package sandbox

import (
	"encoding/json"
	"fmt"
	"net"
	"net/url"
	"strconv"
	"strings"

	"github.com/TeaOSLab/EdgeAdmin/internal/web/actions/actionutils"
	"github.com/iwind/TeaGo/maps"
)

type TestAction struct {
	actionutils.ParentAction
}

func (this *TestAction) RunPost(params struct {
	AppId          string
	Domain         string
	ClientIp       string
	Qtype          string
	SDNSParamsJSON string
}) {
	if len(params.ClientIp) == 0 {
		params.ClientIp = "203.0.113.100"
	}
	params.SDNSParamsJSON = strings.TrimSpace(params.SDNSParamsJSON)

	sdnsParams, err := parseSDNSParamsJSON(params.SDNSParamsJSON)
	if err != nil {
		this.Fail(err.Error())
		return
	}

	clientSubnet := this.maskSubnet(params.ClientIp, 24, 56)
	if len(clientSubnet) == 0 {
		clientSubnet = "203.0.113.0/24"
	}

	sniPolicy := "empty"
	publicSNI := ""
	ecsMode := "off"
	ecsIPv4Prefix := 24
	ecsIPv6Prefix := 56
	pinningMode := "off"
	sanMode := "off"
	query := url.Values{}
	query.Set("appId", params.AppId)
	query.Set("dn", params.Domain)
	query.Set("cip", params.ClientIp)
	query.Set("qtype", params.Qtype)
	for _, item := range sdnsParams {
		query.Add("sdns_"+item.GetString("name"), item.GetString("value"))
	}
	requestURL := "https://api.httpdns.example.com/resolve?" + query.Encode()

	this.Data["result"] = maps.Map{
		"code":      0,
		"message":   "ok (mock)",
		"requestId": "mock-rid-20260221-001",
		"data": maps.Map{
			"request_url":       requestURL,
			"client_ip":         params.ClientIp,
			"client_region":     "中国, 上海, 上海",
			"line_name":         "默认线路",
			"sdns_params":       sdnsParams,
			"ips":               []string{"203.0.113.10", "203.0.113.11"},
			"records": []maps.Map{
				{
					"domain": params.Domain,
					"type":   params.Qtype,
					"ip":     "203.0.113.10",
					"ttl":    30,
					"region": "中国-上海-上海",
					"line":   "默认线路",
				},
				{
					"domain": params.Domain,
					"type":   params.Qtype,
					"ip":     "203.0.113.11",
					"ttl":    30,
					"region": "中国-上海-上海",
					"line":   "默认线路",
				},
			},
			"ttl":               30,
			"sni_policy":        sniPolicy,
			"public_sni":        publicSNI,
			"client_subnet":     clientSubnet,
			"ecs_mode":          ecsMode,
			"ecs_ipv4_prefix":   ecsIPv4Prefix,
			"ecs_ipv6_prefix":   ecsIPv6Prefix,
			"pinning_mode":      pinningMode,
			"san_mode":          sanMode,
			"fingerprint_algo":  "sha256",
			"cert_fingerprints": []string{"8f41ab8d32fca7f9a2b0fdd09a0e2ccf31e5579cd3a0b65f1a9f2f2ec8f38d4a"},
			"verify_headers": maps.Map{
				"X-Edge-Resolve-AppId":  params.AppId,
				"X-Edge-Resolve-Expire": "1768953600",
				"X-Edge-Resolve-Nonce":  "mock-nonce-123456",
				"X-Edge-Resolve-Target": params.Domain,
				"X-Edge-Resolve-Sign":   "mock-signature-base64url",
			},
		},
	}
	this.Success()
}

func parseSDNSParamsJSON(raw string) ([]maps.Map, error) {
	if len(raw) == 0 {
		return []maps.Map{}, nil
	}

	list := []maps.Map{}
	if err := json.Unmarshal([]byte(raw), &list); err != nil {
		return nil, err
	}
	if len(list) > 10 {
		return nil, fmt.Errorf("sdns params should be <= 10")
	}

	result := make([]maps.Map, 0, len(list))
	for _, item := range list {
		name := strings.TrimSpace(item.GetString("name"))
		value := strings.TrimSpace(item.GetString("value"))
		if len(name) == 0 && len(value) == 0 {
			continue
		}
		if len(name) == 0 || len(name) > 64 {
			return nil, fmt.Errorf("sdns param name should be in 1-64")
		}
		if len(value) == 0 || len(value) > 64 {
			return nil, fmt.Errorf("sdns param value should be in 1-64")
		}
		result = append(result, maps.Map{
			"name":  name,
			"value": value,
		})
	}

	if len(result) > 10 {
		return nil, fmt.Errorf("sdns params should be <= 10")
	}
	return result, nil
}

func (this *TestAction) maskSubnet(ip string, ipv4Prefix int, ipv6Prefix int) string {
	parsed := net.ParseIP(ip)
	if parsed == nil {
		return ""
	}

	ipv4 := parsed.To4()
	if ipv4 != nil {
		mask := net.CIDRMask(ipv4Prefix, 32)
		return ipv4.Mask(mask).String() + "/" + strconv.Itoa(ipv4Prefix)
	}

	mask := net.CIDRMask(ipv6Prefix, 128)
	return parsed.Mask(mask).String() + "/" + strconv.Itoa(ipv6Prefix)
}