"""标签打印 API — 预览 / 执行 / 打印机配置"""
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel, Field

from app.services.label_service import generate_preview_image, send_to_printer
from app.services.print_config import PrintConfigManager
from app.services.auth_service import get_current_user

router = APIRouter(prefix="/print", tags=["标签打印"])


# ============================================================
# 请求体
# ============================================================

class LabelPreviewRequest(BaseModel):
    serial_number: str = Field(..., min_length=1, description="16位HEX系统ID（二维码内容）")
    material_name: str = Field("", description="物料名称")
    spec_model: str = Field("", description="规格型号")
    order_no: str = Field("", description="订单号（条件渲染）")


class PrintExecuteRequest(LabelPreviewRequest):
    copies: int = Field(1, ge=1, le=100, description="打印份数")
    printer_ip: str | None = Field(None, description="覆盖配置的打印机 IP")
    printer_port: int | None = Field(None, description="覆盖配置的打印机端口")


class PrinterConfigUpdate(BaseModel):
    ip: str = Field(..., description="打印机 IP 地址")
    port: int = Field(9100, ge=1, le=65535, description="打印机端口")
    enabled: bool = Field(True, description="是否启用")


# ============================================================
# 端点
# ============================================================

@router.post("/preview")
def print_preview(data: LabelPreviewRequest) -> dict:
    """生成标签预览图（Base64 JPEG）"""
    try:
        data_url = generate_preview_image(**data.model_dump())
        return {"data_url": data_url}
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"生成预览失败: {str(e)}",
        )


@router.post("/execute")
def print_execute(
    data: PrintExecuteRequest,
    current_user: dict = Depends(get_current_user),
) -> dict:
    """发送打印指令到物理打标机"""
    payload = data.model_dump()
    copies = payload.pop("copies", 1)
    printer_ip = payload.pop("printer_ip", None)
    printer_port = payload.pop("printer_port", None)

    result = send_to_printer(
        copies=copies,
        printer_ip=printer_ip,
        printer_port=printer_port,
        **payload,
    )
    if not result["success"]:
        raise HTTPException(
            status_code=status.HTTP_502_BAD_GATEWAY,
            detail=result["message"],
        )
    return result


@router.get("/config")
def get_printer_config() -> dict:
    """获取打印机当前配置"""
    return PrintConfigManager.get_config()


@router.post("/config")
def update_printer_config(
    data: PrinterConfigUpdate,
    current_user: dict = Depends(get_current_user),
) -> dict:
    """更新打印机配置（IP/端口）"""
    current = PrintConfigManager.get_config()
    current["label_printer"] = {
        "ip": data.ip,
        "port": data.port,
        "enabled": data.enabled,
    }
    PrintConfigManager.save_config(current)
    return {
        "message": "打印机配置已更新",
        "config": current["label_printer"],
    }