package alicloud

import (
	"fmt"
	"regexp"
	"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"
	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
)

func dataSourceAlicloudAlidnsCustomLines() *schema.Resource {
	return &schema.Resource{
		Read: dataSourceAlicloudAlidnsCustomLinesRead,
		Schema: map[string]*schema.Schema{
			"ids": {
				Type:     schema.TypeList,
				Optional: true,
				ForceNew: true,
				Elem:     &schema.Schema{Type: schema.TypeString},
				Computed: true,
			},
			"domain_name": {
				Type:     schema.TypeString,
				Required: true,
				ForceNew: true,
			},
			"name_regex": {
				Type:         schema.TypeString,
				Optional:     true,
				ValidateFunc: validation.ValidateRegexp,
				ForceNew:     true,
			},
			"names": {
				Type:     schema.TypeList,
				Elem:     &schema.Schema{Type: schema.TypeString},
				Computed: true,
			},
			"lang": {
				Type:     schema.TypeString,
				Optional: true,
				ForceNew: true,
			},
			"output_file": {
				Type:     schema.TypeString,
				Optional: true,
			},
			"lines": {
				Type:     schema.TypeList,
				Computed: true,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"code": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"id": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"custom_line_id": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"custom_line_name": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"domain_name": {
							Type:     schema.TypeString,
							Computed: true,
						},
						"ip_segment_list": {
							Type:     schema.TypeList,
							Computed: true,
							Elem: &schema.Resource{
								Schema: map[string]*schema.Schema{
									"end_ip": {
										Type:     schema.TypeString,
										Computed: true,
									},
									"start_ip": {
										Type:     schema.TypeString,
										Computed: true,
									},
								},
							},
						},
					},
				},
			},
			"enable_details": {
				Type:     schema.TypeBool,
				Optional: true,
				Default:  false,
			},
		},
	}
}

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

	action := "DescribeCustomLines"
	request := make(map[string]interface{})
	if v, ok := d.GetOk("lang"); ok {
		request["Lang"] = v
	}
	request["DomainName"] = d.Get("domain_name")
	request["PageSize"] = PageSizeLarge
	request["PageNumber"] = 1
	var objects []map[string]interface{}
	var customLineNameRegex *regexp.Regexp
	if v, ok := d.GetOk("name_regex"); ok {
		r, err := regexp.Compile(v.(string))
		if err != nil {
			return WrapError(err)
		}
		customLineNameRegex = r
	}

	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("Alidns", "2015-01-09", 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_alidns_custom_lines", action, AlibabaCloudSdkGoERROR)
		}
		resp, err := jsonpath.Get("$.CustomLines", response)
		if err != nil {
			return WrapErrorf(err, FailedGetAttributeMsg, action, "$.CustomLines", response)
		}
		result, _ := resp.([]interface{})
		for _, v := range result {
			item := v.(map[string]interface{})
			if customLineNameRegex != nil && !customLineNameRegex.MatchString(fmt.Sprint(item["Name"])) {
				continue
			}
			if len(idsMap) > 0 {
				if _, ok := idsMap[fmt.Sprint(item["Id"])]; !ok {
					continue
				}
			}
			objects = append(objects, item)
		}
		if len(result) < PageSizeLarge {
			break
		}
		request["PageNumber"] = request["PageNumber"].(int) + 1
	}
	ids := make([]string, 0)
	names := make([]interface{}, 0)
	s := make([]map[string]interface{}, 0)
	for _, object := range objects {
		mapping := map[string]interface{}{
			"code":             object["Code"],
			"id":               fmt.Sprint(object["Id"]),
			"custom_line_id":   fmt.Sprint(object["Id"]),
			"custom_line_name": object["Name"],
		}
		ids = append(ids, fmt.Sprint(mapping["id"]))
		names = append(names, object["Name"])
		if detailedEnabled := d.Get("enable_details"); !detailedEnabled.(bool) {
			s = append(s, mapping)
			continue
		}
		id := fmt.Sprint(object["Id"])
		alidnsService := AlidnsService{client}
		getResp, err := alidnsService.DescribeAlidnsCustomLine(id)
		if err != nil {
			return WrapError(err)
		}
		mapping["domain_name"] = getResp["DomainName"]
		if ipSegmentList, ok := object["IpSegmentList"]; ok {
			ipSegments := make([]map[string]interface{}, 0)
			for _, ipSegmentListItem := range ipSegmentList.([]interface{}) {
				ipSegmentMap := ipSegmentListItem.(map[string]interface{})
				ipSegmentArg := make(map[string]interface{}, 0)
				ipSegmentArg["end_ip"] = ipSegmentMap["EndIp"]
				ipSegmentArg["start_ip"] = ipSegmentMap["StartIp"]
				ipSegments = append(ipSegments, ipSegmentArg)
			}
			mapping["ip_segment_list"] = ipSegments
		}
		s = append(s, mapping)
	}

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

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

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

	return nil
}
