"""
Integration tests for perturbation testing API endpoints.

Tests the backend/routers/testing.py endpoints.
"""
import pytest
import json
import os
import tempfile
import shutil
from fastapi.testclient import TestClient
from unittest.mock import patch, MagicMock

# Import the app
from backend.app import app


@pytest.fixture
def client():
    """Create test client."""
    return TestClient(app)


@pytest.fixture
def temp_prompts_dir(tmp_path):
    """Create a temporary directory for custom prompts."""
    prompts_dir = tmp_path / "custom_jailbreak_prompts"
    prompts_dir.mkdir()

    # Patch the CUSTOM_PROMPTS_DIR
    with patch("backend.routers.testing.CUSTOM_PROMPTS_DIR", str(prompts_dir)):
        yield prompts_dir


class TestListJailbreakPromptSources:
    """Tests for GET /api/testing/jailbreak-prompts/list"""

    def test_list_returns_sources(self, client):
        """Test that list endpoint returns sources."""
        response = client.get("/api/testing/jailbreak-prompts/list")

        assert response.status_code == 200
        data = response.json()
        assert "sources" in data
        assert isinstance(data["sources"], list)

    def test_list_includes_builtin_source(self, client):
        """Test that built-in source is included."""
        response = client.get("/api/testing/jailbreak-prompts/list")

        data = response.json()
        sources = data["sources"]

        # Find the standard/builtin source
        builtin = [s for s in sources if s.get("name") == "standard"]
        assert len(builtin) >= 1

    def test_source_has_required_fields(self, client):
        """Test that sources have required fields."""
        response = client.get("/api/testing/jailbreak-prompts/list")

        data = response.json()
        for source in data["sources"]:
            assert "name" in source
            assert "description" in source
            assert "count" in source
            assert "source_type" in source


class TestUploadJailbreakPrompts:
    """Tests for POST /api/testing/jailbreak-prompts/upload"""

    def test_upload_json_prompts(self, client, temp_prompts_dir):
        """Test uploading JSON prompts."""
        prompts = [
            {"name": "Test1", "prompt": "Test prompt 1"},
            {"name": "Test2", "prompt": "Test prompt 2"}
        ]

        response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=test_set",
            files={"file": ("prompts.json", json.dumps(prompts), "application/json")}
        )

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "success"
        assert data["name"] == "test_set"
        assert data["prompt_count"] == 2

    def test_upload_csv_prompts(self, client, temp_prompts_dir):
        """Test uploading CSV prompts."""
        csv_content = "name,prompt,description\nTest1,Test prompt 1,Desc1\nTest2,Test prompt 2,Desc2"

        response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=csv_set",
            files={"file": ("prompts.csv", csv_content, "text/csv")}
        )

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "success"
        assert data["prompt_count"] == 2

    def test_upload_invalid_json(self, client, temp_prompts_dir):
        """Test uploading invalid JSON."""
        response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=invalid",
            files={"file": ("prompts.json", "invalid json", "application/json")}
        )

        assert response.status_code == 500

    def test_upload_json_missing_prompt_field(self, client, temp_prompts_dir):
        """Test uploading JSON without prompt field."""
        prompts = [{"name": "Test", "content": "No prompt field"}]

        response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=missing",
            files={"file": ("prompts.json", json.dumps(prompts), "application/json")}
        )

        assert response.status_code == 400
        assert "prompt" in response.json()["detail"].lower()

    def test_upload_csv_missing_prompt_column(self, client, temp_prompts_dir):
        """Test uploading CSV without prompt column."""
        csv_content = "name,description\nTest1,Desc1"

        response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=missing",
            files={"file": ("prompts.csv", csv_content, "text/csv")}
        )

        assert response.status_code == 400
        assert "prompt" in response.json()["detail"].lower()

    def test_upload_unsupported_format(self, client, temp_prompts_dir):
        """Test uploading unsupported file format."""
        response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=unsupported",
            files={"file": ("prompts.txt", "text content", "text/plain")}
        )

        assert response.status_code == 400


class TestDeleteJailbreakPrompts:
    """Tests for DELETE /api/testing/jailbreak-prompts/{name}"""

    def test_delete_custom_prompts(self, client, temp_prompts_dir):
        """Test deleting custom prompts."""
        # First upload some prompts
        prompts = [{"prompt": "Test"}]
        client.post(
            "/api/testing/jailbreak-prompts/upload?name=to_delete",
            files={"file": ("prompts.json", json.dumps(prompts), "application/json")}
        )

        # Now delete them
        response = client.delete("/api/testing/jailbreak-prompts/to_delete")

        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "success"

    def test_delete_nonexistent_prompts(self, client, temp_prompts_dir):
        """Test deleting prompts that don't exist."""
        response = client.delete("/api/testing/jailbreak-prompts/nonexistent")

        assert response.status_code == 404

    def test_cannot_delete_builtin(self, client):
        """Test that built-in dataset cannot be deleted."""
        response = client.delete("/api/testing/jailbreak-prompts/standard")

        assert response.status_code == 400
        assert "built-in" in response.json()["detail"].lower()


class TestListPresets:
    """Tests for GET /api/testing/presets"""

    def test_list_presets(self, client):
        """Test listing available presets."""
        response = client.get("/api/testing/presets")

        assert response.status_code == 200
        data = response.json()
        assert "presets" in data
        assert len(data["presets"]) >= 3  # quick, standard, comprehensive

    def test_preset_has_required_fields(self, client):
        """Test that presets have required fields."""
        response = client.get("/api/testing/presets")

