"""Keyless runtime-resolution tests; launch coverage lives in test_bundled_runtime.py."""

from __future__ import annotations

import os
import subprocess
import sys
from pathlib import Path
from types import SimpleNamespace

import deepseek_harness_runtime as runtime
import pytest

from deepseek_harness_runtime import (
    RUNTIME_MODE_ENV_VAR,
    bundled_package_dir,
    main,
    resolve_bundled_launch_args,
)


def test_unknown_explicit_mode_fails_loud() -> None:
    with pytest.raises(ValueError, match="expected 'exe' or 'node'"):
        resolve_bundled_launch_args("bogus")


def test_unknown_env_mode_fails_loud(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setenv(RUNTIME_MODE_ENV_VAR, "bogus")
    with pytest.raises(ValueError, match="expected 'exe' or 'node'"):
        resolve_bundled_launch_args()


def test_explicit_mode_wins_over_env_mode(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setenv(RUNTIME_MODE_ENV_VAR, "bogus")
    try:
        args = resolve_bundled_launch_args("exe")
    except FileNotFoundError:
        return  # explicit 'exe' was honored; only the artifact is missing
    assert args[0].endswith(("-x64", "-arm64"))


def test_runtime_requires_spawn_helper_only_on_macos(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    runtime_dir = tmp_path / "runtime"
    runtime_dir.mkdir()
    linux = runtime_dir / "deepseek-harness-sdk-runtime-linux-x64"
    linux.touch()
    Path(f"{linux}-rg").touch()
    macos = runtime_dir / "deepseek-harness-sdk-runtime-macos-arm64"
    macos.touch()
    Path(f"{macos}-rg").touch()
    monkeypatch.setattr(runtime, "bundled_package_dir", lambda: tmp_path)

    monkeypatch.setattr(runtime, "_current_platform_tag", lambda: "macos-arm64")
    with pytest.raises(FileNotFoundError, match="node-pty spawn helper"):
        runtime.bundled_runtime_path()
    monkeypatch.setattr(runtime, "_current_platform_tag", lambda: "linux-x64")
    assert runtime.bundled_runtime_path() == linux


def test_windows_runtime_uses_exe_payload_and_exe_sidecar(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    runtime_dir = tmp_path / "runtime"
    runtime_dir.mkdir()
    executable = runtime_dir / "deepseek-harness-sdk-runtime-win-x64.exe"
    executable.touch()
    (runtime_dir / "deepseek-harness-sdk-runtime-win-x64-rg.exe").touch()
    monkeypatch.setattr(runtime, "bundled_package_dir", lambda: tmp_path)
    monkeypatch.setattr(runtime, "_current_platform_tag", lambda: "win-x64")

    assert runtime.bundled_runtime_path() == executable


def test_current_platform_supports_windows_x64_only(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr(runtime.sys, "platform", "win32")
    monkeypatch.setattr(runtime.platform, "machine", lambda: "AMD64")
    assert runtime._current_platform_tag() == "win-x64"

    monkeypatch.setattr(runtime.platform, "machine", lambda: "ARM64")
    with pytest.raises(FileNotFoundError, match="Windows x64"):
        runtime._current_platform_tag()


def test_current_platform_supports_macos_x64(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr(runtime.sys, "platform", "darwin")
    monkeypatch.setattr(runtime.platform, "machine", lambda: "x86_64")

    assert runtime._current_platform_tag() == "macos-x64"


def test_runtime_requires_ripgrep_sidecar(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    runtime_dir = tmp_path / "runtime"
    runtime_dir.mkdir()
    (runtime_dir / "deepseek-harness-sdk-runtime-linux-x64").touch()
    monkeypatch.setattr(runtime, "bundled_package_dir", lambda: tmp_path)
    monkeypatch.setattr(runtime, "_current_platform_tag", lambda: "linux-x64")

    with pytest.raises(FileNotFoundError, match="ripgrep sidecar"):
        runtime.bundled_runtime_path()


def test_node_mode_runs_the_deployed_dsh_cli(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    bin_js = tmp_path / "runtime" / "node" / "node_modules" / "@deepseek-ai" / "dsh" / "lib" / "bin.js"
    bin_js.parent.mkdir(parents=True)
    bin_js.touch()
    monkeypatch.setattr(runtime, "bundled_package_dir", lambda: tmp_path)
    monkeypatch.setattr(runtime.shutil, "which", lambda _name: "/node")

