"""网关 API 数据模型：请求体与响应体

intent 字段刻意保留成 `dict[str, Any]`——网关不解释下单意图，结构由 trading 侧
定义。网关只负责把它存下来、原样吐给 worker，避免业务规则悄悄渗进任务队列。
"""
from __future__ import annotations

from typing import Any

from pydantic import BaseModel, Field

from app.shared.task_state import OrderState, TaskStatus


# ---- POST /api/orders ----


class SubmitOrderRequest(BaseModel):
    """上游提交下单意图

    task_id 可选：上游自带的幂等键。不传则服务端生成。同一个 task_id 重复提交
    不新建任务，返回既有任务且 created=false。
    """

    task_id: str | None = None
    site: str
    intent: dict[str, Any]


class SubmitOrderData(BaseModel):
    """提交响应"""

    task_id: str
    status: TaskStatus
    created: bool  # True=本次新建，False=命中既有任务（幂等）


# ---- GET /api/orders/lease ----


class LeaseData(BaseModel):
    """lease 响应

    无任务可领时整个 data 为 null（HTTP 仍 200）。lease_count > 1 表示这是恢复
    领取（stale → reclaim），worker 必须先核对站点订单列表，见 runner 主循环。
    """

    task_id: str
    site: str
    intent: dict[str, Any]
    lease_expires_at: str  # ISO8601 UTC
    lease_count: int
    known_state: OrderState | None  # 之前上报过的最新订单状态；首次领取为 null


# ---- POST /api/orders/{id}/renew ----


class RenewRequest(BaseModel):
    """续租请求"""

    worker_id: str


class RenewData(BaseModel):
    """续租响应"""

    task_id: str
    lease_expires_at: str
    lease_count: int


# ---- POST /api/orders/{id}/report ----


class ReportRequest(BaseModel):
    """本地回报订单状态

    同一 (task_id, state) 重复上报是幂等的——网络抖动导致 worker 重发时覆盖同一行，
    不产生第二条记录。terminal=true 时释放租约并把任务推到终态。
    """

    worker_id: str
    state: OrderState
    payable_yen: int | None = None
    pay_deadline: str | None = None  # ISO8601
    site_order_id: str | None = None
    evidence_ref: str | None = None  # 本地相对路径，不含扩展名
    detail: str = ""
    terminal: bool = False
    terminal_status: TaskStatus | None = None  # terminal=true 时指定终态，缺省按 state 推断


class ReportData(BaseModel):
    """回报响应"""

    task_id: str
    status: TaskStatus
    recorded: bool  # False=同 (task_id, state) 已存在，本次为幂等覆盖；True=新写入


# ---- POST /api/orders/{id}/reclaim ----


class ReclaimRequest(BaseModel):
    """把 stale 任务重新租给 worker"""

    worker_id: str


class ReclaimData(BaseModel):
    """reclaim 响应，结构与 LeaseData 一致，但 lease_count 必然 > 1"""

    task_id: str
    site: str
    intent: dict[str, Any]
    lease_expires_at: str
    lease_count: int
    known_state: OrderState | None


# ---- GET /api/orders/{id} 与 GET /api/orders ----


class ReportEntry(BaseModel):
    """task_reports 单行"""

    state: OrderState
    payable_yen: int | None = None
    pay_deadline: str | None = None
    site_order_id: str | None = None
    evidence_ref: str | None = None
    detail: str = ""
    reported_at: str


class TaskDetail(BaseModel):
    """单个任务详情"""

    task_id: str
    site: str
    intent: dict[str, Any]
    status: TaskStatus
    lease_owner: str | None = None
    lease_expires_at: str | None = None
    lease_count: int = 0
    created_at: str
    updated_at: str
    latest_state: OrderState | None = None
    reports: list[ReportEntry] = Field(default_factory=list)


class TaskListData(BaseModel):
    """任务列表"""

    items: list[TaskDetail]
    total: int
    limit: int
    offset: int


# ---- GET /health ----


class WorkerHealthEntry(BaseModel):
    """单个 worker 的健康指标"""

    worker_id: str
    last_seen_at: str
    last_seen_seconds: int


class QueuedAlertEntry(BaseModel):
    """长时间无人领的任务告警项"""

    task_id: str
    site: str
    created_at: str
    age_seconds: int


class GatewayHealthData(BaseModel):
    """网关健康状态

    只做规格 §4.7 的两条兜底告警：worker 失联、任务长时间无人领。付款期限监控
    不在网关——本地机 7×24 在线，那套逻辑放本地。
    """

    status: str  # "ok" 或 "degraded"
    queued_count: int
    active_tasks: list[TaskDetail] = Field(default_factory=list)
    workers: list[WorkerHealthEntry] = Field(default_factory=list)
    offline_workers: list[WorkerHealthEntry] = Field(default_factory=list)
    stale_queued_tasks: list[QueuedAlertEntry] = Field(default_factory=list)