package system

import (
	"fmt"
	"net/http"
	"time"

	"management/internal/db/model/dto"
	db "management/internal/db/sqlc"
	"management/internal/erpserver/biz"
	"management/internal/pkg/convertor"
	"management/internal/pkg/tpl"
)

type DepartmentHandler interface {
	List(w http.ResponseWriter, r *http.Request)
	Add(w http.ResponseWriter, r *http.Request)
	AddChildren(w http.ResponseWriter, r *http.Request)
	Edit(w http.ResponseWriter, r *http.Request)
	Save(w http.ResponseWriter, r *http.Request)
	Tree(w http.ResponseWriter, r *http.Request)
	Refresh(w http.ResponseWriter, r *http.Request)
	RebuildParentPath(w http.ResponseWriter, r *http.Request)
}

type departmentHandler struct {
	render tpl.Renderer
	biz    biz.IBiz
}

var _ DepartmentHandler = (*departmentHandler)(nil)

func NewDepartmentHandler(render tpl.Renderer, biz biz.IBiz) *departmentHandler {
	return &departmentHandler{
		render: render,
		biz:    biz,
	}
}

func (h *departmentHandler) List(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case http.MethodGet:
		h.render.HTML(w, r, "department/list.tmpl", nil)
	case http.MethodPost:
		var q dto.SearchDto
		q.SearchStatus = convertor.ConvertInt(r.PostFormValue("status"), 9999)
		q.SearchParentID = convertor.ConvertInt(r.PostFormValue("parentId"), 0)
		q.SearchName = r.PostFormValue("name")
		q.SearchID = convertor.ConvertInt[int64](r.PostFormValue("id"), 0)
		q.Page = convertor.ConvertInt(r.PostFormValue("page"), 1)
		q.Rows = convertor.ConvertInt(r.PostFormValue("rows"), 10)
		res, count, err := h.biz.SystemV1().DepartmentBiz().List(r.Context(), q)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		data := tpl.ResponseList{
			Code:    0,
			Message: "ok",
			Count:   count,
			Data:    res,
		}
		h.render.JSON(w, data)
	default:
		http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
	}
}

func (h *departmentHandler) Add(w http.ResponseWriter, r *http.Request) {
	h.render.HTML(w, r, "department/edit.tmpl", map[string]any{
		"Item": &db.SysDepartment{Sort: 6666},
	})
}

func (h *departmentHandler) AddChildren(w http.ResponseWriter, r *http.Request) {
	vars := r.URL.Query()
	parentID := convertor.QueryInt(vars, "parentID", 0)
	vm := &db.SysDepartment{ParentID: int32(parentID), Sort: 6666}
	h.render.HTML(w, r, "department/edit.tmpl", map[string]any{
		"Item": vm,
	})
}

func (h *departmentHandler) Edit(w http.ResponseWriter, r *http.Request) {
	vars := r.URL.Query()
	id := convertor.QueryInt[int32](vars, "id", 0)
	vm := &db.SysDepartment{Sort: 6666}
	if id > 0 {
		vm, _ = h.biz.SystemV1().DepartmentBiz().Get(r.Context(), id)
	}
	h.render.HTML(w, r, "department/edit.tmpl", map[string]any{
		"Item": vm,
	})
}

func (h *departmentHandler) Save(w http.ResponseWriter, r *http.Request) {
	id := convertor.ConvertInt[int32](r.PostFormValue("ID"), 0)
	ParentID := convertor.ConvertInt[int32](r.PostFormValue("ParentID"), 0)
	name := r.PostFormValue("Name")
	sort := convertor.ConvertInt[int32](r.PostFormValue("Sort"), 6666)
	status := convertor.ConvertInt[int32](r.PostFormValue("Status"), 9999)

	ctx := r.Context()
	var parent *db.SysDepartment
	if ParentID > 0 {
		var err error
		parent, err = h.biz.SystemV1().DepartmentBiz().Get(ctx, ParentID)
		if err != nil {
			h.render.JSONERR(w, "父级节点错误")
			return
		}
	}

	if id == 0 {
		arg := db.CreateSysDepartmentParams{
			Name:       name,
			ParentID:   ParentID,
			ParentPath: fmt.Sprintf("%s,%d,", parent.ParentPath, parent.ID),
			Status:     status,
			Sort:       sort,
			CreatedAt:  time.Now(),
			UpdatedAt:  time.Now(),
		}
		_, err := h.biz.SystemV1().DepartmentBiz().Create(ctx, &arg)
		if err != nil {
			if db.IsUniqueViolation(err) {
				h.render.JSONERR(w, "部门名称已存在")
				return
			}
			h.render.JSONERR(w, err.Error())
			return
		}

		h.render.JSONOK(w, "添加成功")
	} else {
		res, err := h.biz.SystemV1().DepartmentBiz().Get(ctx, id)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

		arg := &db.UpdateSysDepartmentParams{
			ID:         res.ID,
			Name:       name,
			ParentID:   ParentID,
			ParentPath: fmt.Sprintf("%s,%d,", parent.ParentPath, parent.ID),
			Status:     status,
			Sort:       sort,
			UpdatedAt:  time.Now(),
		}
		_, err = h.biz.SystemV1().DepartmentBiz().Update(ctx, arg)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

		h.render.JSONOK(w, "更新成功")
	}
}

func (h *departmentHandler) Tree(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	vars := r.URL.Query()
	if vars.Get("type") == "xmselect" {
		res, err := h.biz.SystemV1().DepartmentBiz().XmSelect(ctx, 0)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

		h.render.JSON(w, res)
		return
	} else {
		res, err := h.biz.SystemV1().DepartmentBiz().Tree(ctx, 0)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

		h.render.JSON(w, res)
		return
	}
}

func (h *departmentHandler) Refresh(w http.ResponseWriter, r *http.Request) {
	_, err := h.biz.SystemV1().DepartmentBiz().Refresh(r.Context())
	if err != nil {
		h.render.JSONERR(w, err.Error())
		return
	}

	h.render.JSONOK(w, "刷新成功")
}

func (h *departmentHandler) RebuildParentPath(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	err := h.biz.SystemV1().DepartmentBiz().RebuildParentPath(ctx)
	if err != nil {
		h.render.JSONERR(w, err.Error())
		return
	}

	h.render.JSONOK(w, "重建成功")
}