/*
    This file is part of KDE.

    SPDX-FileCopyrightText: 2008 Cornelius Schumacher <schumacher@kde.org>
    SPDX-FileCopyrightText: 2011 Laszlo Papp <djszapi@archlinux.us>

    SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/

#ifndef ATTICA_PROVIDER_H
#define ATTICA_PROVIDER_H

#include <QExplicitlySharedDataPointer>
#include <QSharedPointer>
#include <QString>
#include <QStringList>

#include <QUrl>

#include "achievement.h"
#include "attica_export.h"
#include "category.h"
#include "comment.h"
#include "distribution.h"
#include "forum.h"
#include "itemjob.h"
#include "license.h"
#include "listjob.h"
#include "message.h"

class QDate;
class QUrl;

namespace Attica
{
class PlatformDependent;

class PostJobStatus;

class AccountBalance;
class Activity;
class BuildServiceJobOutput;
class BuildServiceJob;
class BuildService;
class PrivateData;
class Config;
class Content;
class DownloadItem;
class Distribution;
class Event;
class Folder;
class HomePageType;
class KnowledgeBaseEntry;
class License;
class Person;
class PostJob;
class Project;
class Provider;
class Publisher;
class PublisherField;
class RemoteAccount;

/**
 * @class Provider provider.h <Attica/Provider>
 *
 * The Provider class represents one Open Collaboration Service provider.
 * Use the ProviderManager to instantiate a Provider.
 *
 * Accessing functions of the Provider returns a Job class that
 * takes care of accessing the server and parsing the result.
 *
 * Provider files are xml of the form:
 <pre>
 <provider>
 <id>opendesktop</id>
 <location>https://api.opendesktop.org/v1/</location>
 <name>openDesktop.org</name>
 <icon></icon>
 <termsofuse>https://opendesktop.org/terms/</termsofuse>
 <register>https://opendesktop.org/usermanager/new.php</register>
 <services>
   <person ocsversion="1.3" />
   <friend ocsversion="1.3" />
   <message ocsversion="1.3" />
   <activity ocsversion="1.3" />
   <content ocsversion="1.3" />
   <fan ocsversion="1.3" />
   <knowledgebase ocsversion="1.3" />
   <event ocsversion="1.3" />
   <comment ocsversion="1.2" />
 </services>
</provider>
 </pre>
 * The server provides the services specified in the services section, not necessarily all of them.
 */
class ATTICA_EXPORT Provider
{
public:
    /**
     * Default construct a Provider. Please note that this provider is incomplete and never valid.
     */
    Provider();
    Provider(const Provider &other);
    Provider &operator=(const Provider &other);
    ~Provider();

    /**
    Returns true if the provider has been set up and can be used.
    */
    bool isValid() const;

    /**
    Test if the provider is enabled by the settings.
    The application can choose to ignore this, but the user settings should be respected.
    */
    bool isEnabled() const;
    void setEnabled(bool enabled);

    /**
     * Set a custom identifier for your application (sent along with the requests as
     * the http agent header in addition to the application name and version).
     *
     * For example, you might have an application named SomeApplication, version 23,
     * and wish to send along the data "lookandfeel.knsrc". Call this function, and
     * the resulting agent header would be:
     *
     * SomeApplication/23 (+lookandfeel.knsrc)
     *
     * If you do not set this (or set it to an empty string), the agent string becomes
     *
     * SomeApplication/23
     *
     * @param additionalAgentInformation The extra string
     * @since 5.66
     */
    void setAdditionalAgentInformation(const QString &additionalInformation);
    /**
     * The custom identifier sent along with requests
     *
     * @return The custom identifier
     * @see setAdditionalAgentInformation(const QString&)
     * @since 5.66
     */
    QString additionalAgentInformation() const;

    /**
    A url that identifies this provider.
    This should be used as identifier when referring to this provider but you don't want to use the full provider object.
    */
    QUrl baseUrl() const;

    /**
    A name for the provider that can be displayed to the user
    */
    QString name() const;

