package de.ph87.data.topic.query;

import de.ph87.data.series.Series;
import jakarta.annotation.Nullable;
import jakarta.persistence.Column;
import jakarta.persistence.Embeddable;
import jakarta.persistence.EnumType;
import jakarta.persistence.Enumerated;
import jakarta.persistence.ManyToOne;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.NonNull;
import lombok.ToString;

@Getter
@ToString
@Embeddable
@NoArgsConstructor
public class TopicQuery {

  @Nullable
  @ManyToOne
  private Series series;

  @NonNull
  @Column(nullable = false)
  private String valueQuery = "";

  @NonNull
  @Column(nullable = false)
  private String beginQuery = "";

  @NonNull
  @Column(nullable = false)
  private String terminatedQuery = "";

  @NonNull
  @Column(nullable = false)
  @Enumerated(EnumType.STRING)
  private TopicQuery.Function function = Function.NONE;

  @Column(nullable = false)
  private double factor;

  public TopicQuery(
    @Nullable final Series series,
    @NonNull final String valueQuery
  ) {
    this(series, valueQuery, "", "");
  }

  public TopicQuery(
    @Nullable final Series series,
    @NonNull final String valueQuery,
    final double factor
  ) {
    this(series, valueQuery, factor, Function.NONE, "", "");
  }

  public TopicQuery(
    @Nullable final Series series,
    @NonNull final String valueQuery,
    final double factor,
    @NonNull final TopicQuery.Function function
  ) {
    this(series, valueQuery, factor, function, "", "");
  }

  public TopicQuery(
    @Nullable final Series series,
    @NonNull final String valueQuery,
    @NonNull final String beginQuery,
    @NonNull final String terminatedQuery
  ) {
    this(series, valueQuery, 1, Function.NONE, beginQuery, terminatedQuery);
  }

  public TopicQuery(
    @Nullable final Series series,
    @NonNull final String valueQuery,
    final double factor,
    @NonNull final TopicQuery.Function function,
    @NonNull final String beginQuery,
    @NonNull final String terminatedQuery
  ) {
    this.series = series;
    this.valueQuery = valueQuery;
    this.beginQuery = beginQuery;
    this.terminatedQuery = terminatedQuery;
    this.function = function;
    this.factor = factor;
  }

  public enum Function {
    NONE(v -> v),
    ONLY_POSITIVE(v -> v > 0 ? v : 0),
    ONLY_NEGATIVE_BUT_NEGATE(v -> v < 0 ? -v : 0),
    ;

    private final java.util.function.Function<Double, Double> function;

    Function(@NonNull java.util.function.Function<Double, Double> function) {
      this.function = function;
    }

    public double apply(final double value) {
      return function.apply(value);
    }

  }

}