"""Platforms without a database (milestone 463 step 2).

Detection is pure — a catalog and a list of repo paths in, platform ids out —
so it is pinned here against fixture trees. What it writes, and what it must
never overwrite, is in tests/test_integration_platforms.py.
"""
from __future__ import annotations

from types import SimpleNamespace

from scribe.mcp.server import _READ_ONLY_TOOLS, _WRITE_TOOLS
from scribe.mcp.tools.projects import _inception_choices
from scribe.services.coverage import scan_archive
from tests.helpers import forge_tarball
from scribe.services.platforms import (
    MEMBER_STATES, SETTABLE_STATES, detect, marker_matches, members,
    validate_markers, validate_updates,
)


def _platform(pid: int, *markers: str) -> SimpleNamespace:
    return SimpleNamespace(id=pid, markers=list(markers))


# --- a single marker ----------------------------------------------------------

def test_a_bare_marker_matches_the_basename_anywhere_in_the_tree():
    assert marker_matches("go.mod", "go.mod")
    assert marker_matches("go.mod", "services/api/go.mod")
    assert marker_matches("AndroidManifest.xml", "app/src/main/AndroidManifest.xml")
    assert marker_matches("vite.config.*", "frontend/vite.config.ts")
    assert not marker_matches("go.mod", "go.mod.bak")
    assert not marker_matches("go.mod", "docs/go.mod.md")


def test_a_marker_with_a_slash_matches_the_whole_path_only():
    """A directory-shaped marker cannot be satisfied by a same-named file
    somewhere else — `.github/workflows/*` is about the repo root's CI, not
    a vendored copy of some other project's."""
    assert marker_matches(".github/workflows/*", ".github/workflows/ci.yml")
    assert not marker_matches(".github/workflows/*", "vendor/x/.github/workflows/ci.yml")
    assert not marker_matches(".github/workflows/*", "ci.yml")


def test_a_blank_marker_matches_nothing():
    assert not marker_matches("", "anything")
    assert not marker_matches("   ", "anything")


# --- detection over a tree -------------------------------------------------------

ANDROID_AND_GO = [
    "app/build.gradle.kts",
    "app/src/main/AndroidManifest.xml",
    "server/go.mod",
    "server/main.go",
    "README.md",
]


def test_detect_finds_every_platform_a_tree_carries_and_nothing_else():
    catalog = [
        _platform(1, "AndroidManifest.xml"),
        _platform(2, "go.mod"),
        _platform(3, "Cargo.toml"),
        _platform(4, ".github/workflows/*"),
    ]
    assert detect(catalog, ANDROID_AND_GO) == [1, 2]


def test_a_platform_with_no_markers_is_declare_only():
    """An empty marker list is how a platform says "a person must tell you" —
    it must not match everything, and it must not match nothing by error."""
    catalog = [_platform(1), _platform(2, "go.mod")]
    assert detect(catalog, ANDROID_AND_GO) == [2]
    assert detect([SimpleNamespace(id=9, markers=None)], ANDROID_AND_GO) == []


def test_detect_on_an_empty_tree_finds_nothing():
    assert detect([_platform(1, "go.mod")], []) == []


def test_the_archive_scan_carries_every_path_not_only_the_scannable_ones():
    """The markers that say what a project IS are mostly files the shape scan
    skips — a manifest, a go.mod, a gradle script. Detection reads the scan's
    paths, so a scan that listed only code files would detect nothing."""
    scan = scan_archive(forge_tarball({
        "app/src/main/AndroidManifest.xml": b"<manifest/>",
        "server/go.mod": b"module x\n",
        "server/main.py": b"def main():\n    pass\n",
    }))
    assert set(scan.paths) == {
        "app/src/main/AndroidManifest.xml", "server/go.mod", "server/main.py",
    }
    # The forge's wrapping directory is stripped, as it is for shapes.
    assert not any(p.startswith("widget/") for p in scan.paths)


# --- the answers a person may give -------------------------------------------------

def test_detected_is_the_refreshs_to_write_never_a_persons():
    assert "detected" in MEMBER_STATES
    assert "detected" not in SETTABLE_STATES
    assert "rejected" not in MEMBER_STATES


def test_validate_updates():
    assert validate_updates({"go": "declared", "rust": "rejected", "python": None}) is None
    assert validate_updates({}) is None
    assert "slug: state" in validate_updates(["go"])
    assert "not a state a person sets" in validate_updates({"go": "detected"})
    assert "not a state a person sets" in validate_updates({"go": "maybe"})
    assert "named by its slug" in validate_updates({"": "declared"})


def test_validate_markers():
    assert validate_markers(None) is None
    assert validate_markers(["go.mod", ".github/workflows/*"]) is None
    assert "list of glob patterns" in validate_markers("go.mod")
    assert "list of glob patterns" in validate_markers([1])
    assert "repo-relative" in validate_markers(["/etc/passwd"])


def test_members_drops_the_rejected_answers():
    rows = [
        {"id": 1, "slug": "go", "name": "Go", "state": "declared"},
        {"id": 2, "slug": "rust", "name": "Rust", "state": "rejected"},
        {"id": 3, "slug": "python", "name": "Python", "state": "detected"},
    ]
    assert [m["slug"] for m in members(rows)] == ["go", "python"]


# --- the doors ------------------------------------------------------------------------

def test_the_platform_tools_are_classified():
    assert "list_platforms" in _READ_ONLY_TOOLS
    assert "set_project_platforms" in _WRITE_TOOLS


def test_inception_choices_carry_platforms_only_when_given():
    """Left out, platforms stays UNSTATED (None after normalising) — which is
    not the same answer as an empty list, "none of them"."""
    assert "platforms" not in _inception_choices(0, True)
    assert _inception_choices(0, True, ["go"])["platforms"] == ["go"]
    assert _inception_choices(0, True, [])["platforms"] == []