    /**
     * An icon used to visually identify this provider
     * @return A URL for an icon image (or an invalid URL if one was not defined by the provider)
     * @since 5.85
     */
    QUrl icon() const;

    enum SortMode {
        Newest,
        Alphabetical,
        Rating,
        Downloads,
    };

    /**
    Test if the server supports the person part of the API
    */
    bool hasPersonService() const;
    /**
    Version of the person part of the API
    */
    QString personServiceVersion() const;

    /**
    Test if the server supports the friend part of the API
    */
    bool hasFriendService() const;

    /**
    Version of the friend part of the API
    */
    QString friendServiceVersion() const;

    /**
    Test if the server supports the message part of the API
    */
    bool hasMessageService() const;
    /**
    Version of the message part of the API
    */
    QString messageServiceVersion() const;

    /**
    Test if the server supports the achievement part of the API
    */
    bool hasAchievementService() const;
    /**
    Version of the achievement part of the API
    */
    QString achievementServiceVersion() const;

    /**
    Test if the server supports the activity part of the API
    */
    bool hasActivityService() const;
    /**
    Version of the activity part of the API
    */
    QString activityServiceVersion() const;

    /**
    Test if the server supports the content part of the API
    */
    bool hasContentService() const;
    /**
    Version of the content part of the API
    */
    QString contentServiceVersion() const;

    /**
    Test if the server supports the fan part of the API
    */
    bool hasFanService() const;
    /**
    Version of the fan part of the API
    */
    QString fanServiceVersion() const;

    /**
    Test if the server supports the forum part of the API
    */
    bool hasForumService() const;
    /**
    Version of the forum part of the API
    */
    QString forumServiceVersion() const;

    /**
     *
    Test if the server supports the knowledgebase part of the API
    */
    bool hasKnowledgebaseService() const;
    /**
    Version of the knowledgebase part of the API
    */
    QString knowledgebaseServiceVersion() const;

    /**
    Test if the server supports the comments part of the API
    */
    bool hasCommentService() const;
    /**
    Version of the comments part of the API
    */
    QString commentServiceVersion() const;

    /**
      Test if the provider has user name/password available.
      This does not yet open kwallet in case the KDE plugin is used.
      @return true if the provider has login information
    */
    bool hasCredentials() const;
    bool hasCredentials();

    /**
      Load user name and password from the store.
      Attica will remember the loaded values and use them from this point on.
      @param user reference that returns the user name
      @param password reference that returns the password
      @return if credentials could be loaded
    */
    bool loadCredentials(QString &user, QString &password);

    /**
      Sets (and remembers) user name and password for this provider.
      To remove the data an empty username should be passed.
      @param user the user (login) name
      @param password the password
      @return if credentials could be saved
    */
    bool saveCredentials(const QString &user, const QString &password);

    /**
      Test if the server accepts the login/password.
      This function does not actually set the credentials. Use saveCredentials for that purpose.
      @param user the user (login) name
      @param password the password
      @return the job that will contain the success of the login as metadata
    */
    PostJob *checkLogin(const QString &user, const QString &password);

    /**
     * Fetches server config
     * @return The job responsible for fetching data
     */
    ItemJob<Config> *requestConfig();

    // Person part of OCS

    PostJob *registerAccount(const QString &id, const QString &password, const QString &mail, const QString &firstName, const QString &lastName);
    ItemJob<Person> *requestPerson(const QString &id);
    ItemJob<Person> *requestPersonSelf();
    ItemJob<AccountBalance> *requestAccountBalance();
    ListJob<Person> *requestPersonSearchByName(const QString &name);
    ListJob<Person> *requestPersonSearchByLocation(qreal latitude, qreal longitude, qreal distance = 0.0, int page = 0, int pageSize = 20);
    PostJob *postLocation(qreal latitude, qreal longitude, const QString &city = QString(), const QString &country = QString());

    //////////////////////////
    // PrivateData part of OCS

    /**
     * Fetches the a given attribute from an OCS-compliant server.
     * @param app The application name
     * @param key The key of the attribute to fetch (optional)
     * @return The job that is responsible for fetching the data
     */
    ItemJob<PrivateData> *requestPrivateData(const QString &app, const QString &key = QString());

