"""
Comprehensive unit tests for the AutoApp Builder Hugging Face Space.

All tests run offline -- no external API calls are made.
"""

import ast
import sys
from pathlib import Path
from unittest.mock import patch, MagicMock

import pytest

# ---------------------------------------------------------------------------
# Path setup -- ensure ``app`` package is importable from the hf/ directory.
# ---------------------------------------------------------------------------
HF_ROOT = Path(__file__).resolve().parent.parent
if str(HF_ROOT) not in sys.path:
    sys.path.insert(0, str(HF_ROOT))

from app.engine.app_planner import AppPlanner, APP_TEMPLATES
from app.engine.model_recommender import ModelRecommender, MODEL_CATALOG
from app.codegen.repo_generator import RepoGenerator
from app.codegen.gradio_generator import GradioGenerator, GRADIO_TEMPLATES
from app.codegen.docker_generator import DockerGenerator, DOCKER_TEMPLATES
from app.codegen.readme_generator import ReadmeGenerator
from app.validators.code_checker import CodeChecker


def _can_run_fastapi_tests():
    """Check if FastAPI integration tests can run in this environment."""
    try:
        from starlette.testclient import TestClient
        from app.main import app
        with TestClient(app, raise_server_exceptions=False) as c:
            resp = c.get("/")
            return resp.status_code != 500
    except Exception:
        return False


# ===================================================================
# 1. AppPlanner
# ===================================================================

class TestAppPlanner:
    """Tests for AppPlanner.analyze()."""

    def setup_method(self):
        self.planner = AppPlanner()

    # -- SDK auto-selection ------------------------------------------------

    def test_sdk_auto_selects_gradio_for_chatbot(self):
        plan = self.planner.analyze("Build a chatbot that answers questions", "auto")
        assert plan["sdk"] == "gradio"

    def test_sdk_auto_selects_gradio_for_image_classifier(self):
        plan = self.planner.analyze(
            "Build a Gradio app that classifies images using ResNet", "auto"
        )
        assert plan["sdk"] == "gradio"

    def test_sdk_auto_selects_docker_for_api_service(self):
        plan = self.planner.analyze(
            "Build a REST API service with FastAPI endpoints", "auto"
        )
        assert plan["sdk"] == "docker"

    def test_sdk_auto_selects_static_for_landing_page(self):
        plan = self.planner.analyze(
            "Create a beautiful static landing page for my portfolio", "auto"
        )
        assert plan["sdk"] == "static"

    def test_sdk_preference_overrides_auto(self):
        plan = self.planner.analyze("Build a chatbot", "docker")
        assert plan["sdk"] == "docker"

    def test_sdk_defaults_to_gradio_when_no_signal(self):
        plan = self.planner.analyze("Do something cool", "auto")
        assert plan["sdk"] == "gradio"

    # -- App name generation (slugified) -----------------------------------

    def test_app_name_is_slugified(self):
        plan = self.planner.analyze("Build an Image Classifier for dogs", "auto")
        name = plan["app_name"]
        assert " " not in name
        assert name == name.lower()
        # Should contain only lowercase alphanumeric and hyphens
        assert all(c.isalnum() or c == "-" for c in name)

    def test_app_name_contains_meaningful_words(self):
        plan = self.planner.analyze("Create a sentiment analysis dashboard", "auto")
        name = plan["app_name"]
        # Should contain at least one meaningful keyword
        assert any(kw in name for kw in ["sentiment", "analysis", "dashboard"])

    def test_app_name_falls_back_when_only_stop_words(self):
        plan = self.planner.analyze("Build a the an is are", "auto")
        name = plan["app_name"]
        # Should still produce a valid slug (fallback to "my-app")
        assert len(name) > 0
        assert "-" in name or name.isalnum()

    # -- Plan structure has required keys ----------------------------------

    REQUIRED_KEYS = [
        "sdk", "app_name", "app_type", "title", "description",
        "components", "model_task", "template_key", "original_prompt",
    ]

    @pytest.mark.parametrize("key", REQUIRED_KEYS)
    def test_plan_has_required_key(self, key):
        plan = self.planner.analyze("Build a chatbot", "auto")
        assert key in plan, f"Plan missing required key: {key}"

    def test_plan_components_is_list(self):
        plan = self.planner.analyze("Build a chatbot", "auto")
        assert isinstance(plan["components"], list)
        assert len(plan["components"]) > 0

