import type { SemVer } from 'semver';
import type { InvalidationEvent, InvalidationEventReceiver } from '../cache/flowr-cache';
import type { RAuthorInfo } from '../../util/r-author';
import type { RLicenseElementInfo } from '../../util/r-license';
import type { Package } from '../plugins/package-version-plugins/package';
/**
 * How much a {@link ProjectMetaFields | contribution} is trusted, in case several sources disagree.
 * A higher value wins; among equal values the first contribution stays.
 */
export declare enum MetaPriority {
    /** derived from a lockfile, e.g. the `r_version` of an `rv.lock` */
    Lockfile = 0,
    /** declared in a project manifest, e.g. an `rproject.toml` */
    Manifest = 1,
    /** declared in a `DESCRIPTION` file, which identifies an actual R package */
    Description = 2
}
/**
 * The packages a project declares, grouped as a `DESCRIPTION` groups them. A source without such groups
 * (an `rproject.toml` just lists `dependencies`) reports them as {@link DeclaredPackages#imports}.
 */
export interface DeclaredPackages {
    imports?: readonly Package[];
    depends?: readonly Package[];
    suggests?: readonly Package[];
    linkingTo?: readonly Package[];
    enhances?: readonly Package[];
}
/** The project metadata a plugin may contribute, see {@link FlowrAnalyzerMetaContext#contribute}. */
export interface ProjectMetaFields {
    /** the project name, e.g. the `Package` of a `DESCRIPTION` or the `[project] name` of an `rproject.toml` */
    name?: string;
    /** the human-readable project title */
    title?: string;
    /** the project version */
    version?: SemVer & {
        str: string;
    };
    /** the R version the project targets, e.g. the `r_version` of an `rproject.toml` */
    rVersion?: string;
    /**
     * The namespace `a::b` resolves against. Only set this for a real R package: a plain project
     * (e.g. an rv project) has a name but no namespace, and claiming one changes symbol resolution.
     */
    namespace?: string;
    /** the project authors */
    authors?: RAuthorInfo[];
    /** the encoding the project's files are written in */
    encoding?: string;
    /** the project licenses */
    licenses?: RLicenseElementInfo[];
    /** the packages the project declares, used to report on them; what is loadable lives in the dependency context */
    declares?: DeclaredPackages;
}
export interface ReadOnlyFlowrAnalyzerMetaContext {
    /**
     * The name of this context.
     */
    readonly name: string;
    /**
     * Get the project name.
     */
    getProjectName(): string | undefined;
    /**
     * Get the project title.
     */
    getProjectTitle(): string | undefined;
    /**
     * Get the project version.
     */
    getProjectVersion(): SemVer & {
        str: string;
    } | undefined;
    /**
     * Get the R version the project targets, if any source declares one.
     */
    getRVersion(): string | undefined;
    /**
     * Get the project namespace.
     * Any symbol resolve like `a::b` will resolve against this, if `a` matches the namespace.
     */
    getNamespace(): string | undefined;
    /**
     * Get the project authors.
     */
    getAuthors(): RAuthorInfo[] | undefined;
    /**
     * Get the encoding the project's files are written in.
     */
    getEncoding(): string | undefined;
    /**
     * Get the project licenses.
     */
    getLicenses(): RLicenseElementInfo[] | undefined;
    /**
     * Get the packages the project declares, grouped by how they are declared.
     */
    getDeclaredPackages(): DeclaredPackages;
}
/**
 * This is the context responsible for managing the project metadata such as name, version, title, and namespace.
 *
 * The metadata is source-agnostic: plugins {@link FlowrAnalyzerMetaContext#contribute | contribute} whatever their
 * file declares (`DESCRIPTION`, `rproject.toml`, a lockfile, ...) and consumers read it from here rather than from
 * any particular file. Conflicts are settled by {@link MetaPriority}, so contributions are order-independent.
 *
 * If you are interested in inspecting this metadata, refer to {@link ReadOnlyFlowrAnalyzerMetaContext}.
 */
export declare class FlowrAnalyzerMetaContext implements ReadOnlyFlowrAnalyzerMetaContext, InvalidationEventReceiver {
    readonly name = "flowr-analyzer-meta-context";
    private readonly fields;
    /** runs the plugins that contribute the metadata, as they only do so on demand */
    private readonly ensureContributed;
    constructor(ensureContributed?: () => void);
    reset(): void;
    receive(event: InvalidationEvent): void;
    /**
     * Contribute what a source declares about the project; `undefined` fields are ignored, so a plugin can pass
     * whatever it happens to know.
     * @param fields   - the metadata to contribute
     * @param priority - how much to trust these fields against other sources
     */
    contribute(fields: ProjectMetaFields, priority: MetaPriority): this;
    private get;
    getProjectName(): string | undefined;
    getProjectTitle(): string | undefined;
    getProjectVersion(): SemVer & {
        str: string;
    } | undefined;
    getRVersion(): string | undefined;
    getNamespace(): string | undefined;
    getAuthors(): RAuthorInfo[] | undefined;
    getEncoding(): string | undefined;
    getLicenses(): RLicenseElementInfo[] | undefined;
    getDeclaredPackages(): DeclaredPackages;
}