    assert resolve_bundled_launch_args("node") == ("/node", str(bin_js))


def test_python_dsh_command_requires_explicit_home(
    monkeypatch: pytest.MonkeyPatch, capsys: pytest.CaptureFixture[str]
) -> None:
    monkeypatch.delenv("DSH_HOME", raising=False)

    with pytest.raises(SystemExit) as excinfo:
        main()

    assert excinfo.value.code == 2
    assert "explicit DSH_HOME" in capsys.readouterr().err


def test_python_dsh_command_executes_the_bundled_cli(
    monkeypatch: pytest.MonkeyPatch
) -> None:
    called: dict[str, object] = {}
    monkeypatch.setenv("DSH_HOME", "/explicit/home")
    monkeypatch.setattr(runtime, "resolve_bundled_launch_args", lambda: ("/runtime",))
    monkeypatch.setattr(runtime, "sys", SimpleNamespace(platform="linux", argv=["dsh", "plugin", "--profile", "sdk", "list"]))

    def execvpe(file: str, args: tuple[str, ...], env: dict[str, str]) -> None:
        called.update(file=file, args=args, home=env.get("DSH_HOME"))

    monkeypatch.setattr(runtime.os, "execvpe", execvpe)

    main()

    assert called == {
        "file": "/runtime",
        "args": ("/runtime", "plugin", "--profile", "sdk", "list"),
        "home": "/explicit/home",
    }


@pytest.mark.parametrize("returncode", [0, 37, 513])
def test_windows_console_waits_and_forwards_runtime_status(monkeypatch: pytest.MonkeyPatch, returncode: int) -> None:
    monkeypatch.setenv("DSH_HOME", "/explicit/home")
    monkeypatch.setattr(runtime, "sys", SimpleNamespace(platform="win32", argv=["dsh", "plugin", "argument with spaces", "中文"]))
    monkeypatch.setattr(runtime, "resolve_bundled_launch_args", lambda: ("runtime.exe",))
    called = []

    def run(args: tuple[str, ...], **kwargs: object) -> subprocess.CompletedProcess[str]:
        called.append((args, kwargs))
        return subprocess.CompletedProcess(args, returncode)

    def forbidden_exec(*args: object) -> None:
        pytest.fail("Windows console must wait instead of entering CRT exec")

    monkeypatch.setattr(subprocess, "run", run)
    monkeypatch.setattr(runtime.os, "execvpe", forbidden_exec)
    with pytest.raises(SystemExit) as result:
        main()
    assert result.value.code == returncode
    assert called == [(("runtime.exe", "plugin", "argument with spaces", "中文"), {"env": os.environ})]


@pytest.mark.parametrize("returncode", [0, 37, pytest.param(513, marks=pytest.mark.skipif(sys.platform != "win32", reason="POSIX truncates process exit codes to eight bits"))])
def test_windows_console_branch_preserves_real_child_io_and_completion(tmp_path: Path, returncode: int) -> None:
    child = tmp_path / "child with spaces.py"
    sentinel = tmp_path / "finished"
    child.write_text(
        "import pathlib,sys\n"
        "assert sys.argv[1] == 'argument with spaces'\n"
        "assert sys.argv[2] == '中文'\n"
        "print('stdout-中文', flush=True)\n"
        "print('stderr-中文', file=sys.stderr, flush=True)\n"
        f"pathlib.Path({str(sentinel)!r}).write_text('done')\n"
        f"raise SystemExit({returncode})\n", encoding="utf-8",
    )
    driver = (
        "import deepseek_harness_runtime as runtime; from types import SimpleNamespace; "
        f"runtime.sys = SimpleNamespace(platform='win32', argv=['dsh', 'argument with spaces', '中文']); "
        f"runtime.resolve_bundled_launch_args = lambda: ({sys.executable!r}, {str(child)!r}); runtime.main()"
    )
    result = subprocess.run([sys.executable, "-c", driver], capture_output=True, text=True, encoding="utf-8",
                            env={**os.environ, "DSH_HOME": str(tmp_path), "PYTHONIOENCODING": "utf-8"}, timeout=15)
    assert result.returncode == returncode, result.stderr
    assert result.stdout == "stdout-中文\n"
    assert result.stderr == "stderr-中文\n"
    assert sentinel.read_text() == "done"