<?php

declare(strict_types=1);

namespace Shimmie2;

class AuthorSetEvent extends Event
{
    public Image $image;
    public User $user;
    public string $author;

    public function __construct(Image $image, User $user, string $author)
    {
        parent::__construct();
        $this->image = $image;
        $this->user = $user;
        $this->author = $author;
    }
}

/**
 * @phpstan-type ArtistArtist array{id:int,artist_id:int,user_name:string,name:string,notes:string,type:string,posts:int}
 * @phpstan-type ArtistAlias array{id:int,alias_id:int,alias_name:string,alias:string}
 * @phpstan-type ArtistMember array{id:int,name:string}
 * @phpstan-type ArtistUrl array{id:int,url:string}
 */
class Artists extends Extension
{
    /** @var ArtistsTheme */
    protected Themelet $theme;

    public function onInitExt(InitExtEvent $event): void
    {
        global $config;
        Image::$prop_types["author"] = ImagePropType::STRING;
        $config->set_default_int("artistsPerPage", 20);
    }

    public function onImageInfoSet(ImageInfoSetEvent $event): void
    {
        global $user;
        $author = $event->get_param("author");
        if ($user->can(Permissions::EDIT_IMAGE_ARTIST) && $author) {
            send_event(new AuthorSetEvent($event->image, $user, $author));
        }
    }

    public function onImageInfoBoxBuilding(ImageInfoBoxBuildingEvent $event): void
    {
        global $user;
        $artistName = $this->get_artistName_by_imageID($event->image->id);
        if (!$user->is_anonymous()) {
            $event->add_part($this->theme->get_author_editor_html($artistName), 42);
        }
    }

    public function onSearchTermParse(SearchTermParseEvent $event): void
    {
        if (is_null($event->term)) {
            return;
        }

        $matches = [];
        if (preg_match("/^(author|artist)[=|:](.*)$/i", $event->term, $matches)) {
            $char = $matches[2];
            $event->add_querylet(new Querylet("author = :author_char", ["author_char" => $char]));
        }
    }

    public function onHelpPageBuilding(HelpPageBuildingEvent $event): void
    {
        if ($event->key === HelpPages::SEARCH) {
            $event->add_block(new Block("Artist", $this->theme->get_help_html()));
        }
    }

    public function onDatabaseUpgrade(DatabaseUpgradeEvent $event): void
    {
        global $config, $database;

        if ($this->get_version("ext_artists_version") < 1) {
            $database->create_table("artists", "
					id SCORE_AIPK,
					user_id INTEGER NOT NULL,
					name VARCHAR(255) NOT NULL,
					created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
					updated TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
					notes TEXT,
					FOREIGN KEY (user_id) REFERENCES users(id) ON UPDATE CASCADE ON DELETE CASCADE
					");

            $database->create_table("artist_members", "
					id SCORE_AIPK,
					artist_id INTEGER NOT NULL,
					user_id INTEGER NOT NULL,
					name VARCHAR(255) NOT NULL,
					created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
					updated TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
					FOREIGN KEY (user_id) REFERENCES users(id) ON UPDATE CASCADE ON DELETE CASCADE,
					FOREIGN KEY (artist_id) REFERENCES artists (id) ON UPDATE CASCADE ON DELETE CASCADE
					");
            $database->create_table("artist_alias", "
					id SCORE_AIPK,
					artist_id INTEGER NOT NULL,
					user_id INTEGER NOT NULL,
					created TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
					updated TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
					alias VARCHAR(255),
					FOREIGN KEY (user_id) REFERENCES users(id) ON UPDATE CASCADE ON DELETE CASCADE,
					FOREIGN KEY (artist_id) REFERENCES artists (id) ON UPDATE CASCADE ON DELETE CASCADE
					");
            $database->create_table("artist_urls", "
					id SCORE_AIPK,
					artist_id INTEGER NOT NULL,
					user_id INTEGER NOT NULL,
					created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
					updated TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
					url VARCHAR(1000) NOT NULL,
					FOREIGN KEY (user_id) REFERENCES users(id) ON UPDATE CASCADE ON DELETE CASCADE,
					FOREIGN KEY (artist_id) REFERENCES artists (id) ON UPDATE CASCADE ON DELETE CASCADE
					");
            $database->execute("ALTER TABLE images ADD COLUMN author VARCHAR(255) NULL");

