import bcrypt from "bcryptjs";
import { randomUUID } from "node:crypto";
import { db } from "./db.js";

const DEMO_EMAIL_ALICE = "alice@demo.msn";
const DEMO_EMAIL_BOB = "bob@demo.msn";
const DEMO_PASSWORD = "demo1234";

/** Stable UUIDs for docs and debugging. */
export const DemoIds = {
  alice: "a1111111-1111-4111-8111-111111111111",
  bob: "b2222222-2222-4222-8222-222222222222",
  ctxAlicePersonal: "c1111111-1111-4111-8111-111111111111",
  ctxBobPersonal: "c2222222-2222-4222-8222-222222222222",
  ctxWork: "d3333333-3333-4333-8333-333333333333",
  roomWorkDm: "e4444444-4444-4444-8444-444444444444",
  /** Alice–Bob DM in Alice's personal context */
  roomPersonalDm: "f1111111-1111-4111-8111-111111111111",
  /** Group room in work context */
  roomWorkGroup: "g1111111-1111-4111-8111-111111111111",
} as const;

/** Stable portrait URLs for Flutter NetworkImage (HTTPS, JPG). */
const DEMO_AVATAR_ALICE_PERSONAL = "https://i.pravatar.cc/400?img=47";
const DEMO_AVATAR_BOB_PERSONAL = "https://i.pravatar.cc/400?img=33";
const DEMO_AVATAR_ALICE_WORK = "https://i.pravatar.cc/400?img=12";
const DEMO_AVATAR_BOB_WORK = "https://i.pravatar.cc/400?img=59";

/**
 * Demo users, personal + work contexts, profiles, DM + sample messages.
 * Skips if alice@demo.msn already exists (idempotent).
 */
export function seedDemoIfNeeded(): void {
  const exists = db.prepare(`SELECT id FROM users WHERE email = ?`).get(DEMO_EMAIL_ALICE) as
    | { id: string }
    | undefined;
  if (exists) {
    return;
  }

  const hash = bcrypt.hashSync(DEMO_PASSWORD, 10);
  const { alice, bob, ctxAlicePersonal, ctxBobPersonal, ctxWork, roomWorkDm } = DemoIds;

  db.prepare(`INSERT INTO users (id, email, password_hash) VALUES (?, ?, ?)`).run(
    alice,
    DEMO_EMAIL_ALICE,
    hash
  );
  db.prepare(`INSERT INTO users (id, email, password_hash) VALUES (?, ?, ?)`).run(
    bob,
    DEMO_EMAIL_BOB,
    hash
  );

  db.prepare(`INSERT INTO contexts (id, name, kind) VALUES (?, ?, 'personal')`).run(
    ctxAlicePersonal,
    "일상"
  );
  db.prepare(`INSERT INTO contexts (id, name, kind) VALUES (?, ?, 'personal')`).run(
    ctxBobPersonal,
    "일상"
  );
  db.prepare(
    `INSERT INTO contexts (id, name, kind, retention_days, screenshot_blocked) VALUES (?, ?, 'work', 365, 0)`
  ).run(ctxWork, "데모 회사");

  db.prepare(
    `INSERT INTO context_members (context_id, user_id, role) VALUES (?, ?, 'owner')`
  ).run(ctxAlicePersonal, alice);
  db.prepare(
    `INSERT INTO context_members (context_id, user_id, role) VALUES (?, ?, 'owner')`
  ).run(ctxBobPersonal, bob);
  db.prepare(
    `INSERT INTO context_members (context_id, user_id, role) VALUES (?, ?, 'owner')`
  ).run(ctxWork, alice);
  db.prepare(
    `INSERT INTO context_members (context_id, user_id, role) VALUES (?, ?, 'member')`
  ).run(ctxWork, bob);

  db.prepare(
    `INSERT INTO profiles (user_id, context_id, display_name, avatar_url, status_message) VALUES (?, ?, ?, ?, ?)`
  ).run(
    alice,
    ctxAlicePersonal,
    "앨리스",
    DEMO_AVATAR_ALICE_PERSONAL,
    "일상 프로필 · 친구들과 수다"
  );
  db.prepare(
    `INSERT INTO profiles (user_id, context_id, display_name, avatar_url, status_message) VALUES (?, ?, ?, ?, ?)`
  ).run(bob, ctxBobPersonal, "밥", DEMO_AVATAR_BOB_PERSONAL, "일상 상태 메시지");

  db.prepare(
    `INSERT INTO profiles (user_id, context_id, display_name, avatar_url, status_message) VALUES (?, ?, ?, ?, ?)`
  ).run(alice, ctxWork, "김앨리스 (기획)", DEMO_AVATAR_ALICE_WORK, "회사 맥락 전용 표시명");
  db.prepare(
    `INSERT INTO profiles (user_id, context_id, display_name, avatar_url, status_message) VALUES (?, ?, ?, ?, ?)`
  ).run(bob, ctxWork, "박밥 (백엔드)", DEMO_AVATAR_BOB_WORK, "동료에게만 보이는 이름");

  db.prepare(
    `INSERT INTO rooms (id, context_id, is_group, name) VALUES (?, ?, 0, NULL)`
  ).run(roomWorkDm, ctxWork);
  db.prepare(`INSERT INTO room_members (room_id, user_id) VALUES (?, ?)`).run(roomWorkDm, alice);
  db.prepare(`INSERT INTO room_members (room_id, user_id) VALUES (?, ?)`).run(roomWorkDm, bob);

