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import { GemContext } from './context.ts';
import { pathMatch, MatchFunction } from './deps.ts';
export interface GemRouterOptions {    /**     * The url must begin with the url prefix before any routes are checked against     *      * @example     * ```ts     * import { GemRouter } from 'https://deno.land/x/gem/mod.ts';     *      * const router = new GemRouter({ urlPrefix: 'gemini://localhost' });     *      * router.on('/user/:id', (ctx) => console.log(ctx.params.id)) // Matches gemini://localhost/user/[id]     *      * ```     */    urlPrefix: string,
    /**     * A prefix to be appended before all the routes     */    prefix?: string,}
export type MatchParamsObject = { [key: string]: string };
export class GemRouterContext extends GemContext {    public params: Record<string, string>;    constructor(context: GemContext, params: MatchParamsObject) {        super(context.request, context.response);        this.params = params;    }}
export type GemRouterHandler = (ctx: GemRouterContext) => Promise<unknown> | unknown;

export class GemRouter {    public readonly urlPrefix: string;    public readonly prefix: string;    private registeredRoutes: [MatchFunction<object>, GemRouterHandler][] = [];
    constructor(options: GemRouterOptions) {        this.urlPrefix = options.urlPrefix;        this.prefix = options.prefix || '';    }
    public on(route: string, handler: GemRouterHandler) {        this.registeredRoutes.push([pathMatch(this.prefix + route, { decode: decodeURIComponent }), handler]);    }
    public routes() {        return (ctx: GemContext) => {            const raw = ctx.request.raw;            if (raw.startsWith(this.urlPrefix)) {                for (const [match, func] of this.registeredRoutes) {                    let amatch = match(ctx.request.url.pathname);                    if (amatch) {                        func(new GemRouterContext(ctx, amatch.params as MatchParamsObject));                    }                }            }        }    }}