import { prisma } from "../db";
import { revealDb } from "./db";
import { logOperatorEvent, type OperatorSession } from "./session";
import { sendTo } from "../mail";

/* Revealing a facility's coordinator contacts.
 *
 * The console's ordinary role cannot read a coordinator's name, email or phone — the production
 * probe proves it. Reading one is therefore not a display option but a separate act with four
 * parts, all of them here and nowhere else:
 *
 *   1. a typed reason, kept in full;
 *   2. a RevealGrant row on the server — the window is thirty minutes and it is the row that says
 *      so, not a claim in a cookie, so it can be shortened or revoked by deleting it;
 *   3. an OperatorEvent, in the trail that outlives the facility;
 *   4. an email to the owner, every time. A trail nobody reads is a record, not a control.
 *
 * The read itself goes through revealDb(), the ops_reveal role: four columns of one table. A
 * future edit that widens the select fails at the database, exactly as it would in a projection.
 *
 * Scope is the three contact columns of a Facility. Nothing about a wearer is revealable at any
 * level, and nothing in this module knows a wearer's table exists. */

export const REVEAL_MINUTES = 30;
/** One grant covers the three contact columns together; they are one decision and one email. */
export const REVEAL_FIELD = "contacts";
export const REASON_MIN = 8;
export const REASON_MAX = 400;

export type Revealed = {
  coordinator: string;
  coordinatorEmail: string;
  coordinatorPhone: string;
  reason: string;
  at: Date;
  expiresAt: Date;
};

/** The operator's own unexpired grant for this facility, if any. Grants are per operator: one
 *  person's reason does not open the contacts for another. */
export async function activeReveal(operatorId: string, facilityId: string) {
  return prisma.revealGrant.findFirst({
    where: { operatorId, facilityId, field: REVEAL_FIELD, expiresAt: { gt: new Date() } },
    orderBy: { expiresAt: "desc" },
    select: { id: true, reason: true, at: true, expiresAt: true },
  });
}

/** The contacts, only while a grant is active. Without one this returns null without touching
 *  the reveal role at all — the grant check comes first, and the read is conditional on it. */
export async function revealedContacts(operatorId: string, facilityId: string): Promise<Revealed | null> {
  const g = await activeReveal(operatorId, facilityId);
  if (!g) return null;
  const f = await revealDb().facility.findUnique({
    where: { id: facilityId },
    select: { coordinator: true, coordinatorEmail: true, coordinatorPhone: true },
  });
  if (!f) return null;
  return { ...f, reason: g.reason, at: g.at, expiresAt: g.expiresAt };
}

/** Where the copy of every reveal goes. The owner's address, settable apart from the operator
 *  who did the revealing so that a second operator's reveals still reach the owner. */
export function alertAddress(fallback: string) {
  return (process.env.OPS_ALERT_TO || fallback).trim();
}

export async function grantReveal(args: {
  operator: OperatorSession;
  facilityId: string;
  facilityName: string;
  reason: string;
  ip: string;
}): Promise<{ expiresAt: Date; mailed: boolean }> {
  const { operator, facilityId, facilityName, ip } = args;
  const reason = args.reason.trim().slice(0, REASON_MAX);
  const now = new Date();
  const expiresAt = new Date(now.getTime() + REVEAL_MINUTES * 60 * 1000);

  await prisma.revealGrant.create({
    data: { operatorId: operator.id, facilityId, field: REVEAL_FIELD, reason, at: now, expiresAt },
  });
  logOperatorEvent({ operatorId: operator.id, action: "ops:reveal", facilityId, subject: facilityName, detail: reason, ip });

  // The email says who, which facility, why and until when — never the contacts themselves. It
  // is a notice that a reveal happened, and it must be safe to sit in a mailbox.
  const when = now.toLocaleString("en-AU", { timeZone: "Australia/Brisbane", dateStyle: "medium", timeStyle: "short" });
  const until = expiresAt.toLocaleTimeString("en-AU", { timeZone: "Australia/Brisbane", hour: "2-digit", minute: "2-digit" });
  const text = [
    `${operator.name} (${operator.email}) revealed the coordinator contacts of a facility on the ThreadCount operations console.`,
    "",
    `Facility:  ${facilityName}`,
    `When:      ${when} (Brisbane)`,
    `Until:     ${until}`,
    `From:      ${ip || "unknown address"}`,
    `Reason:    ${reason}`,
    "",
    "This is written to the operator trail. If it wasn't you, sign the operator out and change the password.",
  ].join("\n");
  const mailed = await sendTo(alertAddress(operator.email), `[ops] Contacts revealed — ${facilityName}`, text);
  if (!mailed) logOperatorEvent({ operatorId: operator.id, action: "ops:reveal.unmailed", facilityId, subject: facilityName, ip });
  return { expiresAt, mailed };
}