from datetime import date


def payload(name="API 任务"):
    return {"name": name, "startDate": "2026-08-01", "priority": 3, "metrics": [{"name": "完成", "kind": "checkin", "period": "day"}]}


def test_api_crud_order_layout_and_daily(client):
    response = client.get("/api/health"); assert response.status_code == 200
    assert client.get("/api/layouts/home").json()["page"] == "home"
    first = client.post("/api/tasks", json=payload("第一项")); assert first.status_code == 201
    second = client.post("/api/tasks", json=payload("第二项")).json()
    task = first.json(); metric_id = task["metrics"][0]["metricId"]
    listed = client.get("/api/tasks").json(); assert len(listed["items"]) == 2
    reordered = client.put("/api/tasks/reorder/all", json={"taskIds": [second["taskId"], task["taskId"]], "expectedVersion": listed["version"]})
    assert reordered.status_code == 200
    saved = client.put(f"/api/tasks/{task['taskId']}/daily/2026-08-20", json={"values": [{"metricId": metric_id, "value": 1}], "note": "完成"})
    assert saved.status_code == 200
    assert client.get(f"/api/tasks/{task['taskId']}/history?start=2026-08-20&end=2026-08-20").json()["records"]


def test_summary_endpoints(client):
    task = client.post("/api/tasks", json=payload("周期任务")).json()
    metric_id = task["metrics"][0]["metricId"]
    client.put(f"/api/tasks/{task['taskId']}/daily/2026-08-20", json={"expectedVersion": 0, "values": [{"metricId": metric_id, "value": 1}]})

    scoped = client.get(f"/api/tasks/{task['taskId']}/summary?date=2026-08-20").json()
    assert scoped["tasks"][task["taskId"]]["metrics"][0]["value"] == 1
    assert scoped["tasks"][task["taskId"]]["today"]["recorded"] is True

    assert client.get("/api/summary?date=2026-08-21").json()["tasks"][task["taskId"]]["metrics"][0]["value"] == 0


def test_first_daily_write_is_accepted(client):
    task = client.post("/api/tasks", json=payload("首次记录")).json()
    metric_id = task["metrics"][0]["metricId"]
    current = client.get(f"/api/tasks/{task['taskId']}/daily/2026-08-20").json()
    saved = client.put(
        f"/api/tasks/{task['taskId']}/daily/2026-08-20",
        json={"expectedVersion": current["version"], "values": [{"metricId": metric_id, "value": 1}]},
    )
    assert saved.status_code == 200, saved.text


def test_invalid_input_and_auth(auth_client):
    assert auth_client.get("/api/tasks").status_code == 401
    login = auth_client.post("/api/auth/login", json={"password": "secret"}); assert login.status_code == 200
    assert auth_client.get("/api/tasks").status_code == 200
    csrf = login.json()["csrfToken"]
    bad = auth_client.post("/api/tasks", json={"name": "", "startDate": "2026-08-01", "metrics": []}, headers={"X-CSRF-Token": csrf})
    assert bad.status_code == 422
    forbidden = auth_client.post("/api/tasks", json=payload())
    assert forbidden.status_code == 403


def test_duration_unit_and_backfill(client):
    task = client.post("/api/tasks", json={
        "name": "时长任务", "startDate": "2026-08-01",
        "metrics": [{"name": "专注", "kind": "duration", "period": "day", "durationUnit": "minute", "target": 120}],
    }).json()
    assert task["metrics"][0]["durationUnit"] == "minute"
    metric_id = task["metrics"][0]["metricId"]
    saved = client.put(f"/api/tasks/{task['taskId']}/daily/2026-08-10", json={"expectedVersion": 0, "values": [{"metricId": metric_id, "value": 3600}]})
    assert saved.status_code == 200
    summary = client.get(f"/api/tasks/{task['taskId']}/summary?date=2026-08-10").json()
    metric = summary["tasks"][task["taskId"]]["metrics"][0]
    assert metric["value"] == 3600, "时长仍以整数秒存储"
    assert metric.get("durationUnit") == "minute"


def test_invalid_duration_unit_rejected(client):
    bad = client.post("/api/tasks", json={"name": "非法单位", "startDate": "2026-08-01", "metrics": [{"name": "x", "kind": "duration", "period": "day", "durationUnit": "year"}]})
    assert bad.status_code == 422


def test_task_without_dates(client):
    task = client.post("/api/tasks", json={"name": "无日期任务", "metrics": [{"name": "完成", "kind": "checkin", "period": "day"}]}).json()
    assert task["startDate"] is None and task["endDate"] is None
    # 无开始日期的 lifetime 统计不应报错
    assert client.get(f"/api/tasks/{task['taskId']}/summary").status_code == 200


def test_admin_stats_and_import(client):
    task = client.post("/api/tasks", json=payload("导入任务")).json()
    metric_id = task["metrics"][0]["metricId"]
    client.put(f"/api/tasks/{task['taskId']}/daily/2026-08-20", json={"expectedVersion": 0, "values": [{"metricId": metric_id, "value": 1}]})
    stats = client.get("/api/admin/stats").json()
    assert stats["taskCount"] == 1 and stats["dailyFactCount"] == 1
    exported = client.get("/api/export").json()
    imported = client.post("/api/admin/import", json=exported)
    assert imported.status_code == 200 and imported.json()["imported"] == 1
    assert client.get("/api/admin/stats").json()["taskCount"] == 1