//go:generate generate_permissions permissions.yaml permissions.go mailchimp
package mailchimp

import (
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"os"
	"strings"

	"github.com/fatih/color"
	"github.com/jedib0t/go-pretty/v6/table"
	"github.com/trufflesecurity/trufflehog/v3/pkg/analyzer/analyzers"
	"github.com/trufflesecurity/trufflehog/v3/pkg/analyzer/config"
	"github.com/trufflesecurity/trufflehog/v3/pkg/context"
)

const BASE_URL = "https://%s.api.mailchimp.com/3.0"

var _ analyzers.Analyzer = (*Analyzer)(nil)

type Analyzer struct {
	Cfg *config.Config
}

func (Analyzer) Type() analyzers.AnalyzerType { return analyzers.AnalyzerTypeMailchimp }

func (a Analyzer) Analyze(_ context.Context, credInfo map[string]string) (*analyzers.AnalyzerResult, error) {
	key, ok := credInfo["key"]
	if !ok {
		return nil, analyzers.NewAnalysisError(a.Type().String(), analyzers.OperationValidateCredentials, analyzers.ServiceConfig, "", errors.New("key not found in credentialInfo"),
		)
	}

	info, err := AnalyzePermissions(a.Cfg, key)
	if err != nil {
		return nil, analyzers.NewAnalysisError(a.Type().String(), analyzers.OperationAnalyzePermissions, analyzers.ServiceAPI, "", err,
		)
	}
	return secretInfoToAnalyzerResult(info), nil
}

func secretInfoToAnalyzerResult(info *SecretInfo) *analyzers.AnalyzerResult {
	if info == nil {
		return nil
	}
	result := analyzers.AnalyzerResult{
		AnalyzerType:       analyzers.AnalyzerTypeMailchimp,
		Bindings:           make([]analyzers.Binding, 0, len(StringToPermission)),
		UnboundedResources: make([]analyzers.Resource, 0, len(info.Domains.Domains)),
	}

	accountResource := analyzers.Resource{
		Name:               info.Metadata.AccountName,
		FullyQualifiedName: "mailchimp.com/account/" + info.Metadata.AccountID,
		Type:               "account",
		Metadata: map[string]any{
			"email":             info.Metadata.Email,
			"role":              info.Metadata.Role,
			"member_since":      info.Metadata.MemberSince,
			"pricing_plan":      info.Metadata.PricingPlan,
			"account_timezone":  info.Metadata.AccountTimezone,
			"last_login":        info.Metadata.LastLogin,
			"total_subscribers": info.Metadata.TotalSubscribers,
		},
	}

	for perm := range StringToPermission {
		result.Bindings = append(result.Bindings, analyzers.Binding{
			Resource: accountResource,
			Permission: analyzers.Permission{
				Value: perm,
			},
		})
	}

	for _, domain := range info.Domains.Domains {
		result.UnboundedResources = append(result.UnboundedResources, analyzers.Resource{
			Name:               domain.Domain,
			FullyQualifiedName: "mailchimp.com/domain/" + domain.Domain,
			Type:               "domain",
			Metadata: map[string]any{
				"verified":      domain.Verified,
				"authenticated": domain.Authenticated,
			},
			Parent: &accountResource,
		})
	}

	return &result
}

type MetadataJSON struct {
	AccountID       string `json:"account_id"`
	AccountName     string `json:"account_name"`
	Email           string `json:"email"`
	FirstName       string `json:"first_name"`
	LastName        string `json:"last_name"`
	Role            string `json:"role"`
	MemberSince     string `json:"member_since"`
	PricingPlan     string `json:"pricing_plan_type"`
	AccountTimezone string `json:"account_timezone"`
	Contact         struct {
		Company  string `json:"company"`
		Address1 string `json:"addr1"`
		Address2 string `json:"addr2"`
		City     string `json:"city"`
		State    string `json:"state"`
		Zip      string `json:"zip"`
		Country  string `json:"country"`
	} `json:"contact"`
	LastLogin        string `json:"last_login"`
	TotalSubscribers int    `json:"total_subscribers"`
}

type DomainsJSON struct {
	Domains []Domain `json:"domains"`
}

type Domain struct {
	Domain        string `json:"domain"`
	Authenticated bool   `json:"authenticated"`
	Verified      bool   `json:"verified"`
}

func getMetadata(cfg *config.Config, key string) (MetadataJSON, error) {
	var metadata MetadataJSON

