from starlette import TestClient
from starlette.staticfiles import StaticFile, StaticFiles
import os
import pytest


def test_staticfile(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFile(path=path)
    client = TestClient(app)
    response = client.get("/")
    assert response.status_code == 200
    assert response.text == '<file content>'


def test_staticfile_post(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFile(path=path)
    client = TestClient(app)
    response = client.post("/")
    assert response.status_code == 406
    assert response.text == 'Method not allowed'


def test_staticfile_with_directory_raises_error(tmpdir):
    app = StaticFile(path=tmpdir)
    client = TestClient(app)
    with pytest.raises(RuntimeError) as exc:
        response = client.get("/")
    assert 'is not a file' in str(exc)


def test_staticfile_with_missing_file_raises_error(tmpdir):
    path = os.path.join(tmpdir, '404.txt')
    app = StaticFile(path=path)
    client = TestClient(app)
    with pytest.raises(RuntimeError) as exc:
        response = client.get("/")
    assert 'does not exist' in str(exc)


def test_staticfiles(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFiles(directory=tmpdir)
    client = TestClient(app)
    response = client.get("/example.txt")
    assert response.status_code == 200
    assert response.text == '<file content>'


def test_staticfiles_post(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFiles(directory=tmpdir)
    client = TestClient(app)
    response = client.post("/example.txt")
    assert response.status_code == 406
    assert response.text == 'Method not allowed'


def test_staticfiles_with_directory_returns_404(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFiles(directory=tmpdir)
    client = TestClient(app)
    response = client.get("/")
    assert response.status_code == 404
    assert response.text == 'Not found'


def test_staticfiles_with_missing_file_returns_404(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFiles(directory=tmpdir)
    client = TestClient(app)
    response = client.get("/404.txt")
    assert response.status_code == 404
    assert response.text == 'Not found'


def test_staticfiles_configured_with_missing_directory(tmpdir):
    path = os.path.join(tmpdir, "no_such_directory")
    app = StaticFiles(directory=path)
    client = TestClient(app)
    with pytest.raises(RuntimeError) as exc:
        response = client.get("/example.txt")
    assert 'does not exist' in str(exc)


def test_staticfiles_configured_with_file_instead_of_directory(tmpdir):
    path = os.path.join(tmpdir, "example.txt")
    with open(path, "w") as file:
        file.write("<file content>")

    app = StaticFiles(directory=path)
    client = TestClient(app)
    with pytest.raises(RuntimeError) as exc:
        response = client.get("/example.txt")
    assert 'is not a directory' in str(exc)


def test_staticfiles_config_check_occurs_only_once(tmpdir):
    app = StaticFiles(directory=tmpdir)
    client = TestClient(app)
    assert not app.config_checked
    response = client.get("/")
    assert app.config_checked
    response = client.get("/")
    assert app.config_checked