from __future__ import annotations

import unittest

from iaai_scraper.browser.pace import HumanPacer
from iaai_scraper.core.config import Settings
from iaai_scraper.browser.listing import ListingCollector


class _FakePage:
    def __init__(self, counts: dict[str, int]) -> None:
        self._counts = counts
        self._evaluate_result = False
        self._evaluate_values: list[object] = []

    class _Locator:
        def __init__(self, count_value: int) -> None:
            self._count_value = count_value

        def count(self) -> int:
            return self._count_value

    def locator(self, selector: str) -> "_FakePage._Locator":
        return _FakePage._Locator(self._counts.get(selector, 0))

    def evaluate(self, _script: str):
        if self._evaluate_values:
            return self._evaluate_values.pop(0)
        return self._evaluate_result


class TestListingUnit(unittest.TestCase):
    def test_has_next_page_true_for_known_selector(self) -> None:
        page = _FakePage({"a[aria-label*='Next']": 1})
        self.assertTrue(ListingCollector._has_next_page(page))

    def test_has_next_page_false_when_no_selectors(self) -> None:
        page = _FakePage({})
        self.assertFalse(ListingCollector._has_next_page(page))

    def test_has_next_page_true_for_numeric_pagination_fallback(self) -> None:
        page = _FakePage({})
        page._evaluate_result = True
        self.assertTrue(ListingCollector._has_next_page(page))

    def test_get_current_page_number_from_text_counter(self) -> None:
        page = _FakePage({})
        page._evaluate_values = [5]
        self.assertEqual(ListingCollector._get_current_page_number(page), 5)

    def test_extract_vehicle_links_from_html_finds_detail_urls(self) -> None:
        collector = ListingCollector(Settings(), HumanPacer(Settings()))
        html = """
        <div>
            <h4><a href=\"/VehicleDetail/45184893~US\">Car 1</a></h4>
            <script>window.__data = {\"href\":\"\\/VehicleDetail\\/45171480~US\"}</script>
        </div>
        """

        links = collector._extract_vehicle_links_from_html(html)

        self.assertEqual(
            links,
            [
                ("https://www.iaai.com/VehicleDetail/45184893~US", "45184893"),
                ("https://www.iaai.com/VehicleDetail/45171480~US", "45171480"),
            ],
        )


if __name__ == "__main__":
    unittest.main()