// Copyright (C) 2008 The Android Open Source Project
//
// 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.

package com.google.gerrit.common.data;

import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.ApprovalCategory;
import com.google.gerrit.reviewdb.client.PatchSetApproval;

import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class ApprovalDetail {
  public static final Comparator<ApprovalDetail> SORT =
      new Comparator<ApprovalDetail>() {
        public int compare(final ApprovalDetail o1, final ApprovalDetail o2) {
          int cmp;
          cmp = o2.hasNonZero - o1.hasNonZero;
          if (cmp != 0) return cmp;
          return o1.sortOrder.compareTo(o2.sortOrder);
        }
      };

  static final Timestamp EG_0 = new Timestamp(0);
  static final Timestamp EG_D = new Timestamp(Long.MAX_VALUE);

  protected Account.Id account;
  protected List<PatchSetApproval> approvals;
  protected boolean canRemove;

  private transient Set<String> approved;
  private transient Set<String> rejected;
  private transient int hasNonZero;
  private transient Timestamp sortOrder = EG_D;

  protected ApprovalDetail() {
  }

  public ApprovalDetail(final Account.Id id) {
    account = id;
    approvals = new ArrayList<PatchSetApproval>();
  }

  public Account.Id getAccount() {
    return account;
  }

  public boolean canRemove() {
    return canRemove;
  }

  public void setCanRemove(boolean removeable) {
    canRemove = removeable;
  }

  public List<PatchSetApproval> getPatchSetApprovals() {
    return approvals;
  }

  public PatchSetApproval getPatchSetApproval(ApprovalCategory.Id category) {
    for (PatchSetApproval psa : approvals) {
      if (psa.getCategoryId().equals(category)) {
        return psa;
      }
    }
    return null;
  }

  public void sortFirst() {
    hasNonZero = 1;
    sortOrder = ApprovalDetail.EG_0;
  }

  public void add(final PatchSetApproval ca) {
    approvals.add(ca);

    final Timestamp g = ca.getGranted();
    if (g != null && g.compareTo(sortOrder) < 0) {
      sortOrder = g;
    }
    if (ca.getValue() != 0) {
      hasNonZero = 1;
    }
  }

  public void approved(String label) {
    if (approved == null) {
      approved = new HashSet<String>();
    }
    approved.add(label);
  }

  public void rejected(String label) {
    if (rejected == null) {
      rejected = new HashSet<String>();
    }
    rejected.add(label);
  }

  public boolean isApproved(String label) {
    return approved != null && approved.contains(label);
  }

  public boolean isRejected(String label) {
    return rejected != null && rejected.contains(label);
  }
}