import os
import shlex
import shutil
import subprocess
import sys
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[1]


@pytest.mark.parametrize(
    ("configured_port", "environment_port", "argument_port", "expected_port"),
    [
        (None, None, None, "8000"),
        ("8002", None, None, "8002"),
        ("8123", None, None, "8123"),
        ("8002", "8124", None, "8124"),
        ("8002", "8124", "8125", "8125"),
    ],
)
def test_dev_uses_the_same_backend_port_for_both_servers(
    tmp_path: Path,
    configured_port: str | None,
    environment_port: str | None,
    argument_port: str | None,
    expected_port: str,
):
    shutil.copyfile(ROOT / "Makefile", tmp_path / "Makefile")
    secret = "fixture-secret-must-not-be-exported-or-printed"
    config = f"AI_PLATFORM_OPENAI_API_KEY={secret}\n"
    if configured_port is not None:
        config += f'BACKEND_PORT="{configured_port}"\n'
    (tmp_path / ".env").write_text(config)
    # Only the port lookup executes during dry-run; bypass uv project discovery in this fixture.
    uv = tmp_path / "uv"
    uv.write_text(f'#!/bin/sh\nshift 3\nexec {shlex.quote(sys.executable)} "$@"\n')
    uv.chmod(0o700)
    environment = os.environ.copy()
    for name in ("BACKEND_PORT", "MAKEFLAGS", "MFLAGS", "MAKEOVERRIDES"):
        environment.pop(name, None)
    environment["PATH"] = f"{tmp_path}{os.pathsep}{environment['PATH']}"
    if environment_port is not None:
        environment["BACKEND_PORT"] = environment_port
    command = ["make", "--dry-run", "dev"]
    if argument_port is not None:
        command.append(f"BACKEND_PORT={argument_port}")
    result = subprocess.run(
        command,
        cwd=tmp_path,
        env=environment,
        text=True,
        capture_output=True,
        check=False,
        timeout=30,
    )
    assert result.returncode == 0, result.stderr
    assert f"--port {expected_port}" in result.stdout
    assert f"BACKEND_INTERNAL_URL=http://127.0.0.1:{expected_port} bun" in result.stdout
    assert "docker compose up -d --wait postgres" in result.stdout
    assert "alembic" not in result.stdout
    assert secret not in result.stdout + result.stderr
    assert "AI_PLATFORM_OPENAI_API_KEY" not in result.stdout + result.stderr