"""
End-to-end integration tests for ArcisVLM cloud pipeline.

Tests the full API contract, agent routing, alert CRUD, WebSocket connectivity,
and orchestrator task classification — all without a GPU.

Model inference is mocked; the goal is to verify the API layer and agent routing.
"""

import pytest
import sys
import os
import base64
import io
import json
from unittest.mock import patch, MagicMock

# Ensure project root is on path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

# Set env to skip real model loading
os.environ["ARCISVLM_CONFIG"] = "configs/scale_1.3b.yaml"


def _make_test_image_base64() -> str:
    """Generate a small random test image as base64-encoded JPEG."""
    # Create a minimal valid JPEG without needing PIL
    # Use a 2x2 red pixel BMP converted concept — but simpler: just use raw bytes
    # Actually, let's create a tiny valid JPEG
    # Minimal JPEG: SOI + APP0 + minimal frame
    # Easier approach: create with PIL if available, otherwise use a known minimal JPEG
    try:
        from PIL import Image
        img = Image.new("RGB", (4, 4), color=(128, 64, 32))
        buf = io.BytesIO()
        img.save(buf, format="JPEG")
        return base64.b64encode(buf.getvalue()).decode("utf-8")
    except ImportError:
        # Minimal valid JPEG bytes (1x1 pixel white)
        minimal_jpeg = bytes([
            0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00,
            0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0xFF, 0xDB,
            0x00, 0x43, 0x00, 0x08, 0x06, 0x06, 0x07, 0x06, 0x05, 0x08, 0x07,
            0x07, 0x07, 0x09, 0x09, 0x08, 0x0A, 0x0C, 0x14, 0x0D, 0x0C, 0x0B,
            0x0B, 0x0C, 0x19, 0x12, 0x13, 0x0F, 0x14, 0x1D, 0x1A, 0x1F, 0x1E,
            0x1D, 0x1A, 0x1C, 0x1C, 0x20, 0x24, 0x2E, 0x27, 0x20, 0x22, 0x2C,
            0x23, 0x1C, 0x1C, 0x28, 0x37, 0x29, 0x2C, 0x30, 0x31, 0x34, 0x34,
            0x34, 0x1F, 0x27, 0x39, 0x3D, 0x38, 0x32, 0x3C, 0x2E, 0x33, 0x34,
            0x32, 0xFF, 0xC0, 0x00, 0x0B, 0x08, 0x00, 0x01, 0x00, 0x01, 0x01,
            0x01, 0x11, 0x00, 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05,
            0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
            0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01,
            0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00,
            0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21,
            0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32,
            0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1,
            0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18,
            0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36,
            0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
            0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64,
            0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77,
            0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A,
            0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3,
            0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5,
            0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
            0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9,
            0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA,
            0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF,
            0xDA, 0x00, 0x08, 0x01, 0x01, 0x00, 0x00, 0x3F, 0x00, 0x7B, 0x94,
            0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xD9,
        ])
        return base64.b64encode(minimal_jpeg).decode("utf-8")


def _mock_result(answer="mocked answer", confidence=0.85, expert_used="vqa", **kwargs):
    """Create a mock Result object."""
    from agents.base import Result
    return Result(
        answer=answer,
        confidence=confidence,
        expert_used=expert_used,
        task_id=kwargs.get("task_id", "test-task-001"),
        metadata=kwargs.get("metadata", {}),
    )


# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------
@pytest.fixture(scope="module")
def client():
    """Create a TestClient with mocked model manager for integration tests."""
    from fastapi.testclient import TestClient
    from api.main import app
    with TestClient(app) as c:
        yield c


@pytest.fixture(scope="module")
def test_image_b64():
    """A small test image as base64."""
    return _make_test_image_base64()


