package handler

import (
	"encoding/json"
	"net/http"
	"sort"
	"time"

	"bj_power_wms/internal/svc"
)

// 视为"已完成"的工单状态（查询时排到最后，未完成的优先显示）
var mesDoneStatuses = map[string]bool{
	"FINISHED": true, "COMPLETED": true, "DONE": true,
	"CLOSED": true, "已完结": true, "已完成": true,
}

type mesOrder struct {
	WorkOrderNo string `json:"workOrderNo"`
	ProductCode string `json:"productCode"`
	ProductName string `json:"productName"`
	Quantity    int    `json:"quantity"`
	Status      string `json:"status"`
}

// ordersHandler 调用 MES 内部接口获取工单列表，把未完成工单排前面，供备料出库下拉选择
func ordersHandler(ctx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		url := ctx.Config.Mes.BaseURL + "/api/internal/order/query?orderNo=" + r.URL.Query().Get("orderNo")
		req, err := http.NewRequest(http.MethodGet, url, nil)
		if err != nil {
			fail(w, http.StatusBadGateway, "构造 MES 请求失败")
			return
		}
		req.Header.Set("X-API-TOKEN", ctx.Config.Mes.Token)
		cli := &http.Client{Timeout: 5 * time.Second}
		resp, err := cli.Do(req)
		if err != nil {
			fail(w, http.StatusBadGateway, "无法连接 MES 服务")
			return
		}
		defer resp.Body.Close()
		if resp.StatusCode != http.StatusOK {
			fail(w, http.StatusBadGateway, "MES 返回异常")
			return
		}
		var body struct {
			Data []mesOrder `json:"data"`
		}
		if err := json.NewDecoder(resp.Body).Decode(&body); err != nil {
			fail(w, http.StatusBadGateway, "解析 MES 响应失败")
			return
		}
		list := body.Data
		if list == nil {
			list = []mesOrder{}
		}
		sort.SliceStable(list, func(i, j int) bool {
			di := mesDoneStatuses[list[i].Status]
			dj := mesDoneStatuses[list[j].Status]
			if di != dj {
				return !di // 未完成在前
			}
			return list[i].WorkOrderNo < list[j].WorkOrderNo
		})
		ok(w, list)
	}
}