import os
import unittest
from pathlib import Path

import npc_pipeline


class NpcContractTests(unittest.TestCase):
    def test_contract_constants(self):
        self.assertEqual(npc_pipeline.SLOTS,
                         ["skin", "cloth", "pants", "accessory", "hair"])
        for bone in ["Head", "HipL", "HipR", "KneeL", "KneeR",
                     "ShoulderL", "ShoulderR", "ElbowL", "ElbowR",
                     "HandL", "HandR"]:
            self.assertIn(bone, npc_pipeline.BONES)
        self.assertLessEqual(npc_pipeline.MAX_TRIANGLES, 16000)
        self.assertLessEqual(npc_pipeline.MAX_VERTICES, 16000)

    def test_textures_exist_for_every_slot(self):
        for slot in npc_pipeline.SLOTS:
            for suffix in ("albedo", "normal", "orm"):
                path = npc_pipeline.TEX_DIR / f"{slot}_{suffix}.png"
                self.assertTrue(path.is_file(), path)
                self.assertGreater(path.stat().st_size, 100, path)

    @unittest.skipUnless(npc_pipeline.GLB_PATH.is_file(), "npc_base.glb not built")
    def test_committed_model_audits_clean(self):
        result = npc_pipeline.audit_glb()
        self.assertTrue(result["ok"], result["issues"])
        self.assertLessEqual(result["triangles"], npc_pipeline.MAX_TRIANGLES)
        self.assertLessEqual(result["vertices"], npc_pipeline.MAX_VERTICES)
        for bone in npc_pipeline.BONES:
            self.assertIn(bone, result["bones"])

    @unittest.skipUnless(npc_pipeline.GLB_PATH.is_file(), "npc_base.glb not built")
    def test_blend_source_is_committed(self):
        self.assertTrue(npc_pipeline.BLEND_PATH.is_file())
        # Godot must not try to import the .blend (it hangs without Blender).
        gdignore = npc_pipeline.BLEND_PATH.parent / ".gdignore"
        self.assertTrue(gdignore.is_file(), "assets/models/npc/.gdignore is required")


if __name__ == "__main__":
    unittest.main()