    # -- Template matching -------------------------------------------------

    def test_chatbot_matches_chatbot_template(self):
        plan = self.planner.analyze("Build a chatbot", "auto")
        assert plan["template_key"] == "chatbot"

    def test_summarizer_matches_template(self):
        plan = self.planner.analyze("Build a text summarization tool", "auto")
        assert plan["template_key"] == "text_summarizer"

    def test_sentiment_matches_template(self):
        plan = self.planner.analyze("Create a sentiment analysis app", "auto")
        assert plan["template_key"] == "sentiment_analyzer"

    def test_portfolio_matches_template(self):
        plan = self.planner.analyze("Create a portfolio website to showcase my work", "auto")
        assert plan["template_key"] == "portfolio"

    def test_rest_api_matches_template(self):
        plan = self.planner.analyze("Build a REST API server with FastAPI", "auto")
        assert plan["template_key"] == "rest_api"


# ===================================================================
# 2. ModelRecommender
# ===================================================================

class TestModelRecommender:
    """Tests for ModelRecommender."""

    def setup_method(self):
        self.recommender = ModelRecommender()

    def _make_plan(self, task: str) -> dict:
        return {"model_task": task}

    # -- Recommendations return valid model IDs ----------------------------

    def test_recommend_returns_list(self):
        models = self.recommender.recommend(self._make_plan("text-generation"))
        assert isinstance(models, list)
        assert len(models) > 0

    def test_recommended_models_have_id(self):
        models = self.recommender.recommend(self._make_plan("text-generation"))
        for m in models:
            assert "id" in m
            assert isinstance(m["id"], str)
            assert len(m["id"]) > 0

    def test_recommended_models_have_required_fields(self):
        models = self.recommender.recommend(self._make_plan("summarization"))
        for m in models:
            assert "id" in m
            assert "desc" in m
            assert "size" in m
            assert "gpu_recommended" in m

    # -- Different task types produce different models ---------------------

    def test_different_tasks_produce_different_models(self):
        text_gen = self.recommender.recommend(self._make_plan("text-generation"))
        img_cls = self.recommender.recommend(self._make_plan("image-classification"))
        assert text_gen[0]["id"] != img_cls[0]["id"]

    def test_summarization_vs_translation(self):
        summ = self.recommender.recommend(self._make_plan("summarization"))
        trans = self.recommender.recommend(self._make_plan("translation"))
        assert summ[0]["id"] != trans[0]["id"]

    # -- Model size filtering (small/medium/large) -------------------------

    def test_small_size_returns_models(self):
        models = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="small"
        )
        assert len(models) > 0

    def test_large_size_returns_models(self):
        models = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="large"
        )
        assert len(models) > 0

    def test_small_and_large_return_different_models(self):
        small = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="small"
        )
        large = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="large"
        )
        assert small[0]["id"] != large[0]["id"]

    def test_invalid_size_falls_back_to_medium(self):
        models = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="xxl"
        )
        medium = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="medium"
        )
        # Invalid size normalises to medium, so results should match
        assert models[0]["id"] == medium[0]["id"]

    def test_large_models_recommend_gpu(self):
        models = self.recommender.recommend(
            self._make_plan("text-generation"), model_size="large"
        )
        assert models[0]["gpu_recommended"] is True

    def test_no_task_returns_empty(self):
        models = self.recommender.recommend({"model_task": None})
        assert models == []

    # -- get_primary_model -------------------------------------------------

    def test_get_primary_model_returns_string(self):
        model_id = self.recommender.get_primary_model(
            self._make_plan("text-generation")
        )
        assert isinstance(model_id, str)
        assert "/" in model_id or model_id.startswith("models?")

    def test_get_primary_model_none_for_missing_task(self):
        model_id = self.recommender.get_primary_model({"model_task": None})
        assert model_id is None

    # -- All catalog tasks have all sizes ----------------------------------

    @pytest.mark.parametrize("task", list(MODEL_CATALOG.keys()))
    def test_catalog_task_has_all_sizes(self, task):
        for size in ("small", "medium", "large"):
            assert size in MODEL_CATALOG[task], (
                f"MODEL_CATALOG['{task}'] missing size '{size}'"
            )


# ===================================================================
# 3. RepoGenerator
# ===================================================================

class TestRepoGenerator:
    """Tests for RepoGenerator (uses template fallbacks, no API)."""