            $this->set_version("ext_artists_version", 1);
        }
    }

    public function onAuthorSet(AuthorSetEvent $event): void
    {
        global $database;

        $author = strtolower($event->author);
        if (strlen($author) === 0 || strpos($author, " ")) {
            return;
        }

        $paddedAuthor = str_replace(" ", "_", $author);

        $artistID = null;
        if ($this->artist_exists($author)) {
            $artistID = $this->get_artist_id($author);
        }

        if (is_null($artistID) && $this->alias_exists_by_name($paddedAuthor)) {
            $artistID = $this->get_artistID_by_aliasName($paddedAuthor);
        }

        if (is_null($artistID) && $this->member_exists_by_name($paddedAuthor)) {
            $artistID = $this->get_artistID_by_memberName($paddedAuthor);
        }

        if (is_null($artistID) && $this->url_exists_by_url($author)) {
            $artistID = $this->get_artistID_by_url($author);
        }

        if (!is_null($artistID)) {
            $artistName = $this->get_artistName_by_artistID($artistID);
        } else {
            $this->save_new_artist($author, "");
            $artistName = $author;
        }

        $database->execute(
            "UPDATE images SET author = :author WHERE id = :id",
            ['author' => $artistName, 'id' => $event->image->id]
        );
    }

    public function onPageRequest(PageRequestEvent $event): void
    {
        global $page, $user;

        if ($event->page_matches("artist/list/{page}")) {
            $this->get_listing(page_number($event->get_arg('page')));
            $this->theme->sidebar_options("neutral");
        }
        if ($event->page_matches("artist/new")) {
            if (!$user->is_anonymous()) {
                $this->theme->new_artist_composer();
            } else {
                $this->theme->display_error(401, "Error", "You must be registered and logged in to create a new artist.");
            }
        }
        if ($event->page_matches("artist/new_artist")) {
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/new"));
        }
        if ($event->page_matches("artist/create")) {
            if (!$user->is_anonymous()) {
                $newArtistID = $this->add_artist();
                if ($newArtistID == -1) {
                    $this->theme->display_error(400, "Error", "Error when entering artist data.");
                } else {
                    $page->set_mode(PageMode::REDIRECT);
                    $page->set_redirect(make_link("artist/view/" . $newArtistID));
                }
            } else {
                $this->theme->display_error(401, "Error", "You must be registered and logged in to create a new artist.");
            }
        }
        if ($event->page_matches("artist/view/{artistID}")) {
            $artistID = $event->get_iarg('artistID');
            $artist = $this->get_artist($artistID);
            $aliases = $this->get_alias($artist['id']);
            $members = $this->get_members($artist['id']);
            $urls = $this->get_urls($artist['id']);

            $userIsLogged = !$user->is_anonymous();
            $userIsAdmin = $user->can(Permissions::ARTISTS_ADMIN);

            $images = Search::find_images(limit: 4, tags: Tag::explode($artist['name']));

            $this->theme->show_artist($artist, $aliases, $members, $urls, $images, $userIsLogged, $userIsAdmin);
            /*
            if ($userIsLogged) {
                $this->theme->show_new_alias_composer($artistID);
                $this->theme->show_new_member_composer($artistID);
                $this->theme->show_new_url_composer($artistID);
            }
            */

            $this->theme->sidebar_options("editor", $artistID, $userIsAdmin);
        }
        if ($event->page_matches("artist/edit/{artistID}")) {
            $artistID = $event->get_iarg('artistID');
            $artist = $this->get_artist($artistID);
            $aliases = $this->get_alias($artistID);
            $members = $this->get_members($artistID);
            $urls = $this->get_urls($artistID);

            if (!$user->is_anonymous()) {
                $this->theme->show_artist_editor($artist, $aliases, $members, $urls);

