"""L0 测试 — COBOL 文件操作语句解析 + 数据生成验证"""

from pathlib import Path
import pytest

from cobol_testgen import extract_structure, generate_data

FIXTURES = Path(__file__).parents[3] / "test-data" / "cobol" / "statement_file"

SAMPLE_CHECKS = [
    ("ST-READ-INTO",      {"has_call": False}, True),
    ("ST-READ-AT-END",    {"has_call": False}, True),
    ("ST-WRITE-AFTER",    {"has_call": False}, True),
    ("ST-REWRITE-FROM",   {"has_call": False}, True),
    ("ST-DELETE",         {"has_call": False}, True),
    ("ST-START",          {"has_call": False}, True),
]


@pytest.mark.parametrize("name,expected,expect_data", SAMPLE_CHECKS,
                         ids=[c[0] for c in SAMPLE_CHECKS])
def test_file_statement(name, expected, expect_data):
    path = FIXTURES / f"{name}.cbl"
    assert path.exists(), f"Missing sample: {path}"
    source = path.read_text("utf-8")

    struct = extract_structure(source)
    assert struct is not None

    for key, val in expected.items():
        assert struct.get(key) == val, f"{name}: expected {key}={val}, got {struct.get(key)}"

    if expect_data:
        data = generate_data(source, struct)
        if data is not None:
            pass  # file programs may produce 0 data records due to external file deps