# tests/test_parse.py
import json
from pathlib import Path

from fractus_vorax.compiler.parse import detect_format, flatten_record, parse_file


def _write(tmp_path, name, content):
    p = tmp_path / name
    p.write_text(content, encoding="utf-8")
    return p


def test_detect_format(tmp_path):
    assert detect_format(_write(tmp_path, "a.csv", "x\n1")) == "csv"
    assert detect_format(_write(tmp_path, "a.tsv", "x\n1")) == "tsv"
    assert detect_format(_write(tmp_path, "a.jsonl", "{}")) == "jsonl"
    assert detect_format(_write(tmp_path, "a.json", "[]")) == "json"
    assert detect_format(_write(tmp_path, "a.md", "# t")) == "md"
    assert detect_format(_write(tmp_path, "a.txt", "hi")) == "txt"
    assert detect_format(_write(tmp_path, "a.xyz", "hi")) == "raw"


def test_parse_csv_two_columns_is_qa(tmp_path):
    p = _write(tmp_path, "cap.csv", "question,answer\nwhat is the capital of france,paris\nwho wrote hamlet,william shakespeare\n")
    atoms = parse_file(p)
    assert len(atoms) == 2
    assert atoms[0].statement == "what is the capital of france"
    assert atoms[0].context == "paris"
    assert atoms[0].provenance.startswith("cap.csv")
    assert atoms[0].confidence == 1.0


def test_parse_csv_wide_table_serializes_pairs(tmp_path):
    p = _write(tmp_path, "rows.csv", "name,city,height\neiffel,paris,330\n")
    atoms = parse_file(p)
    assert len(atoms) == 1
    assert "name: eiffel" in atoms[0].statement
    assert "city: paris" in atoms[0].statement


def test_parse_jsonl(tmp_path):
    line = json.dumps({"name": "eiffel tower", "city": "paris", "height_m": 330})
    p = _write(tmp_path, "d.jsonl", line + "\n")
    atoms = parse_file(p)
    assert len(atoms) == 1
    assert "name: eiffel tower" in atoms[0].statement
    assert "height_m: 330" in atoms[0].statement


def test_parse_json_list(tmp_path):
    p = _write(tmp_path, "d.json", json.dumps([{"a": 1}, {"b": 2}]))
    atoms = parse_file(p)
    assert len(atoms) == 2


def test_flatten_record_nested():
    pairs = flatten_record({"x": {"y": "z"}, "l": [1, 2]})
    assert "x.y: z" in pairs
    assert "l: 1; 2" in pairs


def test_parse_txt_paragraphs(tmp_path):
    p = _write(tmp_path, "doc.txt", "Premier paragraphe sur paris.\n\nDeuxieme paragraphe.\n")
    atoms = parse_file(p)
    assert len(atoms) == 2
    assert atoms[0].statement == "Premier paragraphe sur paris."


def test_parse_md_headings_become_context(tmp_path):
    p = _write(tmp_path, "doc.md", "# Capitales\n\nparis est la capitale de la france\n")
    atoms = parse_file(p)
    assert atoms[0].context == "Capitales"
    assert "paris" in atoms[0].statement


def test_parse_raw_fallback_reads_lines(tmp_path):
    p = _write(tmp_path, "weird.xyz", "ligne une\nligne deux\n")
    atoms = parse_file(p)
    assert len(atoms) == 2


def test_parse_jsonl_skips_malformed_lines(tmp_path):
    p = _write(tmp_path, "d.jsonl", '{"a": 1}\nnot json {\n{"b": 2}\n')
    atoms = parse_file(p)
    assert len(atoms) == 2
    assert "a: 1" in atoms[0].statement
    assert "b: 2" in atoms[1].statement


def test_parse_csv_latin1_does_not_crash(tmp_path):
    p = tmp_path / "latin.csv"
    p.write_bytes(b"question,answer\ncaf\xe9,paris\n")
    atoms = parse_file(p)
    assert len(atoms) == 1
    assert atoms[0].context == "paris"