/**
 * ProjectManager.ts
 *
 * Project-level management: project files, scene references,
 * asset dependency tracking, and build configuration.
 *
 * @module scene
 */
export interface SceneReference {
    id: string;
    name: string;
    path: string;
    isStartScene: boolean;
    lastModified: number;
}
export interface ProjectAssetRef {
    id: string;
    type: string;
    path: string;
    usedByScenes: string[];
    sizeBytes: number;
}
export interface BuildConfig {
    target: 'development' | 'production' | 'debug';
    optimizeAssets: boolean;
    minifyScripts: boolean;
    bundleAssets: boolean;
    outputDir: string;
}
export interface ProjectFile {
    name: string;
    version: string;
    createdAt: number;
    modifiedAt: number;
    scenes: SceneReference[];
    assets: ProjectAssetRef[];
    buildConfig: BuildConfig;
    settings: Record<string, unknown>;
}
export declare class ProjectManager {
    private project;
    constructor(name: string, version?: string);
    addScene(ref: Omit<SceneReference, 'lastModified'>): void;
    removeScene(sceneId: string): boolean;
    getScene(sceneId: string): SceneReference | undefined;
    getScenes(): SceneReference[];
    getStartScene(): SceneReference | undefined;
    setStartScene(sceneId: string): boolean;
    addAsset(ref: ProjectAssetRef): void;
    removeAsset(assetId: string): boolean;
    getAsset(assetId: string): ProjectAssetRef | undefined;
    getAssets(): ProjectAssetRef[];
    /**
     * Find unused assets (not referenced by any scene).
     */
    findUnusedAssets(): ProjectAssetRef[];
    /**
     * Get total project size in bytes.
     */
    getTotalAssetSize(): number;
    setBuildConfig(config: Partial<BuildConfig>): void;
    getBuildConfig(): BuildConfig;
    setSetting(key: string, value: unknown): void;
    getSetting<T = unknown>(key: string): T | undefined;
    serialize(): string;
    static deserialize(json: string): ProjectManager;
    getProjectFile(): ProjectFile;
}
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