function assert(condition: unknown, message = "assertion failed"): void {
  if (!condition) throw new Error(message);
}

function assertEqual<T>(actual: T, expected: T, message = "values should be equal"): void {
  if (actual !== expected) throw new Error(`${message}: expected ${String(expected)}, got ${String(actual)}`);
}

function assertDeepEqual(actual: unknown, expected: unknown, message = "values should be deeply equal"): void {
  const actualJson = JSON.stringify(actual);
  const expectedJson = JSON.stringify(expected);
  if (actualJson !== expectedJson) throw new Error(`${message}: expected ${expectedJson}, got ${actualJson}`);
}

import {
  mailProfileChildDescriptors,
  mailProfileEditTargetInitialSection,
  mailProfileEditTargetPanelMode,
  mailProfileEditTargetShowsProfileFields,
  mailProfileEditTargetShowsSettingsPanel,
  mailProfileEditTargetVisibleSections,
  mailProfileCreateCredentialsPayload,
  mailProfileTargetedUpdatePayload
} from "../src/features/mail/mailProfileEditorModel";

const smtpOnlyChildren = mailProfileChildDescriptors({ id: "profile-1", imap: null });
assertDeepEqual(
  smtpOnlyChildren.map((child) => `${child.kind}:${child.protocol}`),
  ["server:smtp", "credential:smtp", "server:imap"],
  "SMTP-only profiles expose SMTP server/credentials and an addable IMAP server"
);
assert(!smtpOnlyChildren.some((child) => child.kind === "credential" && child.protocol === "imap"), "IMAP credentials are hidden until an IMAP server exists");

const fullChildren = mailProfileChildDescriptors({ id: "profile-1", imap: { host: "imap.example.org" } });
assertDeepEqual(
  fullChildren.map((child) => `${child.kind}:${child.protocol}`),
  ["server:smtp", "credential:smtp", "server:imap", "credential:imap"],
  "profiles with IMAP expose focused rows for both transports and credentials"
);

assertEqual(mailProfileEditTargetInitialSection({ kind: "server", protocol: "imap" }), "imap");
assertEqual(mailProfileEditTargetPanelMode({ kind: "server", protocol: "smtp" }), "server");
assertEqual(mailProfileEditTargetPanelMode({ kind: "credentials", protocol: "imap" }), "credentials");
assertEqual(mailProfileEditTargetPanelMode({ kind: "profile" }), null);
assertDeepEqual(mailProfileEditTargetVisibleSections({ kind: "create" }), ["smtp", "imap"]);
assertDeepEqual(mailProfileEditTargetVisibleSections({ kind: "credentials", protocol: "imap" }), ["imap"]);
assertEqual(mailProfileEditTargetShowsProfileFields({ kind: "profile" }), true);
assertEqual(mailProfileEditTargetShowsProfileFields({ kind: "server", protocol: "smtp" }), false);
assertEqual(mailProfileEditTargetShowsSettingsPanel({ kind: "profile" }), false);
assertEqual(mailProfileEditTargetShowsSettingsPanel({ kind: "create" }), true);

const updateParts = {
  profile: { name: "Renamed" },
  smtp: { host: "smtp.example.org" },
  imap: { host: "imap.example.org" },
  credentials: {
    smtp: { username: "smtp-user", password: "smtp-secret" },
    imap: { username: "imap-user", password: "imap-secret" }
  },
  clearImap: false
};
assertDeepEqual(
  mailProfileTargetedUpdatePayload({ kind: "profile" }, updateParts),
  { name: "Renamed" },
  "profile edits do not replay transport or credential fields"
);
assertDeepEqual(
  mailProfileTargetedUpdatePayload({ kind: "server", protocol: "smtp" }, updateParts),
  { smtp: { host: "smtp.example.org" } },
  "server edits do not replay credential fields"
);
assertDeepEqual(
  mailProfileTargetedUpdatePayload({ kind: "credentials", protocol: "imap" }, updateParts),
  { credentials: { imap: { username: "imap-user", password: "imap-secret" } } },
  "credential edits send only the selected protocol"
);
assertEqual(
  mailProfileCreateCredentialsPayload({ username: null }, { password: "" }),
  undefined,
  "credential-free creates omit the credential object"
);
assertDeepEqual(
  mailProfileCreateCredentialsPayload(
    { username: "smtp-user", password: null },
    { username: null, password: "imap-secret" }
  ),
  { smtp: { username: "smtp-user" }, imap: { password: "imap-secret" } },
  "create payloads retain only explicitly populated credential fields"
);