package data

import (
	"errors"
	"strconv"

	"github.com/gin-gonic/gin"
)

// 状态枚举
type Status int32

const (
	StatusNone       Status = 0
	StatusOk         Status = 1
	StatusProcessing Status = 2
	StatusDeleted    Status = 3
	StatusFailed     Status = 4
)

var (
	ErrorNotExists = errors.New("not exists")
)

func PageCalc(page, size int) (offset, limit int) {
	if page <= 0 {
		page = 1
	}
	switch {
	case size > 1000:
		size = 1000
	case size <= 0:
		size = 20
	}
	offset = (page - 1) * size
	return offset, size
}

type Page struct {
	Page, PageSize int
	SortBy         string
	Asc            bool
	Offset, Limit  int
}

func PageArgs(ctx *gin.Context) Page {
	page, _ := strconv.Atoi(ctx.Query("page"))
	pageSize, _ := strconv.Atoi(ctx.Query("pageSize"))
	sortBy := ctx.Query("sortBy")
	asc, _ := strconv.Atoi(ctx.Query("asc"))

	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 || pageSize > 1000 {
		pageSize = 20
	}
	offset, limit := PageCalc(page, pageSize)
	return Page{
		Page:     page,
		PageSize: pageSize,
		SortBy:   sortBy,
		Asc:      asc == 1,
		Offset:   offset,
		Limit:    limit,
	}
}