import * as tsm from 'ts-morph';
import {
    DeclarationKinds,
    ModuleDeclarations,
    NamespaceDeclaration,
} from '../types/module-declarations';
import { formatText } from './format';
import { getJSDocs } from './get-jsdocs';
import { SourceProvider } from './source-provider';

export function isNamespace(
    declaration: tsm.Node
): declaration is tsm.ModuleDeclaration {
    return tsm.Node.isModuleDeclaration(declaration);
}

export function newNamespace({
    id,
    name,
    declaration,
    declarations,
    getSource,
}: {
    id: string;
    name: string;
    declaration: tsm.ModuleDeclaration;
    declarations: ModuleDeclarations;
    getSource: SourceProvider;
}): NamespaceDeclaration {
    const kind = DeclarationKinds.NamespaceDeclaration;
    const docs = getJSDocs({ declaration });
    const source = getSource({ declaration });
    const signature = getNamespaceSignature({ id, name });

    return {
        kind,
        id,
        name: id,
        docs,
        source,
        signature,
        declarations,
    };
}

function getNamespaceSignature({
    id,
    name,
}: {
    id: string;
    name: string;
}): string {
    const signature = isAmbientModule({ name })
        ? `module ${name} {}`
        : `namespace ${id} {}`;
    return formatText(signature);
}

function isAmbientModule({ name }: { name: string }): boolean {
    return name.startsWith("'") || name.startsWith('"');
}