  const m1 = randomUUID();
  const m2 = randomUUID();
  const m3 = randomUUID();
  db.prepare(
    `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
  ).run(m1, roomWorkDm, bob, "안녕하세요, 회의 자료 공유드립니다.");
  db.prepare(
    `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
  ).run(m2, roomWorkDm, alice, "확인했습니다. 오후에 뵐게요.");
  db.prepare(
    `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
  ).run(m3, roomWorkDm, bob, "네, 감사합니다.");

  console.log("");
  console.log("========== DEMO DATA SEEDED ==========");
  console.log(`  ${DEMO_EMAIL_ALICE} / ${DEMO_PASSWORD}  (Alice — switch to \"데모 회사\")`);
  console.log(`  ${DEMO_EMAIL_BOB}   / ${DEMO_PASSWORD}  (Bob — second account)`);
  console.log("======================================");
  console.log("");
}

/**
 * Fills demo avatar_url for existing DBs seeded before avatars were added.
 * Safe to run on every startup (only updates NULL/empty for known demo rows).
 */
export function backfillDemoAvatarsIfNeeded(): void {
  const { alice, bob, ctxAlicePersonal, ctxBobPersonal, ctxWork } = DemoIds;
  const rows: Array<[string, string, string]> = [
    [alice, ctxAlicePersonal, DEMO_AVATAR_ALICE_PERSONAL],
    [bob, ctxBobPersonal, DEMO_AVATAR_BOB_PERSONAL],
    [alice, ctxWork, DEMO_AVATAR_ALICE_WORK],
    [bob, ctxWork, DEMO_AVATAR_BOB_WORK],
  ];
  const stmt = db.prepare(
    `UPDATE profiles SET avatar_url = ? WHERE user_id = ? AND context_id = ? AND (avatar_url IS NULL OR avatar_url = '')`
  );
  for (const [uid, cid, url] of rows) {
    stmt.run(url, uid, cid);
  }
}

/**
 * Extra demo: Bob in Alice's personal context, personal DM, work group room + messages.
 * Idempotent — safe on every startup (uses INSERT OR IGNORE / message count checks).
 */
export function extendDemoDataIfNeeded(): void {
  const exists = db.prepare(`SELECT id FROM users WHERE email = ?`).get(DEMO_EMAIL_ALICE) as
    | { id: string }
    | undefined;
  if (!exists) {
    return;
  }

  const { alice, bob, ctxAlicePersonal, ctxWork, roomPersonalDm, roomWorkGroup } = DemoIds;

  db.prepare(
    `INSERT OR IGNORE INTO context_members (context_id, user_id, role) VALUES (?, ?, 'member')`
  ).run(ctxAlicePersonal, bob);

  db.prepare(
    `INSERT OR IGNORE INTO profiles (user_id, context_id, display_name, avatar_url, status_message) VALUES (?, ?, ?, ?, ?)`
  ).run(
    bob,
    ctxAlicePersonal,
    "밥",
    DEMO_AVATAR_BOB_PERSONAL,
    "앨리스 일상에서 보이는 상태"
  );

  db.prepare(
    `INSERT OR IGNORE INTO rooms (id, context_id, is_group, name) VALUES (?, ?, 0, NULL)`
  ).run(roomPersonalDm, ctxAlicePersonal);
  db.prepare(`INSERT OR IGNORE INTO room_members (room_id, user_id) VALUES (?, ?)`).run(
    roomPersonalDm,
    alice
  );
  db.prepare(`INSERT OR IGNORE INTO room_members (room_id, user_id) VALUES (?, ?)`).run(
    roomPersonalDm,
    bob
  );

  const personalMsgN = db
    .prepare(`SELECT COUNT(*) as n FROM messages WHERE room_id = ?`)
    .get(roomPersonalDm) as { n: number };
  if (personalMsgN.n === 0) {
    const a = randomUUID();
    const b = randomUUID();
    const c = randomUUID();
    db.prepare(
      `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
    ).run(a, roomPersonalDm, alice, "주말에 카페 갈래?");
    db.prepare(
      `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
    ).run(b, roomPersonalDm, bob, "좋아, 몇 시에 볼까?");
    db.prepare(
      `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
    ).run(c, roomPersonalDm, alice, "2시 어때?");
  }

  db.prepare(
    `INSERT OR IGNORE INTO rooms (id, context_id, is_group, name) VALUES (?, ?, 1, ?)`
  ).run(roomWorkGroup, ctxWork, "프로젝트 A");
  db.prepare(`INSERT OR IGNORE INTO room_members (room_id, user_id) VALUES (?, ?)`).run(
    roomWorkGroup,
    alice
  );
  db.prepare(`INSERT OR IGNORE INTO room_members (room_id, user_id) VALUES (?, ?)`).run(
    roomWorkGroup,
    bob
  );

  const groupMsgN = db
    .prepare(`SELECT COUNT(*) as n FROM messages WHERE room_id = ?`)
    .get(roomWorkGroup) as { n: number };
  if (groupMsgN.n === 0) {
    const m1 = randomUUID();
    const m2 = randomUUID();
    db.prepare(
      `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
    ).run(m1, roomWorkGroup, alice, "[프로젝트 A] 킥오프 슬라이드 올려뒀어요.");
    db.prepare(
      `INSERT INTO messages (id, room_id, sender_id, body, kind) VALUES (?, ?, ?, ?, 'text')`
    ).run(m2, roomWorkGroup, bob, "확인했습니다. 내일 정리해서 공유할게요.");
  }
}