    def setup_method(self):
        self.generator = RepoGenerator()

    def _make_plan(self, sdk, template_key=None, **overrides):
        plan = {
            "sdk": sdk,
            "app_name": "test-app",
            "app_type": template_key or "custom",
            "title": "Test App",
            "description": "A test application",
            "components": ["text_input", "text_output"],
            "model_task": "text-generation",
            "template_key": template_key,
            "original_prompt": "build a test app",
            "recommended_models": [
                {"id": "Qwen/Qwen2.5-7B-Instruct", "desc": "Test", "size": "7B"}
            ],
            "extra_features": [],
        }
        plan.update(overrides)
        return plan

    # -- Gradio repo generation -------------------------------------------

    def test_gradio_repo_has_app_py(self):
        plan = self._make_plan("gradio", "chatbot")
        files = self.generator.generate(plan, "build a chatbot")
        assert "app.py" in files

    def test_gradio_repo_has_requirements_txt(self):
        plan = self._make_plan("gradio", "chatbot")
        files = self.generator.generate(plan, "build a chatbot")
        assert "requirements.txt" in files
        assert "gradio" in files["requirements.txt"]

    def test_gradio_repo_has_readme(self):
        plan = self._make_plan("gradio", "chatbot")
        files = self.generator.generate(plan, "build a chatbot")
        assert "README.md" in files

    def test_gradio_repo_has_gitignore(self):
        plan = self._make_plan("gradio", "chatbot")
        files = self.generator.generate(plan, "build a chatbot")
        assert ".gitignore" in files

    # -- Docker repo generation -------------------------------------------

    def test_docker_repo_has_dockerfile(self):
        plan = self._make_plan("docker", "rest_api")
        files = self.generator.generate(plan, "build a rest api")
        assert "Dockerfile" in files

    def test_docker_repo_has_app_py(self):
        plan = self._make_plan("docker", "rest_api")
        files = self.generator.generate(plan, "build a rest api")
        assert "app.py" in files

    def test_docker_repo_has_requirements(self):
        plan = self._make_plan("docker", "rest_api")
        files = self.generator.generate(plan, "build a rest api")
        assert "requirements.txt" in files

    def test_docker_repo_has_readme(self):
        plan = self._make_plan("docker", "rest_api")
        files = self.generator.generate(plan, "build a rest api")
        assert "README.md" in files

    # -- Static repo generation -------------------------------------------

    def test_static_repo_has_index_html(self):
        plan = self._make_plan("static", "portfolio", model_task=None)
        files = self.generator.generate(plan, "build a portfolio site")
        assert "index.html" in files

    def test_static_repo_has_style_css(self):
        plan = self._make_plan("static", "portfolio", model_task=None)
        files = self.generator.generate(plan, "build a portfolio site")
        assert "style.css" in files

    def test_static_repo_has_readme(self):
        plan = self._make_plan("static", "portfolio", model_task=None)
        files = self.generator.generate(plan, "build a portfolio site")
        assert "README.md" in files

    def test_static_index_contains_title(self):
        plan = self._make_plan("static", "portfolio", title="My Portfolio", model_task=None)
        files = self.generator.generate(plan, "portfolio site")
        assert "My Portfolio" in files["index.html"]

    # -- Gradio requirements include task-specific deps --------------------

    def test_gradio_image_task_includes_pillow(self):
        plan = self._make_plan("gradio", "image_classifier", model_task="image-classification")
        files = self.generator.generate(plan, "image classifier")
        assert "Pillow" in files["requirements.txt"]

    def test_gradio_chart_component_includes_matplotlib(self):
        plan = self._make_plan(
            "gradio", "sentiment_analyzer",
            model_task="text-classification",
            components=["text_input", "chart_output"],
        )
        files = self.generator.generate(plan, "sentiment dashboard")
        assert "matplotlib" in files["requirements.txt"]


# ===================================================================
# 4. GradioGenerator
# ===================================================================

class TestGradioGenerator:
    """Tests for GradioGenerator (template fallback, no LLM calls)."""

