package request

// PaginationRequest 分页请求
type PaginationRequest struct {
	Page  int `json:"page" form:"page" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	Limit int `json:"limit" form:"limit" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
}

// SortRequest 排序请求
type SortRequest struct {
	Sort  string `json:"sort" form:"sort" binding:"omitempty" validate:"omitempty"`
	Order string `json:"order" form:"order" binding:"omitempty,oneof=asc desc" validate:"omitempty,oneof=asc desc"`
}

// SearchRequest 搜索请求
type SearchRequest struct {
	Search string `json:"search" form:"search" binding:"omitempty,max=100" validate:"omitempty,max=100"`
}

// BaseListRequest 基础列表请求
type BaseListRequest struct {
	PaginationRequest
	SortRequest
	SearchRequest
}

// IDRequest ID 请求
type IDRequest struct {
	ID uint `json:"id" uri:"id" binding:"required,min=1" validate:"required,min=1"`
}

// SlugRequest Slug 请求
type SlugRequest struct {
	Slug string `json:"slug" uri:"slug" binding:"required,min=1" validate:"required,min=1"`
}

// BulkIDsRequest 批量 ID 请求
type BulkIDsRequest struct {
	IDs []uint `json:"ids" binding:"required,min=1" validate:"required,min=1"`
}

// StatusRequest 状态请求
type StatusRequest struct {
	IsActive *bool `json:"is_active" form:"is_active" binding:"omitempty"`
}

// TimeRangeRequest 时间范围请求
type TimeRangeRequest struct {
	StartDate string `json:"start_date" form:"start_date" binding:"omitempty" validate:"omitempty,datetime=2006-01-02"`
	EndDate   string `json:"end_date" form:"end_date" binding:"omitempty" validate:"omitempty,datetime=2006-01-02"`
}

// GetDefaultPagination 获取默认分页参数
func (p *PaginationRequest) GetDefaultPagination() (int, int) {
	page := p.Page
	if page <= 0 {
		page = 1
	}
	
	limit := p.Limit
	if limit <= 0 {
		limit = 20
	}
	if limit > 100 {
		limit = 100
	}
	
	return page, limit
}

// GetDefaultSort 获取默认排序参数
func (s *SortRequest) GetDefaultSort(defaultSort, defaultOrder string) (string, string) {
	sort := s.Sort
	if sort == "" {
		sort = defaultSort
	}
	
	order := s.Order
	if order == "" {
		order = defaultOrder
	}
	
	return sort, order
}

// GetOffset 计算偏移量
func (p *PaginationRequest) GetOffset() int {
	page, limit := p.GetDefaultPagination()
	return (page - 1) * limit
}