//
// Copyright (C) 2024 veypi <i@veypi.com>
// 2025-03-04 16:08:06
// Distributed under terms of the MIT license.
//

package policy

import (
	"github.com/veypi/vbase/cfg"
	"github.com/veypi/vbase/models"
	"github.com/veypi/vigo"
)

type ListRequest struct {
	Page     int    `json:"page" src:"query" default:"1"`
	PageSize int    `json:"page_size" src:"query" default:"20"`
	Resource string `json:"resource" src:"query" desc:"资源类型筛选"`
	Scope    string `json:"scope" src:"query" desc:"作用域筛选"`
}

type ListResponse struct {
	Items      []models.Policy `json:"items"`
	Total      int64           `json:"total"`
	Page       int             `json:"page"`
	PageSize   int             `json:"page_size"`
	TotalPages int             `json:"total_pages"`
}

func list(x *vigo.X, req *ListRequest) (*ListResponse, error) {
	db := cfg.DB().Model(&models.Policy{})

	if req.Resource != "" {
		db = db.Where("resource = ?", req.Resource)
	}
	if req.Scope != "" {
		db = db.Where("scope = ?", req.Scope)
	}

	var total int64
	if err := db.Count(&total).Error; err != nil {
		return nil, vigo.ErrInternalServer.WithError(err)
	}

	var policies []models.Policy
	offset := (req.Page - 1) * req.PageSize
	if err := db.Order("created_at DESC").Offset(offset).Limit(req.PageSize).Find(&policies).Error; err != nil {
		return nil, vigo.ErrInternalServer.WithError(err)
	}

	totalPages := int(total) / req.PageSize
	if int(total)%req.PageSize > 0 {
		totalPages++
	}

	return &ListResponse{
		Items:      policies,
		Total:      total,
		Page:       req.Page,
		PageSize:   req.PageSize,
		TotalPages: totalPages,
	}, nil
}