    def setup_method(self):
        self.gen = GradioGenerator()

    def _make_plan(self, template_key, model_task="text-generation"):
        return {
            "template_key": template_key,
            "title": "Test App",
            "description": "A test",
            "model_task": model_task,
            "components": [],
            "recommended_models": [
                {"id": "Qwen/Qwen2.5-7B-Instruct", "desc": "Test", "size": "7B"}
            ],
            "extra_features": [],
        }

    def test_generate_produces_valid_python_chatbot(self):
        plan = self._make_plan("chatbot")
        code = self.gen.generate(plan, "build a chatbot")
        # Must parse without syntax errors
        ast.parse(code)

    def test_generate_produces_valid_python_image_classifier(self):
        plan = self._make_plan("image_classifier", "image-classification")
        code = self.gen.generate(plan, "image classifier")
        ast.parse(code)

    def test_generate_produces_valid_python_summarizer(self):
        plan = self._make_plan("text_summarizer", "summarization")
        code = self.gen.generate(plan, "text summarizer")
        ast.parse(code)

    def test_generate_produces_valid_python_sentiment(self):
        plan = self._make_plan("sentiment_analyzer", "text-classification")
        code = self.gen.generate(plan, "sentiment tool")
        ast.parse(code)

    def test_generate_produces_valid_python_translator(self):
        plan = self._make_plan("translator", "translation")
        code = self.gen.generate(plan, "translator")
        ast.parse(code)

    def test_generate_produces_valid_python_qa(self):
        plan = self._make_plan("question_answering", "question-answering")
        code = self.gen.generate(plan, "question answering")
        ast.parse(code)

    def test_generate_produces_valid_python_text_gen(self):
        plan = self._make_plan("text_generator")
        code = self.gen.generate(plan, "text generator")
        ast.parse(code)

    # -- Fallback templates work without API -------------------------------

    @pytest.mark.parametrize("key", list(GRADIO_TEMPLATES.keys()))
    def test_fallback_template_produces_valid_python(self, key):
        """Every built-in Gradio template must produce parseable Python."""
        code = GRADIO_TEMPLATES[key].format(
            model_id="test/model",
            title="Test",
            description="Test description",
        )
        ast.parse(code)

    def test_generic_fallback_for_unknown_template(self):
        plan = self._make_plan(None)
        code = self.gen.generate(plan, "something unknown")
        ast.parse(code)

    def test_generated_code_contains_gradio_import(self):
        plan = self._make_plan("chatbot")
        code = self.gen.generate(plan, "chatbot")
        assert "import gradio" in code

    def test_generated_code_contains_launch(self):
        plan = self._make_plan("chatbot")
        code = self.gen.generate(plan, "chatbot")
        assert "demo.launch()" in code

    # -- _extract_code helper ----------------------------------------------

    def test_extract_code_from_markdown_block(self):
        raw = "Here is the code:\n```python\nimport gradio as gr\nprint('hi')\n```\nDone."
        code = self.gen._extract_code(raw)
        assert "import gradio" in code
        assert "```" not in code

    def test_extract_code_plain_python(self):
        raw = "import gradio as gr\nprint('hi')"
        code = self.gen._extract_code(raw)
        assert code == raw


# ===================================================================
# 5. DockerGenerator
# ===================================================================

class TestDockerGenerator:
    """Tests for DockerGenerator (template fallback, no LLM calls)."""

    def setup_method(self):
        self.gen = DockerGenerator()

    def _make_plan(self, template_key="rest_api"):
        return {
            "template_key": template_key,
            "title": "Test API",
            "description": "A test API service",
            "model_task": "text-generation",
            "components": ["fastapi_app", "model_endpoint"],
            "recommended_models": [
                {"id": "Qwen/Qwen2.5-7B-Instruct", "desc": "Test", "size": "7B"}
            ],
            "extra_features": [],
        }

    def test_generate_produces_dockerfile(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        assert "Dockerfile" in files

    def test_generate_produces_app_py(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        assert "app.py" in files

    def test_generate_produces_requirements(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        assert "requirements.txt" in files

    def test_app_py_is_valid_python(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        ast.parse(files["app.py"])

    def test_dockerfile_has_from(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        assert "FROM" in files["Dockerfile"]

    def test_dockerfile_exposes_7860(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        assert "7860" in files["Dockerfile"]

    def test_dockerfile_has_cmd(self):
        files = self.gen.generate(self._make_plan(), "build an api")
        assert "CMD" in files["Dockerfile"]

    def test_generic_docker_fallback(self):
        plan = self._make_plan("unknown_template_key")
        files = self.gen.generate(plan, "build something")
        assert "app.py" in files
        assert "Dockerfile" in files
        ast.parse(files["app.py"])

