import { EmitContext, NoTarget } from "@typespec/compiler";
import { TypraEmitterOptions } from "./lib.js";
export declare const SUPPORTED_TYPESPEC_COMPILER_VERSION = ">=1.10.0 <2.0.0";
export declare const SUPPORTED_TYPESPEC_JSON_SCHEMA_VERSION = ">=1.10.0 <2.0.0";
export interface ToolchainPackageMetadata {
    name: string;
    version: string;
    supportedRange: string;
    supported: boolean;
}
export interface ToolchainMetadata {
    packages: ToolchainPackageMetadata[];
}
interface CompatibilityDiagnosticContext {
    options: Pick<TypraEmitterOptions, "allow-unsupported-typespec-version">;
    program: {
        reportDiagnostic(diagnostic: {
            code: string;
            message: string;
            severity: "error" | "warning";
            target: typeof NoTarget;
        }): void;
    };
}
export declare function getToolchainMetadata(): ToolchainMetadata;
export declare function buildToolchainMetadata(packages: Array<Omit<ToolchainPackageMetadata, "supported"> & Partial<Pick<ToolchainPackageMetadata, "supported">>>): ToolchainMetadata;
export declare function reportTypeSpecCompatibility(context: EmitContext<TypraEmitterOptions>): ToolchainMetadata;
export declare function shouldBlockUnsupportedTypeSpecToolchain(options: Pick<TypraEmitterOptions, "allow-unsupported-typespec-version">, toolchain: ToolchainMetadata): boolean;
export declare function reportToolchainCompatibility(context: CompatibilityDiagnosticContext, toolchain: ToolchainMetadata): void;
export declare function getUnsupportedTypeSpecPackages(toolchain: ToolchainMetadata): ToolchainPackageMetadata[];
export declare function formatUnsupportedTypeSpecVersionMessage(unsupported: ToolchainPackageMetadata[], allowedUnsupportedVersion: boolean): string;
export {};