import * as path from "path";
import * as fs from "fs";
import {
    CompletionItem,
    TextDocumentPositionParams
} from "vscode-languageserver/lib/main";
import Completer from "../interfaces/Completer";

export default class Completers {
    public completers: Completer[];

    public init(): Promise<void | void[]> {
        this.completers = [];
        const completersPath = path.join(__dirname, "completers");
        return Promise.all(
            fs.readdirSync(completersPath)
                .filter((completer: string) => !completer.includes(".map"))
                .map((completer: string) => {
                    import(path.join(completersPath, completer)).then(
                        completerModule => {
                            this.completers.push(
                                new completerModule.default()
                            );
                        }
                    );
                })
        )
    }

    public setPath(projectPath: string) {
        this.completers.forEach((completer: Completer) => {
            completer.setPath(projectPath);
        });
    }

    public getItems(
        _textDocumentPosition: TextDocumentPositionParams
    ): CompletionItem[] {
        let completionItems: CompletionItem[] = [];
        this.completers.forEach((completer: Completer) => {
            completionItems = completionItems.concat(completer.getItems());
        });
        return completionItems;
    }
}