from app.billing.backend.supplier_invoices import (
    _build_template_builder_result,
    _hybrid_validate_invoice,
    _smart_extract_lines,
)


DCS_TEXT = """
Nr. Varenr Tekst Model Antal Pris Beløb-
1 1003550858 Apple iPhone 15 6,1 128GB - Blå - Grade A NP/IPH/15/128/BLUE/A 1 3.149,00 3.149,00
Omvendt betalingspligt*
KN8: 84713000
EAN: 5711802732536
S/N: MQJYVVF7TJ
2 1001562408 PanzerGlass SAFE. by TPU Case Transparent SAFE95538 1 49,00 49,00
3 1002365988 SAFE. by PanzerGlass Apple iPhone 16, 15 | Ul SAFE95875 4 49,00 196,00
4 1002484222 Apple iPhone 16 6,1 128GB - Sort MYE73QN/A 1 5.099,00 5.099,00
Omvendt betalingspligt*
5 1002365899 PanzerGlass CARE by Feature Case Transparent 1325 1 59,00 59,00
6 1000775307 Huawei E3372-325 Trådløs mobilmodem Trådløs 51071UXG 1 189,00 189,00
7 1003143468 Apple 11-inch iPad Air M3 Wi-Fi 11 128GB 8GB MC9W4KN/A 2 4.299,00 8.598,00
Omvendt betalingspligt*
8 68678 PostNord - Erhverv - Fast fragt 40 - DK - 1-5 1 40,00 40,00
Varebeløb Momsgrundlag Moms Momssats Totalbeløb DKK
17.379,00 533,00 133,25 25,00% 17.512,25
"""


def test_dcs_layout_extracts_all_lines_and_metadata():
    lines = _smart_extract_lines(DCS_TEXT)

    assert len(lines) == 8
    assert lines[0]["unit_price"] == 3149.0
    assert lines[0]["ean"] == "5711802732536"
    assert lines[0]["serial_numbers"] == ["MQJYVVF7TJ"]
    assert lines[0]["reverse_charge"] is True
    assert lines[6]["line_total"] == 8598.0


def test_hybrid_validation_understands_reverse_charge_summary():
    result = _hybrid_validate_invoice({"lines": [], "total_amount": "17.512,25"}, DCS_TEXT)
    validation = result["_hybrid_validation"]

    assert validation["status"] == "validated"
    assert validation["line_count"] == 8
    assert validation["line_sum"] == 17379.0
    assert validation["document_totals"]["vat_basis"] == 533.0
    assert result["total_amount"] == 17512.25


def test_generic_layout_accepts_alphanumeric_supplier_sku_and_english_amounts():
    text = "1 ABC-123 Managed router service 2 1,250.00 2,500.00"

    lines = _smart_extract_lines(text)

    assert len(lines) == 1
    assert lines[0]["sku"] == "ABC-123"
    assert lines[0]["quantity"] == 2.0
    assert lines[0]["unit_price"] == 1250.0
    assert lines[0]["line_total"] == 2500.0


def test_template_builder_overrides_wrong_ai_values_and_excludes_buyer_identity():
    text = """
Faktura
Nummer 5055616
Dato 2/10-25
Momsnr. DK29522790
BMC Denmark ApS
Lejrvej 39
Nr. Varenr Tekst Model Antal Pris Beløb-
1 1000822111 Apple TV 4K MN893MP/A 1 1.099,00 1.099,00
2 1000809070 Xiaomi Air Purifier BHR5860EU 2 499,00 998,00
3 1003114298 Lenovo ThinkPad L-T14G2-SCA-B102 1 1.999,00 1.999,00
4 1003283728 HPE SmartMemory RFB-815101-B21 2 569,00 1.138,00
5 68678 PostNord Erhverv Fast fragt 1 40,00 40,00
Varebeløb Momsgrundlag Moms Momssats Totalbeløb DKK
5.274,00 3.275,00 818,75 25,00% 6.092,75
DCS ApS CVR: DK26686091 www.dcs.dk
"""
    bad_ai_result = {
        "total_amount": "2097",
        "cvr": "29522790",
        "detection_patterns": ["BMC Denmark ApS", "Lejrvej 39", "3500 Værløse"],
    }

    result = _build_template_builder_result(
        text,
        bad_ai_result,
        {"name": "DCS ApS", "cvr_number": "26686091"},
    )

    assert result["invoice_number"]["value"] == "5055616"
    assert result["invoice_date"]["value"] == "2/10-25"
    assert result["total_amount"]["value"] == "6092.75"
    assert result["cvr"]["value"] == "26686091"
    assert "BMC Denmark ApS" not in result["detection_patterns"]
    assert "Lejrvej 39" not in result["detection_patterns"]
    assert "DCS ApS" in result["detection_patterns"]
    assert result["line_count"] == 5

    for field in ("invoice_number", "invoice_date", "total_amount", "cvr"):
        match = __import__("re").search(result[field]["pattern"], text, __import__("re").IGNORECASE | __import__("re").MULTILINE)
        assert match, field