from __future__ import annotations

from datetime import UTC, date, datetime
from decimal import Decimal

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

from app.db.base import Base
from app.models.employee import Employee
from app.models.financial_record import ExpenseClaim, ExpenseClaimItem
from app.schemas.orchestrator import OrchestratorRequest
from app.services.agent_conversations import AgentConversationService
from app.services.orchestrator import OrchestratorService


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_review_next_step_run_submits_existing_claim_and_returns_draft_payload(
    monkeypatch,
) -> None:
    monkeypatch.setattr(
        "app.services.runtime_chat.RuntimeChatService.complete",
        lambda *_args, **_kwargs: None,
    )
    session_factory = build_session_factory()
    with session_factory() as db:
        manager = Employee(
            employee_no="E9000",
            name="李经理",
            email="manager-next@example.com",
        )
        employee = Employee(
            employee_no="E9001",
            name="张三",
            email="emp-next@example.com",
            manager=manager,
        )
        claim = ExpenseClaim(
            id="claim-next-step",
            claim_no="EXP-202605-001",
            employee=employee,
            employee_id=employee.id,
            employee_name="张三",
            department_name="销售部",
            expense_type="office",
            reason="采购办公用品",
            location="上海",
            amount=Decimal("128.00"),
            currency="CNY",
            invoice_count=1,
            occurred_at=datetime(2026, 5, 20, 9, 0, tzinfo=UTC),
            status="draft",
            approval_stage="待提交",
            items=[
                ExpenseClaimItem(
                    item_date=date(2026, 5, 20),
                    item_type="office",
                    item_reason="采购办公用品",
                    item_location="上海",
                    item_amount=Decimal("128.00"),
                    invoice_id="office-invoice.png",
                )
            ],
        )
        db.add_all([manager, employee, claim])
        db.commit()

        response = OrchestratorService(db).run(
            OrchestratorRequest(
                source="user_message",
                user_id="emp-next@example.com",
                message="我已核对右侧识别结果，请进入下一步。",
                context_json={
                    "review_action": "next_step",
                    "draft_claim_id": claim.id,
                    "attachment_count": 1,
                    "name": "张三",
                },
            )
        )

        db.refresh(claim)
        assert response.status == "succeeded"
        assert response.requires_confirmation is False
        assert response.result["draft_payload"]["status"] == "submitted"
        assert response.result["draft_payload"]["approval_stage"] == "直属领导审批"
        assert claim.status == "submitted"
        assert claim.approval_stage == "直属领导审批"
        assert claim.submitted_at is not None
        assert response.conversation_id
        assert AgentConversationService(db).get_conversation(response.conversation_id) is None


def test_review_next_step_blocked_returns_reasons_and_removes_next_step_action(
    monkeypatch,
) -> None:
    monkeypatch.setattr(
        "app.services.runtime_chat.RuntimeChatService.complete",
        lambda *_args, **_kwargs: None,
    )
    session_factory = build_session_factory()
    with session_factory() as db:
        employee = Employee(
            employee_no="E9011",
            name="张三",
            email="emp-blocked@example.com",
        )
        claim = ExpenseClaim(
            id="claim-next-step-blocked",
            claim_no="EXP-202605-002",
            employee=employee,
            employee_id=employee.id,
            employee_name="张三",
            department_name="待补充",
            expense_type="office",
            reason="采购办公用品",
            location="上海",
            amount=Decimal("128.00"),
            currency="CNY",
            invoice_count=1,
            occurred_at=datetime(2026, 5, 20, 9, 0, tzinfo=UTC),
            status="draft",
            approval_stage="待提交",
            items=[
                ExpenseClaimItem(
                    item_date=date(2026, 5, 20),
                    item_type="office",
                    item_reason="采购办公用品",
                    item_location="上海",
                    item_amount=Decimal("128.00"),
                    invoice_id="office-invoice.png",
                )
            ],
        )
        db.add_all([employee, claim])
        db.commit()

        response = OrchestratorService(db).run(
            OrchestratorRequest(
                source="user_message",
                user_id="emp-blocked@example.com",
                message="我已核对右侧识别结果，请进入下一步。",
                context_json={
                    "review_action": "next_step",
                    "draft_claim_id": claim.id,
                    "attachment_count": 1,
                    "name": "张三",
                },
            )
        )

        result = response.result
        review_payload = result["review_payload"]
        actions = {
            str(item.get("action_type") or "").strip()
            for item in review_payload["confirmation_actions"]
        }

        assert response.status == "succeeded"
        assert result["draft_payload"]["status"] == "draft"
        assert response.conversation_id
        assert AgentConversationService(db).get_conversation(response.conversation_id) is not None
        assert "AI预审暂未通过" in result["answer"]
        assert "所属部门未完善" in result["answer"]
        assert "next_step" not in actions
        assert "save_draft" in actions
        assert any(
            "所属部门未完善" in str(item.get("content") or "")
            for item in review_payload["risk_briefs"]
        )