import random
from typing import List, Tuple


Record = Tuple[str, str]


def generate_records(n: int, repeat_names: bool = False, seed: int = 42) -> List[Record]:
    rng = random.Random(seed)
    records: List[Record] = []

    if repeat_names:
        name_pool = [
            "User_Alex", "User_Bob", "User_Cat", "User_Dan", "User_Eva",
            "User_Fox", "User_Geo", "User_Hen", "User_Ira", "User_Leo",
        ]
        for _ in range(n):
            name = rng.choice(name_pool)
            phone = f"{rng.randint(1000000000, 9999999999)}"
            records.append((name, phone))
    else:
        for i in range(n):
            name = f"User_{i:05d}"
            phone = f"{1000000000 + i}"
            records.append((name, phone))

    return records


def prepare_records_variants(records: List[Record], seed: int = 42):
    rng = random.Random(seed)
    records_shuffled = list(records)
    rng.shuffle(records_shuffled)
    records_sorted = sorted(records, key=lambda x: x[0])
    return records_shuffled, records_sorted