"""
合同域 Pydantic V2 Schemas
"""

from __future__ import annotations

import uuid
from datetime import date, datetime
from typing import Any

from pydantic import BaseModel, Field


# ── 合同明细行 ────────────────────────────────────────────
class ContractItemCreate(BaseModel):
    sku_id: uuid.UUID
    qty: float = Field(gt=0)
    unit_price: float = Field(ge=0)
    sub_total: float = Field(ge=0)


class ContractItemResponse(BaseModel):
    id: uuid.UUID
    sku_id: uuid.UUID
    sku_code: str | None = None
    sku_name: str | None = None
    spec: str | None = None
    unit: str | None = None
    qty: float
    unit_price: float
    sub_total: float

    model_config = {"from_attributes": True}


# ── 合同创建 ──────────────────────────────────────────────
class ContractCreate(BaseModel):
    buyer_customer_id: uuid.UUID
    items: list[ContractItemCreate] = Field(min_length=1)
    payment_terms: str = "货到付全款"
    shipping_terms: str = "买方自提"
    remark: str | None = None
    delivery_terms: str | None = None
    sign_date: date | None = None


# ── 合同更新 ──────────────────────────────────────────────
class ContractUpdate(BaseModel):
    buyer_customer_id: uuid.UUID | None = None
    items: list[ContractItemCreate] | None = None
    payment_terms: str | None = None
    shipping_terms: str | None = None
    status: str | None = None
    is_signed: bool | None = None
    remark: str | None = None
    delivery_terms: str | None = None
    sign_date: date | None = None


# ── 执行进度 ──────────────────────────────────────────────
class ContractProgressResponse(BaseModel):
    is_signed: bool = False
    has_order: bool = False
    order_id: uuid.UUID | None = None
    has_shipped: bool = False
    has_invoice: bool = False
    is_paid: bool = False


# ── 合同响应 ──────────────────────────────────────────────
class ContractResponse(BaseModel):
    id: uuid.UUID
    contract_no: str
    buyer_customer_id: uuid.UUID
    buyer_customer_name: str | None = None
    seller_company_id: uuid.UUID
    seller_company_name: str | None = None
    company_id: uuid.UUID
    total_amount_excl_tax: float = 0
    total_amount_incl_tax: float = 0
    total_amount_cn: str | None = None
    payment_terms: str
    shipping_terms: str
    status: str
    is_signed: bool = False
    signed_file_url: str | None = None
    linked_order_id: uuid.UUID | None = None
    salesperson_id: uuid.UUID | None = None
    salesperson_name: str | None = None
    sign_date: date | None = None
    remark: str | None = None
    delivery_terms: str | None = None
    items: list[ContractItemResponse] = []
    progress: ContractProgressResponse | None = None
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


# ── 分页列表 ──────────────────────────────────────────────
class ContractListResponse(BaseModel):
    total: int
    items: list[ContractResponse]
    page: int
    size: int