                $userIsAdmin = $user->can(Permissions::ARTISTS_ADMIN);
                $this->theme->sidebar_options("editor", $artistID, $userIsAdmin);
            } else {
                $this->theme->display_error(401, "Error", "You must be registered and logged in to edit an artist.");
            }
        }
        if ($event->page_matches("artist/edit_artist")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/edit/" . $artistID));
        }
        if ($event->page_matches("artist/edited")) {
            $artistID = int_escape($event->get_POST('id'));
            $this->update_artist();
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/nuke_artist")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/nuke/" . $artistID));
        }
        if ($event->page_matches("artist/nuke/{artistID}")) {
            $artistID = $event->get_iarg('artistID');
            $this->delete_artist($artistID); // this will delete the artist, its alias, its urls and its members
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/list"));
        }
        if ($event->page_matches("artist/add_alias")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $this->theme->show_new_alias_composer($artistID);
        }
        if ($event->page_matches("artist/add_member")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $this->theme->show_new_member_composer($artistID);
        }
        if ($event->page_matches("artist/add_url")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $this->theme->show_new_url_composer($artistID);
        }
        if ($event->page_matches("artist/alias/add")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $this->add_alias();
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/alias/delete/{aliasID}")) {
            $aliasID = $event->get_iarg('aliasID');
            $artistID = $this->get_artistID_by_aliasID($aliasID);
            $this->delete_alias($aliasID);
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/alias/edit/{aliasID}")) {
            $aliasID = $event->get_iarg('aliasID');
            $alias = $this->get_alias_by_id($aliasID);
            $this->theme->show_alias_editor($alias);
        }
        if ($event->page_matches("artist/alias/edited")) {
            $this->update_alias();
            $aliasID = int_escape($event->req_POST('aliasID'));
            $artistID = $this->get_artistID_by_aliasID($aliasID);
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/url/add")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $this->add_urls();
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/url/delete/{urlID}")) {
            $urlID = $event->get_iarg('urlID');
            $artistID = $this->get_artistID_by_urlID($urlID);
            $this->delete_url($urlID);
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/url/edit/{urlID}")) {
            $urlID = $event->get_iarg('urlID');
            $url = $this->get_url_by_id($urlID);
            $this->theme->show_url_editor($url);
        }
        if ($event->page_matches("artist/url/edited")) {
            $this->update_url();
            $urlID = int_escape($event->req_POST('urlID'));
            $artistID = $this->get_artistID_by_urlID($urlID);
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/member/add")) {
            $artistID = int_escape($event->req_POST('artist_id'));
            $this->add_members();
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/member/delete/{memberID}")) {
            $memberID = $event->get_iarg('memberID');
            $artistID = $this->get_artistID_by_memberID($memberID);
            $this->delete_member($memberID);
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
        if ($event->page_matches("artist/member/edit/{memberID}")) {
            $memberID = $event->get_iarg('memberID');
            $member = $this->get_member_by_id($memberID);
            $this->theme->show_member_editor($member);
        }
        if ($event->page_matches("artist/member/edited")) {
            $this->update_member();
            $memberID = int_escape($event->req_POST('memberID'));
            $artistID = $this->get_artistID_by_memberID($memberID);
            $page->set_mode(PageMode::REDIRECT);
            $page->set_redirect(make_link("artist/view/" . $artistID));
        }
    }

    private function get_artistName_by_imageID(int $imageID): string
    {
        global $database;
        $result = $database->get_row("SELECT author FROM images WHERE id = :id", ['id' => $imageID]);
        return $result['author'] ?? "";
    }

    private function url_exists_by_url(string $url): bool
    {
        global $database;
        $result = $database->get_one("SELECT COUNT(1) FROM artist_urls WHERE url = :url", ['url' => $url]);
        return ($result != 0);
    }

    private function member_exists_by_name(string $member): bool
    {
        global $database;
        $result = $database->get_one("SELECT COUNT(1) FROM artist_members WHERE name = :name", ['name' => $member]);
        return ($result != 0);
    }