    /**
     * Fetches all stored private data.
     * @return The job responsible for fetching data
     */
    ItemJob<PrivateData> *requestPrivateData()
    {
        return requestPrivateData(QString(), QString());
    }

    /**
     * Sets the value of an attribute.
     * @param app The application name
     * @param key The key of the attribute
     * @param value The new value of the attribute
     * @return The job responsible for setting data
     */
    PostJob *setPrivateData(const QString &app, const QString &key, const QString &value);

    // Friend part of OCS

    ListJob<Person> *requestFriends(const QString &id, int page = 0, int pageSize = 20);
    ListJob<Person> *requestSentInvitations(int page = 0, int pageSize = 20);
    ListJob<Person> *requestReceivedInvitations(int page = 0, int pageSize = 20);
    PostJob *inviteFriend(const QString &to, const QString &message);
    PostJob *approveFriendship(const QString &to);
    PostJob *declineFriendship(const QString &to);
    PostJob *cancelFriendship(const QString &to);

    // Message part of OCS

    ListJob<Folder> *requestFolders();
    ListJob<Message> *requestMessages(const Folder &folder);
    ListJob<Message> *requestMessages(const Folder &folder, Message::Status status);
    ItemJob<Message> *requestMessage(const Folder &folder, const QString &id);
    PostJob *postMessage(const Message &message);

    // Achievement part of OCS
    /**
     * Get a list of achievements
     * @return ListJob listing Achievements
     */
    ListJob<Achievement> *requestAchievements(const QString &contentId, const QString &achievementId, const QString &userId);

    /** Add a new achievement.
     * @param id id of the achievement entry
     * @param achievement The new Achievement added
     * @return item post job for adding the new achievement
     */
    ItemPostJob<Achievement> *addNewAchievement(const QString &id, const Achievement &newAchievement);

    /**
     * Post modifications to an Achievement on the server
     * @param achievement Achievement to update on the server
     */
    PutJob *editAchievement(const QString &contentId, const QString &achievementId, const Achievement &achievement);

    /**
     * Deletes an achievement on the server. The achievement passed as an argument doesn't need complete
     * information as just the id() is used.
     * @param achievement Achievement to delete on the server.
     */
    DeleteJob *deleteAchievement(const QString &contentId, const QString &achievementId);

    // PostJob* postAchievement(const Achievement& achievement);
    PostJob *setAchievementProgress(const QString &id, const QVariant &progress, const QDateTime &timestamp);
    DeleteJob *resetAchievementProgress(const QString &id);

    // Activity part of OCS

    ListJob<Activity> *requestActivities();
    PostJob *postActivity(const QString &message);

    // Project part of OCS
    /**
     * Get a list of build service projects
     * @return ListJob listing Projects
     */
    ListJob<Project> *requestProjects();

    /**
     * Get a Project's data
     * @return ItemJob receiving data
     */
    ItemJob<Project> *requestProject(const QString &id);

    /**
     * Post modifications to a Project on the server. The resulting project ID can be found in
     * the Attica::MetaData of the finished() PostJob. You can retrieve it using
     * Attica::MetaData::resultingProjectId().
     * @param project Project to create on the server
     */
    PostJob *createProject(const Project &project);

    /**
     * Deletes a project on the server. The project passed as an argument doesn't need complete
     * information as just the id() is used.
     * @param project Project to delete on the server.
     */
    PostJob *deleteProject(const Project &project);

    /**
     * Post modifications to a Project on the server
     * @param project Project to update on the server
     */
    PostJob *editProject(const Project &project);

    // Buildservice part of OCS

    /**
     * Get the information for a specific build service instance.
     * @return ItemJob receiving data
     */
    ItemJob<BuildService> *requestBuildService(const QString &id);

    /**
     * Get the information for a specific publisher.
     * @return ItemJob receiving data
     */
    ItemJob<Publisher> *requestPublisher(const QString &id);

