package handler

import (
	"net/http"
	"time"

	"bj_power_wms/ent"
	"bj_power_wms/ent/material"
	"bj_power_wms/internal/svc"

	"github.com/zeromicro/go-zero/core/logx"
)

// createMaterialHandler 创建物料档案
func createMaterialHandler(ctx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var req struct {
			Code         string `json:"code"`
			Name         string `json:"name"`
			ShortName    string `json:"shortName"`
			Spec         string `json:"spec"`
			Unit         string `json:"unit"`
			Description  string `json:"description"`
			ManageMode   int    `json:"manageMode"` // 1批次/2序列号
			TemplateCode string `json:"templateCode"`
		}
		if err := parseJSON(r, &req); err != nil {
			fail(w, http.StatusBadRequest, "参数错误")
			return
		}
		if req.Code == "" || req.Name == "" {
			fail(w, http.StatusBadRequest, "code 和 name 必填")
			return
		}

		// 校验编码唯一
		exists, err := ctx.EntClient.Material.Query().
			Where(material.CodeEQ(req.Code)).
			Exist(ctx0())
		if err != nil {
			fail(w, http.StatusInternalServerError, err.Error())
			return
		}
		if exists {
			fail(w, http.StatusConflict, "物料编码已存在: "+req.Code)
			return
		}

		manageMode := req.ManageMode
		if manageMode == 0 {
			manageMode = 1
		}

		m, err := ctx.EntClient.Material.Create().
			SetCode(req.Code).
			SetName(req.Name).
			SetNillableShortName(strPtr(req.ShortName)).
			SetNillableSpec(strPtr(req.Spec)).
			SetNillableUnit(strPtr(req.Unit)).
			SetNillableDescription(strPtr(req.Description)).
			SetManageMode(manageMode).
			SetIsBatchManaged(manageMode == 1).
			SetIsSerialManaged(manageMode == 2).
			SetNillableTemplateCode(strPtr(req.TemplateCode)).
			Save(ctx0())
		if err != nil {
			logx.Errorf("create material failed: %v", err)
			fail(w, http.StatusInternalServerError, "创建物料失败: "+err.Error())
			return
		}

		ok(w, m)
	}
}

// updateMaterialHandler 更新物料档案
func updateMaterialHandler(ctx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var req struct {
			ID          int    `json:"id"`
			Name        string `json:"name"`
			ShortName   string `json:"shortName"`
			Spec        string `json:"spec"`
			Unit        string `json:"unit"`
			Description string `json:"description"`
			ManageMode  int    `json:"manageMode"`
		}
		if err := parseJSON(r, &req); err != nil || req.ID <= 0 {
			fail(w, http.StatusBadRequest, "参数错误")
			return
		}

		upd := ctx.EntClient.Material.UpdateOneID(req.ID)
		if req.Name != "" {
			upd.SetName(req.Name)
		}
		upd.SetShortName(req.ShortName)
		upd.SetSpec(req.Spec)
		upd.SetUnit(req.Unit)
		upd.SetDescription(req.Description)
		if req.ManageMode > 0 {
			upd.SetManageMode(req.ManageMode).
				SetIsBatchManaged(req.ManageMode == 1).
				SetIsSerialManaged(req.ManageMode == 2)
		}

		m, err := upd.Save(ctx0())
		if err != nil {
			fail(w, http.StatusInternalServerError, "更新物料失败: "+err.Error())
			return
		}
		ok(w, m)
	}
}

// queryMaterialsHandler 分页查询物料
func queryMaterialsHandler(ctx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		page := atoi(r.URL.Query().Get("page"), 1)
		pageSize := atoi(r.URL.Query().Get("pageSize"), 20)
		materialCode := r.URL.Query().Get("materialCode")
		name := r.URL.Query().Get("name")
		spec := r.URL.Query().Get("spec")
		manageMode := atoi(r.URL.Query().Get("manageMode"), 0)
		startDate := r.URL.Query().Get("startDate")
		endDate := r.URL.Query().Get("endDate")
		keyword := r.URL.Query().Get("keyword") // 兼容旧版，作为物料编码/名称兜底

		q := ctx.EntClient.Material.Query()
		if materialCode != "" {
			q = q.Where(material.CodeContains(materialCode))
		}
		if name != "" {
			q = q.Where(material.NameContains(name))
		}
		if spec != "" {
			q = q.Where(material.SpecContains(spec))
		}
		if manageMode != 0 {
			q = q.Where(material.ManageModeEQ(manageMode))
		}
		if keyword != "" {
			q = q.Where(
				material.Or(
					material.CodeContains(keyword),
					material.NameContains(keyword),
				),
			)
		}
		if startDate != "" {
			if t, err := time.ParseInLocation("2006-01-02", startDate, time.Local); err == nil {
				q = q.Where(material.CreatedAtGTE(t.Unix()))
			}
		}
		if endDate != "" {
			if t, err := time.ParseInLocation("2006-01-02", endDate, time.Local); err == nil {
				q = q.Where(material.CreatedAtLTE(t.Add(24 * time.Hour).Unix()))
			}
		}

		total, err := q.Count(ctx0())
		if err != nil {
			fail(w, http.StatusInternalServerError, err.Error())
			return
		}

		list, err := q.Order(ent.Desc("created_at")).
			Offset((page - 1) * pageSize).
			Limit(pageSize).
			All(ctx0())
		if err != nil {
			fail(w, http.StatusInternalServerError, err.Error())
			return
		}

		ok(w, map[string]any{
			"total":    total,
			"list":     list,
			"page":     page,
			"pageSize": pageSize,
		})
	}
}

// listMaterialsHandler 下拉框全量列表（不翻页）
func listMaterialsHandler(ctx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		list, err := ctx.EntClient.Material.Query().Order(ent.Desc("created_at")).All(ctx0())
		if err != nil {
			fail(w, http.StatusInternalServerError, err.Error())
			return
		}
		ok(w, list)
	}
}

// getMaterialHandler 物料详情
func getMaterialHandler(ctx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		id := atoi(r.URL.Query().Get("id"), 0)
		if id <= 0 {
			fail(w, http.StatusBadRequest, "id 必填")
			return
		}
		m, err := ctx.EntClient.Material.Get(ctx0(), id)
		if err != nil {
			fail(w, http.StatusNotFound, "物料不存在")
			return
		}
		ok(w, m)
	}
}