package category

import (
	"fmt"
	"net/http"
	"strconv"
	"strings"

	"management/internal/db/model/dto"
	db "management/internal/db/sqlc"
	"management/internal/pkg/convertor"
	"management/internal/router/manage/util"
	categoryservice "management/internal/service/category"
	"management/internal/tpl"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
)

type CategoryHandler struct{}

func NewCategoryHandler() *CategoryHandler {
	return &CategoryHandler{}
}

func (h *CategoryHandler) List(w http.ResponseWriter, r *http.Request) {
	tpl.HTML(w, r, "category/list.tmpl", nil)
}

func (h *CategoryHandler) PostList(w http.ResponseWriter, r *http.Request) {
	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 := categoryservice.ListCategoriesCondition(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,
	}
	tpl.JSON(w, data)
}

func (h *CategoryHandler) Add(w http.ResponseWriter, r *http.Request) {
	tpl.HTML(w, r, "category/edit.tmpl", map[string]any{
		"Item": &db.Category{Sort: 6666},
	})
}

func (h *CategoryHandler) AddChildren(w http.ResponseWriter, r *http.Request) {
	vars := r.URL.Query()
	parentID := util.DefaultInt(vars, "parentID", 0)
	vm := &db.Category{ParentID: int32(parentID), Sort: 6666}
	tpl.HTML(w, r, "category/edit.tmpl", map[string]any{
		"Item": vm,
	})
}

func (h *CategoryHandler) Edit(w http.ResponseWriter, r *http.Request) {
	vars := r.URL.Query()
	id := util.DefaultInt(vars, "id", 0)
	vm := &db.Category{Sort: 6666}
	if id > 0 {
		ctx := r.Context()
		vm, _ = db.Engine.GetCategory(ctx, int32(id))
	}
	tpl.HTML(w, r, "category/edit.tmpl", map[string]any{
		"Item": vm,
	})
}

func (h *CategoryHandler) Save(w http.ResponseWriter, r *http.Request) {
	id := util.ConvertInt(r.PostFormValue("ID"), 0)
	parentID := util.ConvertInt(r.PostFormValue("ParentID"), 0)
	name := r.PostFormValue("Name")
	icon := r.PostFormValue("File")
	if len(icon) > 0 && !strings.HasPrefix(icon, "/") {
		icon = "/" + icon
	}
	description := r.PostFormValue("Description")
	letter := r.PostFormValue("Letter")
	if len(letter) == 0 {
		letter = uuid.New().String()
	}
	sort := util.ConvertInt(r.PostFormValue("Sort"), 6666)
	status := util.ConvertInt(r.PostFormValue("Status"), 9999)

	ctx := r.Context()
	var parent *db.Category
	if parentID > 0 {
		var err error
		parent, err = db.Engine.GetCategory(ctx, int32(parentID))
		if err != nil {
			tpl.JSON(w, tpl.Response{Success: false, Message: "父级节点错误"})
			return
		}
	}

	path := fmt.Sprintf("%s,%d,", parent.ParentPath, parent.ID)
	path = strings.ReplaceAll(path, ",,", ",")
	if id == 0 {
		arg := &db.CreateCategoryParams{
			Name:        name,
			Icon:        icon,
			Description: description,
			Letter:      letter,
			ParentID:    int32(parentID),
			ParentPath:  path,
			Status:      int16(status),
			Sort:        int32(sort),
		}
		_, err := db.Engine.CreateCategory(ctx, arg)
		if err != nil {
			if db.IsUniqueViolation(err) {
				tpl.JSON(w, tpl.Response{Success: false, Message: "名称已存在"})
				return
			}
			tpl.JSON(w, tpl.Response{Success: false, Message: err.Error()})
			return
		}

		tpl.JSON(w, tpl.Response{Success: true, Message: "添加成功"})
	} else {
		arg := &db.UpdateCategoryParams{
			ID: int32(id),
			Name: pgtype.Text{
				String: name,
				Valid:  true,
			},
			Icon: pgtype.Text{
				String: icon,
				Valid:  len(icon) > 0,
			},
			Description: pgtype.Text{
				String: description,
				Valid:  len(description) > 0,
			},
			Letter: pgtype.Text{
				String: letter,
				Valid:  len(letter) > 0,
			},
			ParentID: pgtype.Int4{
				Int32: int32(parentID),
				Valid: true,
			},
			ParentPath: pgtype.Text{
				String: path,
				Valid:  true,
			},
			Sort: pgtype.Int4{
				Int32: int32(sort),
				Valid: true,
			},
			Status: pgtype.Int2{
				Int16: int16(status),
				Valid: true,
			},
		}
		_, err := db.Engine.UpdateCategory(ctx, arg)
		if err != nil {
			tpl.JSON(w, tpl.Response{Success: false, Message: err.Error()})
			return
		}

		tpl.JSON(w, tpl.Response{Success: true, Message: "更新成功"})
	}
}

func (h *CategoryHandler) DTree(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	vars := r.URL.Query()
	id := util.DefaultInt(vars, "id", 0)
	res, err := categoryservice.DTreeCategory(ctx, int32(id))
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	rsp := tpl.ResponseDtree{
		Status: tpl.ResponseDtreeStatus{
			Code:    200,
			Message: "OK",
		},
		Data: res,
	}
	tpl.JSON(w, rsp)
}

func (h *CategoryHandler) XmSelect(w http.ResponseWriter, r *http.Request) {
	letter := r.URL.Query().Get("letter")
	ctx := r.Context()
	if len(letter) > 0 {
		all, err := categoryservice.ListByLetter(ctx, letter)
		if err != nil {
			tpl.JSONERR(w, err.Error())
			return
		}

		var res []*dto.XmSelectStrDto
		for _, v := range all {
			res = append(res, &dto.XmSelectStrDto{
				Name:  v.Name,
				Value: strconv.FormatInt(int64(v.ID), 10),
			})
		}
		tpl.JSON(w, res)
		return
	}

	res, err := categoryservice.XmSelectCategory(ctx, 0)
	if err != nil {
		tpl.JSONERR(w, err.Error())
		return
	}

	tpl.JSON(w, res)
}

func (h *CategoryHandler) Refresh(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	err := categoryservice.RefreshCategory(ctx)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	tpl.JSON(w, tpl.Response{Success: true, Message: "刷新成功"})
}

func (h *CategoryHandler) RebuildParentPath(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	err := db.Engine.CategoryRebuildPath(ctx)
	if err != nil {
		tpl.JSON(w, tpl.Response{Success: false, Message: err.Error()})
		return
	}

	tpl.JSON(w, tpl.Response{Success: true, Message: "重建成功"})
}