    private function alias_exists_by_name(string $alias): bool
    {
        global $database;
        $result = $database->get_one("SELECT COUNT(1) FROM artist_alias WHERE alias = :alias", ['alias' => $alias]);
        return ($result != 0);
    }

    private function alias_exists(int $artistID, string $alias): bool
    {
        global $database;
        $result = $database->get_one(
            "SELECT COUNT(1) FROM artist_alias WHERE artist_id = :artist_id AND alias = :alias",
            ['artist_id' => $artistID, 'alias' => $alias]
        );
        return ($result != 0);
    }

    private function get_artistID_by_url(string $url): int
    {
        global $database;
        return (int) $database->get_one("SELECT artist_id FROM artist_urls WHERE url = :url", ['url' => $url]);
    }

    private function get_artistID_by_memberName(string $member): int
    {
        global $database;
        return (int) $database->get_one("SELECT artist_id FROM artist_members WHERE name = :name", ['name' => $member]);
    }

    private function get_artistName_by_artistID(int $artistID): string
    {
        global $database;
        return (string) $database->get_one("SELECT name FROM artists WHERE id = :id", ['id' => $artistID]);
    }

    private function get_artistID_by_aliasID(int $aliasID): int
    {
        global $database;
        return (int) $database->get_one("SELECT artist_id FROM artist_alias WHERE id = :id", ['id' => $aliasID]);
    }

    private function get_artistID_by_memberID(int $memberID): int
    {
        global $database;
        return (int) $database->get_one("SELECT artist_id FROM artist_members WHERE id = :id", ['id' => $memberID]);
    }

    private function get_artistID_by_urlID(int $urlID): int
    {
        global $database;
        return (int) $database->get_one("SELECT artist_id FROM artist_urls WHERE id = :id", ['id' => $urlID]);
    }

    private function delete_alias(int $aliasID): void
    {
        global $database;
        $database->execute("DELETE FROM artist_alias WHERE id = :id", ['id' => $aliasID]);
    }

    private function delete_url(int $urlID): void
    {
        global $database;
        $database->execute("DELETE FROM artist_urls WHERE id = :id", ['id' => $urlID]);
    }

    private function delete_member(int $memberID): void
    {
        global $database;
        $database->execute("DELETE FROM artist_members WHERE id = :id", ['id' => $memberID]);
    }

    /**
     * @return ArtistAlias
     */
    private function get_alias_by_id(int $aliasID): array
    {
        global $database;
        return $database->get_row("SELECT * FROM artist_alias WHERE id = :id", ['id' => $aliasID]);
    }

    /**
     * @return ArtistUrl
     */
    private function get_url_by_id(int $urlID): array
    {
        global $database;
        return $database->get_row("SELECT * FROM artist_urls WHERE id = :id", ['id' => $urlID]);
    }

    /**
     * @return ArtistMember
     */
    private function get_member_by_id(int $memberID): array
    {
        global $database;
        return $database->get_row("SELECT * FROM artist_members WHERE id = :id", ['id' => $memberID]);
    }

    private function update_artist(): void
    {
        global $user;
        $inputs = validate_input([
            'id' => 'int',
            'name' => 'string,lower',
            'notes' => 'string,trim,nullify',
            'aliases' => 'string,trim,nullify',
            'aliasesIDs' => 'string,trim,nullify',
            'members' => 'string,trim,nullify',
        ]);
        $artistID = $inputs['id'];
        $name = $inputs['name'];
        $notes = $inputs['notes'];
        $userID = $user->id;

        $aliasesAsString = $inputs["aliases"];
        $aliasesIDsAsString = $inputs["aliasesIDs"];

        $membersAsString = $inputs["members"];
        $membersIDsAsString = $inputs["membersIDs"];

