import pytest
from django.core.files.uploadedfile import SimpleUploadedFile
from django.urls import reverse

from review_agent.knowledge_base import build_knowledge_base_context, delete_document, search_knowledge_base
from review_agent.models import KnowledgeBaseDocument


pytestmark = pytest.mark.django_db


def test_knowledge_base_context_reports_rule_and_sources():
    context = build_knowledge_base_context()

    assert context["rule"]["code"] == "nmpa_ivd_registration_v1"
    assert context["rule"]["requirement_count"] > 0
    assert context["source_count"] > 0
    assert context["collection_name"] == "nmpa_ivd_registration_v1"


def test_knowledge_base_page_requires_login(client):
    response = client.get(reverse("knowledge_base_manager"))

    assert response.status_code == 302


def test_knowledge_base_page_renders_for_user(client, django_user_model):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    client.force_login(user)

    response = client.get(reverse("knowledge_base_manager"))

    assert response.status_code == 200
    assert "知识库管理" in response.content.decode("utf-8")
    assert "RAG 检索测试" in response.content.decode("utf-8")
    content = response.content.decode("utf-8")
    tabbar = content[content.index('<div class="tabbar"') : content.index("</div>", content.index('<div class="tabbar"'))]
    assert tabbar.index("审核智能体") < tabbar.index("知识库管理") < tabbar.index("附件管理")


def test_knowledge_base_status_api(client, django_user_model):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    client.force_login(user)

    response = client.get(reverse("knowledge_base_status"))

    assert response.status_code == 200
    assert response.json()["rule"]["code"] == "nmpa_ivd_registration_v1"


def test_knowledge_base_search_rejects_blank_query():
    payload = search_knowledge_base("")

    assert payload["results"] == []
    assert "请输入" in payload["error_message"]


def test_knowledge_base_search_filters_deleted_managed_documents(monkeypatch, django_user_model):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    deleted_document = KnowledgeBaseDocument.objects.create(
        user=user,
        display_name="孙之烨简历",
        original_name="孙之烨-260510.pdf",
        storage_path="knowledge_base/resume.pdf",
        file_size=1,
        status=KnowledgeBaseDocument.Status.DELETED,
        is_active=False,
        indexed_chunk_count=7,
    )

    monkeypatch.setattr(
        "review_agent.knowledge_base.retrieve_citations",
        lambda *args, **kwargs: [
            {
                "source": "用户知识库/1/1/孙之烨-260510.pdf",
                "text": "孙之烨负责审核智能体项目。",
                "score": 0.2,
                "metadata": {"source_type": "managed_document", "document_id": deleted_document.pk},
            },
            {
                "source": "法规材料.doc",
                "text": "注册检验报告要求。",
                "score": 0.3,
                "metadata": {"source_type": "regulatory_document"},
            },
        ],
    )

    payload = search_knowledge_base("孙之烨是谁")

    assert [item["source"] for item in payload["results"]] == ["法规材料.doc"]


def test_knowledge_base_search_api_returns_payload(client, django_user_model):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    client.force_login(user)

    response = client.post(reverse("knowledge_base_search"), {"query": "注册检验报告要求"})

    assert response.status_code == 200
    assert set(response.json()) == {"query", "results", "error_message"}


def test_knowledge_base_document_crud_api(client, settings, tmp_path, django_user_model):
    settings.MEDIA_ROOT = tmp_path
    user = django_user_model.objects.create_user(username="owner", password="pass")
    client.force_login(user)

    upload_response = client.post(
        reverse("knowledge_base_document_list"),
        {
            "display_name": "注册检验报告要求",
            "description": "用于法规依据检索",
            "is_active": "true",
            "file": SimpleUploadedFile("report.md", b"# report", content_type="text/markdown"),
        },
    )

    assert upload_response.status_code == 200
    document_id = upload_response.json()["document"]["id"]
    document = KnowledgeBaseDocument.objects.get(pk=document_id)
    assert document.display_name == "注册检验报告要求"
    assert document.indexed_chunk_count > 0

    list_response = client.get(reverse("knowledge_base_document_list"))
    assert list_response.status_code == 200
    assert list_response.json()["documents"][0]["display_name"] == "注册检验报告要求"

    detail_response = client.get(reverse("knowledge_base_document_detail", args=[document_id]))
    assert detail_response.status_code == 200
    assert detail_response.json()["document"]["original_name"] == "report.md"
    assert "已入库" in detail_response.json()["document"]["indexed_label"]

    patch_response = client.patch(
        reverse("knowledge_base_document_detail", args=[document_id]),
        data='{"display_name": "更新后的法规材料", "is_active": false}',
        content_type="application/json",
    )

    assert patch_response.status_code == 200
    assert patch_response.json()["document"]["display_name"] == "更新后的法规材料"
    assert patch_response.json()["document"]["is_active"] is False

    delete_response = client.delete(reverse("knowledge_base_document_detail", args=[document_id]))

    assert delete_response.status_code == 200
    assert KnowledgeBaseDocument.objects.get(pk=document_id).status == KnowledgeBaseDocument.Status.DELETED


def test_delete_document_removes_managed_chunks_from_index(monkeypatch, django_user_model):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    document = KnowledgeBaseDocument.objects.create(
        user=user,
        display_name="孙之烨简历",
        original_name="孙之烨-260510.pdf",
        storage_path="knowledge_base/resume.pdf",
        file_size=1,
        indexed_chunk_count=7,
        metadata={"index_status": "indexed", "index_error": ""},
    )
    deleted_filters = []

    class FakeCollection:
        def delete(self, where):
            deleted_filters.append(where)

    monkeypatch.setattr("review_agent.knowledge_base._load_chroma_collection", lambda: FakeCollection())

    delete_document(document)

    document.refresh_from_db()
    assert document.status == KnowledgeBaseDocument.Status.DELETED
    assert document.is_active is False
    assert document.indexed_chunk_count == 0
    assert document.metadata["index_status"] == "deleted"
    assert deleted_filters == [{"document_id": document.pk}]


def test_knowledge_base_document_api_is_scoped_to_owner(client, django_user_model):
    owner = django_user_model.objects.create_user(username="owner", password="pass")
    other = django_user_model.objects.create_user(username="other", password="pass")
    document = KnowledgeBaseDocument.objects.create(
        user=owner,
        display_name="法规材料",
        original_name="a.md",
        storage_path="knowledge_base/a.md",
        file_size=1,
    )
    client.force_login(other)

    response = client.patch(
        reverse("knowledge_base_document_detail", args=[document.pk]),
        data='{"display_name": "越权修改"}',
        content_type="application/json",
    )

    assert response.status_code == 404


def test_knowledge_base_document_manual_index_api(client, settings, tmp_path, django_user_model):
    settings.MEDIA_ROOT = tmp_path
    user = django_user_model.objects.create_user(username="owner", password="pass")
    client.force_login(user)
    source_path = tmp_path / "manual.md"
    source_path.write_text("# manual\n注册检验报告要求", encoding="utf-8")
    document = KnowledgeBaseDocument.objects.create(
        user=user,
        display_name="manual.md",
        original_name="manual.md",
        storage_path=str(source_path),
        file_size=source_path.stat().st_size,
        indexed_chunk_count=0,
    )

    response = client.post(reverse("knowledge_base_document_index", args=[document.pk]))

    assert response.status_code == 200
    document.refresh_from_db()
    assert document.indexed_chunk_count > 0
    assert "已入库" in response.json()["document"]["indexed_label"]