    /**
     * Save the value of a single publishing field
     * @return PostJob*
     */
    PostJob *savePublisherField(const Project &project, const PublisherField &field);

    /**
     * Publish the result of a completed build job to a publisher.
     * @return ItemJob receiving data
     */
    PostJob *publishBuildJob(const BuildServiceJob &buildjob, const Publisher &publisher);

    /**
     * Get the build output for a specific build service job
     * @return ItemJob receiving and containing the output data
     */
    ItemJob<BuildServiceJobOutput> *requestBuildServiceJobOutput(const QString &id);

    /**
     * Get the information for a specific build service job, such as status and progress.
     * @return ItemJob receiving and containing the data
     */
    ItemJob<BuildServiceJob> *requestBuildServiceJob(const QString &id);

    /**
     * Get a list of build service build services
     * @return ListJob listing BuildServices
     */
    ListJob<BuildService> *requestBuildServices();

    /**
     * Get a list of publishers
     * @return ListJob listing Publishers
     */
    ListJob<Publisher> *requestPublishers();

    /**
     * Get a list of build service projects
     * @return ListJob listing BuildServiceJobs
     */
    ListJob<BuildServiceJob> *requestBuildServiceJobs(const Project &project);

    /**
     * Create a new job for a given project on a given buildservice for a given target.
     * Those three items are mandatory for the job to succeed.
     * @param job Buildservicejob to create on the server
     */
    PostJob *createBuildServiceJob(const BuildServiceJob &job);

    /**
     * Cancel a job.
     * Setting the ID on the build service parameter is enough for it to work.
     * @param job Buildservicejob to cancel on the server, needs at least id set.
     */
    PostJob *cancelBuildServiceJob(const BuildServiceJob &job);

    /**
     * Get a list of remote accounts, account for a build service instance
     * which is stored in the OCS service in order to authenticate with the
     * build service instance.
     * @return ListJob listing RemoteAccounts
     */
    ListJob<RemoteAccount> *requestRemoteAccounts();

    /**
     * Deletes a remote account stored on the OCS server.
     * @param id The ID of the remote account on the OCS instance.
     */
    PostJob *deleteRemoteAccount(const QString &id);

    /**
     * Create a new remote account, an account for a build service instance
     * which is stored in the OCS service in order to authenticate with the
     * build service instance.
     * Type, Type ID, login and password are mandatory.
     * @param account RemoteAccount to create on the server
     */
    PostJob *createRemoteAccount(const RemoteAccount &account);

    /**
     * Edit an existing remote account.
     * @param account RemoteAccount to create on the server
     */
    PostJob *editRemoteAccount(const RemoteAccount &account);

    /** Get a remote account by its ID.
     * @param id The ID of the remote account
     */
    ItemJob<RemoteAccount> *requestRemoteAccount(const QString &id);

    /** Upload a tarball to the buildservice.
     * @param projectId The ID of the project this source file belongs to
     * @param payload A reference to the complete file data
     * @return A postjob to keep keep track of the upload
     */
    Attica::PostJob *uploadTarballToBuildService(const QString &projectId, const QString &fileName, const QByteArray &payload);

    // Content part of OCS

    /**
     * Get a list of categories (such as wallpaper)
     * @return the categories of the server
     */
    ListJob<Category> *requestCategories();

    /**
     * Get a list of licenses (such as GPL)
     * @return the licenses available from the server
     */
    ListJob<License> *requestLicenses();

    /**
     * Get a list of distributions (such as Ark, Debian)
     * @return the licenses available from the server
     */
    ListJob<Distribution> *requestDistributions();

    /**
     * Get a list of home page types (such as blog, Facebook)
     * @return the licenses available from the server
     */
    ListJob<HomePageType> *requestHomePageTypes();