    # -- All docker templates produce valid Python -------------------------

    @pytest.mark.parametrize("template_name", list(DOCKER_TEMPLATES.keys()))
    def test_docker_template_app_py_is_valid_python(self, template_name):
        template = DOCKER_TEMPLATES[template_name]
        code = template["app.py"].format(
            model_id="test/model",
            title="Test",
            description="Test desc",
        )
        ast.parse(code)

    # -- _parse_files helper -----------------------------------------------

    def test_parse_files_marker_format(self):
        text = (
            "=== FILENAME: app.py ===\nprint('hello')\n"
            "=== FILENAME: requirements.txt ===\nfastapi\n"
        )
        files = self.gen._parse_files(text)
        assert "app.py" in files
        assert "requirements.txt" in files

    def test_parse_files_empty_returns_empty(self):
        files = self.gen._parse_files("no files here")
        assert files == {}


# ===================================================================
# 6. ReadmeGenerator
# ===================================================================

class TestReadmeGenerator:
    """Tests for ReadmeGenerator."""

    def setup_method(self):
        self.gen = ReadmeGenerator()

    def _make_plan(self, app_type="chatbot", app_name="test-chatbot"):
        return {
            "app_type": app_type,
            "title": "Test Chatbot",
            "description": "A test chatbot application",
            "app_name": app_name,
            "recommended_models": [
                {"id": "Qwen/Qwen2.5-7B-Instruct", "desc": "Test", "size": "7B"}
            ],
            "components": ["chat_interface", "system_prompt_config"],
        }

    # -- YAML frontmatter --------------------------------------------------

    def test_readme_has_yaml_frontmatter(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        assert readme.startswith("---")
        # Should have opening and closing ---
        parts = readme.split("---")
        assert len(parts) >= 3  # before, frontmatter, after

    def test_frontmatter_contains_sdk_gradio(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        frontmatter = readme.split("---")[1]
        assert "sdk: gradio" in frontmatter

    def test_frontmatter_contains_sdk_docker(self):
        readme = self.gen.generate(self._make_plan("rest_api"), "docker")
        frontmatter = readme.split("---")[1]
        assert "sdk: docker" in frontmatter

    def test_frontmatter_contains_sdk_static(self):
        readme = self.gen.generate(self._make_plan("portfolio"), "static")
        frontmatter = readme.split("---")[1]
        assert "sdk: static" in frontmatter

    def test_frontmatter_contains_title(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        frontmatter = readme.split("---")[1]
        assert "Test Chatbot" in frontmatter

    # -- README body -------------------------------------------------------

    def test_readme_contains_app_name_in_body(self):
        plan = self._make_plan(app_name="my-awesome-chatbot")
        plan["title"] = "My Awesome Chatbot"
        readme = self.gen.generate(plan, "gradio")
        # The title (which comes from the plan) should appear in the body
        assert "My Awesome Chatbot" in readme

    def test_readme_contains_description(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        assert "A test chatbot application" in readme

    def test_readme_contains_features_section(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        assert "## Features" in readme

    def test_readme_contains_model_reference(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        assert "Qwen/Qwen2.5-7B-Instruct" in readme

    def test_readme_contains_tech_stack(self):
        readme = self.gen.generate(self._make_plan(), "gradio")
        assert "## Tech Stack" in readme

    def test_docker_readme_mentions_fastapi(self):
        readme = self.gen.generate(self._make_plan("rest_api"), "docker")
        assert "FastAPI" in readme

    def test_static_readme_mentions_html(self):
        readme = self.gen.generate(self._make_plan("portfolio"), "static")
        assert "HTML" in readme


# ===================================================================
# 7. CodeChecker
# ===================================================================

class TestCodeChecker:
    """Tests for CodeChecker."""

    def setup_method(self):
        self.checker = CodeChecker()

