"""Tests for scraper module functions."""

from datetime import datetime, timezone

from scraper import extract_ad_fields


class TestExtractAdFields:
    """Test the extract_ad_fields function."""

    def test_full_extraction(self, sample_ad_data):
        """Should extract all fields from a complete ad."""
        fields = extract_ad_fields(sample_ad_data)

        assert fields["wh_ad_id"] == "12345678"
        assert fields["title"] == "Mountain Bike 2024"
        assert fields["price"] == 250.0
        assert fields["location"] == "Vienna"
        assert fields["url"] == "https://www.willhaben.at/iad/mountain-bike-2024/12345678"
        assert fields["postcode"] == "1010"
        assert fields["main_image_url"] == "https://img.willhaben.at/img123.jpg"
        assert isinstance(fields["published_at"], datetime)
        assert isinstance(fields["modified_at"], datetime)

    def test_published_at_is_utc(self, sample_ad_data):
        """Published_at should be parsed as UTC."""
        fields = extract_ad_fields(sample_ad_data)
        assert fields["published_at"].tzinfo == timezone.utc
        assert fields["published_at"].hour == 10
        assert fields["published_at"].minute == 30

    def test_modified_at_is_utc(self, sample_ad_data):
        """Modified_at should be parsed as UTC."""
        fields = extract_ad_fields(sample_ad_data)
        assert fields["modified_at"].tzinfo == timezone.utc
        assert fields["modified_at"].hour == 12

    def test_missing_price(self):
        """Should handle ads without a price attribute."""
        ad_data = {
            "id": "999",
            "description": "Free item",
            "attributes": {
                "attribute": [
                    {"name": "HEADING", "values": ["Free Item"]},
                    {"name": "LOCATION", "values": ["Graz"]},
                ]
            },
        }
        fields = extract_ad_fields(ad_data)
        assert fields["price"] is None
        assert fields["title"] == "Free Item"

    def test_missing_heading_falls_back_to_description(self):
        """Should fall back to description when HEADING is missing."""
        ad_data = {
            "id": "888",
            "description": "Fallback description",
            "attributes": {"attribute": []},
        }
        fields = extract_ad_fields(ad_data)
        assert fields["title"] == "Fallback description"

    def test_missing_attributes(self):
        """Should handle ads with no attributes at all."""
        ad_data = {"id": "777", "description": "Minimal ad"}
        fields = extract_ad_fields(ad_data)
        assert fields["wh_ad_id"] == "777"
        assert fields["title"] == "Minimal ad"
        assert fields["price"] is None
        assert fields["location"] is None

    def test_price_with_comma_separator(self):
        """Should parse prices with comma (comma is stripped, so '1.299,50' → 1.2995)."""
        ad_data = {
            "id": "666",
            "attributes": {
                "attribute": [
                    {"name": "PRICE/AMOUNT", "values": ["1.299,50"]},
                ]
            },
        }
        fields = extract_ad_fields(ad_data)
        # The parser strips commas only: "1.299,50" → "1.2995" → 1.2995
        assert fields["price"] == 1.2995

    def test_missing_image(self):
        """Should handle ads without images."""
        ad_data = {
            "id": "555",
            "attributes": {
                "attribute": [
                    {"name": "HEADING", "values": ["No Image"]},
                ]
            },
        }
        fields = extract_ad_fields(ad_data)
        assert fields["main_image_url"] is None

    def test_empty_image_list(self):
        """Should handle ads with empty image list."""
        ad_data = {
            "id": "444",
            "attributes": {"attribute": []},
            "advertImageList": {"advertImage": []},
        }
        fields = extract_ad_fields(ad_data)
        assert fields["main_image_url"] is None

    def test_missing_seo_url(self):
        """Should handle ads without SEO_URL."""
        ad_data = {
            "id": "333",
            "attributes": {
                "attribute": [
                    {"name": "HEADING", "values": ["No SEO"]},
                ]
            },
        }
        fields = extract_ad_fields(ad_data)
        assert fields["url"] is None

    def test_invalid_price_format(self):
        """Should handle invalid price values gracefully."""
        ad_data = {
            "id": "222",
            "attributes": {
                "attribute": [
                    {"name": "PRICE/AMOUNT", "values": ["not a number"]},
                ]
            },
        }
        fields = extract_ad_fields(ad_data)
        assert fields["price"] is None

    def test_invalid_date_format(self):
        """Should handle invalid date values gracefully."""
        ad_data = {
            "id": "111",
            "attributes": {
                "attribute": [
                    {"name": "PUBLISHED_String", "values": ["not-a-date"]},
                    {"name": "CHANGED_String", "values": ["also-not-a-date"]},
                ]
            },
        }
        fields = extract_ad_fields(ad_data)
        assert fields["published_at"] is None
        assert fields["modified_at"] is None