"""Regression tests for SEA-aware detection in uclaude_updater.py.

Background: before this fix, find_cli_js() searched ONLY for `cli.js`
files. After upstream switched to SEA layout (v2.1.114+), `cli.js` no
longer exists — there's only `bin/claude.exe`. As a result:
  - find_cli_js() returned None
  - get_installed_version() returned (None, None)
  - is_patched() returned (False, [3 markers]) — false negative
  - cmd_check showed "Claude Code: not installed" right after install

These tests pin down the SEA-aware behaviour so it cannot regress.
"""
from __future__ import annotations

import importlib.util
import json
import os
import sys
from pathlib import Path
from unittest.mock import patch as mock_patch

ROOT = Path(__file__).resolve().parent.parent
spec = importlib.util.spec_from_file_location(
    "uclaude_updater", ROOT / "uclaude_updater.py"
)
uu = importlib.util.module_from_spec(spec)
sys.modules["uclaude_updater"] = uu
spec.loader.exec_module(uu)


def _make_sea_install(npm_root: Path, version: str = "2.1.119",
                      patched: bool = True, nested: bool = False) -> Path:
    """Create a fake SEA install layout under npm_root.

    nested=True → also nest a copy under
       npm_root/@anthropic-ai/claude-code/node_modules/@anthropic-ai/claude-code/
    matching how npm SEA wrapper packages get unpacked.
    """
    pkg = npm_root / "@anthropic-ai" / "claude-code"
    if nested:
        pkg = pkg / "node_modules" / "@anthropic-ai" / "claude-code"
    bin_dir = pkg / "bin"
    bin_dir.mkdir(parents=True)
    payload = b"\x7fELF" + (b"X" * 4096)
    if patched:
        payload += b"/*ae1_models_filter_patched*/" + (b"Y" * 1024)
        payload += b"/*bypass_permissions_prompt*/" + (b"Z" * 512)
    binary = bin_dir / "claude.exe"
    binary.write_bytes(payload)
    os.chmod(binary, 0o755)
    (pkg / "cli-wrapper.cjs").write_text("// wrapper\n")
    (pkg / "package.json").write_text(json.dumps({"version": version}))
    return binary


def test_find_claude_artifact_finds_sea_binary(tmp_path):
    """SEA install: bin/claude.exe must be discovered when no cli.js."""
    npm_root = tmp_path / "npm_global"
    npm_root.mkdir()
    binary = _make_sea_install(npm_root)
    with mock_patch("subprocess.run") as mrun:
        mrun.return_value = type("R", (), {
            "returncode": 0, "stdout": str(npm_root), "stderr": "",
        })()
        with mock_patch("os.path.isfile", side_effect=lambda p: Path(p).is_file()):
            with mock_patch.object(uu, "IS_WINDOWS", False):
                got = uu.find_claude_artifact()
    assert got is not None
    assert Path(got).name == "claude.exe"


def test_find_claude_artifact_finds_nested_sea(tmp_path):
    """Nested layout: @anthropic-ai/claude-code/node_modules/@anthropic-ai/claude-code/bin/claude.exe"""
    npm_root = tmp_path / "npm_global"
    npm_root.mkdir()
    binary = _make_sea_install(npm_root, nested=True)
    with mock_patch("subprocess.run") as mrun:
        # which claude → realpath returns the nested binary
        def _run(cmd, **kw):
            class R: pass
            r = R()
            r.returncode = 0
            r.stderr = ""
            if cmd[:1] == ["which"]:
                r.stdout = str(binary)
            else:
                r.stdout = str(npm_root)
            return r
        mrun.side_effect = _run
        with mock_patch.object(uu, "IS_WINDOWS", False):
            got = uu.find_claude_artifact()
    assert got is not None
    assert Path(got).resolve() == binary.resolve()


def test_is_patched_sea_recognises_marker_in_binary(tmp_path):
    """SEA: is_patched scans binary as bytes, not text."""
    npm_root = tmp_path / "npm"
    npm_root.mkdir()
    binary = _make_sea_install(npm_root, patched=True)
    patched, missing = uu.is_patched(str(binary))
    assert patched is True
    assert missing == []


def test_is_patched_sea_unpatched_returns_false(tmp_path):
    """SEA without ae1/bypass markers must report not patched."""
    npm_root = tmp_path / "npm"
    npm_root.mkdir()
    binary = _make_sea_install(npm_root, patched=False)
    patched, missing = uu.is_patched(str(binary))
    assert patched is False
    # Both SEA markers should be reported missing
    assert any("ae1" in m for m in missing)
    assert any("bypass" in m for m in missing)


def test_is_patched_legacy_cli_js_still_works(tmp_path):
    """Legacy cli.js path: text-based scan unchanged."""
    cli_js = tmp_path / "cli.js"
    cli_js.write_text(
        "// __CLAUDE_SETTINGS__\n"
        "function x(){return!!(/*bypass_permissions_prompt*/false)}\n"
        "/* root check removed by patcher */\n"
    )
    patched, missing = uu.is_patched(str(cli_js))
    assert patched is True
    assert missing == []


def test_is_patched_returns_false_on_missing_file():
    patched, missing = uu.is_patched("/nonexistent/path")
    assert patched is False
    assert len(missing) > 0


def test_get_installed_version_sea_reads_package_json(tmp_path):
    """SEA: version comes from package.json next to bin/."""
    npm_root = tmp_path / "npm"
    npm_root.mkdir()
    binary = _make_sea_install(npm_root, version="2.1.119")
    with mock_patch.object(uu, "find_claude_artifact", return_value=str(binary)):
        v, p = uu.get_installed_version()
    assert v == "2.1.119"
    assert Path(p).name == "claude.exe"


def test_get_installed_version_returns_none_when_missing():
    with mock_patch.object(uu, "find_claude_artifact", return_value=None):
        v, p = uu.get_installed_version()
    assert v is None
    assert p is None


def test_find_all_cli_js_returns_sea_artifact(tmp_path):
    """Multi-install detector must also surface SEA binaries."""
    npm_root = tmp_path / "npm"
    npm_root.mkdir()
    binary = _make_sea_install(npm_root)
    with mock_patch("subprocess.run") as mrun:
        mrun.return_value = type("R", (), {
            "returncode": 0, "stdout": str(npm_root), "stderr": "",
        })()
        with mock_patch.object(uu, "IS_WINDOWS", False):
            paths = uu.find_all_cli_js()
    sea_paths = [p for p in paths if p.endswith("claude.exe")]
    assert len(sea_paths) >= 1