"""Tests for path_utils – asset category resolution."""
import os
import tempfile
from pathlib import Path
from unittest.mock import patch

import pytest

from app.assets.services.path_utils import (
    get_asset_category_and_relative_path,
    get_name_and_tags_from_asset_path,
)


@pytest.fixture
def fake_dirs():
    """Create temporary input, output, and temp directories."""
    with tempfile.TemporaryDirectory() as root:
        root_path = Path(root)
        input_dir = root_path / "input"
        output_dir = root_path / "output"
        temp_dir = root_path / "temp"
        models_dir = root_path / "models" / "checkpoints"
        for d in (input_dir, output_dir, temp_dir, models_dir):
            d.mkdir(parents=True)

        with patch("app.assets.services.path_utils.folder_paths") as mock_fp:
            mock_fp.get_input_directory.return_value = str(input_dir)
            mock_fp.get_output_directory.return_value = str(output_dir)
            mock_fp.get_temp_directory.return_value = str(temp_dir)

            with patch(
                "app.assets.services.path_utils.get_comfy_models_folders",
                return_value=[("checkpoints", [str(models_dir)])],
            ):
                yield {
                    "input": input_dir,
                    "output": output_dir,
                    "temp": temp_dir,
                    "models": models_dir,
                }


@pytest.fixture
def fake_dirs_multi_bucket():
    """Variant fixture with multiple model buckets (checkpoints + diffusers + loras)."""
    with tempfile.TemporaryDirectory() as root:
        root_path = Path(root)
        input_dir = root_path / "input"
        output_dir = root_path / "output"
        temp_dir = root_path / "temp"
        checkpoints_dir = root_path / "models" / "checkpoints"
        diffusers_dir = root_path / "models" / "diffusers"
        loras_dir = root_path / "models" / "loras"
        for d in (
            input_dir,
            output_dir,
            temp_dir,
            checkpoints_dir,
            diffusers_dir,
            loras_dir,
        ):
            d.mkdir(parents=True)

        with patch("app.assets.services.path_utils.folder_paths") as mock_fp:
            mock_fp.get_input_directory.return_value = str(input_dir)
            mock_fp.get_output_directory.return_value = str(output_dir)
            mock_fp.get_temp_directory.return_value = str(temp_dir)

            with patch(
                "app.assets.services.path_utils.get_comfy_models_folders",
                return_value=[
                    ("checkpoints", [str(checkpoints_dir)]),
                    ("diffusers", [str(diffusers_dir)]),
                    ("loras", [str(loras_dir)]),
                ],
            ):
                yield {
                    "input": input_dir,
                    "output": output_dir,
                    "temp": temp_dir,
                    "checkpoints": checkpoints_dir,
                    "diffusers": diffusers_dir,
                    "loras": loras_dir,
                }


class TestGetAssetCategoryAndRelativePath:
    def test_input_file(self, fake_dirs):
        f = fake_dirs["input"] / "photo.png"
        f.touch()
        cat, rel = get_asset_category_and_relative_path(str(f))
        assert cat == "input"
        assert rel == "photo.png"

    def test_output_file(self, fake_dirs):
        f = fake_dirs["output"] / "result.png"
        f.touch()
        cat, rel = get_asset_category_and_relative_path(str(f))
        assert cat == "output"
        assert rel == "result.png"

    def test_temp_file(self, fake_dirs):
        """Regression: temp files must be categorised, not raise ValueError."""
        f = fake_dirs["temp"] / "GLSLShader_output_00004_.png"
        f.touch()
        cat, rel = get_asset_category_and_relative_path(str(f))
        assert cat == "temp"
        assert rel == "GLSLShader_output_00004_.png"

    def test_temp_file_in_subfolder(self, fake_dirs):
        sub = fake_dirs["temp"] / "sub"
        sub.mkdir()
        f = sub / "ComfyUI_temp_tczip_00004_.png"
        f.touch()
        cat, rel = get_asset_category_and_relative_path(str(f))
        assert cat == "temp"
        assert os.path.normpath(rel) == os.path.normpath("sub/ComfyUI_temp_tczip_00004_.png")

    def test_model_file(self, fake_dirs):
        f = fake_dirs["models"] / "model.safetensors"
        f.touch()
        cat, rel = get_asset_category_and_relative_path(str(f))
        assert cat == "models"

    def test_unknown_path_raises(self, fake_dirs):
        with pytest.raises(ValueError, match="not within"):
            get_asset_category_and_relative_path("/some/random/path.png")


class TestGetNameAndTagsFromAssetPath:
    """tags collapse the parent subpath into a single slash-joined tag.

    Consumers should be able to read ``tags[1]`` as a stable category
    identifier regardless of how deep the file lives in the bucket.
    """

    def test_flat_input(self, fake_dirs_multi_bucket):
        f = fake_dirs_multi_bucket["input"] / "photo.png"
        f.touch()
        name, tags = get_name_and_tags_from_asset_path(str(f))
        assert name == "photo.png"
        assert tags == ["input"]

    def test_flat_output(self, fake_dirs_multi_bucket):
        f = fake_dirs_multi_bucket["output"] / "result_00001.png"
        f.touch()
        name, tags = get_name_and_tags_from_asset_path(str(f))
        assert name == "result_00001.png"
        assert tags == ["output"]

    def test_flat_models_checkpoint(self, fake_dirs_multi_bucket):
        f = fake_dirs_multi_bucket["checkpoints"] / "flux.safetensors"
        f.touch()
        name, tags = get_name_and_tags_from_asset_path(str(f))
        assert name == "flux.safetensors"
        assert tags == ["models", "checkpoints"]

    def test_diffusers_nested_subpath_slash_joined(self, fake_dirs_multi_bucket):
        """Diffusers components live in nested directories — the full subpath
        must collapse into one tag so consumers can look up the model category
        via tags[1] regardless of nesting depth."""
        nested = (
            fake_dirs_multi_bucket["diffusers"]
            / "Kolors"
            / "text_encoder"
        )
        nested.mkdir(parents=True)
        f = nested / "model.safetensors"
        f.touch()
        name, tags = get_name_and_tags_from_asset_path(str(f))
        assert name == "model.safetensors"
        assert tags == ["models", "diffusers/Kolors/text_encoder"]

    def test_deep_lora_user_subpath_slash_joined(self, fake_dirs_multi_bucket):
        """User-created subdirectories under a model bucket also collapse to a
        single tag rather than one tag per directory."""
        nested = (
            fake_dirs_multi_bucket["loras"]
            / "my"
            / "custom"
            / "path"
        )
        nested.mkdir(parents=True)
        f = nested / "v0001.safetensors"
        f.touch()
        name, tags = get_name_and_tags_from_asset_path(str(f))
        assert name == "v0001.safetensors"
        assert tags == ["models", "loras/my/custom/path"]