id, Request, cancellationToken);

return Ok(document);

}

/// <summary>

/// Creates a new record corresponding to the data in the request document.

/// </summary>

public virtual async Task<IHttpActionResult> Post(string resourceType, [FromBody]ISingleResourceDocument requestDocument, CancellationToken cancellationToken)

{

var materializer = _documentMaterializerLocator.GetMaterializerByResourceTypeName(resourceType);

var document = await materializer.CreateRecord(requestDocument, Request, cancellationToken);

return Ok(document);

}

/// <summary>

/// Updates the record with the given ID with data from the request payloaad.

/// </summary>

public virtual async Task<IHttpActionResult> Patch(string resourceType, string id, [FromBody]ISingleResourceDocument requestDocument, CancellationToken cancellationToken)

{

var materializer = _documentMaterializerLocator.GetMaterializerByResourceTypeName(resourceType);

var document = await materializer.UpdateRecord(id, requestDocument, Request, cancellationToken);

return Ok(document);

}

/// <summary>

/// Deletes the record corresponding to the ID.

/// </summary>

public virtual async Task<IHttpActionResult> Delete(string resourceType, string id, CancellationToken cancellationToken)

{

var materializer = _documentMaterializerLocator.GetMaterializerByResourceTypeName(resourceType);

var document = await materializer.DeleteRecord(id, cancellationToken);

return Ok(document);

}

}

}