# -*- coding: utf-8 -*-
"""任务中心·扫码接单：TaskService 状态机 + Repository 访问（自包含内存库）。"""
from __future__ import annotations

from contextlib import asynccontextmanager

import pytest
from fastapi import HTTPException
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine

from app.infrastructure.models import Base  # noqa: F401  (注册表到 Base)
from app.infrastructure.repositories import Database
from app.services.task_service import TaskService


@asynccontextmanager
async def _db():
    engine = create_async_engine("sqlite+aiosqlite:///:memory:")
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    Session = async_sessionmaker(engine, expire_on_commit=False)
    async with Session() as session:
        yield Database(session=session)
    await engine.dispose()


def _grab_published(**kw):
    return dict(
        task_code="TK-004-GRAB", title="短视频剪辑", mode="grab",
        status="published", category="技术开发", budget_min=1500, budget_max=3000,
        display_priority=30, **kw,
    )


async def test_claim_marks_claimed_and_records_claim():
    """published + grab → claimed（claimed_by/claimed_at），并写 task_claims 流水。"""
    async with _db() as db:
        t = await db.tasks.create(_grab_published())
        actor = {"id": "u_opc_1", "username": "opc01", "nickname": "阿健"}
        res = await TaskService(db).claim(t["task_code"], actor, source="scan")
        assert res["status"] == "claimed"
        assert res["claimed_by"] == "u_opc_1"
        assert res["claimed_at"]
        claims = await db.task_claims.list_by_task(t["id"])
        assert claims and claims[0]["claim_source"] == "scan"


async def test_claim_disallowed_non_grab_mode():
    """bid 模式不可扫码接单。"""
    async with _db() as db:
        t = await db.tasks.create(_grab_published(title="UI", mode="bid"))
        with pytest.raises(HTTPException):
            await TaskService(db).claim(t["task_code"], {"id": "u1"}, "scan")


async def test_claim_unknown_code_404():
    async with _db() as db:
        with pytest.raises(HTTPException):
            await TaskService(db).claim("TK-NOT-EXIST", {"id": "u1"}, "scan")


async def test_claim_already_claimed_rejected():
    """已 claim 的任务再 claim 应报错。"""
    async with _db() as db:
        t = await db.tasks.create(_grab_published())
        await TaskService(db).claim(t["task_code"], {"id": "u1"}, "scan")
        with pytest.raises(HTTPException):
            await TaskService(db).claim(t["task_code"], {"id": "u2"}, "scan")


async def test_doing_then_complete():
    """claimed → doing → completed。"""
    async with _db() as db:
        t = await db.tasks.create(_grab_published())
        actor = {"id": "u_opc_1", "username": "opc01", "nickname": "阿健"}
        await TaskService(db).claim(t["task_code"], actor, source="scan")
        doing = await TaskService(db).start_doing(t["id"], actor)
        assert doing["status"] == "doing" and doing["doing_at"]
        done = await TaskService(db).complete(t["id"], actor)
        assert done["status"] == "completed"


async def test_list_published_returns_display_fields():
    """大屏取数：list_published 返回新字段且按 display_priority 降序。"""
    async with _db() as db:
        await db.tasks.create(_grab_published(task_code="TK-LOW", display_priority=1))
        await db.tasks.create(_grab_published(task_code="TK-HIGH", display_priority=99))
        items = await db.tasks.list_published()
        codes = [t["task_code"] for t in items]
        assert "TK-LOW" in codes and "TK-HIGH" in codes
        assert codes.index("TK-HIGH") < codes.index("TK-LOW")
        assert all("task_code" in t and "claimed_by" in t for t in items)