    /**
      Request a list of Contents.
      Note that @p categories is not optional. If left empty, no results will be returned.
      An empty search string @p search returns the top n items.
      @param categories categories to search in
      @param search optional search string (in name/description of the content)
      @param mode sorting mode
      @param page request nth page in the list of results
      @param pageSize requested size of pages when calculating the list of results
      @return list job for the search results
      */
    ListJob<Content> *
    searchContents(const Category::List &categories, const QString &search = QString(), SortMode mode = Rating, uint page = 0, uint pageSize = 10);

    /**
      Request a list of Contents.
      Like @see searchContents, but only contents created by one person.
      @param person the person-id that created the contents.
     */
    ListJob<Content> *searchContentsByPerson(const Category::List &categories,
                                             const QString &person,
                                             const QString &search = QString(),
                                             SortMode mode = Rating,
                                             uint page = 0,
                                             uint pageSize = 10);

    /**
      Request a list of Contents. More complete version.
      Note that @p categories is not optional. If left empty, no results will be returned.
      An empty search string @p search returns the top n items.
      @param categories categories to search in
      @param person the person-id that created the contents
      @param distributions list of distributions to filter by, if empty no filtering by distribution is done
      @param licenses list of licenses to filter by, if empty no filtering by license is done
      @param search optional search string (in name/description of the content)
      @param mode sorting mode
      @param page request nth page in the list of results
      @param pageSize requested size of pages when calculating the list of results
      @return list job for the search results
      */
    ListJob<Content> *searchContents(const Category::List &categories,
                                     const QString &person,
                                     const Distribution::List &distributions,
                                     const License::List &licenses,
                                     const QString &search = QString(),
                                     SortMode sortMode = Rating,
                                     uint page = 0,
                                     uint pageSize = 10);

    /**
      Retrieve a single content.
      @param contentId the id of the content
      @return job that retrieves the content object
     */
    ItemJob<Content> *requestContent(const QString &contentId);

    ItemJob<DownloadItem> *downloadLink(const QString &contentId, const QString &itemId = QStringLiteral("1"));

    /** Vote for a content item
     * @param contentId the content which this voting is for
     * @param rating - the rating, must be between 0 (bad) and 100 (good)
     * @return the post job for this voting
     */
    PostJob *voteForContent(const QString &contentId, uint rating);

    ItemPostJob<Content> *addNewContent(const Category &category, const Content &newContent);
    ItemPostJob<Content> *editContent(const Category &updatedCategory, const QString &contentId, const Content &updatedContent);
    PostJob *deleteContent(const QString &contentId);

    PostJob *setDownloadFile(const QString &contentId, const QString &fileName, QIODevice *payload);
    PostJob *setDownloadFile(const QString &contentId, const QString &fileName, const QByteArray &payload);
    PostJob *deleteDownloadFile(const QString &contentId);

    /**
     * Upload an image file as preview for the content
     * @param contentId
     * @param previewId each content can have previews with the id 1,2 or 3
     * @param payload the image file
     */
    PostJob *setPreviewImage(const QString &contentId, const QString &previewId, const QString &fileName, const QByteArray &image);
    PostJob *deletePreviewImage(const QString &contentId, const QString &previewId);

    // KnowledgeBase part of OCS

    ItemJob<KnowledgeBaseEntry> *requestKnowledgeBaseEntry(const QString &id);
    ListJob<KnowledgeBaseEntry> *searchKnowledgeBase(const Content &content, const QString &search, SortMode, int page, int pageSize);

    // Event part of OCS

    ItemJob<Event> *requestEvent(const QString &id);
    ListJob<Event> *requestEvent(const QString &country, const QString &search, const QDate &startAt, SortMode mode, int page, int pageSize);

    // Comment part of OCS
    /** Request a list of comments for a content / forum / knowledgebase / event.
     * @param comment::Type type of the comment @see Comment::Type (content / forum / knowledgebase / event)
     * @param id id of the content entry where you want to get the comments is from
     * @param id2 id of the content entry where you want to get the comments is from
     * @param page request nth page in the list of results
     * @param pageSize requested size of pages when calculating the list of results
     * @return list job for the comments results
     */
    ListJob<Comment> *requestComments(const Comment::Type commentType, const QString &id, const QString &id2, int page, int pageSize);

