"""Tests for invoice schema validation."""

from __future__ import annotations

from decimal import Decimal

import pytest
from pydantic import ValidationError

from odoo_ocr.schemas import ExtractedInvoice, InvoiceLineItem


def test_accepts_valid_iso_dates() -> None:
    invoice = ExtractedInvoice(
        vendor_name="A",
        invoice_number="1",
        invoice_date="2024-01-01",
        due_date="2024-02-01",
    )
    assert invoice.invoice_date == "2024-01-01"
    assert invoice.due_date == "2024-02-01"


def test_rejects_non_iso_date_format() -> None:
    with pytest.raises(ValidationError, match="ISO 8601"):
        ExtractedInvoice(
            vendor_name="A",
            invoice_number="1",
            invoice_date="May 1, 2024",
        )


def test_rejects_invalid_calendar_date() -> None:
    with pytest.raises(ValidationError, match="not a valid calendar date"):
        ExtractedInvoice(
            vendor_name="A",
            invoice_number="1",
            invoice_date="2024-02-30",
        )


def test_due_date_optional() -> None:
    invoice = ExtractedInvoice(
        vendor_name="A",
        invoice_number="1",
        invoice_date="2024-01-01",
    )
    assert invoice.due_date is None


def test_invoice_line_item_decimal_coercion() -> None:
    line = InvoiceLineItem(
        description="Widgets",
        quantity="2",
        unit_price="10.5",
        total_price="21.0",
        tax_rate="20",
    )
    assert line.quantity == Decimal("2")
    assert line.unit_price == Decimal("10.5")
    assert line.total_price == Decimal("21.0")
    assert line.tax_rate == Decimal("20")


def test_invoice_line_item_rejects_negative_values() -> None:
    with pytest.raises(ValidationError):
        InvoiceLineItem(description="X", quantity=-1)
    with pytest.raises(ValidationError):
        InvoiceLineItem(description="X", unit_price=-1)
    with pytest.raises(ValidationError):
        InvoiceLineItem(description="X", tax_rate=-5)


def test_line_items_sum() -> None:
    invoice = ExtractedInvoice(
        vendor_name="A",
        invoice_number="1",
        invoice_date="2024-01-01",
        line_items=[
            InvoiceLineItem(description="X", total_price=Decimal("100")),
            InvoiceLineItem(description="Y", total_price=Decimal("50.50")),
        ],
    )
    assert invoice.line_items_sum() == Decimal("150.50")