"""比价记录上报 / 读取 schemas。

约定同 welfare:字段 snake_case、金额存整数(分)、时间 ISO 8601。

上报请求(ComparisonRecordIn)的字段刻意对齐 pricebot 协议
(docs/main/02_api_protocol.md 的 calibration + done.params.comparison_results),
让客户端把 Phase1 的 calibration 和 done 帧的 params 字段**零翻译**直接映射上来,
server 端负责拆成结构化列(best_*/saved/is_source_best 由 comparison_results 派生)。
"""
from __future__ import annotations

from datetime import datetime

from pydantic import BaseModel, ConfigDict, Field


# ===== 上报请求 =====

class ComparisonItemIn(BaseModel):
    """下单菜品(来自 calibration.items)。"""

    name: str
    qty: int = 1
    specs: list[str] | None = None


class ComparisonResultIn(BaseModel):
    """逐平台对比项(来自 done.params.comparison_results)。price 单位:元。"""

    platform_id: str | None = None
    platform_name: str | None = None
    package: str | None = None
    price: float | None = None
    is_source: bool = False
    rank: int | None = None
    # 该平台本单用红包省的**纯红包优惠额**(元, 不含配送费/代金券/满减)。None=没用/没抠到。
    # 必须显式声明: 落库走 model_dump(), pydantic 默认丢未知字段, 不声明这行会被悄悄吞掉。
    # 各平台抠到红包即带值(2026-06 起源平台 Phase1 意图识别也抠, 当前仅淘宝源)。见 pricebot 侧 比价红包额留痕-实现方案.md。
    coupon_saved: float | None = None
    # 优惠**来源名**(展示用, best-effort): 美团"外卖大额神券"/京东"百亿补贴"/淘宝"平台红包"。
    # None=没抠到 → 前端走通用"红包"。同样必须显式声明否则上报边界被 pydantic 静默丢弃(pricebot#38 引入)。
    coupon_name: str | None = None


class ComparisonRecordIn(BaseModel):
    # 幂等键:同一用户同一 trace_id 重复上报只保留一条(覆盖)
    trace_id: str = Field(..., min_length=1, description="pricebot 侧 trace_id")
    business_type: str = Field("food", description="food / ecom / coupon")
    device_id: str | None = None

    # 源平台(来自 calibration)
    store_name: str | None = Field(None, description="店铺名(外卖)")
    source_platform_id: str | None = None
    source_platform_name: str | None = None
    source_package: str | None = None
    source_price: float | None = Field(None, description="源平台到手价(元)")

    # 明细
    items: list[ComparisonItemIn] = Field(default_factory=list)
    comparison_results: list[ComparisonResultIn] = Field(default_factory=list)
    skipped_dish_count: int | None = None
    skipped_dish_names: list[str] = Field(default_factory=list)
    total_dish_count: int | None = None

    information: str | None = Field(None, description="done 帧文案,留存备查")
    # 不传则服务端按 comparison_results 派生(有非源有效价=success,否则 failed)
    status: str | None = Field(None, description="success / failed,可不传由服务端派生")
    # 最优平台商家/商品深链(客户端从 collectedLinks[best_index] 取);「再次比价」直达用
    best_deeplink: str | None = Field(None, description="最优平台深链,再次比价直达")


# ===== 读取出参 =====

class ComparisonRecordOut(BaseModel):
    """列表项:结构化概要字段(不含 raw_payload,减小列表 payload)。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    business_type: str
    trace_id: str
    source_platform_id: str | None = None
    source_platform_name: str | None = None
    source_package: str | None = None
    source_price_cents: int | None = None
    best_platform_id: str | None = None
    best_platform_name: str | None = None
    best_price_cents: int | None = None
    best_deeplink: str | None = None
    saved_amount_cents: int | None = None
    is_source_best: bool | None = None
    store_name: str | None = None
    total_dish_count: int | None = None
    skipped_dish_count: int | None = None
    status: str
    information: str | None = None
    items: list = []
    comparison_results: list = []
    skipped_dish_names: list = []
    # 「已下单」(店级):该店名在该用户真实下单(source='compare')里出现过即 True。
    # 由 list_records 动态算出挂在 ORM 实例上(非 DB 列),from_attributes 读出;缺省 False。
    ordered: bool = False
    created_at: datetime


class ComparisonRecordDetailOut(ComparisonRecordOut):
    """详情:在概要之上额外带 raw_payload 全量。"""

    raw_payload: dict | None = None


class ComparisonRecordPage(BaseModel):
    items: list[ComparisonRecordOut]
    next_cursor: int | None = Field(None, description="下一页游标(末条 id);为空表示到底")


class ComparisonRecordCreatedOut(BaseModel):
    id: int = Field(..., description="写入(或已存在)的记录 id")


# ===== 比价战绩里程碑(福利页「记录比价战绩」)=====

class MilestoneStateOut(BaseModel):
    milestone: int = Field(..., description="档位序号 1-based(= 解锁所需的成功比价次数)")
    coin: int = Field(..., description="该档应发金币额(产品规则值);当前领取暂不真发, 见 compare-milestone-claim 文档")
    state: str = Field(..., description="claimed(已领) / active(可领) / locked(未解锁)")


class MilestoneStatusOut(BaseModel):
    success_count: int = Field(..., description="累计成功比价次数(解锁进度)")
    claimable_count: int = Field(..., description="当前可领(active)档数")
    milestones: list[MilestoneStateOut]


class MilestoneClaimResultOut(BaseModel):
    milestone: int = Field(..., description="本次领取的档位序号")
    coin_awarded: int = Field(..., description="本次发放金币")
    coin_balance: int = Field(..., description="领奖后金币余额")