        data = response.json()
        for preset in data["presets"]:
            assert "name" in preset
            assert "description" in preset
            assert "jailbreak_techniques" in preset
            assert "demographics_count" in preset
            assert "comparison_mode" in preset

    def test_get_specific_preset(self, client):
        """Test getting a specific preset."""
        for preset_name in ["quick", "standard", "comprehensive"]:
            response = client.get(f"/api/testing/presets/{preset_name}")

            assert response.status_code == 200
            data = response.json()
            assert data["name"] == preset_name

    def test_get_invalid_preset(self, client):
        """Test getting an invalid preset."""
        response = client.get("/api/testing/presets/invalid")

        assert response.status_code == 404


class TestListDemographics:
    """Tests for GET /api/testing/demographics"""

    def test_list_demographics(self, client):
        """Test listing available demographics."""
        response = client.get("/api/testing/demographics")

        assert response.status_code == 200
        data = response.json()
        assert "demographics" in data

    def test_demographics_has_gender_options(self, client):
        """Test that gender options are provided."""
        response = client.get("/api/testing/demographics")

        data = response.json()
        assert "gender" in data["demographics"]
        genders = data["demographics"]["gender"]
        assert "male" in genders
        assert "female" in genders

    def test_demographics_has_race_options(self, client):
        """Test that race options are provided."""
        response = client.get("/api/testing/demographics")

        data = response.json()
        assert "race" in data["demographics"]
        races = data["demographics"]["race"]
        assert "White" in races
        assert "Black" in races

    def test_demographics_has_presets(self, client):
        """Test that demographic presets are provided."""
        response = client.get("/api/testing/demographics")

        data = response.json()
        assert "presets" in data["demographics"]
        presets = data["demographics"]["presets"]
        assert "minimal" in presets
        assert "standard" in presets
        assert "comprehensive" in presets

    def test_demographics_has_comparison_modes(self, client):
        """Test that comparison modes are provided."""
        response = client.get("/api/testing/demographics")

        data = response.json()
        assert "comparison_modes" in data
        modes = data["comparison_modes"]
        assert "vs_baseline" in modes
        assert "all_pairs" in modes
        assert "both" in modes

    def test_demographics_has_extended_dimensions(self, client):
        """Test that extended dimensions are provided."""
        response = client.get("/api/testing/demographics")

        data = response.json()
        assert "extended_dimensions" in data
        dims = data["extended_dimensions"]
        assert "age" in dims
        assert "disability" in dims
        assert "socioeconomic" in dims


class TestPerturbEndpoint:
    """Tests for POST /api/knowledge-graphs/{kg_id}/perturb"""

    def test_perturb_with_invalid_kg_id(self, client):
        """Test perturb endpoint with invalid kg_id."""
        response = client.post(
            "/api/knowledge-graphs/invalid_id/perturb",
            json={}
        )

        # Should return error (404 or 400)
        assert response.status_code in [400, 404, 500]

    def test_perturb_endpoint_exists(self, client):
        """Test that perturb endpoint exists."""
        # Just verify the endpoint exists (will fail with 404/400 for missing KG)
        response = client.post(
            "/api/knowledge-graphs/test_kg/perturb",
            json={"model": "gpt-4o-mini"}
        )

        # Should not be 404 Method Not Allowed - endpoint exists
        assert response.status_code != 405


class TestAPIWorkflow:
    """Integration tests for complete API workflows."""

    def test_upload_list_delete_workflow(self, client, temp_prompts_dir):
        """Test complete workflow: upload -> list -> delete."""
        # 1. Upload prompts
        prompts = [{"prompt": "Test prompt 1"}, {"prompt": "Test prompt 2"}]
        upload_response = client.post(
            "/api/testing/jailbreak-prompts/upload?name=workflow_test",
            files={"file": ("prompts.json", json.dumps(prompts), "application/json")}
        )
        assert upload_response.status_code == 200

        # 2. List sources and verify our upload is there
        list_response = client.get("/api/testing/jailbreak-prompts/list")
        assert list_response.status_code == 200
        sources = list_response.json()["sources"]
        names = [s["name"] for s in sources]
        assert "workflow_test" in names

        # 3. Delete the uploaded prompts
        delete_response = client.delete("/api/testing/jailbreak-prompts/workflow_test")
        assert delete_response.status_code == 200

        # 4. Verify deletion
        list_response = client.get("/api/testing/jailbreak-prompts/list")
        sources = list_response.json()["sources"]
        names = [s["name"] for s in sources]
        assert "workflow_test" not in names

    def test_get_preset_and_demographics_for_config(self, client):
        """Test getting preset and demographics to build config."""
        # Get a preset
        preset_response = client.get("/api/testing/presets/standard")
        assert preset_response.status_code == 200
        preset = preset_response.json()

        # Get demographics
        demo_response = client.get("/api/testing/demographics")
        assert demo_response.status_code == 200
        demographics = demo_response.json()

        # Verify we can build a config from these
        config = {
            "model": "gpt-4o-mini",
            "judge_model": "gpt-4o-mini",
            "max_relations": preset["max_relations"],
            "jailbreak": {
                "enabled": True,
                "num_techniques": preset["jailbreak_techniques"]
            },
            "counterfactual_bias": {
                "enabled": True,
                "demographics": demographics["demographics"]["presets"]["standard"],
                "comparison_mode": preset["comparison_mode"]
            }
        }

        # Verify config structure is valid
        assert config["jailbreak"]["num_techniques"] == 10
        assert len(config["counterfactual_bias"]["demographics"]) == 4