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package io.resys.thena.docdb.api.actions;

import java.time.LocalDateTime;

/*-
 * #%L
 * thena-docdb-api
 * %%
 * Copyright (C) 2021 Copyright 2021 ReSys OÜ
 * %%
 * 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.
 * #L%
 */

import java.util.List;
import java.util.Map;

import javax.annotation.Nullable;

import org.immutables.value.Value;

import io.resys.thena.docdb.api.models.Message;
import io.resys.thena.docdb.api.models.Objects;
import io.resys.thena.docdb.api.models.Objects.Blob;
import io.resys.thena.docdb.api.models.Objects.Commit;
import io.resys.thena.docdb.api.models.Objects.Ref;
import io.resys.thena.docdb.api.models.Objects.Tree;
import io.resys.thena.docdb.api.models.Repo;
import io.smallrye.mutiny.Uni;

public interface ObjectsActions {
  
  RepoStateBuilder repoState();
  RefStateBuilder refState();
  CommitStateBuilder commitState();
  BlobStateBuilder blobState();
  
  interface BlobStateBuilder {
    BlobStateBuilder repo(String repoName);
    BlobStateBuilder anyId(String refOrCommitOrTag);
    BlobStateBuilder blobNames(List blobName);
    BlobStateBuilder blobName(String blobName);
    BlobStateBuilder matchBy(List blobCriteria);
    
    Uni> get();
    Uni> list();
  }
  
  // build world state
  interface RepoStateBuilder {
    RepoStateBuilder repo(String repoName);
    Uni> build();
  }

  // build REF world state, no blobs by default
  interface CommitStateBuilder {
    CommitStateBuilder repo(String repoName);
    CommitStateBuilder anyId(String refOrCommitOrTag);
    CommitStateBuilder blobs();
    CommitStateBuilder blobs(boolean load);
    Uni> build();
  }
  
  // build REF world state, no blobs by default
  interface RefStateBuilder {
    RefStateBuilder repo(String repoName);
    RefStateBuilder ref(String ref);
    RefStateBuilder blobs();
    RefStateBuilder blobs(boolean load);
    Uni> build();
  }

  @Value.Immutable
  interface CommitObjects {
    Repo getRepo();
    Commit getCommit();
    Tree getTree();
    Map getBlobs(); //only if loaded
  }

  @Value.Immutable
  interface RefObjects {
    Repo getRepo();
    Ref getRef();
    Commit getCommit();
    Tree getTree();
    Map getBlobs(); //only if loaded
  }
  
  @Value.Immutable
  interface BlobObject {
    Repo getRepo();
// TODO::    Ref getRef();
    Commit getCommit();
    Tree getTree();
    Blob getBlob();
  }

  @Value.Immutable
  interface BlobObjects {
    Repo getRepo();
// TODO::    Ref getRef();
    Commit getCommit();
    Tree getTree();
    List getBlob();
  }
  
  enum ObjectsStatus {
    OK, ERROR
  }
  
  @Value.Immutable
  interface ObjectsResult {
    @Nullable
    Repo getRepo();    
    @Nullable
    T getObjects();
    ObjectsStatus getStatus();
    List getMessages();
  }
  

  @Value.Immutable  
  interface MatchCriteria {
    MatchCriteriaType getType();
    String getKey();
    
    @Nullable String getValue();
    @Nullable LocalDateTime getTargetDate();
    
    public static MatchCriteria like(String documentField, String valueToMatch) {
      return ImmutableMatchCriteria.builder()
      .key(documentField).value(valueToMatch)
      .type(MatchCriteriaType.LIKE)
      .build();
    }
    
    public static MatchCriteria equalsTo(String documentField, String valueToMatch) {
      return ImmutableMatchCriteria.builder()
      .key(documentField).value(valueToMatch)
      .type(MatchCriteriaType.EQUALS)
      .build();
    }
    public static MatchCriteria notNull(String documentField) {
      return ImmutableMatchCriteria.builder()
      .key(documentField)
      .type(MatchCriteriaType.NOT_NULL)
      .build();
    }
    
    public static MatchCriteria greaterThanOrEqualTo(String documentField, LocalDateTime valueToMatch) {
      return ImmutableMatchCriteria.builder()
      .key(documentField)
      .type(MatchCriteriaType.GTE)
      .targetDate(valueToMatch)
      .build();
    }
  }
  
  enum MatchCriteriaType {
    EQUALS, LIKE, NOT_NULL, 
    
    //Greater Than or Equal to
    GTE;
    

  }
}