"""Tests for Dockerfile npm install line.

Covers issue #98 acceptance criteria:
- ``Dockerfile`` no longer installs ``@mathew-cf/opencode-memory`` — the
  plugin was replaced by 5 TS tools (``.opencode/tools/memory-*.ts``) that
  call ``python3 -m src.memory`` directly (PR #101). The npm package is
  dead weight in the image and is removed from the global install step.
- ``opencode-ai`` and ``repomix`` remain (regression guard — must not be
  dropped when editing the install line).

Checks are raw-text grep assertions (no Docker build needed), mirroring the
belt-and-suspenders style of ``test_docker_compose.py``.
"""

from pathlib import Path

REPO_ROOT = Path(__file__).resolve().parent.parent
DOCKERFILE = REPO_ROOT / "Dockerfile"

REMOVED_PLUGIN = "@mathew-cf/opencode-memory"
KEPT_PACKAGES = ("opencode-ai", "repomix")
OPENCODE_AI = "opencode-ai"


def _dockerfile_text() -> str:
    """Read Dockerfile text (asserts the file exists)."""
    assert DOCKERFILE.exists(), f"Dockerfile missing: {DOCKERFILE}"
    return DOCKERFILE.read_text()


def _npm_install_lines(text: str) -> list[str]:
    """Return every ``npm install -g ...`` line from the Dockerfile."""
    return [line for line in text.splitlines() if "npm install -g" in line]


# ── file exists ─────────────────────────────────────────────────────────────


def test_dockerfile_exists():
    """Dockerfile exists at repo root."""
    assert DOCKERFILE.exists(), f"Dockerfile missing: {DOCKERFILE}"


# ── @mathew-cf/opencode-memory removed (issue #98 — plugin replaced by TS tools)


def test_memory_plugin_removed_from_npm_install():
    """Dockerfile does NOT install ``@mathew-cf/opencode-memory`` via ``npm install -g``.

    The plugin was replaced by 5 TS tools (PR #101) that call
    ``python3 -m src.memory`` directly — the npm package is no longer needed
    inside the container and is removed from the global install step.
    """
    lines = _npm_install_lines(_dockerfile_text())
    assert lines, "no `npm install -g` line found in Dockerfile"
    assert not any(REMOVED_PLUGIN in line for line in lines), (
        f"Dockerfile must NOT install {REMOVED_PLUGIN!r} via `npm install -g` — "
        "plugin replaced by TS tools (PR #101, cleanup issue #98)"
    )


def test_memory_plugin_removed_from_npm_install_raw():
    """Raw text check: the Dockerfile does NOT contain ``@mathew-cf/opencode-memory``.

    Belt-and-suspenders alongside the parsed check — catches any lingering
    reference to the removed plugin (multi-line install, comment, etc.).
    """
    assert REMOVED_PLUGIN not in _dockerfile_text(), (
        f"Dockerfile must NOT contain {REMOVED_PLUGIN!r} — plugin replaced by "
        "TS tools (PR #101, cleanup issue #98)"
    )


# ── opencode-ai still present (regression — must not drop the main package) ──


def test_opencode_ai_present():
    """Dockerfile still installs ``opencode-ai`` (regression guard).

    Removing the memory plugin from the npm install line must not
    accidentally drop the primary ``opencode-ai`` package.
    """
    lines = _npm_install_lines(_dockerfile_text())
    assert lines, "no `npm install -g` line found in Dockerfile"
    assert any(OPENCODE_AI in line for line in lines), (
        f"Dockerfile must still install {OPENCODE_AI!r} — dropping it breaks "
        "the container entrypoint"
    )


def test_opencode_ai_present_raw():
    """Raw text check: the Dockerfile contains ``opencode-ai``."""
    assert OPENCODE_AI in _dockerfile_text(), f"Dockerfile must still contain {OPENCODE_AI!r}"


# ── single npm install line holds the kept packages ──────────────────────────


def test_single_npm_install_line_has_kept_packages():
    """One ``npm install -g`` line installs all kept packages.

    Guards against splitting the install across multiple RUN layers (which
    would waste image layers and obscure which package is missing).
    """
    lines = _npm_install_lines(_dockerfile_text())
    install_lines = [line for line in lines if OPENCODE_AI in line]
    assert install_lines, f"no `npm install -g` line with {OPENCODE_AI!r}"
    main_line = install_lines[0]
    for pkg in KEPT_PACKAGES:
        assert pkg in main_line, (
            f"package {pkg!r} missing from the opencode-ai npm install line: {main_line!r}"
        )


if __name__ == "__main__":
    import pytest

    pytest.main([__file__, "-v"])