package alicloud

import (
	"fmt"
	"time"

	"github.com/PaesslerAG/jsonpath"
	"github.com/aliyun/terraform-provider-alicloud/alicloud/connectivity"
	"github.com/hashicorp/terraform-plugin-sdk/helper/resource"
	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
)

func dataSourceAlicloudDataWorksFolders() *schema.Resource {
	return &schema.Resource{
		Read: dataSourceAlicloudDataWorksFoldersRead,
		Schema: map[string]*schema.Schema{
			"ids": {
				Type:     schema.TypeList,
				Optional: true,
				ForceNew: true,
				Elem:     &schema.Schema{Type: schema.TypeString},
				Computed: true,
			},
			"parent_folder_path": {
				Type:     schema.TypeString,
				Required: true,
				ForceNew: true,
			},
			"project_id": {
				Type:     schema.TypeString,
				Required: true,
				ForceNew: true,
			},
			"output_file": {
				Type:     schema.TypeString,
				Optional: true,
			},
			"folders": {
				Type:     schema.TypeList,
				Computed: true,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"id": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"folder_id": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"folder_path": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"project_id": {
							Type:     schema.TypeString,
							Computed: true,
						},
					},
				},
			},
		},
	}
}

func dataSourceAlicloudDataWorksFoldersRead(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*connectivity.AliyunClient)

	action := "ListFolders"
	request := make(map[string]interface{})
	folderPath := ConvertDataWorksFrontEndFolderPathToBackEndFolderPath(d.Get("parent_folder_path").(string))
	request["ParentFolderPath"] = folderPath
	if v, ok := d.GetOk("project_id"); ok {
		request["ProjectId"] = v
	}
	request["PageSize"] = PageSizeLarge
	request["PageNumber"] = 1
	var objects []map[string]interface{}

	idsMap := make(map[string]string)
	if v, ok := d.GetOk("ids"); ok {
		for _, vv := range v.([]interface{}) {
			if vv == nil {
				continue
			}
			idsMap[vv.(string)] = vv.(string)
		}
	}
	var response map[string]interface{}
	var err error
	for {
		wait := incrementalWait(3*time.Second, 3*time.Second)
		err = resource.Retry(5*time.Minute, func() *resource.RetryError {
			response, err = client.RpcPost("dataworks-public", "2020-05-18", action, nil, request, true)
			if err != nil {
				if NeedRetry(err) {
					wait()
					return resource.RetryableError(err)
				}
				return resource.NonRetryableError(err)
			}
			return nil
		})
		addDebug(action, response, request)
		if err != nil {
			return WrapErrorf(err, DataDefaultErrorMsg, "alicloud_data_works_folders", action, AlibabaCloudSdkGoERROR)
		}
		resp, err := jsonpath.Get("$.Data.Folders", response)
		if err != nil {
			return WrapErrorf(err, FailedGetAttributeMsg, action, "$.Data.Folders", response)
		}
		result, _ := resp.([]interface{})
		for _, v := range result {
			item := v.(map[string]interface{})
			if len(idsMap) > 0 {
				if _, ok := idsMap[fmt.Sprint(item["FolderId"])]; !ok {
					continue
				}
			}
			objects = append(objects, item)
		}
		if len(result) < PageSizeLarge {
			break
		}
		request["PageNumber"] = request["PageNumber"].(int) + 1
	}
	ids := make([]string, 0)
	s := make([]map[string]interface{}, 0)
	for _, object := range objects {
		mapping := map[string]interface{}{
			"id":          fmt.Sprint(object["FolderId"]),
			"folder_id":   fmt.Sprint(object["FolderId"]),
			"folder_path": ConvertDataWorksBackEndFolderPathToFrontEndFolderPath(object["FolderPath"].(string)),
			"project_id":  request["ProjectId"],
		}
		ids = append(ids, fmt.Sprint(mapping["id"]))
		id := fmt.Sprint(object["FolderId"], ":", request["ProjectId"])
		dataworksPublicService := DataworksPublicService{client}
		_, err := dataworksPublicService.DescribeDataWorksFolder(id)
		if err != nil {
			return WrapError(err)
		}
		s = append(s, mapping)
	}

	d.SetId(dataResourceIdHash(ids))
	if err := d.Set("ids", ids); err != nil {
		return WrapError(err)
	}

	if err := d.Set("folders", s); err != nil {
		return WrapError(err)
	}
	if output, ok := d.GetOk("output_file"); ok && output.(string) != "" {
		writeToFile(output.(string), s)
	}

	return nil
}
