from pathlib import Path

import pytest

from app.bot import (
    parse_cancellation,
    parse_category,
    parse_transaction,
    webapp_url_for_user,
)
from app.config import Settings
from app.db import Database


def make_database(tmp_path: Path) -> Database:
    database = Database(tmp_path / "test.sqlite3")
    database.initialize()
    return database


def add_user(database: Database, user_id: int, name: str) -> None:
    database.upsert_user(
        user_id=user_id,
        first_name=name,
        last_name=None,
        username=None,
    )


def test_transaction_and_leaderboard(tmp_path: Path) -> None:
    database = make_database(tmp_path)
    add_user(database, 1, "Аня")
    item = parse_transaction(
        '{"v":1,"type":"transaction","kind":"income","amount":"1000.50","category":"Зарплата","occurred_at":"2026-01-01T00:00:00Z"}'
    )
    database.add_transaction(1, item)
    expense = parse_transaction(
        '{"v":1,"type":"transaction","kind":"expense","amount":"250.25","category":"Еда","occurred_at":"2026-01-02T00:00:00Z"}'
    )
    database.add_transaction(1, expense)

    summary = database.summary(1)
    assert summary is not None
    assert summary["income_cents"] == 100_050
    assert summary["expense_cents"] == 25_025
    assert summary["saved_percent"] == 75.0
    assert database.leaderboard()[0]["nickname"] == "Аня"


def test_friendship_is_symmetric_and_idempotent(tmp_path: Path) -> None:
    database = make_database(tmp_path)
    add_user(database, 3, "Три")
    add_user(database, 7, "Семь")

    assert database.add_friendship(7, 3)
    assert not database.add_friendship(3, 7)
    assert database.friend_ids(3) == [7]
    assert database.friend_ids(7) == [3]


def test_filtered_leaderboard(tmp_path: Path) -> None:
    database = make_database(tmp_path)
    for user_id in (1, 2, 3):
        add_user(database, user_id, str(user_id))

    database.add_transaction(
        1,
        parse_transaction(
            '{"v":1,"type":"transaction","kind":"income","amount":"100","category":"Работа"}'
        ),
    )
    database.add_transaction(
        3,
        parse_transaction(
            '{"v":1,"type":"transaction","kind":"expense","amount":"40","category":"Еда"}'
        ),
    )

    result = database.leaderboard(user_ids=[1, 3])
    assert [item["user_id"] for item in result] == [1, 3]
    filtered = database.leaderboard(user_ids=[1, 3], categories=["Еда"])
    assert filtered[0]["user_id"] == 1
    assert filtered[0]["balance_cents"] == 0
    assert filtered[1]["user_id"] == 3
    assert filtered[1]["balance_cents"] == -4_000


@pytest.mark.parametrize(
    "payload",
    [
        "not-json",
        '{"v":1,"type":"transaction","kind":"other","amount":"10","category":"Еда"}',
        '{"v":1,"type":"transaction","kind":"income","amount":"-1","category":"Зарплата"}',
        '{"v":1,"type":"transaction","kind":"income","amount":"10","category":""}',
    ],
)
def test_rejects_invalid_webapp_payload(payload: str) -> None:
    with pytest.raises(ValueError):
        parse_transaction(payload)


def test_personalized_keyboard_webapp_url(tmp_path: Path) -> None:
    settings = Settings(
        telegram_token="token",
        base_app_url="https://example.com/",
        data_dir=tmp_path,
    )
    assert webapp_url_for_user(settings, 123456) == (
        "https://example.com/app/?user_id=123456&mode=keyboard"
    )


def test_custom_category_and_cancellation(tmp_path: Path) -> None:
    database = make_database(tmp_path)
    add_user(database, 10, "Владелец")
    add_user(database, 11, "Другой")
    kind, name = parse_category(
        '{"v":1,"type":"category_create","kind":"expense","category":"Подписки"}'
    )
    assert database.add_category(10, kind, name)
    assert not database.add_category(10, kind, name)
    assert database.user_categories(10) == [{"kind": "expense", "name": "Подписки"}]

    transaction_id = database.add_transaction(
        10,
        parse_transaction(
            '{"v":1,"type":"transaction","kind":"expense","amount":"499","category":"Подписки"}'
        ),
    )
    assert parse_cancellation(
        f'{{"v":1,"type":"transaction_cancel","transaction_id":{transaction_id}}}'
    ) == transaction_id
    assert not database.cancel_transaction(11, transaction_id)
    assert database.cancel_transaction(10, transaction_id)
    assert not database.cancel_transaction(10, transaction_id)
    assert database.transactions(10) == []
    assert database.summary(10)["expense_cents"] == 0
    assert database.user_categories(10) == [{"kind": "expense", "name": "Подписки"}]