# ---------------------------------------------------------------------------
# 1. Health endpoint returns model info
# ---------------------------------------------------------------------------
class TestHealthIntegration:
    def test_health_returns_200_with_model_info(self, client):
        resp = client.get("/health")
        assert resp.status_code == 200
        data = resp.json()
        assert data["model"] == "arcisvlm-1.6b"
        assert data["version"] == "1.0.0"
        assert "status" in data
        assert "model_loaded" in data
        assert "agents_ready" in data

    def test_health_status_is_valid(self, client):
        resp = client.get("/health")
        data = resp.json()
        assert data["status"] in ("ok", "starting")


# ---------------------------------------------------------------------------
# 2–5. POST /api/v1/query with various task_types (mocked inference)
# ---------------------------------------------------------------------------
class TestInferenceIntegration:
    """Tests POST /api/v1/query with different task_types, mocking the submit_task."""

    def test_vqa_query_with_image(self, client, test_image_b64):
        """POST /api/v1/query with a test image gets a VQA answer."""
        mock_result = _mock_result(
            answer="This is a red building",
            expert_used="vqa",
            confidence=0.92,
        )
        with patch("api.routes.inference.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.camera_manager = None
            manager.submit_task.return_value = mock_result
            mock_mgr.return_value = manager

            resp = client.post("/api/v1/query", json={
                "question": "What is in this image?",
                "image_base64": test_image_b64,
                "task_type": "vqa",
            })

        assert resp.status_code == 200
        data = resp.json()
        assert data["answer"] == "This is a red building"
        assert data["expert_used"] == "vqa"
        assert data["confidence"] == 0.92
        assert "processing_time_ms" in data

    def test_detect_task_type(self, client, test_image_b64):
        """POST /api/v1/query with task_type=detect gets detection response."""
        mock_result = _mock_result(
            answer="Detected 3 objects: person, car, dog",
            expert_used="detect",
            confidence=0.88,
            metadata={"objects": ["person", "car", "dog"], "count": 3},
        )
        with patch("api.routes.inference.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.camera_manager = None
            manager.submit_task.return_value = mock_result
            mock_mgr.return_value = manager

            resp = client.post("/api/v1/query", json={
                "question": "Detect objects in the scene",
                "image_base64": test_image_b64,
                "task_type": "detect",
            })

        assert resp.status_code == 200
        data = resp.json()
        assert "detect" in data["answer"].lower() or "object" in data["answer"].lower()
        assert data["expert_used"] == "detect"

    def test_count_task_type(self, client, test_image_b64):
        """POST /api/v1/query with task_type=count gets counting response."""
        mock_result = _mock_result(
            answer="There are 5 people in the image",
            expert_used="count",
            confidence=0.90,
            metadata={"count": 5},
        )
        with patch("api.routes.inference.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.camera_manager = None
            manager.submit_task.return_value = mock_result
            mock_mgr.return_value = manager

            resp = client.post("/api/v1/query", json={
                "question": "How many people are there?",
                "image_base64": test_image_b64,
                "task_type": "count",
            })

        assert resp.status_code == 200
        data = resp.json()
        assert data["expert_used"] == "count"
        assert data["confidence"] > 0

    def test_caption_task_type(self, client, test_image_b64):
        """POST /api/v1/query with task_type=caption gets caption response."""
        mock_result = _mock_result(
            answer="A busy city street with cars and pedestrians under a cloudy sky",
            expert_used="caption",
            confidence=0.87,
        )
        with patch("api.routes.inference.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.camera_manager = None
            manager.submit_task.return_value = mock_result
            mock_mgr.return_value = manager

            resp = client.post("/api/v1/query", json={
                "question": "Describe this scene",
                "image_base64": test_image_b64,
                "task_type": "caption",
            })

        assert resp.status_code == 200
        data = resp.json()
        assert data["expert_used"] == "caption"
        assert len(data["answer"]) > 0

    def test_query_without_image_returns_400(self, client):
        """POST /api/v1/query with no image source returns 400."""
        resp = client.post("/api/v1/query", json={
            "question": "What is this?",
        })
        assert resp.status_code == 400


# ---------------------------------------------------------------------------
# 6. Alert rule CRUD: create → list → delete
# ---------------------------------------------------------------------------
class TestAlertCRUDIntegration:
    """Full CRUD cycle for alert rules."""