        $urlsAsString = $inputs["urls"];
        $urlsIDsAsString = $inputs["urlsIDs"];

        if (str_contains($name, " ")) {
            return;
        }

        global $database;
        $database->execute(
            "UPDATE artists SET name = :name, notes = :notes, updated = now(), user_id = :user_id WHERE id = :id",
            ['name' => $name, 'notes' => $notes, 'user_id' => $userID, 'id' => $artistID]
        );

        // ALIAS MATCHING SECTION
        $i = 0;
        $aliasesAsArray = is_null($aliasesAsString) ? [] : explode(" ", $aliasesAsString);
        $aliasesIDsAsArray = is_null($aliasesIDsAsString) ? [] : array_map(fn ($n) => int_escape($n), explode(" ", $aliasesIDsAsString));
        while ($i < count($aliasesAsArray)) {
            // if an alias was updated
            if ($i < count($aliasesIDsAsArray)) {
                $this->save_existing_alias($aliasesIDsAsArray[$i], $aliasesAsArray[$i], $userID);
            } else {
                // if we already updated all, save new ones
                $this->save_new_alias($artistID, $aliasesAsArray[$i], $userID);
            }

            $i++;
        }
        // if we have more ids than alias, then some alias have been deleted -- delete them from db
        while ($i < count($aliasesIDsAsArray)) {
            $this->delete_alias($aliasesIDsAsArray[$i++]);
        }

        // MEMBERS MATCHING SECTION
        $i = 0;
        $membersAsArray = is_null($membersAsString) ? [] : explode(" ", $membersAsString);
        $membersIDsAsArray = is_null($membersIDsAsString) ? [] : array_map(fn ($n) => int_escape($n), explode(" ", $membersIDsAsString));
        while ($i < count($membersAsArray)) {
            // if a member was updated
            if ($i < count($membersIDsAsArray)) {
                $this->save_existing_member($membersIDsAsArray[$i], $membersAsArray[$i], $userID);
            } else {
                // if we already updated all, save new ones
                $this->save_new_member($artistID, $membersAsArray[$i], $userID);
            }

            $i++;
        }
        // if we have more ids than members, then some members have been deleted -- delete them from db
        while ($i < count($membersIDsAsArray)) {
            $this->delete_member($membersIDsAsArray[$i++]);
        }

        // URLS MATCHING SECTION
        $i = 0;
        assert(is_string($urlsAsString));
        $urlsAsString = str_replace("\r\n", "\n", $urlsAsString);
        $urlsAsString = str_replace("\n\r", "\n", $urlsAsString);
        $urlsAsArray = empty($urlsAsString) ? [] : explode("\n", $urlsAsString);
        $urlsIDsAsArray = is_null($urlsIDsAsString) ? [] : array_map(fn ($n) => int_escape($n), explode(" ", $urlsIDsAsString));
        while ($i < count($urlsAsArray)) {
            // if an URL was updated
            if ($i < count($urlsIDsAsArray)) {
                $this->save_existing_url($urlsIDsAsArray[$i], $urlsAsArray[$i], $userID);
            } else {
                $this->save_new_url($artistID, $urlsAsArray[$i], $userID);
            }

            $i++;
        }

        // if we have more ids than urls, then some urls have been deleted -- delete them from db
        while ($i < count($urlsIDsAsArray)) {
            $this->delete_url($urlsIDsAsArray[$i++]);
        }
    }

    private function update_alias(): void
    {
        global $user;
        $inputs = validate_input([
            "aliasID" => "int",
            "alias" => "string,lower",
        ]);
        $this->save_existing_alias($inputs['aliasID'], $inputs['alias'], $user->id);
    }

    private function save_existing_alias(int $aliasID, string $alias, int $userID): void
    {
        global $database;
        $database->execute(
            "UPDATE artist_alias SET alias = :alias, updated = now(), user_id = :user_id WHERE id = :id",
            ['alias' => $alias, 'user_id' => $userID, 'id' => $aliasID]
        );
    }

    private function update_url(): void
    {
        global $user;
        $inputs = validate_input([
            "urlID" => "int",
            "url" => "string",
        ]);
        $this->save_existing_url($inputs['urlID'], $inputs['url'], $user->id);
    }

