import { Database, QueryResult, RunResult, SQLiteValue } from "node-sqlite3-wasm";
import System from "../System.js";

export interface BookWorldTable extends Record<string, SQLiteValue> {
    world_id: string;
    name: string;
    hashed_name: string;
    author_id: string;
    book_id: string;
    history: string | null;
    politics: string | null;
    economy: string | null;
    religion: string | null;
    languages: string | null;
    last_update: number;
}

export interface BookWorldElementsTable extends Record<string, SQLiteValue> {
    element_id: string;
    world_id: string;
    user_id: string;
    element_type: number;
    name: string;
    original_name: string;
    description: string | null;
    last_update: number;
}

export interface SyncedWorldResult extends Record<string, SQLiteValue> {
    world_id: string;
    book_id: string;
    name: string;
    last_update: number;
}

export interface SyncedWorldElementResult extends Record<string, SQLiteValue> {
    element_id: string;
    world_id: string;
    name: string;
    last_update: number;
}

export interface WorldQuery extends Record<string, SQLiteValue> {
    world_id: string;
    world_name: string;
    history: string | null;
    politics: string | null;
    economy: string | null;
    religion: string | null;
    languages: string | null;
    element_id: string | null;
    element_name: string | null;
    element_description: string | null;
    element_type: number | null;
    series_world_id: string | null;
}

export interface WorldElementValue {
    id: string;
    name: string;
    description: string;
    type: number;
}

export default class WorldRepository {
    /**
     * Checks if a world with the given name exists for a specific user and book.
     * @param userId - The unique identifier of the user
     * @param bookId - The unique identifier of the book
     * @param worldName - The hashed name of the world to check
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the world exists, false otherwise
     */
    public static checkWorldExist(userId: string, bookId: string, worldName: string, lang: 'fr' | 'en'): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT world_id FROM book_world WHERE author_id=? AND book_id=? AND hashed_name=?';
            const params: SQLiteValue[] = [userId, bookId, worldName];
            const world: QueryResult | null = db.get(query, params);
            return world !== null;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de vérifier l'existence du monde.` : `Unable to verify world existence.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Inserts a new world into the database.
     * @param worldId - The unique identifier for the new world
     * @param userId - The unique identifier of the author
     * @param bookId - The unique identifier of the book
     * @param encryptedName - The encrypted name of the world
     * @param hashedName - The hashed name of the world for uniqueness checks
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns The world ID if insertion was successful
     */
    public static insertNewWorld(worldId: string, userId: string, bookId: string, encryptedName: string, hashedName: string, lang: 'fr' | 'en', seriesWorldId: string | null = null): string {
        let insertResult: RunResult;
        try {
            const db: Database = System.getDb();
            const query: string = seriesWorldId
                ? 'INSERT INTO book_world (world_id, author_id, book_id, name, hashed_name, series_world_id, last_update) VALUES (?, ?, ?, ?, ?, ?, ?)'
                : 'INSERT INTO book_world (world_id, author_id, book_id, name, hashed_name, last_update) VALUES (?, ?, ?, ?, ?, ?)';
            const params: SQLiteValue[] = seriesWorldId
                ? [worldId, userId, bookId, encryptedName, hashedName, seriesWorldId, System.timeStampInSeconds()]
                : [worldId, userId, bookId, encryptedName, hashedName, System.timeStampInSeconds()];
            insertResult = db.run(query, params);
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible d'ajouter le monde.` : `Unable to add world.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
        if (!insertResult || insertResult.changes === 0) {
            throw new Error(lang === 'fr' ? `Erreur lors de l'ajout du monde.` : `Error adding world.`);
        }
        return worldId;
    }

