package menu

import (
	"errors"
	"net/http"
	"strconv"
	"strings"
	"time"

	systemmodel "management/internal/erpserver/model/system"
	v1 "management/internal/erpserver/service/v1"
	"management/internal/erpserver/templ/system/menu"
	"management/internal/pkg/convertor"
	"management/internal/pkg/mid"
	"management/internal/pkg/render"
	"management/internal/pkg/sqldb"

	"github.com/google/uuid"
)

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

type app struct {
	render      render.Renderer
	menuService v1.MenuService
}

func newApp(render render.Renderer, menuService v1.MenuService) *app {
	return &app{
		render:      render,
		menuService: menuService,
	}
}

func (a *app) menus(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	user := mid.GetUser(ctx)
	menus, err := a.menuService.OwerMenus(ctx, user.RoleID)
	if err != nil {
		a.render.JSONErr(w, err.Error())
		return
	}

	a.render.JSON(w, menus)
}

func (a *app) list(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case http.MethodGet:
		ctx := r.Context()
		a.render.Render(ctx, w, menu.List(ctx))
	case http.MethodPost:
		res, err := a.menuService.ListMenuTree(r.Context())
		if err != nil {
			a.render.JSONErr(w, err.Error())
			return
		}
		a.render.JSON(w, render.NewResponseList(0, res))
	default:
		a.render.JSONErr(w, "method not allowed")
	}
}

func (a *app) add(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	a.render.Render(ctx, w, menu.Edit(ctx, &systemmodel.Menu{Style: style, Visible: true, Sort: 6666}))
}

func (a *app) addChildren(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	vars := r.URL.Query()
	parentID := convertor.QueryInt[int32](vars, "parentID", 0)
	vm := &systemmodel.Menu{ParentID: parentID, Style: style, Visible: true, Sort: 6666}
	parent, err := a.menuService.Get(ctx, parentID)
	if err == nil {
		if parent.Type == "node" {
			vm.Type = "menu"
		} else if parent.Type == "menu" {
			vm.Type = "btn"
		}
	}
	a.render.Render(ctx, w, menu.Edit(ctx, vm))
}

func (a *app) edit(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	vars := r.URL.Query()
	id := convertor.QueryInt[int32](vars, "id", 0)
	vm := &systemmodel.Menu{Style: style, Sort: 6666}
	if id > 0 {
		vm, _ = a.menuService.Get(r.Context(), id)
	}
	a.render.Render(ctx, w, menu.Edit(ctx, vm))
}

func (a *app) save(w http.ResponseWriter, r *http.Request) {
	id := convertor.Int[int32](r.PostFormValue("ID"), 0)
	name := r.PostFormValue("Name")
	displayName := 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.Int[int32](r.PostFormValue("ParentID"), 0)
	visible := convertor.Bool(r.PostFormValue("Visible"), false)
	isList := convertor.Bool(r.PostFormValue("IsList"), false)
	sort := convertor.Int[int32](r.PostFormValue("Sort"), 6666)
	status := convertor.Int[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 := a.menuService.Get(ctx, parentID)
		if err != nil {
			a.render.JSONErr(w, err.Error())
			return
		}
		parentPath = parent.ParentPath + "," + strconv.Itoa(int(parentID)) + ","
		parentPath = strings.ReplaceAll(parentPath, ",,", ",")
	}

	if id == 0 {
		arg := &systemmodel.Menu{
			Name:        name,
			DisplayName: displayName,
			Url:         url,
			Type:        t,
			ParentID:    parentID,
			ParentPath:  parentPath,
			Avatar:      avatar,
			Style:       style,
			Visible:     visible,
			IsList:      isList,
			Status:      status,
			Sort:        sort,
			CreatedAt:   time.Now(),
			UpdatedAt:   time.Now(),
		}
		err := a.menuService.Create(ctx, arg)
		if err != nil {
			if errors.Is(err, sqldb.ErrDBDuplicatedEntry) {
				a.render.JSONErr(w, "菜单已存在")
				return
			}
			a.render.JSONErr(w, err.Error())
			return
		}

		a.render.JSONOk(w, "添加成功")
	} else {
		res, err := a.menuService.Get(ctx, id)
		if err != nil {
			a.render.JSONErr(w, err.Error())
			return
		}

		res.Name = name
		res.DisplayName = displayName
		res.Url = url
		res.Type = t
		res.ParentID = parentID
		res.ParentPath = parentPath
		res.Avatar = avatar
		res.Style = style
		res.Visible = visible
		res.IsList = isList
		res.Status = status
		res.Sort = sort
		res.UpdatedAt = time.Now()
		err = a.menuService.Update(ctx, res)
		if err != nil {
			a.render.JSONErr(w, err.Error())
			return
		}

		a.render.JSONOk(w, "更新成功")
	}
}

func (a *app) data(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	vars := r.URL.Query()
	t := vars.Get("type")
	if t == "tree" {
		res, err := a.menuService.Tree(ctx, 0)
		if err != nil {
			a.render.JSONErr(w, err.Error())
			return
		}

		a.render.JSON(w, res)
		return
	} else if t == "xm_select_tree" {
		res, err := a.menuService.XmSelectTree(ctx, 0)
		if err != nil {
			a.render.JSONErr(w, err.Error())
			return
		}

		a.render.JSON(w, res)
		return
	}
	a.render.JSON(w, nil)
}

func (a *app) refreshCache(w http.ResponseWriter, r *http.Request) {
	err := a.menuService.RefreshCache(r.Context())
	if err != nil {
		a.render.JSONErr(w, err.Error())
		return
	}

	a.render.JSONOk(w, "缓存刷新成功")
}