import os
import pytest


def test_settings_load_from_env(monkeypatch):
    monkeypatch.setenv("DATABASE_URL", "postgresql+asyncpg://u:p@localhost/db")
    monkeypatch.setenv("S3_ENDPOINT_URL", "http://localhost:9000")
    monkeypatch.setenv("S3_BUCKET_NAME", "test-bucket")
    monkeypatch.setenv("S3_ACCESS_KEY_ID", "key")
    monkeypatch.setenv("S3_SECRET_ACCESS_KEY", "secret")
    monkeypatch.setenv("S3_REGION", "us-east-1")
    monkeypatch.setenv("API_BASE_URL", "http://localhost:8000")

    # Import inside test to pick up monkeypatched env
    import importlib
    import app.config as config_module
    importlib.reload(config_module)

    s = config_module.Settings()
    assert s.database_url == "postgresql+asyncpg://u:p@localhost/db"
    assert s.s3_bucket_name == "test-bucket"
    assert s.max_upload_bytes == 52428800  # default


def test_settings_max_upload_bytes_override(monkeypatch):
    monkeypatch.setenv("DATABASE_URL", "postgresql+asyncpg://u:p@localhost/db")
    monkeypatch.setenv("S3_ENDPOINT_URL", "http://localhost:9000")
    monkeypatch.setenv("S3_BUCKET_NAME", "test-bucket")
    monkeypatch.setenv("S3_ACCESS_KEY_ID", "key")
    monkeypatch.setenv("S3_SECRET_ACCESS_KEY", "secret")
    monkeypatch.setenv("S3_REGION", "us-east-1")
    monkeypatch.setenv("API_BASE_URL", "http://localhost:8000")
    monkeypatch.setenv("MAX_UPLOAD_BYTES", "10485760")

    import importlib
    import app.config as config_module
    importlib.reload(config_module)

    s = config_module.Settings()
    assert s.max_upload_bytes == 10485760