package system

import (
	"encoding/json"
	"net/http"
	"strconv"
	"strings"
	"time"

	"management/internal/db/model/dto"
	db "management/internal/db/sqlc"
	"management/internal/erpserver/biz"
	"management/internal/global/know"
	"management/internal/pkg/convertor"
	"management/internal/pkg/session"
	"management/internal/pkg/tpl"

	"github.com/google/uuid"
)

const style = "layui-btn-primary layui-btn-sm"

type MenuHandler interface {
	MenuExpansion
}

type MenuExpansion interface {
	Menus(w http.ResponseWriter, r *http.Request)

	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)
	Data(w http.ResponseWriter, r *http.Request)
	Refresh(w http.ResponseWriter, r *http.Request)
}

type menuHandler struct {
	render  tpl.Renderer
	session session.ISession
	biz     biz.IBiz
}

var _ MenuHandler = (*menuHandler)(nil)

func NewMenuHandler(render tpl.Renderer, session session.ISession, biz biz.IBiz) *menuHandler {
	return &menuHandler{
		render:  render,
		session: session,
		biz:     biz,
	}
}

func (h *menuHandler) Menus(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	b := h.session.GetBytes(ctx, know.StoreName)
	var u dto.AuthorizeUser
	if err := json.Unmarshal(b, &u); err != nil {
		h.render.JSONERR(w, err.Error())
		return
	}
	menus, err := h.biz.SystemV1().MenuBiz().RecursiveSysMenus(ctx, u.RoleID)
	if err != nil {
		h.render.JSONERR(w, err.Error())
		return
	}

	h.render.JSON(w, menus)
}

func (h *menuHandler) List(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case http.MethodGet:
		h.render.HTML(w, r, "menu/list.tmpl", nil)
	case http.MethodPost:
		res, err := h.biz.SystemV1().MenuBiz().ListMenuTree(r.Context())
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

		data := tpl.ResponseList{
			Code:    0,
			Message: "ok",
			Count:   0,
			Data:    res,
		}
		h.render.JSON(w, data)
	default:
		h.render.JSONERR(w, "method not allowed")
	}
}

func (h *menuHandler) Add(w http.ResponseWriter, r *http.Request) {
	h.render.HTML(w, r, "menu/edit.tmpl", map[string]any{
		"Item": &db.SysMenu{Style: style, Visible: true, Sort: 6666},
	})
}

func (h *menuHandler) AddChildren(w http.ResponseWriter, r *http.Request) {
	vars := r.URL.Query()
	parentID := convertor.QueryInt[int32](vars, "parentID", 0)
	vm := &db.SysMenu{ParentID: int32(parentID), Style: style, Visible: true, Sort: 6666}
	parent, err := h.biz.SystemV1().MenuBiz().Get(r.Context(), parentID)
	if err == nil {
		if parent.Type == "node" {
			vm.Type = "menu"
		} else if parent.Type == "menu" {
			vm.Type = "btn"
		}
	}
	h.render.HTML(w, r, "menu/edit.tmpl", map[string]any{
		"Item": vm,
	})
}

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

func (h *menuHandler) Save(w http.ResponseWriter, r *http.Request) {
	id := convertor.ConvertInt[int32](r.PostFormValue("ID"), 0)
	name := r.PostFormValue("Name")
	dispalyName := r.PostFormValue("DisplayName")
	t := r.PostFormValue("Type")
	url := r.PostFormValue("Url")
	if len(url) == 0 {
		url = uuid.Must(uuid.NewRandom()).String()
	}
	avatar := r.PostFormValue("Avatar")
	style := r.PostFormValue("Style")
	parentID := convertor.ConvertInt[int32](r.PostFormValue("ParentID"), 0)
	visible := convertor.ConvertBool(r.PostFormValue("Visible"), false)
	isList := convertor.ConvertBool(r.PostFormValue("IsList"), false)
	sort := convertor.ConvertInt[int32](r.PostFormValue("Sort"), 6666)
	status := convertor.ConvertInt[int32](r.PostFormValue("Status"), 0)

	ctx := r.Context()
	if len(avatar) > 0 && !strings.Contains(avatar, "layui-icon ") {
		avatar = "layui-icon " + avatar
	}

	parentPath := ""
	if parentID > 0 {
		parent, err := h.biz.SystemV1().MenuBiz().Get(ctx, parentID)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}
		parentPath = parent.ParentPath + "," + strconv.Itoa(int(parentID)) + ","
		parentPath = strings.ReplaceAll(parentPath, ",,", ",")
	}

	if id == 0 {
		arg := &db.CreateSysMenuParams{
			Name:        name,
			DisplayName: dispalyName,
			Url:         url,
			Type:        t,
			ParentID:    int32(parentID),
			ParentPath:  parentPath,
			Avatar:      avatar,
			Style:       style,
			Visible:     visible,
			IsList:      isList,
			Status:      status,
			Sort:        sort,
			CreatedAt:   time.Now(),
			UpdatedAt:   time.Now(),
		}
		_, err := h.biz.SystemV1().MenuBiz().Create(ctx, arg)
		if err != nil {
			if db.IsUniqueViolation(err) {
				h.render.JSONERR(w, "菜单已存在")
				return
			}
			h.render.JSONERR(w, err.Error())
			return
		}

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

		arg := &db.UpdateSysMenuParams{
			ID:          res.ID,
			Name:        name,
			DisplayName: dispalyName,
			Url:         url,
			Type:        t,
			ParentID:    parentID,
			ParentPath:  parentPath,
			Avatar:      avatar,
			Style:       style,
			Visible:     visible,
			IsList:      isList,
			Status:      status,
			Sort:        sort,
			UpdatedAt:   time.Now(),
		}
		_, err = h.biz.SystemV1().MenuBiz().Update(ctx, arg)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

		h.render.JSONOK(w, "更新成功")
	}
}

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

		h.render.JSON(w, res)
		return
	} else if t == "xmselect_tree" {
		res, err := h.biz.SystemV1().MenuBiz().XmSelectTree(ctx, 0)
		if err != nil {
			h.render.JSONERR(w, err.Error())
			return
		}

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

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

	h.render.JSONOK(w, "刷新成功")
}