#!/usr/bin/env python3
"""`reach character` decisions, exercised without launching Godot or Blender (T-1290).

The garment-QA capture step is a guarded exec (D-263); what is testable is the
plan — which config, which Godot, whether a virtual display is needed — and the
bash script's exit codes (2 for a missing config, 3 for no Godot). The GLB
strip is pure bytes, so it gets a synthetic GLB with real utility nodes.

Run: .venv/bin/python tooling/test_character.py
"""

from __future__ import annotations

import contextlib
import io
import os
import sys
import tempfile
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

from tooling.core.errors import ReachError  # noqa: E402
from tooling.domains.character import glb_strip, qa  # noqa: E402


def check(failures: list[str], cond: bool, message: str) -> None:
    if not cond:
        failures.append(message)


def expect_error(failures: list[str], fn, code: int, label: str) -> None:
    try:
        fn()
        failures.append(f"{label}: did not fail")
    except ReachError as exc:
        check(failures, exc.exit_code == code, f"{label}: exit {exc.exit_code}, wanted {code}")
        check(failures, bool(exc.fix), f"{label}: no remedy")


def test_capture_plan(failures: list[str]) -> None:
    with tempfile.TemporaryDirectory() as tmp:
        home = Path(tmp)
        godot = home / "bin" / "godot4"
        godot.parent.mkdir()
        godot.write_text("#!/bin/sh\n")
        godot.chmod(0o755)
        never = lambda _name: None  # noqa: E731

        plan = qa.capture_plan("peasant", {"DISPLAY": ":0"}, home, which=never)
        check(failures, plan.config.name == "peasant.json", f"config name not resolved: {plan.config}")
        check(failures, plan.argv[0] == str(godot), f"~/bin/godot4 not preferred: {plan.argv}")
        check(failures, plan.argv[-1] == qa.SCENE and "--rendering-driver" in plan.argv, "scene argv changed")

        headless = qa.capture_plan(None, {}, home, which=never)
        check(failures, headless.argv[:2] == ["xvfb-run", "-a"], f"no $DISPLAY did not add xvfb-run: {headless.argv}")
        check(failures, headless.config.name == "peasant.json", "default config is no longer peasant")

        explicit = qa.capture_plan(None, {"GODOT": "/nope/godot", "DISPLAY": ":0"}, Path("/nonexistent"),
                                   which=lambda n: "/usr/bin/godot" if n == "godot" else None)
        check(failures, explicit.argv[0] == "/usr/bin/godot", f"PATH fallback order wrong: {explicit.argv}")

        expect_error(failures, lambda: qa.resolve_config("no_such_garment"), 2, "missing config")
        expect_error(failures, lambda: qa.resolve_godot({}, Path("/nonexistent"), which=never), 3, "missing godot")


def test_glb_strip(failures: list[str]) -> None:
    gltf = {
        "asset": {"version": "2.0"},
        "scene": 0,
        "scenes": [{"nodes": [0, 1, 2]}],
        "nodes": [
            {"name": "Body", "mesh": 0, "skin": 0},
            {"name": "Icosphere", "mesh": 1},
            {"name": "WGT-root", "mesh": 1, "children": [3]},
            {"name": "Child", "mesh": 0, "skin": 0},
        ],
        "meshes": [
            {"name": "Body", "primitives": [{"attributes": {"POSITION": 0, "JOINTS_0": 1}}]},
            {"name": "Icosphere", "primitives": [{"attributes": {"POSITION": 0}}]},
        ],
        "skins": [{"joints": [0]}],
        "buffers": [{"byteLength": 8}],
    }
    with tempfile.TemporaryDirectory() as tmp, contextlib.redirect_stderr(io.StringIO()):
        path = os.path.join(tmp, "x.glb")
        glb_strip.write_glb(gltf, b"\x00" * 8, path)
        result = glb_strip.process_file(path, path)
        check(failures, result["stripped"] == 2, f"expected 2 utility nodes stripped, got {result}")
        stripped, _bin = glb_strip.read_glb(path)
        kept = [stripped["nodes"][i]["name"] for i in stripped["scenes"][0]["nodes"]]
        check(failures, kept == ["Body"], f"scene roots after strip: {kept}")

        again = glb_strip.process_file(path, path)
        check(failures, again["stripped"] == 0, "a second strip was not a no-op")


def main() -> int:
    failures: list[str] = []
    test_capture_plan(failures)
    test_glb_strip(failures)
    if failures:
        print("test_character: FAIL", file=sys.stderr)
        for failure in failures:
            print(f"  - {failure}", file=sys.stderr)
        return 1
    print("test_character: OK — QA capture plan (config, godot order, xvfb, exit codes 2/3) "
          "and GLB strip decided without launching Godot")
    return 0


if __name__ == "__main__":
    sys.exit(main())