from app.search_client import SearchClient


class FakeIndex:
    def __init__(self):
        self.documents = {}
        self.deleted_ids = []

    def add_documents(self, docs):
        for doc in docs:
            self.documents[doc["id"]] = doc

    def delete_document(self, doc_id):
        self.documents.pop(doc_id, None)
        self.deleted_ids.append(doc_id)

    def search(self, query, params=None):
        hits = []
        for doc in self.documents.values():
            if query in doc["content"] or query in doc["title"]:
                formatted = dict(doc)
                if query in doc["content"]:
                    formatted["content"] = doc["content"].replace(query, f"<em>{query}</em>")
                hits.append({**doc, "_formatted": formatted})
        return {"hits": hits}


class FakeMeilisearchSDK:
    def __init__(self):
        self.indexes = {}

    def index(self, name):
        if name not in self.indexes:
            self.indexes[name] = FakeIndex()
        return self.indexes[name]


def test_index_document_adds_document_with_encoded_id():
    sdk = FakeMeilisearchSDK()
    client = SearchClient(sdk, index_name="documents")

    client.index_document(
        "产品文档/架构设计.md", "产品文档", "架构设计.md", "DocHub 使用 MinIO 存储文档"
    )

    index = sdk.indexes["documents"]
    assert len(index.documents) == 1
    stored = list(index.documents.values())[0]
    assert stored["key"] == "产品文档/架构设计.md"
    assert stored["path"] == "产品文档"
    assert stored["title"] == "架构设计.md"
    assert stored["content"] == "DocHub 使用 MinIO 存储文档"


def test_delete_document_removes_document():
    sdk = FakeMeilisearchSDK()
    client = SearchClient(sdk, index_name="documents")
    client.index_document("产品文档/旧文档.md", "产品文档", "旧文档.md", "旧内容")

    client.delete_document("产品文档/旧文档.md")

    index = sdk.indexes["documents"]
    assert index.documents == {}
    assert len(index.deleted_ids) == 1


def test_search_returns_matching_documents_with_highlighted_snippet():
    sdk = FakeMeilisearchSDK()
    client = SearchClient(sdk, index_name="documents")
    client.index_document(
        "产品文档/架构设计.md", "产品文档", "架构设计.md", "DocHub 支持全文检索功能"
    )

    results = client.search("检索")

    assert len(results) == 1
    assert results[0]["key"] == "产品文档/架构设计.md"
    assert results[0]["title"] == "架构设计.md"
    assert results[0]["path"] == "产品文档"
    assert "<em>检索</em>" in results[0]["snippet"]