import unittest

from semantic_index.ingest import BackfillService
from semantic_index.mcp import SemanticMCP
from semantic_index.models import SearchQuery, SearchResult
from semantic_index.redmine import RedmineMapper


class FakeRedmineSource:
    project_identifier = None

    def recent_helpdesk_issues(self, limit):
        return [
            {
                "id": 1,
                "subject": "First",
                "description": "First body",
                "project": {"identifier": self.project_identifier},
            },
            {
                "id": 2,
                "subject": "Second",
                "description": "Second body",
                "project": {"identifier": self.project_identifier},
            },
        ][:limit]


class DuplicateDocumentRedmineSource:
    project_identifier = "customer-service"

    def recent_helpdesk_issues(self, limit):
        return [
            {"id": 1, "subject": "First", "description": "First body", "project": {"identifier": "customer-service"}},
            {"id": 1, "subject": "First duplicate", "description": "Duplicate body", "project": {"identifier": "customer-service"}},
        ][:limit]


class FakeEmbedder:
    def embed_documents(self, docs):
        return [[float(i), 0.0, 0.0] for i, _ in enumerate(docs, start=1)]

    def embed_query(self, text):
        return [0.1, 0.0, 0.0]


class FakeStore:
    def __init__(self):
        self.deleted = []
        self.upserts = []

    def rebuild_source(self, source, docs, vectors, project_identifier=None):
        self.deleted.append((source, project_identifier))
        self.upserts.append((docs, vectors))

    def list_projects(self, source=None, limit=1000):
        return [
            {"project_identifier": "customer-service", "document_count": 1684},
            {"project_identifier": "hiring", "document_count": 409},
        ]


class FakeRefreshService:
    def __init__(self):
        self.calls = []

    def refresh_redmine_project_limits(self, project_limits, dry_run=False, force_rebuild=False, overlap_minutes=15):
        self.calls.append((project_limits, dry_run, force_rebuild, overlap_minutes))
        return {"source": "redmine", "projects": len(project_limits), "dry_run": dry_run}


class FakeSearchService:
    def __init__(self):
        self.queries = []

    def search(self, query):
        self.queries.append(query)
        return [SearchResult(id="doc1", score=0.5, text="Snippet", payload={"redmine_url": "http://redmine/issues/1"})]

    def get_document(self, document_id):
        return {"id": document_id, "text": "Snippet"}


class BackfillAndMCPTest(unittest.TestCase):
    def test_sample_backfill_rebuilds_redmine_source(self):
        service = BackfillService(source=FakeRedmineSource(), embedder=FakeEmbedder(), store=FakeStore())

        result = service.backfill_redmine_sample(limit=2)

        self.assertEqual({"source": "redmine", "issues": 2, "documents": 2}, result)
        self.assertEqual([("redmine", None)], service.store.deleted)
        docs, vectors = service.store.upserts[0]
        self.assertEqual(["redmine:issue:1:chunk:0", "redmine:issue:2:chunk:0"], [doc.id for doc in docs])
        self.assertEqual(2, len(vectors))

    def test_sample_backfill_rebuilds_only_the_configured_project_scope(self):
        store = FakeStore()
        service = BackfillService(
            source=FakeRedmineSource(),
            embedder=FakeEmbedder(),
            store=store,
            mapper=RedmineMapper(redmine_url="", project_identifier="customer-service"),
        )

        service.backfill_redmine_sample(limit=1)

        self.assertEqual([("redmine", "customer-service")], store.deleted)

    def test_multi_project_backfill_rebuilds_each_project_scope(self):
        store = FakeStore()
        service = BackfillService(source=FakeRedmineSource(), embedder=FakeEmbedder(), store=store)

        result = service.backfill_redmine_projects(["customer-service", "hiring"], per_project_limit=1)

        self.assertEqual(
            {
                "source": "redmine",
                "projects": 2,
                "issues": 2,
                "documents": 2,
                "project_results": [
                    {"project_identifier": "customer-service", "issues": 1, "documents": 1},
                    {"project_identifier": "hiring", "issues": 1, "documents": 1},
                ],
            },
            result,
        )
        self.assertEqual([("redmine", "customer-service"), ("redmine", "hiring")], store.deleted)
        self.assertEqual("customer-service", store.upserts[0][0][0].payload["project_identifier"])
        self.assertEqual("hiring", store.upserts[1][0][0].payload["project_identifier"])

    def test_multi_project_backfill_accepts_per_project_limits(self):
        store = FakeStore()
        service = BackfillService(source=FakeRedmineSource(), embedder=FakeEmbedder(), store=store)

        result = service.backfill_redmine_project_limits({"customer-service": 2, "hiring": 1})

        self.assertEqual(3, result["issues"])
        self.assertEqual(
            [
                {"project_identifier": "customer-service", "issues": 2, "documents": 2},
                {"project_identifier": "hiring", "issues": 1, "documents": 1},
            ],
            result["project_results"],
        )

    def test_backfill_deduplicates_documents_by_stable_id_before_embedding(self):
        store = FakeStore()
        service = BackfillService(source=DuplicateDocumentRedmineSource(), embedder=FakeEmbedder(), store=store)

        result = service.backfill_redmine_sample(limit=2)

        self.assertEqual({"source": "redmine", "issues": 2, "documents": 1}, result)
        docs, vectors = store.upserts[0]
        self.assertEqual(["redmine:issue:1:chunk:0"], [doc.id for doc in docs])
        self.assertEqual(1, len(vectors))

    def test_mcp_tools_return_json_ready_results(self):
        search = FakeSearchService()
        refresh = FakeRefreshService()
        mcp = SemanticMCP(search_service=search, backfill_service=None, store=FakeStore(), refresh_service=refresh)

        response = mcp.call_tool("semantic_search", {"query": "printer", "source": "redmine", "project_identifier": "hiring", "limit": 3})
        document = mcp.call_tool("semantic_get_document", {"id": "doc1"})
        projects = mcp.call_tool("semantic_list_projects", {"source": "redmine"})
        refresh_response = mcp.call_tool("semantic_refresh_redmine", {"project_identifier": "customer-service", "limit": 5, "dry_run": True})

        self.assertEqual("printer", response["query"])
        self.assertEqual("hiring", response["filters"]["project_identifier"])
        self.assertEqual("doc1", response["results"][0]["id"])
        self.assertEqual("http://redmine/issues/1", response["results"][0]["citation"]["url"])
        self.assertIsInstance(search.queries[0], SearchQuery)
        self.assertEqual("redmine", search.queries[0].source)
        self.assertEqual("hiring", search.queries[0].project_identifier)
        self.assertEqual({"id": "doc1", "text": "Snippet"}, document)
        self.assertEqual("customer-service", projects["projects"][0]["project_identifier"])
        self.assertTrue(refresh_response["dry_run"])
        self.assertEqual(({"customer-service": 5}, True, False, 15), refresh.calls[0])


if __name__ == "__main__":
    unittest.main()