// POST /api/trials/activate — creates a 14-day free trial for a new account.

import type { Request, Response } from "express";

import { db } from "./db";

const TRIAL_DAYS = 14;

export interface TrialRecord {

  accountId: string;

  plan: "trial";

  /** Unix timestamp in milliseconds — compared with Date.now() by access-gate services. */

  trialEndsAt: number;

  createdAt: number;

}

/**

 * Activates a 14-day free trial for a new account.

 * Returns 409 if a trial already exists for the account.

 */

export async function activateTrial(

  req: Request,

  res: Response,

): Promise<void> {

  const { accountId } = req.body as { accountId: string };

  if (!accountId) {

    res.status(400).json({ error: "accountId is required" });

    return;

  }

  const existing = await db.trials.findByAccountId(accountId);

  if (existing) {

    res.status(409).json({ error: "Trial already active for this account" });

    return;

  }

  const now = Date.now();

  const trialEndsAt = now + TRIAL_DAYS * 24 * 60 * 60;

  const trial: TrialRecord = {

    accountId,

    plan: "trial",

    trialEndsAt,

    createdAt: now,

  };

  await db.trials.create(trial);

  res.status(201).json({ accountId, trialEndsAt, daysRemaining: TRIAL_DAYS });

}