import json

import pytest

from core.domain.errors import (
    CDRProcessingError,
    FailureReason,
)
from core.worker.processor import (
    decode_payload,
    process_payload,
)


def valid_payload() -> dict:
    return {
        "raw_id": "raw-worker-001",
        "src_ip": "10.240.12.1",
        "device_id": "310410998877665",
        "caller_num": "0019875551234",
        "svc": "4G_DATA",
        "up_bytes": 100,
        "down_bytes": 200,
        "rat": 6,
        "lac": "4021",
        "ci": "8812",
        "epoch_start": 1789900000,
        "epoch_end": 1789900300,
    }


def test_decode_valid_json_object() -> None:
    value = json.dumps(
        valid_payload()
    ).encode("utf-8")

    payload = decode_payload(value)

    assert payload == valid_payload()


def test_malformed_json() -> None:
    with pytest.raises(
        CDRProcessingError
    ) as exc_info:
        decode_payload(
            b'{"raw_id": invalid}'
        )

    assert (
        exc_info.value.reason
        == FailureReason.MALFORMED_JSON
    )


def test_json_array_is_rejected() -> None:
    with pytest.raises(
        CDRProcessingError
    ) as exc_info:
        decode_payload(
            b'["not", "a", "cdr"]'
        )

    assert (
        exc_info.value.reason
        == FailureReason.NORMALIZATION_ERROR
    )


def test_worker_normalizes_valid_payload() -> None:
    normalized = process_payload(
        valid_payload()
    )

    assert normalized.raw_id == "raw-worker-001"
    assert normalized.radio_access_type == "LTE_4G"
    assert normalized.total_bytes == 300
    assert normalized.duration_seconds == 300