from pathlib import Path
import pytest
from spriteforge.manifest import ManifestInvalid, load_library, load_manifest

VALID="""\
defaults:
  dirs: 8
  fps: 12
  pivot: bottom_center
  tags: [monster]

skeleton_warrior:
  backend: blender
  rig: rigs/humanoid.blend
  parts: {torso: ribcage, head: skull}
  anims: [idle, walk]
  palettes: [bone_pale, bone_charred]

crypt_wall:
  backend: procedural
  generator: tileset_wall
  params: {material: stone_cracked, height: 96, variants: 6}
  dirs: 1

health_potion:
  backend: import
  source: items/health_potion.png
  size: 32x32
  palette: items_common
"""

def write(tmp_path: Path,text: str,name="assets.yaml")->Path:
    path=tmp_path/name;path.write_text(text,encoding="utf-8");return path

def test_flat_manifest_and_defaults(tmp_path):
    manifest=load_manifest(write(tmp_path,VALID))
    assert [x.id for x in manifest.assets]==["skeleton_warrior","crypt_wall","health_potion"]
    assert manifest.assets[0].spec.dirs==8 and manifest.assets[1].spec.dirs==1
    assert manifest.assets[2].spec.size=="32x32"

def test_nested_assets_supported(tmp_path):
    path=write(tmp_path,"defaults: {fps: 10}\nassets:\n  floor_a:\n    backend: procedural\n    generator: floor\n")
    assert load_manifest(path).assets[0].spec.fps==10

def test_error_has_exact_file_and_line(tmp_path):
    path=write(tmp_path,"bad_asset:\n  backend: procedural\n  generatr: floor\n")
    with pytest.raises(ManifestInvalid) as caught: load_manifest(path)
    rendered="\n".join(map(str,caught.value.errors))
    assert f"{path.resolve()}:3:3" in rendered and "generatr" in rendered

def test_backend_contract_and_size(tmp_path):
    path=write(tmp_path,"potion:\n  backend: import\n  source: potion.png\n  size: 32-32\n")
    with pytest.raises(ManifestInvalid) as caught: load_manifest(path)
    assert "WIDTHxHEIGHT" in str(caught.value)
    missing=write(tmp_path,"potion:\n  backend: import\n","missing.yaml")
    with pytest.raises(ManifestInvalid,match="requires 'source'"): load_manifest(missing)

def test_duplicate_ids_across_manifests(tmp_path):
    a=write(tmp_path,"floor:\n  backend: procedural\n  generator: floor\n","a.yaml")
    b=write(tmp_path,"floor:\n  backend: import\n  source: floor.png\n","b.yaml")
    with pytest.raises(ManifestInvalid,match="duplicate asset id"): load_library([a,b])