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"
    if execute.os.name == "nt":
        config_index = invocation["command"].index("-c")
        assert invocation["command"][config_index + 1] == 'windows.sandbox="unelevated"'


def test_run_git_decodes_output_as_utf8(tmp_path, monkeypatch):
    invocation = {}

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

    monkeypatch.setattr(execute.subprocess, "run", capture_run)
    executor = object.__new__(execute.StepExecutor)
    executor._root = str(tmp_path)

    executor._run_git("status", "--short")

    assert invocation["kwargs"]["encoding"] == "utf-8"


def test_feature_commit_message_is_windows_console_safe():
    message = execute.StepExecutor.FEAT_MSG.format(
        phase="linear-static-3d-euler-beam", num=0, name="requirements-baseline"
    )

    message.encode("cp949")


def test_configure_utf8_stdio_reconfigures_both_streams(monkeypatch):
    class ReconfigurableStream:
        def __init__(self):
            self.encodings = []

        def reconfigure(self, *, encoding):
            self.encodings.append(encoding)

    stdout = ReconfigurableStream()
    stderr = ReconfigurableStream()
    monkeypatch.setattr(execute.sys, "stdout", stdout)
    monkeypatch.setattr(execute.sys, "stderr", stderr)

    execute._configure_utf8_stdio()

    assert stdout.encodings == ["utf-8"]
    assert stderr.encodings == ["utf-8"]