    private function save_existing_url(int $urlID, string $url, int $userID): void
    {
        global $database;
        $database->execute(
            "UPDATE artist_urls SET url = :url, updated = now(), user_id = :user_id WHERE id = :id",
            ['url' => $url, 'user_id' => $userID, 'id' => $urlID]
        );
    }

    private function update_member(): void
    {
        global $user;
        $inputs = validate_input([
            "memberID" => "int",
            "name" => "string,lower",
        ]);
        $this->save_existing_member($inputs['memberID'], $inputs['name'], $user->id);
    }

    private function save_existing_member(int $memberID, string $memberName, int $userID): void
    {
        global $database;
        $database->execute(
            "UPDATE artist_members SET name = :name, updated = now(), user_id = :user_id WHERE id = :id",
            ['name' => $memberName, 'user_id' => $userID, 'id' => $memberID]
        );
    }

    private function add_artist(): int
    {
        global $user;
        $inputs = validate_input([
            "name" => "string,lower",
            "notes" => "string,optional",
            "aliases" => "string,lower,optional",
            "members" => "string,lower,optional",
            "urls" => "string,optional"
        ]);

        $name = $inputs["name"];
        if (str_contains($name, " ")) {
            return -1;
        }

        $notes = $inputs["notes"];

        $aliases = $inputs["aliases"];
        $members = $inputs["members"];
        $urls = $inputs["urls"];
        $userID = $user->id;

        //$artistID = "";

        //// WE CHECK IF THE ARTIST ALREADY EXISTS ON DATABASE; IF NOT WE CREATE
        if (!$this->artist_exists($name)) {
            $artistID = $this->save_new_artist($name, $notes);
            log_info("artists", "Artist {$artistID} created by {$user->name}");
        } else {
            $artistID = $this->get_artist_id($name);
        }

        if (!is_null($aliases)) {
            $aliasArray = explode(" ", $aliases);
            foreach ($aliasArray as $alias) {
                if (!$this->alias_exists($artistID, $alias)) {
                    $this->save_new_alias($artistID, $alias, $userID);
                }
            }
        }

        if (!is_null($members)) {
            $membersArray = explode(" ", $members);
            foreach ($membersArray as $member) {
                if (!$this->member_exists($artistID, $member)) {
                    $this->save_new_member($artistID, $member, $userID);
                }
            }
        }

        if (!is_null($urls)) {
            assert(is_string($urls));
            //delete double "separators"
            $urls = str_replace("\r\n", "\n", $urls);
            $urls = str_replace("\n\r", "\n", $urls);

            $urlsArray = explode("\n", $urls);
            foreach ($urlsArray as $url) {
                if (!$this->url_exists($artistID, $url)) {
                    $this->save_new_url($artistID, $url, $userID);
                }
            }
        }
        return $artistID;
    }

    private function save_new_artist(string $name, string $notes): int
    {
        global $database, $user;
        $database->execute("
            INSERT INTO artists (user_id, name, notes, created, updated)
            VALUES (:user_id, :name, :notes, now(), now())
        ", ['user_id' => $user->id, 'name' => $name, 'notes' => $notes]);
        return $database->get_last_insert_id('artists_id_seq');
    }

    private function artist_exists(string $name): bool
    {
        global $database;
        $result = $database->get_one(
            "SELECT COUNT(1) FROM artists WHERE name = :name",
            ['name' => $name]
        );
        return ($result != 0);
    }

    /**
     * @return ArtistArtist
     */
    private function get_artist(int $artistID): array
    {
        global $database;
        $result = $database->get_row(
            "SELECT * FROM artists WHERE id = :id",
            ['id' => $artistID]
        );

        $result["name"] = stripslashes($result["name"]);
        $result["notes"] = stripslashes($result["notes"]);

        return $result;
    }

    /**
     * @return ArtistMember[]
     */
    private function get_members(int $artistID): array
    {
        global $database;
        $result = $database->get_all(
            "SELECT * FROM artist_members WHERE artist_id = :artist_id",
            ['artist_id' => $artistID]
        );

