"""The event model and its output formatting."""

import json

import pytest

from rdm_card_reader.card import (
    CONFIG_CARD_VALUE,
    CardEvent,
    format_event,
)

SAMPLE = CardEvent(
    event="card_inserted",
    timestamp="2026-10-01 12:00:00",
    value=0x00C4A0B5,
    checksum=0xDE,
    card_type=0x0F,
    is_valid=True,
    port="/dev/ttyS0",
)


def test_hex_value_is_zero_padded_to_eight_digits():
    assert SAMPLE.hex_value == "0x00C4A0B5"


def test_from_card_accepts_any_object_with_the_right_fields():
    class FakeCard:
        value = 1234
        checksum = 5
        type = 15
        is_valid = True

    event = CardEvent.from_card("card_inserted", FakeCard(), "/dev/ttyUSB0")
    assert event.value == 1234
    assert event.hex_value == "0x000004D2"
    assert event.port == "/dev/ttyUSB0"


def test_to_dict_has_the_documented_keys():
    assert set(SAMPLE.to_dict()) == {
        "event", "timestamp", "id", "hex", "type", "checksum", "is_valid", "port",
    }


def test_to_json_is_parseable():
    assert json.loads(SAMPLE.to_json())["hex"] == "0x00C4A0B5"


def test_inserted_block_lists_the_card_data():
    text = format_event(SAMPLE)
    assert "CARD INSERTED" in text
    assert "12886197" in text
    assert "0x00C4A0B5" in text
    assert "0x0F" in text
    assert "222" in text
    assert "True" in text


def test_config_card_is_flagged_in_the_note():
    event = CardEvent(
        event="card_inserted",
        timestamp="2026-10-01 12:00:00",
        value=CONFIG_CARD_VALUE,
        checksum=0,
        card_type=0x0F,
        is_valid=True,
        port="/dev/ttyS0",
    )
    text = format_event(event)
    assert "config card" in text
    assert str(CONFIG_CARD_VALUE) in text


def test_ordinary_card_has_no_config_note():
    assert "config card" not in format_event(SAMPLE)


def test_removed_line_is_single_line():
    event = CardEvent(
        event="card_removed",
        timestamp="2026-10-01 12:00:00",
        value=0x00C4A0B5,
        checksum=0xDE,
        card_type=0x0F,
        is_valid=True,
        port="/dev/ttyS0",
    )
    text = format_event(event)
    assert text.count("\n") == 0
    assert "CARD REMOVED" in text


def test_invalid_line_mentions_checksum():
    event = CardEvent(
        event="invalid_card",
        timestamp="2026-10-01 12:00:00",
        value=0xDEADBEEF,
        checksum=0,
        card_type=0x0F,
        is_valid=False,
        port="/dev/ttyS0",
    )
    assert "checksum mismatch" in format_event(event)


@pytest.mark.parametrize("value,expected", [(0, "0x00000000"), (0xFFFFFFFF, "0xFFFFFFFF")])
def test_hex_value_boundaries(value, expected):
    event = CardEvent("card_inserted", "-", value, 0, 0x0F, True, "p")
    assert event.hex_value == expected