"""ODF 光纤配线单元管理系统 - Pydantic 请求/响应模型定义。

定义了 API 接口使用的数据验证和序列化模型。
"""

from datetime import datetime
from typing import Optional

from pydantic import BaseModel, Field

from app.models import PortType, PortStatus


# ========== 端口相关 ==========

class PortCreate(BaseModel):
    """创建端口请求模型。"""
    port_number: int = Field(..., ge=1, description="端口编号")
    port_type: PortType = PortType.LC
    label: str = ""


class PortResponse(BaseModel):
    """端口响应模型。"""
    port_id: str
    unit_id: str
    port_number: int
    port_type: PortType
    status: PortStatus
    label: str

    model_config = {"from_attributes": True}


# ========== 配线单元相关 ==========

class UnitCreate(BaseModel):
    """创建配线单元请求模型。"""
    unit_number: int = Field(..., ge=1, description="单元编号")
    unit_name: str = ""
    position: str = ""
    port_count: int = Field(12, ge=1, le=48, description="端口数量")
    port_type: PortType = PortType.LC


class UnitResponse(BaseModel):
    """配线单元响应模型。"""
    unit_id: str
    rack_id: str
    unit_number: int
    unit_name: str
    position: str
    ports: list[PortResponse]

    model_config = {"from_attributes": True}


# ========== 机架相关 ==========

class RackCreate(BaseModel):
    """创建机架请求模型。"""
    rack_name: str = Field(..., min_length=1, max_length=64, description="机架名称/编号")
    location: str = ""


class RackResponse(BaseModel):
    """机架响应模型。"""
    rack_id: str
    rack_name: str
    location: str
    units: list[UnitResponse]

    model_config = {"from_attributes": True}


class RackListResponse(BaseModel):
    """机架列表响应模型（不包含嵌套单元）。"""
    rack_id: str
    rack_name: str
    location: str
    unit_count: int = 0

    model_config = {"from_attributes": True}


# ========== 连接相关 ==========

class ConnectionCreate(BaseModel):
    """创建跳接连接请求模型。"""
    port_a_id: str = Field(..., description="起始端口 ID（A端）")
    port_b_id: str = Field(..., description="终止端口 ID（B端）")
    fiber_length: float = Field(0.0, ge=0, description="光纤长度（米）")
    remark: str = ""


class ConnectionResponse(BaseModel):
    """跳接连接响应模型。"""
    connection_id: str
    port_a_id: str
    port_b_id: str
    fiber_length: float
    create_time: str
    remark: str

    model_config = {"from_attributes": True}


class PortDetail(BaseModel):
    """端口详细信息（含所属单元和机架）。"""
    port_id: str
    port_number: int
    port_type: PortType
    status: PortStatus
    label: str
    unit_id: str
    unit_number: int
    rack_id: str
    rack_name: str


class FreePortResponse(BaseModel):
    """空闲端口列表响应元素。"""
    port_id: str
    port_number: int
    port_type: PortType
    label: str
    unit_id: str
    unit_number: int
    rack_id: str
    rack_name: str

    model_config = {"from_attributes": True}