        $num = count($result);
        for ($i = 0; $i < $num; $i++) {
            $result[$i]["name"] = stripslashes($result[$i]["name"]);
        }

        return $result;
    }

    /**
     * @return ArtistUrl[]
     */
    private function get_urls(int $artistID): array
    {
        global $database;
        $result = $database->get_all(
            "SELECT id, url FROM artist_urls WHERE artist_id = :artist_id",
            ['artist_id' => $artistID]
        );

        $num = count($result);
        for ($i = 0; $i < $num; $i++) {
            $result[$i]["url"] = stripslashes($result[$i]["url"]);
        }

        return $result;
    }

    private function get_artist_id(string $name): int
    {
        global $database;
        return (int) $database->get_one(
            "SELECT id FROM artists WHERE name = :name",
            ['name' => $name]
        );
    }

    private function get_artistID_by_aliasName(string $alias): int
    {
        global $database;

        return (int) $database->get_one(
            "SELECT artist_id FROM artist_alias WHERE alias = :alias",
            ['alias' => $alias]
        );
    }

    private function delete_artist(int $artistID): void
    {
        global $database;
        $database->execute(
            "DELETE FROM artists WHERE id = :id",
            ['id' => $artistID]
        );
    }

    /*
     * HERE WE GET THE LIST OF ALL ARTIST WITH PAGINATION
     */
    private function get_listing(int $pageNumber): void
    {
        global $config, $database;

        $artistsPerPage = $config->get_int("artistsPerPage");

        $listing = $database->get_all(
            "
                (
                    SELECT a.id, a.user_id, a.name, u.name AS user_name, COALESCE(t.count, 0) AS posts
                        , 'artist' as type, a.id AS artist_id, a.name AS artist_name, a.updated
                    FROM artists AS a
                        INNER JOIN users AS u
                            ON a.user_id = u.id
                        LEFT OUTER JOIN tags AS t
                            ON a.name = t.tag
                    GROUP BY a.id, a.user_id, a.name, u.name
                    ORDER BY a.updated DESC
                )

                UNION

                (
                    SELECT aa.id, aa.user_id, aa.alias AS name, u.name AS user_name, COALESCE(t.count, 0) AS posts
                        , 'alias' as type, a.id AS artist_id, a.name AS artist_name, aa.updated
                    FROM artist_alias AS aa
                        INNER JOIN users AS u
                            ON aa.user_id = u.id
                        INNER JOIN artists AS a
                            ON aa.artist_id = a.id
                        LEFT OUTER JOIN tags AS t
                            ON aa.alias = t.tag
                    GROUP BY aa.id, a.user_id, aa.alias, u.name, a.id, a.name
                    ORDER BY aa.updated DESC
                )

                UNION

                (
                    SELECT m.id, m.user_id, m.name AS name, u.name AS user_name, COALESCE(t.count, 0) AS posts
                        , 'member' AS type, a.id AS artist_id, a.name AS artist_name, m.updated
                    FROM artist_members AS m
                        INNER JOIN users AS u
                            ON m.user_id = u.id
                        INNER JOIN artists AS a
                            ON m.artist_id = a.id
                        LEFT OUTER JOIN tags AS t
                            ON m.name = t.tag
                    GROUP BY m.id, m.user_id, m.name, u.name, a.id, a.name
                    ORDER BY m.updated DESC
                )
                ORDER BY updated DESC
                LIMIT :offset, :limit
            ",
            [
                "offset" => $pageNumber * $artistsPerPage,
                "limit" => $artistsPerPage
            ]
        );

        $number_of_listings = count($listing);

        for ($i = 0; $i < $number_of_listings; $i++) {
            $listing[$i]["name"] = stripslashes($listing[$i]["name"]);
            $listing[$i]["user_name"] = stripslashes($listing[$i]["user_name"]);
            $listing[$i]["artist_name"] = stripslashes($listing[$i]["artist_name"]);
        }

