content: package dev.ai4j.openai4j.chat;
  
  import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
  import com.fasterxml.jackson.annotation.JsonInclude;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.fasterxml.jackson.databind.PropertyNamingStrategies;
  import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
  import com.fasterxml.jackson.databind.annotation.JsonNaming;
  import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
  import dev.ai4j.openai4j.shared.Usage;
  
  import java.util.List;
  import java.util.Objects;
  
  import static java.util.Collections.unmodifiableList;
  
  @JsonDeserialize(builder = ChatCompletionResponse.Builder.class)
  @JsonInclude(JsonInclude.Include.NON_NULL)
  @JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
  public final class ChatCompletionResponse {
  
      @JsonProperty
      private final String id;
      @JsonProperty
      private final Integer created;
      @JsonProperty
      private final String model;
      @JsonProperty
      private final List<ChatCompletionChoice> choices;
      @JsonProperty
      private final Usage usage;
      @JsonProperty
      private final String systemFingerprint;
      @JsonProperty
      private final String serviceTier;
  
      private ChatCompletionResponse(Builder builder) {
          this.id = builder.id;
          this.created = builder.created;
          this.model = builder.model;
          this.choices = builder.choices;
          this.usage = builder.usage;
          this.systemFingerprint = builder.systemFingerprint;
          this.serviceTier = builder.serviceTier;
      }
  
      public String id() {
          return id;
      }
  
      public Integer created() {
          return created;
      }
  
      public String model() {
          return model;
      }
  
      public List<ChatCompletionChoice> choices() {
          return choices;
      }
  
      public Usage usage() {
          return usage;
      }
  
      public String systemFingerprint() {
          return systemFingerprint;
      }
  
      public String serviceTier() {
          return serviceTier;
      }
  
      /**
       * Convenience method to get the content of the message from the first choice.
       */
      public String content() {
          return choices().get(0).message().content();
      }
  
      @Override
      public boolean equals(Object another) {
          if (this == another) return true;
          return another instanceof ChatCompletionResponse
                  && equalTo((ChatCompletionResponse) another);
      }
  
      private boolean equalTo(ChatCompletionResponse another) {
          return Objects.equals(id, another.id)
                  && Objects.equals(created, another.created)
                  && Objects.equals(model, another.model)
                  && Objects.equals(choices, another.choices)
                  && Objects.equals(usage, another.usage)
                  && Objects.equals(systemFingerprint, another.systemFingerprint)
                  && Objects.equals(serviceTier, another.serviceTier);
      }
  
      @Override
      public int hashCode() {
          int h = 5381;
          h += (h << 5) + Objects.hashCode(id);
          h += (h << 5) + Objects.hashCode(created);
          h += (h << 5) + Objects.hashCode(model);
          h += (h << 5) + Objects.hashCode(choices);
          h += (h << 5) + Objects.hashCode(usage);
          h += (h << 5) + Objects.hashCode(systemFingerprint);
          h += (h << 5) + Objects.hashCode(serviceTier);
          return h;
      }
  
      @Override
      public String toString() {
          return "ChatCompletionResponse{"
                  + "id=" + id
                  + ", created=" + created
                  + ", model=" + model
                  + ", choices=" + choices
                  + ", usage=" + usage
                  + ", systemFingerprint=" + systemFingerprint
                  + ", serviceTier=" + serviceTier
                  + "}";
      }
  
      public static Builder builder() {
          return new Builder();
      }
  
      @JsonPOJOBuilder(withPrefix = "")
      @JsonIgnoreProperties(ignoreUnknown = true)
      @JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
      public static final class Builder {
  
          private String id;
          private Integer created;
          private String model;
          private List<ChatCompletionChoice> choices;
          private Usage usage;
          private String systemFingerprint;
          private String serviceTier;
  
          private Builder() {
          }
  
          public Builder id(String id) {
              this.id = id;
              return this;
          }
  
          public Builder created(Integer created) {
              this.created = created;
              return this;
          }
  
          public Builder model(String model) {
              this.model = model;
              return this;
          }
  
          public Builder choices(List<ChatCompletionChoice> choices) {
              if (choices != null) {
                  this.choices = unmodifiableList(choices);
              }
              return this;
          }
  
          public Builder usage(Usage usage) {
              this.usage = usage;
              return this;
          }
  
          public Builder systemFingerprint(String systemFingerprint) {
              this.systemFingerprint = systemFingerprint;
              return this;
          }
  
          public Builder serviceTier(String serviceTier) {
              this.serviceTier = serviceTier;
              return this;
          }
  
          public ChatCompletionResponse build() {
              return new ChatCompletionResponse(this);
          }
      }
  }
  