    /** Add a new comment.
     * @param commentType type of the comment @see CommentType (content / forum / knowledgebase / event)
     * @param id id of the content entry where you want to get the comments is from
     * @param id2 id of the sub content entry where you want to get the comments is from
     * @param parentId the id of the parent comment if the new comment is a reply
     * @param subject title of the comment
     * @param message text of the comment
     * @return item post job for adding the new comment
     */
    ItemPostJob<Comment> *addNewComment(const Comment::Type commentType,
                                        const QString &id,
                                        const QString &id2,
                                        const QString &parentId,
                                        const QString &subject,
                                        const QString &message);

    /** Vote a comment item
     * @param id the comment id which this voting is for
     * @param rating the rating, must be between 0 (bad) and 100 (good)
     * @return the post job for this voting
     */
    PostJob *voteForComment(const QString &id, uint rating);

    // Fan part of OCS

    PostJob *becomeFan(const QString &contentId);
    ListJob<Person> *requestFans(const QString &contentId, uint page = 0, uint pageSize = 10);

    // Forum part of OCS
    ListJob<Forum> *requestForums(uint page = 0, uint pageSize = 10);
    ListJob<Topic> *requestTopics(const QString &forum, const QString &search, const QString &description, SortMode mode, int page, int pageSize);
    PostJob *postTopic(const QString &forumId, const QString &subject, const QString &content);

    const QString &getRegisterAccountUrl() const;

protected:
    QUrl createUrl(const QString &path);
    QNetworkRequest createRequest(const QUrl &url);
    // Convenience overload
    QNetworkRequest createRequest(const QString &path);

    ItemJob<Config> *doRequestConfig(const QUrl &url);
    ItemJob<Person> *doRequestPerson(const QUrl &url);
    ItemJob<AccountBalance> *doRequestAccountBalance(const QUrl &url);
    ListJob<Person> *doRequestPersonList(const QUrl &url);
    ListJob<Achievement> *doRequestAchievementList(const QUrl &url);
    ListJob<Activity> *doRequestActivityList(const QUrl &url);
    ListJob<Folder> *doRequestFolderList(const QUrl &url);
    ListJob<Forum> *doRequestForumList(const QUrl &url);
    ListJob<Topic> *doRequestTopicList(const QUrl &url);
    ListJob<Message> *doRequestMessageList(const QUrl &url);

private:
    class Private;
    QExplicitlySharedDataPointer<Private> d;

    Provider(PlatformDependent *internals, const QUrl &baseUrl, const QString &name, const QUrl &icon = QUrl());
    Provider(PlatformDependent *internals,
             const QUrl &baseUrl,
             const QString &name,
             const QUrl &icon,
             const QString &person,
             const QString &friendV,
             const QString &message,
             const QString &achievements,
             const QString &activity,
             const QString &content,
             const QString &fan,
             const QString &forum,
             const QString &knowledgebase,
             const QString &event,
             const QString &comment);
    // kde-SC5: merge with the constructor above (i.e. remove the above one)
    Provider(PlatformDependent *internals,
             const QUrl &baseUrl,
             const QString &name,
             const QUrl &icon,
             const QString &person,
             const QString &friendV,
             const QString &message,
             const QString &achievements,
             const QString &activity,
             const QString &content,
             const QString &fan,
             const QString &forum,
             const QString &knowledgebase,
             const QString &event,
             const QString &comment,
             const QString &registerUrl);
    // TODO KF6: merge with the constructor above (i.e. remove the above one - and actually do it this time :P )
    Provider(PlatformDependent *internals,
             const QUrl &baseUrl,
             const QString &name,
             const QUrl &icon,
             const QString &person,
             const QString &friendV,
             const QString &message,
             const QString &achievements,
             const QString &activity,
             const QString &content,
             const QString &fan,
             const QString &forum,
             const QString &knowledgebase,
             const QString &event,
             const QString &comment,
             const QString &registerUrl,
             const QString &additionalAgentInformation);

    friend class ProviderManager;
};
}

#endif