        $count = $database->get_one("
                SELECT COUNT(1)
                FROM artists AS a
                    LEFT OUTER JOIN artist_members AS am
                        ON a.id = am.artist_id
                    LEFT OUTER JOIN artist_alias AS aa
                        ON a.id = aa.artist_id
            ");

        $totalPages = (int) ceil($count / $artistsPerPage);

        $this->theme->list_artists($listing, $pageNumber + 1, $totalPages);
    }

    /*
     * HERE WE ADD AN ALIAS
     */
    private function add_urls(): void
    {
        global $user;
        $inputs = validate_input([
            "artistID" => "int",
            "urls" => "string",
        ]);
        $artistID = $inputs["artistID"];
        $urls = explode("\n", $inputs["urls"]);

        foreach ($urls as $url) {
            if (!$this->url_exists($artistID, $url)) {
                $this->save_new_url($artistID, $url, $user->id);
            }
        }
    }

    private function save_new_url(int $artistID, string $url, int $userID): void
    {
        global $database;

        $database->execute(
            "INSERT INTO artist_urls (artist_id, created, updated, url, user_id) VALUES (:artist_id, now(), now(), :url, :user_id)",
            ['artist' => $artistID, 'url' => $url, 'user_id' => $userID]
        );
    }

    private function add_alias(): void
    {
        global $user;
        $inputs = validate_input([
            "artistID" => "int",
            "aliases" => "string,lower",
        ]);
        $artistID = $inputs["artistID"];
        $aliases = explode(" ", $inputs["aliases"]);

        foreach ($aliases as $alias) {
            if (!$this->alias_exists($artistID, $alias)) {
                $this->save_new_alias($artistID, $alias, $user->id);
            }
        }
    }

    private function save_new_alias(int $artistID, string $alias, int $userID): void
    {
        global $database;

        $database->execute(
            "INSERT INTO artist_alias (artist_id, created, updated, alias, user_id) VALUES (:artist_id, now(), now(), :alias, :user_id)",
            ['artist_id' => $artistID, 'alias' => $alias, 'user_id' => $userID]
        );
    }

    private function add_members(): void
    {
        global $user;
        $inputs = validate_input([
            "artistID" => "int",
            "members" => "string,lower",
        ]);
        $artistID = $inputs["artistID"];
        $members = explode(" ", $inputs["members"]);

        foreach ($members as $member) {
            if (!$this->member_exists($artistID, $member)) {
                $this->save_new_member($artistID, $member, $user->id);
            }
        }
    }

    private function save_new_member(int $artistID, string $member, int $userID): void
    {
        global $database;

        $database->execute(
            "INSERT INTO artist_members (artist_id, name, created, updated, user_id) VALUES (:artist_id, :name, now(), now(), :user_id)",
            ['artist' => $artistID, 'name' => $member, 'user_id' => $userID]
        );
    }

    private function member_exists(int $artistID, string $member): bool
    {
        global $database;

        $result = $database->get_one(
            "SELECT COUNT(1) FROM artist_members WHERE artist_id = :artist_id AND name = :name",
            ['artist_id' => $artistID, 'name' => $member]
        );
        return ($result != 0);
    }

    private function url_exists(int $artistID, string $url): bool
    {
        global $database;

        $result = $database->get_one(
            "SELECT COUNT(1) FROM artist_urls WHERE artist_id = :artist_id AND url = :url",
            ['artist_id' => $artistID, 'url' => $url]
        );
        return ($result != 0);
    }

    /**
     * HERE WE GET THE INFO OF THE ALIAS
     *
     * @return array<string, mixed>
     */
    private function get_alias(int $artistID): array
    {
        global $database;

        $result = $database->get_all("
            SELECT id AS alias_id, alias AS alias_name
            FROM artist_alias
            WHERE artist_id = :artist_id
            ORDER BY alias ASC
        ", ['artist_id' => $artistID]);

        $rc = count($result);
        for ($i = 0; $i < $rc; $i++) {
            $result[$i]["alias_name"] = stripslashes($result[$i]["alias_name"]);
        }
        return $result;
    }
}