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A web service test double for all occasions - standalone edition
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/*
 * Copyright (C) 2012-2024 Thomas Akehurst
 *
 * 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.github.tomakehurst.wiremock.stubbing;

import static java.util.stream.Collectors.toSet;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.github.tomakehurst.wiremock.common.Errors;
import com.github.tomakehurst.wiremock.common.InvalidInputException;
import com.github.tomakehurst.wiremock.common.Json;
import java.util.*;
import java.util.function.Predicate;
import java.util.stream.Collectors;

public class Scenario {

  public static final String STARTED = "Started";

  private final String id;
  private final String state;
  private final Set stubMappings;

  @JsonCreator
  public Scenario(
      @JsonProperty("id") String id,
      @JsonProperty("name") String ignored,
      @JsonProperty("state") String currentState,
      @JsonProperty("possibleStates") Set ignored2,
      @JsonProperty("mappings") Set stubMappings) {
    this.id = id;
    this.state = currentState;
    this.stubMappings = stubMappings;
  }

  private Scenario(String id, String state, Set stubMappings) {
    this(id, null, state, null, stubMappings);
  }

  public static Scenario inStartedState(String name) {
    return new Scenario(name, STARTED, Collections.emptySet());
  }

  public String getId() {
    return id;
  }

  // For JSON backwards compatibility
  public String getName() {
    return id;
  }

  public String getState() {
    return state;
  }

  public Set getPossibleStates() {
    List requiredStates =
        stubMappings.stream()
            .map(StubMapping::getRequiredScenarioState)
            .collect(Collectors.toList());

    requiredStates.addAll(
        stubMappings.stream().map(StubMapping::getNewScenarioState).collect(Collectors.toList()));

    return requiredStates.stream().filter(Objects::nonNull).collect(Collectors.toSet());
  }

  public Set getMappings() {
    return stubMappings;
  }

  Scenario setState(String newState) {
    if (!getPossibleStates().contains(newState)) {
      throw new InvalidInputException(
          Errors.single(11, "Scenario " + id + " does not support state " + newState));
    }

    return new Scenario(id, newState, stubMappings);
  }

  Scenario reset() {
    return new Scenario(id, STARTED, stubMappings);
  }

  Scenario withStubMapping(StubMapping stubMapping) {
    Set newMappings = new LinkedHashSet<>(stubMappings);
    newMappings.add(stubMapping);

    return new Scenario(id, state, newMappings);
  }

  Scenario withoutStubMapping(StubMapping stubMapping) {
    Set newMappings =
        stubMappings.stream()
            .filter(stub -> !stub.getId().equals(stubMapping.getId()))
            .collect(toSet());
    return new Scenario(id, state, newMappings);
  }

  @Override
  public String toString() {
    return Json.write(this);
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    Scenario scenario = (Scenario) o;
    return Objects.equals(getId(), scenario.getId())
        && Objects.equals(getState(), scenario.getState())
        && Objects.equals(getMappings(), scenario.getMappings());
  }

  @Override
  public int hashCode() {
    return Objects.hash(getId(), getState(), getMappings());
  }

  public static Predicate withName(final String name) {
    return input -> input.getId().equals(name);
  }
}