    def test_alert_rule_crud_lifecycle(self, client):
        """Create an alert rule, verify it in the list, then delete it."""
        # Patch get_model_manager for alerts routes to have an orchestrator
        from agents.mother import MotherOrchestrator

        orchestrator = MotherOrchestrator(max_agents_per_type=2)

        with patch("api.routes.alerts.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.orchestrator = orchestrator
            manager.alert_history = []
            mock_mgr.return_value = manager

            # CREATE
            rule_payload = {
                "rule_id": "integ-test-fire-alert",
                "condition_type": "presence",
                "target_object": "fire",
                "action": "webhook",
            }
            resp = client.post("/api/v1/alerts/rules", json=rule_payload)
            assert resp.status_code == 200
            data = resp.json()
            assert data["rule_id"] == "integ-test-fire-alert"
            assert data["condition_type"] == "presence"
            assert data["target_object"] == "fire"
            assert data["enabled"] is True

            # LIST — verify the rule appears
            resp = client.get("/api/v1/alerts/rules")
            assert resp.status_code == 200
            rules = resp.json()
            assert isinstance(rules, list)
            rule_ids = [r["rule_id"] for r in rules]
            assert "integ-test-fire-alert" in rule_ids

            # DELETE
            resp = client.delete("/api/v1/alerts/rules/integ-test-fire-alert")
            assert resp.status_code == 200
            assert resp.json()["deleted"] == "integ-test-fire-alert"

            # Verify deletion — rule should be gone
            resp = client.get("/api/v1/alerts/rules")
            assert resp.status_code == 200
            rules_after = resp.json()
            rule_ids_after = [r["rule_id"] for r in rules_after]
            assert "integ-test-fire-alert" not in rule_ids_after

    def test_delete_nonexistent_rule_returns_404(self, client):
        """Deleting a rule that doesn't exist returns 404."""
        from agents.mother import MotherOrchestrator

        orchestrator = MotherOrchestrator(max_agents_per_type=2)

        with patch("api.routes.alerts.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.orchestrator = orchestrator
            mock_mgr.return_value = manager

            resp = client.delete("/api/v1/alerts/rules/nonexistent-rule")
            assert resp.status_code == 404

    def test_alert_history_returns_list(self, client):
        """GET /api/v1/alerts/history returns a list."""
        with patch("api.routes.alerts.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.alert_history = []
            mock_mgr.return_value = manager

            resp = client.get("/api/v1/alerts/history")
            assert resp.status_code == 200
            assert isinstance(resp.json(), list)


# ---------------------------------------------------------------------------
# 7. Agent status endpoint returns all 8 agent types
# ---------------------------------------------------------------------------
class TestAgentStatusIntegration:

    def test_agent_types_returns_all_eight(self, client):
        """GET /api/v1/agents/types returns all 8 expert types."""
        resp = client.get("/api/v1/agents/types")
        assert resp.status_code == 200
        data = resp.json()
        expected_types = {"vqa", "detect", "alert", "caption", "track", "count", "ocr", "reason"}
        actual_types = set(data["expert_types"])
        assert expected_types == actual_types

    def test_agents_status_endpoint(self, client):
        """GET /api/v1/agents/status returns proper structure."""
        resp = client.get("/api/v1/agents/status")
        assert resp.status_code == 200
        data = resp.json()
        assert "agents" in data
        assert "total_agents" in data
        assert isinstance(data["agents"], dict)
        assert isinstance(data["total_agents"], int)


# ---------------------------------------------------------------------------
# 8. Streams endpoint returns camera list
# ---------------------------------------------------------------------------
class TestStreamsIntegration:

    def test_streams_status_returns_list(self, client):
        """GET /api/v1/streams/status returns a list (empty when no cameras)."""
        resp = client.get("/api/v1/streams/status")
        assert resp.status_code == 200
        data = resp.json()
        assert isinstance(data, list)

    def test_start_stream_requires_fields(self, client):
        """POST /api/v1/streams/start with missing fields returns 422."""
        resp = client.post("/api/v1/streams/start", json={})
        assert resp.status_code == 422


