from types import SimpleNamespace

import pytest
from httpx import ASGITransport, AsyncClient

from app.api.v1.datasource_config import get_ai_provider_client
from app.core.security import get_current_user
from app.core.target_schema_registry import get_target_schema, list_target_schemas
from app.main import app
from app.models.user import User
from app.services.datasource_mapping import execute_mapping, persist_mapped_records, redact_for_llm


SAMPLE_AIS = {
    "data": [
        {
            "mmsi": "257123000",
            "latitude": "59.91",
            "longitude": "10.75",
            "speedOverGround": "12.4",
            "timestamp": "2026-04-28T00:00:00Z",
            "api_token": "secret-value",
        }
    ]
}


def test_registry_exposes_v1_target_schemas():
    keys = {schema["key"] for schema in list_target_schemas()}

    assert {"vessel_ais", "geo_points", "generic_records"}.issubset(keys)
    assert get_target_schema("vessel_ais").destination == "vessel_position"


def test_mapping_engine_maps_and_validates_vessel_ais():
    mapping = {
        "source": {"items_path": "$.data[*]"},
        "fields": {
            "mmsi": {"path": "$.mmsi", "type": "integer"},
            "lat": {"path": "$.latitude", "type": "float"},
            "lon": {"path": "$.longitude", "type": "float"},
            "sog": {"path": "$.speedOverGround", "type": "float"},
            "received_at": {"path": "$.timestamp", "type": "datetime"},
        },
    }

    result = execute_mapping(SAMPLE_AIS, mapping, "vessel_ais")

    assert result["mapped_count"] == 1
    assert result["failed_count"] == 0
    assert result["records"][0]["mmsi"] == 257123000
    assert result["records"][0]["lat"] == 59.91


def test_mapping_engine_reports_schema_errors():
    mapping = {
        "source": {"items_path": "$.data[*]"},
        "fields": {
            "mmsi": {"path": "$.mmsi", "type": "integer"},
            "lat": {"path": "$.missing_lat", "type": "float"},
            "lon": {"path": "$.longitude", "type": "float"},
        },
    }

    result = execute_mapping(SAMPLE_AIS, mapping, "vessel_ais")

    assert result["mapped_count"] == 0
    assert result["failed_count"] == 1
    assert any("lat" in error for error in result["errors"][0]["errors"])


def test_redact_for_llm_masks_secret_like_fields():
    redacted = redact_for_llm(SAMPLE_AIS)

    assert redacted["data"][0]["api_token"] == "[REDACTED]"


@pytest.mark.asyncio
async def test_persist_mapped_records_writes_generic_records():
    class FakeDB:
        def __init__(self):
            self.added = []
            self.committed = False

        def add(self, value):
            self.added.append(value)

        async def commit(self):
            self.committed = True

    db = FakeDB()

    count = await persist_mapped_records(
        db,
        datasource_name="custom_weather",
        datasource_config_id=42,
        target_schema="generic_records",
        records=[{"source_id": "row-1", "data": {"temp": 25}}],
        mapping_version=3,
    )

    assert count == 1
    assert db.committed is True
    assert db.added[0].source == "custom_weather"
    assert db.added[0].data_type == "generic_records"
    assert db.added[0].extra_data["mapping_version"] == 3


@pytest.mark.asyncio
async def test_mapping_preview_api_uses_deterministic_engine():
    def override_get_current_user():
        return User(
            id=1,
            username="testuser",
            email="test@example.com",
            password_hash="hashed",
            role="admin",
            is_active=True,
        )

    app.dependency_overrides = {get_current_user: override_get_current_user}
    transport = ASGITransport(app=app)
    try:
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.post(
                "/api/v1/datasources/mappings/preview",
                json={
                    "sample_payload": SAMPLE_AIS,
                    "target_schema": "vessel_ais",
                    "mapping_json": {
                        "source": {"items_path": "$.data[*]"},
                        "fields": {
                            "mmsi": {"path": "$.mmsi", "type": "integer"},
                            "lat": {"path": "$.latitude", "type": "float"},
                            "lon": {"path": "$.longitude", "type": "float"},
                        },
                    },
                },
            )
    finally:
        app.dependency_overrides.clear()

    assert response.status_code == 200
    payload = response.json()
    assert payload["success"] is True
    assert payload["preview"]["records"][0]["mmsi"] == 257123000


@pytest.mark.asyncio
async def test_mapping_propose_api_redacts_sample_before_ai():
    seen_context = {}

    class FakeAIClient:
        async def analyze(self, request, request_id=None):
            seen_context.update(request.context)
            return SimpleNamespace(
                content=(
                    '{"source":{"items_path":"$.data[*]"},"fields":{'
                    '"mmsi":{"path":"$.mmsi","type":"integer"},'
                    '"lat":{"path":"$.latitude","type":"float"},'
                    '"lon":{"path":"$.longitude","type":"float"}}}'
                )
            )

    def override_get_current_user():
        return User(
            id=1,
            username="testuser",
            email="test@example.com",
            password_hash="hashed",
            role="admin",
            is_active=True,
        )

    def override_ai_client():
        return FakeAIClient()

    app.dependency_overrides = {
        get_current_user: override_get_current_user,
        get_ai_provider_client: override_ai_client,
    }
    transport = ASGITransport(app=app)
    try:
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.post(
                "/api/v1/datasources/mappings/propose",
                json={
                    "sample_payload": SAMPLE_AIS,
                    "target_schema": "vessel_ais",
                    "use_ai": True,
                },
            )
    finally:
        app.dependency_overrides.clear()

    assert response.status_code == 200
    payload = response.json()
    assert payload["mapping_json"]["meta"]["generated_by"] == "ai_provider"
    assert seen_context["sample_payload"]["data"][0]["api_token"] == "[REDACTED]"