import type { EmittedInterface } from "../core/type-emitter";
import type { ImportTracker } from "../core/import-tracker";
export type MergeStatus = "created" | "updated" | "skipped" | "overwritten";
export interface MergeResult {
    content: string;
    status: MergeStatus;
    /** Number of interfaces added (0 for skipped/overwritten) */
    added: number;
}
/**
 * Decides whether to create, merge, or overwrite a type file.
 */
export declare class FileMerger {
    /**
     * Decides whether to create, merge, or overwrite a type file.
     *
     * - File does not exist → create (write all interfaces)
     * - File exists + `force` → overwrite (write all interfaces, replacing existing)
     * - File exists, not `force` → merge: add only interfaces not already declared
     *
     * Returns the final file content plus a status code.
     */
    resolveFileContent(file: string, interfaces: EmittedInterface[], importTracker: ImportTracker, force: boolean): Promise<MergeResult>;
    /**
     * Parses a named import line of the form:
     *   `import { A, B } from "source"`
     *   `import type { A, B } from "source"`
     *
     * Returns null for default imports, side-effect imports, or anything else.
     */
    private parseImportLine;
    /**
     * Merges two sets of import lines, combining named imports for the same
     * source so we never emit duplicate import statements.
     */
    private mergeImportLines;
    /**
     * Scans `content` for interface and type alias declarations and returns a map
     * from name to the full block text.
     *
     * Matches all four forms so that hand-written declarations are never
     * duplicated by the generator regardless of their export/keyword variant:
     *   - `export interface Foo { ... }`
     *   - `export type Foo = { ... }`
     *   - `interface Foo { ... }`       (non-exported, e.g. internal helpers)
     *   - `type Foo = { ... }`          (non-exported type alias)
     */
    private extractInterfaceBlocks;
    /**
     * Extracts all `import ...` lines from the file content.
     */
    private extractImportLines;
}
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