/*
    * Copyright 2023 LINE Corporation
    *
    * LINE Corporation licenses this file to you 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:
    *
    *   https://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.linecorp.centraldogma.server.internal.storage.repository;
  
  import static com.google.common.base.MoreObjects.firstNonNull;
  import static com.linecorp.centraldogma.server.mirror.MirrorSchemes.SCHEME_DOGMA;
  import static java.util.Objects.requireNonNull;
  
  import java.net.URI;
  
  import javax.annotation.Nullable;
  
  import com.cronutils.model.Cron;
  import com.cronutils.model.CronType;
  import com.cronutils.model.definition.CronDefinitionBuilder;
  import com.cronutils.parser.CronParser;
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
  import com.fasterxml.jackson.annotation.JsonInclude;
  import com.fasterxml.jackson.annotation.JsonInclude.Include;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.google.common.base.MoreObjects;
  import com.google.common.collect.Streams;
  
  import com.linecorp.centraldogma.server.mirror.MirrorDirection;
  
  // ignoreUnknown = true for backward compatibility since `type` field is removed.
  @JsonIgnoreProperties(ignoreUnknown = true)
  @JsonInclude(Include.NON_NULL)
  public final class MirrorConfig {
  
      public static final String DEFAULT_SCHEDULE = "0 * * * * ?"; // Every minute
  
      public static final CronParser CRON_PARSER = new CronParser(
              CronDefinitionBuilder.instanceDefinitionFor(CronType.QUARTZ));
  
      private final String id;
      private final boolean enabled;
      private final MirrorDirection direction;
      private final String localRepo;
      private final String localPath;
      private final URI remoteUri;
      @Nullable
      private final String gitignore;
      private final String credentialName;
      @Nullable
      private final Cron schedule;
      @Nullable
      private final String zone;
  
      @JsonCreator
      public MirrorConfig(@JsonProperty("id") String id,
                          @JsonProperty("enabled") @Nullable Boolean enabled,
                          @JsonProperty("schedule") @Nullable String schedule,
                          @JsonProperty(value = "direction", required = true) MirrorDirection direction,
                          @JsonProperty(value = "localRepo", required = true) String localRepo,
                          @JsonProperty("localPath") @Nullable String localPath,
                          @JsonProperty(value = "remoteUri", required = true) URI remoteUri,
                          @JsonProperty("gitignore") @Nullable Object gitignore,
                          // TODO(minwoox): Remove this credentialId property after migration is done.
                          @JsonProperty("credentialId") @Nullable String credentialId,
                          @JsonProperty("credentialName") @Nullable String credentialName,
                          @JsonProperty("zone") @Nullable String zone) {
          this(id, enabled, schedule != null ? CRON_PARSER.parse(schedule) : null, direction, localRepo,
               localPath, remoteUri, gitignore,
               requireNonNull(firstNonNull(credentialName, credentialId), "credentialName"),
               zone);
      }
  
      private MirrorConfig(String id, @Nullable Boolean enabled, @Nullable Cron schedule,
                           MirrorDirection direction, String localRepo, @Nullable String localPath,
                           URI remoteUri, @Nullable Object gitignore, String credentialName,
                           @Nullable String zone) {
          this.id = requireNonNull(id, "id");
          this.enabled = firstNonNull(enabled, true);
          this.schedule = schedule;
          this.direction = requireNonNull(direction, "direction");
          this.localRepo = requireNonNull(localRepo, "localRepo");
          this.localPath = firstNonNull(localPath, "/");
          this.remoteUri = requireNonNull(remoteUri, "remoteUri");
  
          // Validate the remote URI.
          final String suffix = remoteUri.getScheme().equals(SCHEME_DOGMA) ? "dogma" : "git";
          RepositoryUri.parse(remoteUri, suffix);
 
         if (gitignore != null) {
             if (gitignore instanceof Iterable &&
                 Streams.stream((Iterable<?>) gitignore).allMatch(String.class::isInstance)) {
                 this.gitignore = String.join("\n", (Iterable<String>) gitignore);
             } else if (gitignore instanceof String) {
                 this.gitignore = (String) gitignore;
             } else {
                 throw new IllegalArgumentException(
                         "gitignore: " + gitignore + " (expected: either a string or an array of strings)");
             }
         } else {
             this.gitignore = null;
         }
         this.credentialName = requireNonNull(credentialName, "credentialName");
         this.zone = zone;
     }
 
     public MirrorConfig withCredentialName(String credentialName) {
         return new MirrorConfig(id, enabled, schedule, direction, localRepo, localPath, remoteUri,
                                 gitignore, credentialName, zone);
     }
 
     @JsonProperty("id")
     public String id() {
         return id;
     }
 
     @JsonProperty("enabled")
     public boolean enabled() {
         return enabled;
     }
 
     @JsonProperty("direction")
     public MirrorDirection direction() {
         return direction;
     }
 
     @JsonProperty("localRepo")
     public String localRepo() {
         return localRepo;
     }
 
     @JsonProperty("localPath")
     public String localPath() {
         return localPath;
     }
 
     @JsonProperty("remoteUri")
     public String remoteUri() {
         return remoteUri.toString();
     }
 
     URI rawRemoteUri() {
         return remoteUri;
     }
 
     @JsonProperty("gitignore")
     @Nullable
     public String gitignore() {
         return gitignore;
     }
 
     @JsonProperty("credentialName")
     public String credentialName() {
         return credentialName;
     }
 
     @Nullable
     @JsonProperty("schedule")
     public String schedule() {
         if (schedule != null) {
             return schedule.asString();
         } else {
             return null;
         }
     }
 
     @Nullable
     Cron cronSchedule() {
         return schedule;
     }
 
     @Nullable
     @JsonProperty("zone")
     public String zone() {
         return zone;
     }
 
     @Override
     public String toString() {
         return MoreObjects.toStringHelper(this).omitNullValues()
                           .add("enabled", enabled)
                           .add("direction", direction)
                           .add("localRepo", localRepo)
                           .add("localPath", localPath)
                           .add("remoteUri", remoteUri)
                           .add("gitignore", gitignore)
                           .add("credentialName", credentialName)
                           .add("schedule", schedule)
                           .add("zone", zone)
                           .toString();
     }
 }