from click.testing import CliRunner
import pytest

# for integration tests
from pathlib import Path
from shutil import copyfile
from subprocess import run

from habitmove import cli


@pytest.fixture
def runner():
    return CliRunner()


# Create an isolated environment to test the output file in
@pytest.fixture
def runner_with_nomie_input(tmp_path):
    runner = CliRunner()
    fname_input_data = Path("tests/data/nomie/input.json").resolve()
    fname_target_data = Path("tests/data/loop/output.db").resolve()
    with runner.isolated_filesystem(temp_dir=tmp_path):
        copyfile(fname_input_data.resolve(), f"input.json")
        copyfile(fname_target_data.resolve(), f"target")
        yield runner


def test_cli_fails_without_file(runner):
    result = runner.invoke(cli.main)
    assert result.exit_code == 2
    assert "Missing argument" in result.output


@pytest.mark.e2e
def test_produces_output_file(runner_with_nomie_input):
    result = runner_with_nomie_input.invoke(cli.main, "input.json")
    assert result.exit_code == 0
    assert Path("output.db").exists()


@pytest.mark.e2e
def test_produces_correct_output(runner_with_nomie_input):
    runner_with_nomie_input.invoke(cli.main, "input.json")
    result = run(["sqldiff", "output.db", "target"], capture_output=True)
    assert result.stdout == b""