import json
import subprocess

from scripts import execute


def test_invoke_codex_uses_utf8_for_unicode_prompt(tmp_path, monkeypatch):
    phase_dir = tmp_path / "phases" / "unicode-phase"
    phase_dir.mkdir(parents=True)
    (phase_dir / "index.json").write_text(
        json.dumps(
            {
                "project": "FESA Structural Solver",
                "phase": "unicode-phase",
                "steps": [{"step": 0, "name": "unicode", "status": "pending"}],
            }
        ),
        encoding="utf-8",
    )
    (phase_dir / "step0.md").write_text("Euler–Bernoulli 보", encoding="utf-8")

    invocation = {}

    def capture_run(command, **kwargs):
        invocation["command"] = command
        invocation["kwargs"] = kwargs
        return subprocess.CompletedProcess(command, 0, stdout="", stderr="")

    monkeypatch.setattr(execute, "ROOT", tmp_path)
    monkeypatch.setattr(execute.subprocess, "run", capture_run)

    executor = execute.StepExecutor("unicode-phase")
    executor._invoke_codex({"step": 0, "name": "unicode"}, "승인된 설계 – ")

    assert "Euler–Bernoulli 보" in invocation["kwargs"]["input"]
    assert invocation["kwargs"]["encoding"] == "utf-8"