"""Tests for sidecar manifest parsing — Issue #2."""
import pytest
import tempfile
import os
from pathlib import Path

from sidecar.manifest import load_manifest, validate_profile


class TestValidateProfile:
    """Tests for manifest profile validation."""

    def test_valid_profile(self):
        profile = {
            "id": "qwen-3-8b",
            "name": "Qwen 3 8B",
            "model_path": "/home/bigt/AI/llm/qwen/qwen3-8b-q4.gguf",
            "flags": {"n_ctx": 8192, "n_gpu_layers": 35},
        }
        result = validate_profile(profile)
        assert result["id"] == "qwen-3-8b"
        assert result["name"] == "Qwen 3 8B"
        assert result["model_path"] == "/home/bigt/AI/llm/qwen/qwen3-8b-q4.gguf"
        assert result["flags"] == {"n_ctx": 8192, "n_gpu_layers": 35}

    def test_valid_profile_no_flags(self):
        profile = {"id": "test-model", "name": "Test", "model_path": "/path/to/model.gguf"}
        result = validate_profile(profile)
        assert result["id"] == "test-model"
        assert result["flags"] == {}

    def test_missing_id_raises(self):
        profile = {"name": "Test", "model_path": "/path"}
        with pytest.raises(ValueError, match="Missing required field: id"):
            validate_profile(profile)

    def test_missing_name_raises(self):
        profile = {"id": "test", "model_path": "/path"}
        with pytest.raises(ValueError, match="Missing required field: name"):
            validate_profile(profile)

    def test_missing_model_path_raises(self):
        profile = {"id": "test", "name": "Test"}
        with pytest.raises(ValueError, match="Missing required field: model_path"):
            validate_profile(profile)

    def test_flags_defaults_to_empty_dict(self):
        profile = {"id": "test", "name": "Test", "model_path": "/path"}
        result = validate_profile(profile)
        assert result["flags"] == {}


class TestLoadManifest:
    """Tests for manifest YAML loading."""

    def test_empty_manifest_returns_empty_list(self, tmp_path):
        manifest_file = tmp_path / "manifest.yaml"
        manifest_file.write_text("[]\n")
        result = load_manifest(str(manifest_file))
        assert result == []

    def test_empty_file_returns_empty_list(self, tmp_path):
        manifest_file = tmp_path / "manifest.yaml"
        manifest_file.write_text("")
        result = load_manifest(str(manifest_file))
        assert result == []

    def test_valid_manifest(self, tmp_path):
        manifest_file = tmp_path / "manifest.yaml"
        manifest_file.write_text(
            "- id: qwen-3-8b\n"
            "  name: \"Qwen 3 8B\"\n"
            "  model_path: /home/bigt/AI/llm/qwen/qwen3-8b-q4.gguf\n"
            "  flags:\n"
            "    n_ctx: 8192\n"
            "    n_gpu_layers: 35\n"
            "- id: qwen-3-8b-long\n"
            "  name: \"Qwen 3 8B (Long Context)\"\n"
            "  model_path: /home/bigt/AI/llm/qwen/qwen3-8b-q4.gguf\n"
            "  flags:\n"
            "    n_ctx: 32768\n"
            "    n_gpu_layers: 20\n"
        )
        result = load_manifest(str(manifest_file))
        assert len(result) == 2
        assert result[0]["id"] == "qwen-3-8b"
        assert result[1]["name"] == "Qwen 3 8B (Long Context)"
        assert result[1]["flags"]["n_ctx"] == 32768

    def test_invalid_yaml_returns_none(self, tmp_path):
        manifest_file = tmp_path / "manifest.yaml"
        manifest_file.write_text("{{{{invalid yaml:::\n")
        result = load_manifest(str(manifest_file))
        assert result is None

    def test_non_existent_file_returns_none(self, tmp_path):
        result = load_manifest(str(tmp_path / "nonexistent.yaml"))
        assert result is None

    def test_file_does_not_exist_returns_none(self):
        result = load_manifest("/tmp/does_not_exist_12345.yaml")
        assert result is None