    /**
     * Fetches all worlds and their elements for a specific user and book.
     * @param userId - The unique identifier of the user
     * @param bookId - The unique identifier of the book
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns An array of world query results with joined element data
     */
    public static fetchWorlds(userId: string, bookId: string, lang: 'fr' | 'en'): WorldQuery[] {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT world.world_id AS world_id, world.name AS world_name, world.history, world.politics, world.economy, world.religion, world.languages, element.element_id AS element_id, element.name AS element_name, element.description AS element_description, element.element_type, world.series_world_id FROM book_world AS world LEFT JOIN book_world_elements AS element ON world.world_id=element.world_id WHERE world.author_id=? AND world.book_id=?';
            const params: SQLiteValue[] = [userId, bookId];
            const worlds: WorldQuery[] = db.all(query, params) as WorldQuery[];
            return worlds;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de récupérer les mondes.` : `Unable to retrieve worlds.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Updates a world's data in the database.
     * @param userId - The unique identifier of the author
     * @param worldId - The unique identifier of the world to update
     * @param encryptName - The new encrypted name
     * @param hashedName - The new hashed name
     * @param encryptHistory - The new encrypted history
     * @param encryptPolitics - The new encrypted politics
     * @param encryptEconomy - The new encrypted economy
     * @param encryptReligion - The new encrypted religion
     * @param encryptLanguages - The new encrypted languages
     * @param lastUpdate - The timestamp of the last update
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the update was successful, false otherwise
     */
    public static updateWorld(userId: string, worldId: string, encryptName: string, hashedName: string, encryptHistory: string, encryptPolitics: string, encryptEconomy: string, encryptReligion: string, encryptLanguages: string, lastUpdate: number, lang: 'fr' | 'en', seriesWorldId: string | null = null): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = seriesWorldId !== null
                ? 'UPDATE book_world SET name=?, hashed_name=?, history=?, politics=?, economy=?, religion=?, languages=?, last_update=?, series_world_id=? WHERE author_id=? AND world_id=?'
                : 'UPDATE book_world SET name=?, hashed_name=?, history=?, politics=?, economy=?, religion=?, languages=?, last_update=? WHERE author_id=? AND world_id=?';
            const params: SQLiteValue[] = seriesWorldId !== null
                ? [encryptName, hashedName, encryptHistory, encryptPolitics, encryptEconomy, encryptReligion, encryptLanguages, lastUpdate, seriesWorldId, userId, worldId]
                : [encryptName, hashedName, encryptHistory, encryptPolitics, encryptEconomy, encryptReligion, encryptLanguages, lastUpdate, userId, worldId];
            const updateResult: RunResult = db.run(query, params);
            return updateResult.changes > 0;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de mettre à jour le monde.` : `Unable to update world.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Updates multiple world elements in the database.
     * @param userId - The unique identifier of the user
     * @param elements - An array of world element values to update
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if all updates were successful, false otherwise
     */
    public static updateWorldElements(userId: string, elements: WorldElementValue[], lang: 'fr' | 'en'): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = 'UPDATE book_world_elements SET name=?, description=?, element_type=?, last_update=? WHERE user_id=? AND element_id=?';
            for (const element of elements) {
                const params: SQLiteValue[] = [element.name, element.description, element.type, System.timeStampInSeconds(), userId, element.id];
                const updateResult: RunResult = db.run(query, params);
                if (updateResult.changes <= 0) {
                    return false;
                }
            }
            return true;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de mettre à jour les éléments du monde.` : `Unable to update world elements.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Checks if a world element with the given hashed name exists.
     * @param worldNumId - The unique identifier of the world
     * @param hashedName - The hashed name of the element to check
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the element exists, false otherwise
     */
    public static checkElementExist(worldNumId: string, hashedName: string, lang: 'fr' | 'en'): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT element_id FROM book_world_elements WHERE world_id=? AND original_name=?';
            const params: SQLiteValue[] = [worldNumId, hashedName];
            const element: QueryResult | null = db.get(query, params);
            return element !== null;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de vérifier l'existence de l'élément.` : `Unable to verify element existence.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Inserts a new world element into the database.
     * @param userId - The unique identifier of the user
     * @param elementId - The unique identifier for the new element
     * @param elementType - The type of the element
     * @param worldId - The unique identifier of the parent world
     * @param encryptedName - The encrypted name of the element
     * @param hashedName - The hashed name of the element for uniqueness checks
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns The element ID if insertion was successful
     */
    public static insertNewElement(userId: string, elementId: string, elementType: number, worldId: string, encryptedName: string, hashedName: string, lang: 'fr' | 'en'): string {
        let insertResult: RunResult;
        try {
            const db: Database = System.getDb();
            const query: string = 'INSERT INTO book_world_elements (element_id, world_id, user_id, name, original_name, element_type, last_update) VALUES (?, ?, ?, ?, ?, ?, ?)';
            const params: SQLiteValue[] = [elementId, worldId, userId, encryptedName, hashedName, elementType, System.timeStampInSeconds()];
            insertResult = db.run(query, params);
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible d'ajouter l'élément.` : `Unable to add element.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
        if (!insertResult || insertResult.changes === 0) {
            throw new Error(lang === 'fr' ? `Erreur lors de l'ajout de l'élément.` : `Error adding element.`);
        }
        return elementId;
    }