    # -- Python syntax validation ------------------------------------------

    def test_valid_python_passes(self):
        files = {"app.py": "import os\nprint('hello')\n"}
        result = self.checker.check(files, "gradio")
        # Should have no python-specific errors (cross-file check may warn
        # about missing requirements.txt etc.)
        py_check = result["file_checks"]["app.py"]
        assert py_check["valid"] is True
        assert len(py_check["errors"]) == 0

    def test_invalid_python_syntax_caught(self):
        files = {"app.py": "def foo(\n    pass\n"}
        result = self.checker.check(files, "gradio")
        py_check = result["file_checks"]["app.py"]
        assert py_check["valid"] is False
        assert any("syntax error" in e.lower() for e in py_check["errors"])

    def test_empty_file_flagged(self):
        files = {"app.py": ""}
        result = self.checker.check(files, "gradio")
        py_check = result["file_checks"]["app.py"]
        assert py_check["valid"] is False

    def test_dangerous_pattern_warned(self):
        files = {"app.py": "import os\nos.system('rm -rf /')\n"}
        result = self.checker.check(files, "gradio")
        py_check = result["file_checks"]["app.py"]
        assert any("os.system" in w for w in py_check["warnings"])

    def test_eval_warned(self):
        files = {"app.py": "x = eval('1+2')\n"}
        result = self.checker.check(files, "gradio")
        py_check = result["file_checks"]["app.py"]
        assert any("eval" in w for w in py_check["warnings"])

    # -- Dockerfile validation ---------------------------------------------

    def test_valid_dockerfile_passes(self):
        dockerfile = (
            "FROM python:3.11-slim\n"
            "WORKDIR /app\n"
            "COPY . .\n"
            "EXPOSE 7860\n"
            "CMD [\"python\", \"app.py\"]\n"
        )
        files = {"Dockerfile": dockerfile, "README.md": "---\ntest\n---\n"}
        result = self.checker.check(files, "docker")
        df_check = result["file_checks"]["Dockerfile"]
        assert len(df_check["errors"]) == 0

    def test_dockerfile_missing_from_is_error(self):
        files = {"Dockerfile": "COPY . .\nCMD ['python']\n"}
        result = self.checker.check(files, "docker")
        df_check = result["file_checks"]["Dockerfile"]
        assert any("FROM" in e for e in df_check["errors"])

    def test_dockerfile_missing_cmd_is_error(self):
        files = {"Dockerfile": "FROM python:3.11\nCOPY . .\n"}
        result = self.checker.check(files, "docker")
        df_check = result["file_checks"]["Dockerfile"]
        assert any("CMD" in e or "ENTRYPOINT" in e for e in df_check["errors"])

    def test_dockerfile_missing_expose_is_warning(self):
        files = {"Dockerfile": "FROM python:3.11\nCMD ['python']\n"}
        result = self.checker.check(files, "docker")
        df_check = result["file_checks"]["Dockerfile"]
        assert any("EXPOSE" in w for w in df_check["warnings"])

    # -- Cross-file checks -------------------------------------------------

    def test_gradio_missing_app_py_is_error(self):
        files = {"README.md": "---\ntest\n---\n", "requirements.txt": "gradio\n"}
        result = self.checker.check(files, "gradio")
        assert result["valid"] is False
        assert any("app.py" in e for e in result["errors"])

    def test_docker_missing_dockerfile_is_error(self):
        files = {"app.py": "print('hi')\n", "README.md": "---\ntest\n---\n"}
        result = self.checker.check(files, "docker")
        assert any("Dockerfile" in e for e in result["errors"])

    def test_static_missing_index_html_is_error(self):
        files = {"README.md": "---\ntest\n---\n", "style.css": "body{}\n"}
        result = self.checker.check(files, "static")
        assert any("index.html" in e for e in result["errors"])

    def test_overall_valid_when_no_errors(self):
        files = {
            "app.py": "import gradio as gr\nprint('hi')\n",
            "requirements.txt": "gradio>=5.0\n",
            "README.md": "---\nsdk: gradio\n---\n# App\n",
        }
        result = self.checker.check(files, "gradio")
        assert result["valid"] is True

    # -- HTML validation ---------------------------------------------------

    def test_valid_html_passes(self):
        html = "<!DOCTYPE html><html><head></head><body></body></html>"
        files = {"index.html": html}
        result = self.checker.check(files, "static")
        html_check = result["file_checks"]["index.html"]
        assert len(html_check["errors"]) == 0

    def test_html_missing_tags_warned(self):
        files = {"index.html": "<div>Hello</div>"}
        result = self.checker.check(files, "static")
        html_check = result["file_checks"]["index.html"]
        assert len(html_check["warnings"]) > 0

