from __future__ import annotations

from datetime import UTC, datetime, timedelta

from sqlalchemy import create_engine
from sqlalchemy.orm import Session, sessionmaker
from sqlalchemy.pool import StaticPool

from app.db.base import Base
from app.schemas.ontology import OntologyParseRequest
from app.schemas.user_agent import UserAgentRequest
from app.services.ontology import SemanticOntologyService
from app.services.user_agent import UserAgentService


def build_session_factory() -> sessionmaker[Session]:
    engine = create_engine(
        "sqlite+pysqlite:///:memory:",
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
    )
    Base.metadata.create_all(bind=engine)
    return sessionmaker(bind=engine, autoflush=False, autocommit=False)


def test_user_agent_query_returns_readable_answer_and_actions() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="张三 4 月差旅报销金额是多少",
                user_id="pytest",
            )
        )
        response = UserAgentService(db).respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="张三 4 月差旅报销金额是多少",
                ontology=ontology,
                tool_payload={"record_count": 2, "total_amount": 8800.0},
            )
        )

        assert "8800.00" in response.answer
        assert len(response.suggested_actions) >= 1


def test_user_agent_prefers_runtime_model_answer_when_available(monkeypatch) -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="张三 4 月差旅报销金额是多少",
                user_id="pytest",
            )
        )
        service = UserAgentService(db)
        monkeypatch.setattr(
            service,
            "_generate_answer_with_model",
            lambda *args, **kwargs: "这是模型回答",
        )

        response = service.respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="张三 4 月差旅报销金额是多少",
                ontology=ontology,
                tool_payload={"record_count": 2, "total_amount": 8800.0},
            )
        )

        assert response.answer == "这是模型回答"


def test_user_agent_sanitizes_model_thinking_blocks() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        service = UserAgentService(db)

        assert (
            service._sanitize_model_answer("<think>内部推理</think>\n最终答复")
            == "最终答复"
        )


def test_user_agent_guides_generic_expense_request() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="我要报销",
                user_id="pytest",
            )
        )
        response = UserAgentService(db).respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="我要报销",
                ontology=ontology,
                tool_payload={"record_count": 9, "total_amount": 12345.0},
            )
        )

        assert response.review_payload is not None
        assert response.answer == response.review_payload.body_message
        assert response.review_payload.can_proceed is False
        assert response.review_payload.missing_slots == [
            "报销类型",
            "发生时间",
            "金额",
            "事由说明",
            "票据附件",
        ]
        assert [item.action_type for item in response.review_payload.confirmation_actions] == [
            "cancel_review",
            "edit_review",
            "save_draft",
        ]


def test_user_agent_guides_implicit_expense_draft_request() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        today = datetime.now(UTC).date().isoformat()
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="我今天去客户现场，招待了客户，花销了1000元",
                user_id="pytest",
            )
        )
        response = UserAgentService(db).respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="我今天去客户现场，招待了客户，花销了1000元",
                ontology=ontology,
                tool_payload={"draft_only": True},
            )
        )

        assert response.review_payload is not None
        assert response.answer == response.review_payload.body_message
        assert response.review_payload.intent_summary.startswith("系统识别出您想要报销业务招待费。")
        assert response.review_payload.missing_slots == ["客户名称", "参与人员", "票据附件"]
        assert [item.action_type for item in response.review_payload.confirmation_actions] == [
            "cancel_review",
            "edit_review",
            "save_draft",
        ]

        slot_map = {item.key: item for item in response.review_payload.slot_cards}
        assert slot_map["expense_type"].value == "业务招待费"
        assert slot_map["time_range"].value == f"{today}（原文：今天）"
        assert slot_map["location"].value == "客户现场"
        assert slot_map["amount"].value == "1000.00元"


def test_user_agent_risk_response_includes_rule_citations() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="检查重复报销风险",
                user_id="pytest",
            )
        )
        response = UserAgentService(db).respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="检查重复报销风险",
                ontology=ontology,
                tool_payload={"risk_flags": ["duplicate_expense"]},
            )
        )