    /**
     * Deletes a world element from the database.
     * @param userId - The unique identifier of the user
     * @param elementId - The unique identifier of the element to delete
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the deletion was successful, false otherwise
     */
    public static deleteElement(userId: string, elementId: string, lang: 'fr' | 'en'): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = 'DELETE FROM book_world_elements WHERE user_id=? AND element_id=?';
            const params: SQLiteValue[] = [userId, elementId];
            const deleteResult: RunResult = db.run(query, params);
            return deleteResult.changes > 0;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de supprimer l'élément.` : `Unable to delete element.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Fetches all worlds for a specific user and book.
     * @param userId - The unique identifier of the user
     * @param bookId - The unique identifier of the book
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns A promise resolving to an array of book world table records
     */
    static async fetchBookWorlds(userId: string, bookId: string, lang: 'fr' | 'en'): Promise<BookWorldTable[]> {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT world_id, name, hashed_name, author_id, book_id, history, politics, economy, religion, languages, last_update FROM book_world WHERE author_id=? AND book_id=?';
            const params: SQLiteValue[] = [userId, bookId];
            const worlds: BookWorldTable[] = db.all(query, params) as BookWorldTable[];
            return worlds;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de récupérer les mondes.` : `Unable to retrieve worlds.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Fetches all elements for a specific world.
     * @param userId - The unique identifier of the user
     * @param worldId - The unique identifier of the world
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns A promise resolving to an array of book world elements table records
     */
    static async fetchBookWorldElements(userId: string, worldId: string, lang: 'fr' | 'en'): Promise<BookWorldElementsTable[]> {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT element_id, world_id, user_id, element_type, name, original_name, description, last_update FROM book_world_elements WHERE user_id=? AND world_id=?';
            const params: SQLiteValue[] = [userId, worldId];
            const elements: BookWorldElementsTable[] = db.all(query, params) as BookWorldElementsTable[];
            return elements;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de récupérer les éléments du monde.` : `Unable to retrieve world elements.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Fetches all synced worlds for a specific user.
     * @param userId - The unique identifier of the user
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns An array of synced world results
     */
    static fetchSyncedWorlds(userId: string, lang: 'fr' | 'en'): SyncedWorldResult[] {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT world_id, book_id, name, last_update FROM book_world WHERE author_id = ?';
            const params: SQLiteValue[] = [userId];
            const syncedWorlds: SyncedWorldResult[] = db.all(query, params) as SyncedWorldResult[];
            return syncedWorlds;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de récupérer les mondes synchronisés.` : `Unable to retrieve synced worlds.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Fetches all synced world elements for a specific user.
     * @param userId - The unique identifier of the user
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns An array of synced world element results
     */
    static fetchSyncedWorldElements(userId: string, lang: 'fr' | 'en'): SyncedWorldElementResult[] {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT element_id, world_id, name, last_update FROM book_world_elements WHERE user_id = ?';
            const params: SQLiteValue[] = [userId];
            const syncedElements: SyncedWorldElementResult[] = db.all(query, params) as SyncedWorldElementResult[];
            return syncedElements;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de récupérer les éléments de monde synchronisés.` : `Unable to retrieve synced world elements.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Inserts a synced world into the database.
     * @param worldId - The unique identifier for the world
     * @param name - The encrypted name of the world
     * @param hashedName - The hashed name of the world
     * @param authorId - The unique identifier of the author
     * @param bookId - The unique identifier of the book
     * @param history - The encrypted history (optional)
     * @param politics - The encrypted politics (optional)
     * @param economy - The encrypted economy (optional)
     * @param religion - The encrypted religion (optional)
     * @param languages - The encrypted languages (optional)
     * @param lastUpdate - The timestamp of the last update
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the insertion was successful, false otherwise
     */
    static insertSyncWorld(worldId: string, name: string, hashedName: string, authorId: string, bookId: string, history: string | null, politics: string | null, economy: string | null, religion: string | null, languages: string | null, lastUpdate: number, lang: 'fr' | 'en'): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = `INSERT INTO book_world (world_id, name, hashed_name, author_id, book_id, history, politics, economy, religion, languages, last_update) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
            const params: SQLiteValue[] = [worldId, name, hashedName, authorId, bookId, history, politics, economy, religion, languages, lastUpdate];
            const insertResult: RunResult = db.run(query, params);
            return insertResult.changes > 0;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible d'insérer le monde.` : `Unable to insert world.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Inserts a synced world element into the database.
     * @param elementId - The unique identifier for the element
     * @param worldId - The unique identifier of the parent world
     * @param userId - The unique identifier of the user
     * @param elementType - The type of the element
     * @param name - The encrypted name of the element
     * @param originalName - The original hashed name
