"""Integration tests for the OpenAPI import pipeline orchestrator.

Tests the full pipeline: fetch -> validate -> parse -> classify.
Uses mocked HTTP and mocked LLM classifier.

RED phase: written before implementation.
"""

from __future__ import annotations

from unittest.mock import patch

import pytest

from app.openapi.models import ImportJob

pytestmark = pytest.mark.integration

_VALID_SPEC_JSON = """{
  "openapi": "3.0.0",
  "info": {"title": "Test API", "version": "1.0.0"},
  "paths": {
    "/orders": {
      "get": {
        "operationId": "list_orders",
        "summary": "List orders",
        "description": "Returns all orders",
        "responses": {"200": {"description": "OK"}}
      }
    },
    "/orders/{id}": {
      "delete": {
        "operationId": "delete_order",
        "summary": "Delete order",
        "description": "Deletes an order",
        "parameters": [
          {"name": "id", "in": "path", "required": true, "schema": {"type": "string"}}
        ],
        "responses": {"204": {"description": "Deleted"}}
      }
    }
  }
}"""

_INVALID_SPEC_JSON = '{"not": "a valid openapi spec"}'

_PUBLIC_IP = "93.184.216.34"


@pytest.fixture
def mock_classifier():
    """A mock classifier that classifies using heuristics."""
    from app.openapi.classifier import HeuristicClassifier

    return HeuristicClassifier()


@pytest.fixture
def orchestrator(mock_classifier):
    """Create an ImportOrchestrator with the mock classifier."""
    from app.openapi.importer import ImportOrchestrator

    return ImportOrchestrator(classifier=mock_classifier)


class TestImportOrchestratorSuccess:
    """Tests for successful import pipeline flows."""

    @pytest.mark.usefixtures("_mock_public_dns")
    async def test_full_pipeline_succeeds(self, orchestrator, httpx_mock) -> None:
        """Full pipeline with valid spec and mocked HTTP succeeds."""
        httpx_mock.add_response(
            url="https://example.com/api/spec.json",
            text=_VALID_SPEC_JSON,
            headers={"content-type": "application/json"},
        )
        job = await orchestrator.start_import(
            url="https://example.com/api/spec.json",
            job_id="test-job-1",
            on_progress=None,
        )
        assert isinstance(job, ImportJob)
        assert job.status == "done"
        assert job.job_id == "test-job-1"
        assert job.total_endpoints == 2
        assert job.classified_count == 2
        assert job.error_message is None

    @pytest.mark.usefixtures("_mock_public_dns")
    async def test_progress_callback_called_at_stages(self, orchestrator, httpx_mock) -> None:
        """on_progress callback is called at each pipeline stage."""
        httpx_mock.add_response(
            url="https://example.com/api/spec.json",
            text=_VALID_SPEC_JSON,
            headers={"content-type": "application/json"},
        )
        stages_seen: list[str] = []

        def on_progress(stage: str, job: ImportJob) -> None:
            stages_seen.append(stage)

        await orchestrator.start_import(
            url="https://example.com/api/spec.json",
            job_id="test-job-2",
            on_progress=on_progress,
        )
        assert "fetching" in stages_seen
        assert "validating" in stages_seen
        assert "parsing" in stages_seen
        assert "classifying" in stages_seen

    @pytest.mark.usefixtures("_mock_public_dns")
    async def test_none_progress_callback_does_not_raise(
        self, orchestrator, httpx_mock
    ) -> None:
        """Passing None as on_progress does not raise."""
        httpx_mock.add_response(
            url="https://example.com/api/spec.json",
            text=_VALID_SPEC_JSON,
            headers={"content-type": "application/json"},
        )
        job = await orchestrator.start_import(
            url="https://example.com/api/spec.json",
            job_id="test-job-3",
            on_progress=None,
        )
        assert job.status == "done"


class TestImportOrchestratorFailures:
    """Tests for error handling in the import pipeline."""

    async def test_fetch_failure_sets_failed_status(self, orchestrator) -> None:
        """When HTTP fetch fails, job status is 'failed'."""
        with patch("app.openapi.ssrf.resolve_hostname", return_value=["10.0.0.1"]):
            job = await orchestrator.start_import(
                url="http://internal.corp/spec.json",
                job_id="test-job-fail-1",
                on_progress=None,
            )
        assert job.status == "failed"
        assert job.error_message is not None

    @pytest.mark.usefixtures("_mock_public_dns")
    async def test_validation_failure_sets_failed_status(
        self, orchestrator, httpx_mock
    ) -> None:
        """When spec validation fails, job status is 'failed'."""
        httpx_mock.add_response(
            url="https://example.com/api/bad.json",
            text=_INVALID_SPEC_JSON,
            headers={"content-type": "application/json"},
        )
        job = await orchestrator.start_import(
            url="https://example.com/api/bad.json",
            job_id="test-job-fail-2",
            on_progress=None,
        )
        assert job.status == "failed"
        assert job.error_message is not None

    @pytest.mark.usefixtures("_mock_public_dns")
    async def test_error_message_is_descriptive(self, orchestrator, httpx_mock) -> None:
        """Error message contains useful context."""
        httpx_mock.add_response(
            url="https://example.com/api/bad.json",
            text=_INVALID_SPEC_JSON,
            headers={"content-type": "application/json"},
        )
        job = await orchestrator.start_import(
            url="https://example.com/api/bad.json",
            job_id="test-job-fail-3",
            on_progress=None,
        )
        assert len(job.error_message) > 0

    @pytest.mark.usefixtures("_mock_public_dns")
    async def test_failed_status_progress_called_with_failed(
        self, orchestrator, httpx_mock
    ) -> None:
        """When pipeline fails, on_progress is called with 'failed' stage."""
        httpx_mock.add_response(
            url="https://example.com/api/bad.json",
            text=_INVALID_SPEC_JSON,
            headers={"content-type": "application/json"},
        )
        stages_seen: list[str] = []

        def on_progress(stage: str, job: ImportJob) -> None:
            stages_seen.append(stage)

        await orchestrator.start_import(
            url="https://example.com/api/bad.json",
            job_id="test-job-fail-4",
            on_progress=on_progress,
        )
        assert "failed" in stages_seen


@pytest.fixture
def _mock_public_dns():
    with patch("app.openapi.ssrf.resolve_hostname", return_value=[_PUBLIC_IP]):
        yield