        assert response.risk_flags == ["duplicate_expense"]
        assert any(item.source_type == "rule" for item in response.citations)
        assert "duplicate_expense" in response.answer


def test_user_agent_draft_returns_structured_payload() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="帮我生成张三4月差旅报销草稿",
                user_id="pytest",
            )
        )
        response = UserAgentService(db).respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="帮我生成张三4月差旅报销草稿",
                ontology=ontology,
                tool_payload={"draft_only": True},
            )
        )

        assert response.draft_payload is not None
        assert response.draft_payload.confirmation_required is True
        assert response.review_payload is not None
        assert response.review_payload.can_proceed is False
        assert response.review_payload.missing_slots == ["金额", "事由说明", "票据附件"]
        assert [item.action_type for item in response.review_payload.confirmation_actions] == [
            "cancel_review",
            "edit_review",
            "save_draft",
        ]
        assert response.answer == response.review_payload.body_message


def test_user_agent_builds_review_payload_for_multi_document_expense_flow() -> None:
    session_factory = build_session_factory()
    with session_factory() as db:
        yesterday = (datetime.now(UTC).date() - timedelta(days=1)).isoformat()
        ontology = SemanticOntologyService(db).parse(
            OntologyParseRequest(
                query="我昨天去上海出差，还请客户A吃饭，帮我生成报销草稿",
                user_id="pytest",
                context_json={
                    "attachment_names": ["机票行程单.png", "餐饮发票.jpg"],
                    "attachment_count": 2,
                    "ocr_documents": [
                        {
                            "filename": "机票行程单.png",
                            "summary": "机票行程单 上海-北京 金额 680 元",
                            "text": "机票行程单 上海-北京 金额 680 元",
                            "avg_score": 0.93,
                            "warnings": [],
                        },
                        {
                            "filename": "餐饮发票.jpg",
                            "summary": "餐饮发票 客户招待 金额 320 元",
                            "text": "餐饮发票 客户招待 金额 320 元",
                            "avg_score": 0.91,
                            "warnings": [],
                        },
                    ],
                },
            )
        )
        response = UserAgentService(db).respond(
            UserAgentRequest(
                run_id=ontology.run_id,
                user_id="pytest",
                message="我昨天去上海出差，还请客户A吃饭，帮我生成报销草稿",
                ontology=ontology,
                context_json={
                    "name": "张三",
                    "attachment_names": ["机票行程单.png", "餐饮发票.jpg"],
                    "attachment_count": 2,
                    "ocr_documents": [
                        {
                            "filename": "机票行程单.png",
                            "summary": "机票行程单 上海-北京 金额 680 元",
                            "text": "机票行程单 上海-北京 金额 680 元",
                            "avg_score": 0.93,
                            "warnings": [],
                        },
                        {
                            "filename": "餐饮发票.jpg",
                            "summary": "餐饮发票 客户招待 金额 320 元",
                            "text": "餐饮发票 客户招待 金额 320 元",
                            "avg_score": 0.91,
                            "warnings": [],
                        },
                    ],
                },
                tool_payload={"draft_only": True, "claim_no": "EXP-202605-009", "status": "draft"},
            )
        )

        assert response.review_payload is not None
        assert len(response.review_payload.document_cards) == 2
        assert len(response.review_payload.claim_groups) == 2
        assert response.review_payload.missing_slots == ["参与人员"]
        assert [item.action_type for item in response.review_payload.confirmation_actions] == [
            "cancel_review",
            "edit_review",
            "save_draft",
        ]
        assert any(item.scene_label == "业务招待费" for item in response.review_payload.document_cards)
        assert "建议拆分为 2 张报销单" in response.review_payload.intent_summary
        assert f"{yesterday}（原文：昨天）" in response.review_payload.intent_summary