package com.box.sdk;

import com.eclipsesource.json.JsonObject;
import com.eclipsesource.json.JsonValue;
import java.util.Date;

/** Represents a link to a file or folder on Box. */
public class BoxSharedLink extends BoxJSONObject {
  private String url;
  private String downloadUrl;
  private String vanityUrl;
  private String vanityName;
  private boolean isPasswordEnabled;
  private String password;
  private Date unsharedAt;
  private long downloadCount;
  private long previewCount;
  private Access access;
  private Access effectiveAccess;
  private Permissions permissions;

  /** Constructs a BoxSharedLink with default settings. */
  public BoxSharedLink() {}

  /**
   * Constructs a BoxSharedLink from a JSON string.
   *
   * @param json the JSON encoded shared link.
   */
  public BoxSharedLink(String json) {
    super(json);
  }

  BoxSharedLink(JsonObject jsonObject) {
    super(jsonObject);
  }

  BoxSharedLink(
      BoxSharedLink.Access access, Date unshareDate, BoxSharedLink.Permissions permissions) {
    this.setAccess(access);
    this.setPermissions(permissions);

    if (unshareDate != null) {
      this.setUnsharedDate(unshareDate);
    }
  }

  BoxSharedLink(
      BoxSharedLink.Access access,
      Date unshareDate,
      BoxSharedLink.Permissions permissions,
      String password) {
    this.setAccess(access);
    this.setPermissions(permissions);
    this.setPassword(password);

    if (unshareDate != null) {
      this.setUnsharedDate(unshareDate);
    }
  }

  /**
   * Get the URL of this shared link.
   *
   * @return the URL of this shared link.
   */
  public String getURL() {
    return this.url;
  }

  /**
   * Gets the direct download URL of this shared link.
   *
   * @return the direct download URL of this shared link.
   */
  public String getDownloadURL() {
    return this.downloadUrl;
  }

  /**
   * Gets the vanity URL of this shared link.
   *
   * @return the vanity URL of this shared link.
   */
  public String getVanityURL() {
    return this.vanityUrl;
  }

  /**
   * Returns vanity name used to create vanity URL.
   *
   * @return Vanity name
   */
  public String getVanityName() {
    return vanityName;
  }

  /**
   * Sets vanity name used to create vanity URL. For example: vanityName = myCustomName will produce
   * vanityUrl as: https://app.box.com/v/myCustomName Custom URLs should not be used when sharing
   * sensitive content as vanity URLs are a lot easier to guess than regular shared links.
   *
   * @param vanityName Vanity name. Vanity name must be at least 12 characters long.
   */
  public void setVanityName(String vanityName) {
    if (vanityName != null && vanityName.length() < 12) {
      throw new IllegalArgumentException("The vanityName has to be at least 12 characters long.");
    }
    this.vanityName = vanityName;
    this.addPendingChange("vanity_name", vanityName);
  }

  /**
   * Gets whether or not a password is enabled on this shared link.
   *
   * @return true if there's a password enabled on this shared link; otherwise false.
   */
  public boolean getIsPasswordEnabled() {
    return this.isPasswordEnabled;
  }

  /**
   * Gets the time that this shared link will be deactivated.
   *
   * @return the time that this shared link will be deactivated.
   */
  public Date getUnsharedDate() {
    return this.unsharedAt;
  }

  /**
   * Sets the time that this shared link will be deactivated.
   *
   * @param unsharedDate the time that this shared link will be deactivated.
   */
  public void setUnsharedDate(Date unsharedDate) {
    this.unsharedAt = unsharedDate;
    this.addPendingChange("unshared_at", BoxDateFormat.format(unsharedDate));
  }

  /**
   * Gets the number of times that this shared link has been downloaded.
   *
   * @return the number of times that this link has been downloaded.
   */
  public long getDownloadCount() {
    return this.downloadCount;
  }

  /**
   * Gets the number of times that this shared link has been previewed.
   *
   * @return the number of times that this link has been previewed.
   */
  public long getPreviewCount() {
    return this.previewCount;
  }

  /**
   * Gets the access level of this shared link.
   *
   * @return the access level of this shared link.
   */
  public Access getAccess() {
    return this.access;
  }

  /**
   * Sets the access level of this shared link.
   *
   * @param access the new access level of this shared link.
   */
  public void setAccess(Access access) {
    this.access = access;
    this.addPendingChange("access", access.toJSONValue());
  }

  /**
   * Sets the password of this shared link.
   *
   * @param password the password of this shared link.
   */
  public void setPassword(String password) {
    this.password = password;
    this.addPendingChange("password", password);
  }

  /**
   * Gets the effective access level of this shared link.
   *
   * @return the effective access level of this shared link.
   *     <p>Note there is no setEffectiveAccess metho becaused this cannot be changed via the API
   */
  public Access getEffectiveAccess() {
    return this.effectiveAccess;
  }

  /**
   * Gets the permissions associated with this shared link.
   *
   * @return the permissions associated with this shared link.
   */
  public Permissions getPermissions() {
    return this.permissions;
  }

  /**
   * Sets the permissions associated with this shared link.
   *
   * @param permissions the new permissions for this shared link.
   */
  public void setPermissions(Permissions permissions) {
    if (this.permissions != null && this.permissions.equals(permissions)) {
      return;
    }

    this.removeChildObject("permissions");
    this.permissions = permissions;
    this.addChildObject("permissions", permissions);
  }

  private Access parseAccessValue(JsonValue value) {
    String accessString = value.asString().toUpperCase(java.util.Locale.ROOT);
    return Access.valueOf(accessString);
  }

  @Override
  protected JsonObject getPendingJSONObject() {
    JsonObject result = super.getPendingJSONObject();
    if (result == null) {
      result = new JsonObject();
    }
    return result;
  }

