"""Contract tests for article-input.schema.json evaluated against all 20 reference units."""

from __future__ import annotations

import json
from pathlib import Path

import jsonschema

from src.runtime.core.config import create_schema_registry, load_schema


def test_article_input_schema_against_all_20_reference_units():
    schema = load_schema("article-input.schema.json")
    registry = create_schema_registry()
    validator = jsonschema.Draft202012Validator(schema, registry=registry)

    ref_dir = Path("evals/reference_20")
    article_files = sorted(ref_dir.glob("article_*.json"))
    assert len(article_files) == 20, f"Expected 20 reference unit files, found {len(article_files)}"

    for art_file in article_files:
        data = json.loads(art_file.read_text(encoding="utf-8"))
        errors = list(validator.iter_errors(data))
        assert len(errors) == 0, (
            f"Article {art_file.name} failed contract validation: {[e.message for e in errors]}"
        )


def test_article_input_rejects_batch_wrapper():
    schema = load_schema("article-input.schema.json")
    registry = create_schema_registry()
    validator = jsonschema.Draft202012Validator(schema, registry=registry)

    # Batch wrapper containing "articles" key must fail contract validation
    batch_data = {
        "articles": [
            {"source_url": "https://example.com/1"},
            {"source_url": "https://example.com/2"},
        ]
    }
    errors = list(validator.iter_errors(batch_data))
    assert len(errors) > 0, (
        "Batch wrapper containing 'articles' key must be rejected by contract schema"
    )