import subprocess
from pathlib import Path

import pytest

from app.services.git_service import GitService


def run_git(cwd: Path, *args: str) -> str:
    result = subprocess.run(["git", *args], cwd=cwd, capture_output=True, text=True, check=True)
    return result.stdout.strip()


def commit_file(cwd: Path, relative_path: str, content: str, message: str) -> None:
    target = cwd / relative_path
    target.parent.mkdir(parents=True, exist_ok=True)
    target.write_text(content, encoding="utf-8")
    run_git(cwd, "add", ".")
    run_git(cwd, "-c", "user.name=Test", "-c", "user.email=test@example.com", "commit", "-m", message)


@pytest.fixture
def git_fixture(tmp_path: Path):
    remote = tmp_path / "remote.git"
    local = tmp_path / "local"
    seed = tmp_path / "seed"
    remote.mkdir()
    local.mkdir()
    seed.mkdir()
    run_git(remote, "init", "--bare", "-b", "main")
    run_git(seed, "init", "-b", "main")
    commit_file(seed, "docs/one.md", "one", "initial")
    commit_file(seed, "other.txt", "other", "other")
    run_git(seed, "remote", "add", "origin", str(remote))
    run_git(seed, "push", "-u", "origin", "main")
    run_git(local, "clone", "-b", "main", str(remote), ".")
    return remote, local, seed


@pytest.mark.asyncio
async def test_directory_push_only_changes_selected_directory(git_fixture):
    remote, local, _ = git_fixture
    service = GitService()
    (local / "docs/one.md").write_text("updated", encoding="utf-8")
    (local / "other.txt").write_text("local-only", encoding="utf-8")

    ok, message = await service.push(local, str(remote), sub_path="docs")

    assert ok, message
    assert run_git(local, "remote", "get-url", "origin") == str(remote)
    check = Path(local.parent / "check")
    run_git(local.parent, "clone", "-b", "main", str(remote), str(check))
    assert (check / "docs/one.md").read_text(encoding="utf-8") == "updated"
    assert (check / "other.txt").read_text(encoding="utf-8") == "other"


@pytest.mark.asyncio
async def test_whole_push_rejects_remote_ahead(git_fixture):
    remote, local, seed = git_fixture
    service = GitService()
    commit_file(seed, "other.txt", "remote-update", "remote update")
    run_git(seed, "push", "origin", "main")
    (local / "docs/one.md").write_text("local-update", encoding="utf-8")

    ok, message = await service.push(local, str(remote))

    assert not ok
    assert "先执行整库拉取" in message


@pytest.mark.asyncio
async def test_credentials_are_not_written_to_remote_url(git_fixture):
    remote, local, _ = git_fixture
    service = GitService()
    ok, message = await service.pull(local, str(remote), username="user", token="secret")

    assert ok, message
    assert "secret" not in run_git(local, "remote", "get-url", "origin")