     * @param description - The encrypted description (optional)
     * @param lastUpdate - The timestamp of the last update
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the insertion was successful, false otherwise
     */
    static insertSyncWorldElement(elementId: string, worldId: string, userId: string, elementType: number, name: string, originalName: string, description: string | null, lastUpdate: number, lang: 'fr' | 'en'): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = `INSERT INTO book_world_elements (element_id, world_id, user_id, element_type, name, original_name, description, last_update) VALUES (?, ?, ?, ?, ?, ?, ?, ?)`;
            const params: SQLiteValue[] = [elementId, worldId, userId, elementType, name, originalName, description, lastUpdate];
            const insertResult: RunResult = db.run(query, params);
            return insertResult.changes > 0;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible d'insérer l'élément du monde.` : `Unable to insert world element.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Fetches a complete world by its ID.
     * @param id - The unique identifier of the world
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns A promise resolving to an array of book world table records
     */
    static async fetchCompleteWorldById(id: string, lang: "fr" | "en"): Promise<BookWorldTable[]> {
        try {
            const db: Database = System.getDb();
            const query: string = `SELECT world_id, name, hashed_name, author_id, book_id, history, politics, economy, religion, languages, last_update FROM book_world WHERE world_id = ?`;
            const params: SQLiteValue[] = [id];
            const worlds: BookWorldTable[] = db.all(query, params) as BookWorldTable[];
            return worlds;
        } catch (error: unknown) {
            if (error instanceof Error) {
                throw new Error(lang === 'fr' ? `Impossible de récupérer le monde complet.` : `Unable to retrieve complete world.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Fetches a complete world element by its ID.
     * @param id - The unique identifier of the element
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns A promise resolving to an array of book world elements table records
     */
    static async fetchCompleteWorldElementById(id: string, lang: "fr" | "en"): Promise<BookWorldElementsTable[]> {
        try {
            const db: Database = System.getDb();
            const query: string = `SELECT element_id, world_id, user_id, element_type, name, original_name, description, last_update FROM book_world_elements WHERE element_id = ?`;
            const params: SQLiteValue[] = [id];
            const elements: BookWorldElementsTable[] = db.all(query, params) as BookWorldElementsTable[];
            return elements;
        } catch (error: unknown) {
            if (error instanceof Error) {
                throw new Error(lang === 'fr' ? `Impossible de récupérer l'élément de monde complet.` : `Unable to retrieve complete world element.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Updates a single world element's name and description.
     * @param userId - The unique identifier of the user
     * @param elementId - The unique identifier of the element to update
     * @param name - The new encrypted name
     * @param description - The new encrypted description
     * @param lastUpdate - The timestamp of the last update
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the update was successful, false otherwise
     */
    static updateWorldElement(userId: string, elementId: string, name: string, description: string, lastUpdate: number, lang: "fr" | "en"): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = `UPDATE book_world_elements SET name = ?, description = ?, last_update = ? WHERE element_id = ? AND user_id = ?`;
            const params: SQLiteValue[] = [name, description, lastUpdate, elementId, userId];
            const updateResult: RunResult = db.run(query, params);
            return updateResult.changes > 0;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de mettre à jour l'élément du monde.` : `Unable to update world element.`);
            } else {
                console.error("An unknown error occurred.");
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Checks if a world exists for a specific user and book.
     * @param userId - The unique identifier of the user
     * @param bookId - The unique identifier of the book
     * @param worldId - The unique identifier of the world
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the world exists, false otherwise
     */
    static worldExist(userId: string, bookId: string, worldId: string, lang: "fr" | "en"): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT 1 FROM book_world WHERE world_id=? AND author_id=? AND book_id=?';
            const params: SQLiteValue[] = [worldId, userId, bookId];
            const world: QueryResult | null = db.get(query, params) || null;
            return world !== null;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de vérifier l'existence du monde.` : `Unable to check world existence.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }

    /**
     * Checks if a world element exists for a specific user and world.
     * @param userId - The unique identifier of the user
     * @param worldId - The unique identifier of the world
     * @param elementId - The unique identifier of the element
     * @param lang - The language for error messages ('fr' or 'en')
     * @returns True if the element exists, false otherwise
     */
    static worldElementExist(userId: string, worldId: string, elementId: string, lang: "fr" | "en"): boolean {
        try {
            const db: Database = System.getDb();
            const query: string = 'SELECT 1 FROM book_world_elements WHERE element_id=? AND world_id=? AND user_id=?';
            const params: SQLiteValue[] = [elementId, worldId, userId];
            const element: QueryResult | null = db.get(query, params) || null;
            return element !== null;
        } catch (error: unknown) {
            if (error instanceof Error) {
                console.error(`DB Error: ${error.message}`);
                throw new Error(lang === 'fr' ? `Impossible de vérifier l'existence de l'élément du monde.` : `Unable to check world element existence.`);
            } else {
                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
            }
        }
    }
}