# ---------------------------------------------------------------------------
# 9. WebSocket /ws/chat connects and can send/receive
# ---------------------------------------------------------------------------
class TestWebSocketIntegration:

    def test_ws_chat_connect_and_send(self, client):
        """WebSocket /ws/chat connects and responds to a question."""
        mock_result = _mock_result(
            answer="The scene shows a parking lot",
            expert_used="vqa",
            confidence=0.80,
        )

        with patch("api.deps.get_model_manager") as mock_mgr:
            manager = MagicMock()
            manager.camera_manager = None
            manager.submit_task.return_value = mock_result
            manager.model = None
            mock_mgr.return_value = manager

            with client.websocket_connect("/ws/chat") as ws:
                ws.send_text(json.dumps({
                    "question": "What is happening here?",
                    "task_type": "vqa",
                }))
                resp = ws.receive_json()
                assert resp["type"] == "answer"
                assert resp["answer"] == "The scene shows a parking lot"
                assert resp["expert_used"] == "vqa"

    def test_ws_chat_missing_question(self, client):
        """WebSocket /ws/chat returns error when question is missing."""
        with client.websocket_connect("/ws/chat") as ws:
            ws.send_text(json.dumps({"task_type": "vqa"}))
            resp = ws.receive_json()
            assert "error" in resp


# ---------------------------------------------------------------------------
# 10. Agent routing: MotherOrchestrator classify_task
# ---------------------------------------------------------------------------
class TestAgentRoutingIntegration:
    """Verify MotherOrchestrator routes queries to the correct agent type."""

    def test_tracking_query_routes_to_track(self):
        """'track the person' routes to TrackingAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_TRACK
        result = classify_task("track the person moving across the room")
        assert result == EXPERT_TRACK

    def test_caption_query_routes_to_caption(self):
        """'describe this scene' routes to CaptionAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_CAPTION
        result = classify_task("describe this scene in detail")
        assert result == EXPERT_CAPTION

    def test_counting_query_routes_to_count(self):
        """'how many cars' routes to CountingAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_COUNT
        result = classify_task("how many cars are in the parking lot")
        assert result == EXPERT_COUNT

    def test_detection_query_routes_to_detect(self):
        """'detect objects' routes to DetectAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_DETECT
        result = classify_task("detect all objects in the frame")
        assert result == EXPERT_DETECT

    def test_alert_query_routes_to_alert(self):
        """'alert for intruder' routes to AlertAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_ALERT
        result = classify_task("alert me if there is an intruder")
        assert result == EXPERT_ALERT

    def test_ocr_query_routes_to_ocr(self):
        """'read the text' routes to OCRAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_OCR
        result = classify_task("read the text on the sign")
        assert result == EXPERT_OCR

    def test_reasoning_query_routes_to_reason(self):
        """'explain why' routes to ReasoningAgent."""
        from agents.mother import classify_task
        from agents.base import EXPERT_REASON
        result = classify_task("explain why the car stopped")
        assert result == EXPERT_REASON

    def test_vqa_fallback(self):
        """Generic question falls back to VQA."""
        from agents.mother import classify_task
        from agents.base import EXPERT_VQA
        result = classify_task("what color is the building")
        assert result == EXPERT_VQA

    def test_orchestrator_classify_method(self):
        """MotherOrchestrator.classify() uses the task query for routing."""
        from agents.mother import MotherOrchestrator
        from agents.base import Task, EXPERT_TRACK

        mother = MotherOrchestrator(max_agents_per_type=2)
        task = Task(
            type="track",
            payload={"image_ref": "/tmp/test.jpg", "query": "track the person"},
            source="test",
            expert_hint="vqa",  # hint says vqa but query says track
        )
        # classify should use the query text, not the hint
        expert = mother.classify(task)
        assert expert == EXPERT_TRACK
        mother.shutdown()