import { contentTypes } from "../content-types";
import { core } from "../core";
import { executionContext } from "../execution-context";
import { httpCodes } from "../http-codes";
import type { RedirectResult, Result } from "../types";
import { loadFile } from "../util";
import { request } from "./index";

type NoUser = {
    [key: string]: unknown;
} & {
    user?: never;
};

const render = async (path: string, ctx?: NoUser): Promise<string> => {
    const fullPath = `${executionContext.diachron_root}/templates/${path}.html.njk`;
    const template = await loadFile(fullPath);
    const user = request.session.getUser();
    const context = { user, ...ctx };
    const engine = core.conf.templateEngine();
    const retval = engine.renderTemplate(template, context);

    return retval;
};

const html = (payload: string): Result => {
    const retval: Result = {
        code: httpCodes.success.OK,
        result: payload,
        contentType: contentTypes.text.html,
    };

    return retval;
};

const redirect = (location: string): RedirectResult => {
    return {
        code: httpCodes.redirection.SeeOther,
        contentType: contentTypes.text.plain,
        result: "",
        redirect: location,
    };
};

export { html, redirect, render };