  @Override
  void parseJSONMember(JsonObject.Member member) {
    JsonValue value = member.getValue();
    String memberName = member.getName();

    try {
      if (memberName.equals("url")) {
        this.url = value.asString();
      } else if (memberName.equals("download_url")) {
        this.downloadUrl = value.asString();
      } else if (memberName.equals("vanity_url")) {
        this.vanityUrl = value.asString();
      } else if (memberName.equals("vanity_name")) {
        this.vanityName = value.asString();
      } else if (memberName.equals("is_password_enabled")) {
        this.isPasswordEnabled = value.asBoolean();
      } else if (memberName.equals("unshared_at")) {
        this.unsharedAt = BoxDateFormat.parse(value.asString());
      } else if (memberName.equals("download_count")) {
        this.downloadCount = Double.valueOf(value.toString()).longValue();
      } else if (memberName.equals("preview_count")) {
        this.previewCount = Double.valueOf(value.toString()).longValue();
      } else if (memberName.equals("access")) {
        this.access = this.parseAccessValue(value);
      } else if (memberName.equals("effective_access")) {
        this.effectiveAccess = this.parseAccessValue(value);
      } else if (memberName.equals("permissions")) {
        if (this.permissions == null) {
          this.setPermissions(new Permissions(value.asObject()));
        } else {
          this.permissions.update(value.asObject());
        }
      }
    } catch (Exception e) {
      throw new BoxDeserializationException(memberName, value.toString(), e);
    }
  }

  public static String getSharedLinkHeaderValue(String sharedLink, String password) {
    String boxAPIValue = "shared_link=" + sharedLink;
    if (password != null) {
      boxAPIValue += "&shared_link_password=" + password;
    }
    return boxAPIValue;
  }

  /** Enumerates the possible access levels that can be set on a shared link. */
  public enum Access {
    /** The default access level for the user or enterprise. */
    DEFAULT(null),

    /** The link can be accessed by anyone. */
    OPEN("open"),

    /** The link can be accessed by other users within the company. */
    COMPANY("company"),

    /** The link can be accessed by other collaborators. */
    COLLABORATORS("collaborators");

    private final String jsonValue;

    Access(String jsonValue) {
      this.jsonValue = jsonValue;
    }

    String toJSONValue() {
      return this.jsonValue;
    }
  }

  /** Contains permissions fields that can be set on a shared link. */
  public static class Permissions extends BoxJSONObject {
    private boolean canDownload;
    private boolean canPreview;
    private boolean canEdit;

    /** Constructs a Permissions object with all permissions disabled. */
    public Permissions() {}

    Permissions(boolean canPreview, boolean canDownload, boolean canEdit) {
      this.setCanPreview(canPreview);
      this.setCanDownload(canDownload);
      this.setCanEdit(canEdit);
    }

    /**
     * Constructs a Permissions object from a JSON string.
     *
     * @param json the JSON encoded shared link permissions.
     */
    public Permissions(String json) {
      super(json);
    }

    Permissions(JsonObject jsonObject) {
      super(jsonObject);
    }

    /**
     * Gets whether the shared link can be downloaded.
     *
     * @return true if the shared link can be downloaded; otherwise false.
     */
    public boolean getCanDownload() {
      return this.canDownload;
    }

    /**
     * Sets whether or not the shared link can be downloaded.
     *
     * @param enabled true if the shared link can be downloaded; otherwise false.
     */
    public void setCanDownload(boolean enabled) {
      this.canDownload = enabled;
      this.addPendingChange("can_download", enabled);
    }

    /**
     * Gets whether the shared link can be previewed.
     *
     * @return true if the shared link can be previewed; otherwise false.
     */
    public boolean getCanPreview() {
      return this.canPreview;
    }

    /**
     * Sets whether the shared link can be previewed.
     *
     * @param enabled true if the shared link can be previewed; otherwise false.
     */
    public void setCanPreview(boolean enabled) {
      this.canPreview = enabled;
      this.addPendingChange("can_preview", enabled);
    }

    /**
     * Gets whether the shared link allows for editing of files.
     *
     * @return true if the shared link allows for editing of files; otherwise false.
     */
    public boolean getCanEdit() {
      return canEdit;
    }

    /**
     * Sets whether the shared link allows for editing of files. For folders this value will always
     * be set to false.
     *
     * @param enabled true if the shared link allows for editing of files; otherwise false.
     */
    public void setCanEdit(boolean enabled) {
      this.canEdit = enabled;
      this.addPendingChange("can_edit", enabled);
    }

    @Override
    void parseJSONMember(JsonObject.Member member) {
      JsonValue value = member.getValue();
      String memberName = member.getName();
      if (memberName.equals("can_download")) {
        this.canDownload = value.asBoolean();
      }
      if (memberName.equals("can_preview")) {
        this.canPreview = value.asBoolean();
      }
      if (memberName.equals("can_edit")) {
        this.canEdit = value.asBoolean();
      }
    }

    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || this.getClass() != o.getClass()) {
        return false;
      }

      Permissions that = (Permissions) o;

      return this.canDownload == that.canDownload
          && this.canPreview == that.canPreview
          && this.canEdit == that.canEdit;
    }

    @Override
    public int hashCode() {
      int result = (this.canDownload ? 1 : 0);
      result = 31 * result + (this.canPreview ? 1 : 0);
      result = 31 * result + (this.canEdit ? 1 : 0);
      return result;
    }

    @Override
    public String toString() {
      return "Permissions{canDownload="
          + this.canDownload
          + ", canPreview="
          + this.canPreview
          + ", canEdit="
          + this.canEdit
          + '}';
    }
  }
}