"""Tests for Git parser and candidate selection."""

import os
from pathlib import Path

import pytest

from app.dataset.git_parser import score_commit, select_candidates


def _make_repo(tmp_path: Path) -> str:
    repo = tmp_path / "repo"
    repo.mkdir()
    os.system(
        f'cd {repo} && git init -q && git config user.email "test@example.com" && git config user.name "Test"'
    )
    (repo / "main.py").write_text("print('hello')\n")
    os.system(f'cd {repo} && git add . && git commit -q -m "init"')
    (repo / "main.py").write_text("print('world')\n")
    os.system(f'cd {repo} && git add . && git commit -q -m "update main"')
    (repo / "app.java").write_text("class App {}\n")
    os.system(f'cd {repo} && git add . && git commit -q -m "add java app"')
    return str(repo)


def test_score_commit_prefers_message_and_size(tmp_path):
    repo = _make_repo(tmp_path)
    from app.dataset.git_parser import list_commits

    commits = list_commits(repo)
    assert len(commits) >= 2
    scores = [score_commit(c) for c in commits]
    assert all(0 <= s <= 1 for s in scores)


def test_select_candidates(tmp_path):
    repo = _make_repo(tmp_path)
    candidates = select_candidates(repo, count=2, languages=["python", "java"])
    assert len(candidates) <= 2
    assert all(c.repo == "repo" for c in candidates)