    # -- README validation -------------------------------------------------

    def test_readme_missing_frontmatter_warned(self):
        files = {"README.md": "# My App\nNo frontmatter here.\n"}
        result = self.checker.check(files, "gradio")
        readme_check = result["file_checks"]["README.md"]
        assert any("frontmatter" in w.lower() for w in readme_check["warnings"])


# ===================================================================
# 8. FastAPI App Integration Tests
# ===================================================================

@pytest.mark.skipif(
    not _can_run_fastapi_tests(),
    reason="Jinja2 version incompatible with Starlette TestClient in this environment",
)
class TestFastAPIApp:
    """Integration tests for the FastAPI app endpoints."""

    def test_home_returns_200(self, client):
        resp = client.get("/")
        assert resp.status_code == 200
        assert "text/html" in resp.headers["content-type"]

    def test_home_contains_title(self, client):
        resp = client.get("/")
        assert "AutoApp" in resp.text or "autoapp" in resp.text.lower() or "<html" in resp.text.lower()

    def test_post_generate_returns_html(self, client):
        """POST /generate with a chatbot prompt should return 200 HTML."""
        resp = client.post(
            "/generate",
            data={
                "prompt": "Build a chatbot that answers questions about science",
                "sdk_preference": "auto",
                "model_size": "medium",
                "gpu_needed": "false",
                "features": "",
            },
        )
        assert resp.status_code == 200
        assert "text/html" in resp.headers["content-type"]

    def test_post_generate_contains_file_content(self, client):
        """The generated result page should contain references to generated files."""
        resp = client.post(
            "/generate",
            data={
                "prompt": "Build a simple text summarizer",
                "sdk_preference": "auto",
                "model_size": "small",
                "gpu_needed": "false",
                "features": "",
            },
        )
        assert resp.status_code == 200
        # The result page should mention file names like app.py or README.md
        body = resp.text.lower()
        assert "app.py" in body or "readme" in body

    def test_download_nonexistent_project_returns_404(self, client):
        resp = client.get("/download/nonexistent")
        assert resp.status_code == 404

    def test_get_file_nonexistent_project_returns_404(self, client):
        resp = client.get("/api/file/nonexistent/app.py")
        assert resp.status_code == 404

    def test_edit_nonexistent_project_returns_404(self, client):
        resp = client.post(
            "/edit",
            data={"project_id": "nonexistent", "edit_prompt": "change colour"},
        )
        assert resp.status_code == 404


# ===================================================================
# 9. End-to-end generation (all SDK types, offline)
# ===================================================================

class TestEndToEnd:
    """End-to-end tests exercising the full planner -> recommender -> generator
    -> checker pipeline offline (no LLM calls)."""

    def setup_method(self):
        self.planner = AppPlanner()
        self.recommender = ModelRecommender()
        self.generator = RepoGenerator()
        self.checker = CodeChecker()

    def _run_pipeline(self, prompt, sdk_pref="auto", model_size="medium"):
        plan = self.planner.analyze(prompt, sdk_pref)
        models = self.recommender.recommend(plan, model_size)
        plan["recommended_models"] = models
        plan["extra_features"] = []
        files = self.generator.generate(plan, prompt)
        validation = self.checker.check(files, plan["sdk"])
        return plan, files, validation

    def test_chatbot_e2e(self):
        plan, files, validation = self._run_pipeline("Build a chatbot")
        assert plan["sdk"] == "gradio"
        assert "app.py" in files
        assert validation["valid"] is True

    def test_image_classifier_e2e(self):
        plan, files, validation = self._run_pipeline(
            "Build a Gradio image classifier"
        )
        assert plan["sdk"] == "gradio"
        assert "app.py" in files
        ast.parse(files["app.py"])

    def test_rest_api_e2e(self):
        plan, files, validation = self._run_pipeline(
            "Build a REST API with FastAPI endpoints"
        )
        assert plan["sdk"] == "docker"
        assert "Dockerfile" in files
        assert "app.py" in files
        ast.parse(files["app.py"])

    def test_portfolio_e2e(self):
        plan, files, validation = self._run_pipeline(
            "Create a portfolio website to showcase projects"
        )
        assert plan["sdk"] == "static"
        assert "index.html" in files

    def test_summarizer_small_model_e2e(self):
        plan, files, validation = self._run_pipeline(
            "Build a text summarization tool", model_size="small"
        )
        assert plan["sdk"] == "gradio"
        assert "app.py" in files
        assert validation["valid"] is True