package com.box.sdk;

import com.eclipsesource.json.Json;
import com.eclipsesource.json.JsonObject;
import com.eclipsesource.json.JsonValue;
import java.net.URL;
import java.text.ParseException;
import java.util.Date;

/**
 * Represents a device pin.
 *
 * <p>Unless otherwise noted, the methods in this class can throw an unchecked {@link
 * BoxAPIException} (unchecked meaning that the compiler won't force you to handle it) if an error
 * occurs. If you wish to implement custom error handling for errors related to the Box REST API,
 * you should capture this exception explicitly.
 */
@BoxResourceType("device_pin")
public class BoxDevicePin extends BoxResource {

  /** The URL template used for operation with the device pin. */
  public static final URLTemplate DEVICE_PIN_URL_TEMPLATE = new URLTemplate("device_pinners/%s");

  /** The URL template used to get all the device pins within a given enterprise. */
  public static final URLTemplate ENTERPRISE_DEVICE_PINS_TEMPLATE =
      new URLTemplate("enterprises/%s/device_pinners");

  /** Default limit of the device info entries per one response page. */
  private static final int DEVICES_DEFAULT_LIMIT = 100;

  /**
   * Constructs a device pin for a resource with a given ID.
   *
   * @param api the API connection to be used by the resource.
   * @param id the ID of the resource.
   */
  public BoxDevicePin(BoxAPIConnection api, String id) {
    super(api, id);
  }

  /**
   * Returns iterable with all the device pins within a given enterprise. Must be an enterprise
   * admin with the manage enterprise scope to make this call.
   *
   * @param api API used to connect the Box.
   * @param enterpriseID ID of the enterprise to get all the device pins within.
   * @param fields the optional fields to retrieve.
   * @return iterable with all the device pins within a given enterprise.
   */
  public static Iterable<BoxDevicePin.Info> getEnterpriceDevicePins(
      final BoxAPIConnection api, String enterpriseID, String... fields) {
    return getEnterpriceDevicePins(api, enterpriseID, DEVICES_DEFAULT_LIMIT, fields);
  }

  /**
   * Returns iterable with all the device pins within a given enterprise. Must be an enterprise
   * admin with the manage enterprise scope to make this call.
   *
   * @param api API used to connect the Box.
   * @param enterpriseID ID of the enterprise to get all the device pins within.
   * @param limit the maximum number of items per single response.
   * @param fields the optional fields to retrieve.
   * @return iterable with all the device pins within a given enterprise.
   */
  public static Iterable<BoxDevicePin.Info> getEnterpriceDevicePins(
      final BoxAPIConnection api, String enterpriseID, int limit, String... fields) {
    QueryStringBuilder builder = new QueryStringBuilder();
    if (fields.length > 0) {
      builder.appendParam("fields", fields);
    }
    return new BoxResourceIterable<BoxDevicePin.Info>(
        api,
        ENTERPRISE_DEVICE_PINS_TEMPLATE.buildWithQuery(
            api.getBaseURL(), builder.toString(), enterpriseID),
        limit) {

      @Override
      protected BoxDevicePin.Info factory(JsonObject jsonObject) {
        BoxDevicePin pin = new BoxDevicePin(api, jsonObject.get("id").asString());
        return pin.new Info(jsonObject);
      }
    };
  }

  /**
   * Gets information about the device pin.
   *
   * @param fields the fields to retrieve.
   * @return info about the device pin.
   */
  public Info getInfo(String... fields) {
    QueryStringBuilder builder = new QueryStringBuilder();
    if (fields.length > 0) {
      builder.appendParam("fields", fields);
    }
    URL url =
        DEVICE_PIN_URL_TEMPLATE.buildWithQuery(
            this.getAPI().getBaseURL(), builder.toString(), this.getID());
    BoxJSONRequest request = new BoxJSONRequest(this.getAPI(), url, "GET");
    try (BoxJSONResponse response = request.send()) {
      JsonObject responseJSON = Json.parse(response.getJSON()).asObject();
      return new Info(responseJSON);
    }
  }

  /** Deletes the device pin. */
  public void delete() {
    URL url = DEVICE_PIN_URL_TEMPLATE.build(this.getAPI().getBaseURL(), this.getID());
    BoxAPIRequest request = new BoxAPIRequest(this.getAPI(), url, "DELETE");
    request.send().close();
  }

  /** Contains information about a task assignment. */
  public class Info extends BoxResource.Info {

    /** @see #getOwnedBy() */
    private BoxUser.Info ownedBy;

    /** @see #getProductName() */
    private String productName;

    /** @see #getCreatedAt() */
    private Date createdAt;

    /** @see #getModifiedAt() */
    private Date modifiedAt;

    /** Constructs an empty Info object. */
    public Info() {
      super();
    }

    /**
     * Constructs an Info object by parsing information from a JSON string.
     *
     * @param json the JSON string to parse.
     */
    public Info(String json) {
      super(json);
    }

    /**
     * Constructs an Info object using an already parsed JSON object.
     *
     * @param jsonObject the parsed JSON object.
     */
    Info(JsonObject jsonObject) {
      super(jsonObject);
    }

    /** {@inheritDoc} */
    @Override
    public BoxResource getResource() {
      return BoxDevicePin.this;
    }

    /**
     * Gets ID of the user that the pin belongs to.
     *
     * @return ID of the user that the pin belongs to.
     */
    public BoxUser.Info getOwnedBy() {
      return this.ownedBy;
    }

    /**
     * Gets the type of device being pinned.
     *
     * @return the type of device being pinned.
     */
    public String getProductName() {
      return this.productName;
    }

    /**
     * Gets the time this pin was created.
     *
     * @return the time this pin was created.
     */
    public Date getCreatedAt() {
      return this.createdAt;
    }

    /**
     * Gets the time this pin was modified.
     *
     * @return the time this pin was modified.
     */
    public Date getModifiedAt() {
      return this.modifiedAt;
    }

    /** {@inheritDoc} */
    @Override
    void parseJSONMember(JsonObject.Member member) {
      super.parseJSONMember(member);

      String memberName = member.getName();
      JsonValue value = member.getValue();
      try {
        if (memberName.equals("owned_by")) {
          JsonObject userJSON = value.asObject();
          if (this.ownedBy == null) {
            String userID = userJSON.get("id").asString();
            BoxUser user = new BoxUser(getAPI(), userID);
            this.ownedBy = user.new Info(userJSON);
          } else {
            this.ownedBy.update(userJSON);
          }
        } else if (memberName.equals("product_name")) {
          this.productName = value.asString();
        } else if (memberName.equals("created_at")) {
          this.createdAt = BoxDateFormat.parse(value.asString());
        } else if (memberName.equals("modified_at")) {
          this.modifiedAt = BoxDateFormat.parse(value.asString());
        }
      } catch (ParseException e) {
        assert false : "A ParseException indicates a bug in the SDK.";
      }
    }
  }
}