import json
from pathlib import Path

from central.app.fiscal_completeness import evaluate_field, evaluate_product, load_requiredness_matrix


ROOT = Path(__file__).resolve().parents[2]


def test_requiredness_matrix_covers_contract_fields_once():
    contract = json.loads((ROOT / "docs/FISCAL_FIELD_CONTRACT_V1.json").read_text(encoding="utf-8"))
    matrix = load_requiredness_matrix(ROOT / "docs/FISCAL_REQUIREDNESS_MATRIX_V1.json")

    assert set(matrix["fields"]) == set(contract["fields"])
    assert len(matrix["fields"]) == 23
    assert set(matrix["classifications"]) == {
        "REQUIRED", "CONDITIONAL", "OPTIONAL_REFERENCE", "NOT_APPLICABLE", "ERP_NOT_USED"
    }


def test_conditional_empty_when_not_triggered_is_not_missing():
    matrix = load_requiredness_matrix(ROOT / "docs/FISCAL_REQUIREDNESS_MATRIX_V1.json")

    result = evaluate_field("IPI", None, {"contribuinte_ipi": "N", "has_numeric_tipi": False}, matrix)

    assert result["status"] == "CONDITIONAL_NOT_TRIGGERED"
    assert result["valid"] is True


def test_required_missing_makes_product_incomplete():
    matrix = load_requiredness_matrix(ROOT / "docs/FISCAL_REQUIREDNESS_MATRIX_V1.json")

    result = evaluate_product(
        {"CLASSIFICACAO_FISCAL": None, "CFOP": "5102"},
        {"product_role": "RESALE", "operation": "SALE"},
        matrix,
    )

    assert result["FISCALLY_COMPLETE"] is False
    assert result["fields"]["CLASSIFICACAO_FISCAL"]["status"] == "REQUIRED_MISSING"


def test_erp_not_used_is_not_missing():
    matrix = load_requiredness_matrix(ROOT / "docs/FISCAL_REQUIREDNESS_MATRIX_V1.json")

    result = evaluate_field("IAT", None, {"erp_uses_iat": False}, matrix)

    assert result["status"] == "ERP_NOT_SUPPORTED"
    assert result["valid"] is True