	// extract datacenter
	keySplit := strings.Split(key, "-")
	if len(keySplit) != 2 {
		return metadata, nil
	}
	datacenter := keySplit[1]

	client := analyzers.NewAnalyzeClient(cfg)
	req, err := http.NewRequest("GET", fmt.Sprintf(BASE_URL, datacenter), nil)
	if err != nil {
		return metadata, err
	}

	req.SetBasicAuth("anystring", key)
	resp, err := client.Do(req)
	if err != nil {
		return metadata, err
	}

	defer func() { _ = resp.Body.Close() }()

	if err := json.NewDecoder(resp.Body).Decode(&metadata); err != nil {
		return metadata, err
	}

	return metadata, nil
}

func getDomains(cfg *config.Config, key string) (DomainsJSON, error) {
	var domains DomainsJSON

	// extract datacenter
	keySplit := strings.Split(key, "-")
	if len(keySplit) != 2 {
		return domains, nil
	}
	datacenter := keySplit[1]

	client := analyzers.NewAnalyzeClient(cfg)
	req, err := http.NewRequest("GET", fmt.Sprintf(BASE_URL, datacenter)+"/verified-domains", nil)
	if err != nil {
		return domains, err
	}

	req.SetBasicAuth("anystring", key)
	resp, err := client.Do(req)
	if err != nil {
		return domains, err
	}

	defer func() { _ = resp.Body.Close() }()

	if err := json.NewDecoder(resp.Body).Decode(&domains); err != nil {
		return domains, err
	}

	return domains, nil
}

type SecretInfo struct {
	Metadata MetadataJSON
	Domains  DomainsJSON
}

func AnalyzePermissions(cfg *config.Config, key string) (*SecretInfo, error) {
	// get metadata
	metadata, err := getMetadata(cfg, key)
	if err != nil {
		return nil, err
	}
	if metadata.AccountID == "" {
		return nil, fmt.Errorf("invalid Mailchimp API key")
	}

	// get sending domains
	domains, err := getDomains(cfg, key)
	if err != nil {
		return nil, err
	}

	return &SecretInfo{
		Metadata: metadata,
		Domains:  domains,
	}, nil
}

func AnalyzeAndPrintPermissions(cfg *config.Config, key string) {
	info, err := AnalyzePermissions(cfg, key)
	if err != nil {
		color.Red("[x] Error: %s", err.Error())
		return
	}

	printMetadata(info.Metadata)

	// print full api key permissions
	color.Green("\n[i] Permissions: Full Access\n\n")

	// print sending domains
	if len(info.Domains.Domains) > 0 {
		printDomains(info.Domains)
	} else {
		color.Yellow("[i] No sending domains found\n")
	}
}

func printMetadata(metadata MetadataJSON) {
	color.Green("[!] Valid Mailchimp API key\n\n")

	// print table with account info
	color.Yellow("[i] Mailchimp Account Info:\n")
	t := table.NewWriter()
	t.SetOutputMirror(os.Stdout)
	t.AppendRow([]any{("Account Name"), color.GreenString("%s", metadata.AccountName)})
	t.AppendRow([]any{("Company Name"), color.GreenString("%s", metadata.Contact.Company)})
	t.AppendRow([]any{("Address"), color.GreenString("%s %s\n%s, %s %s\n%s", metadata.Contact.Address1, metadata.Contact.Address2, metadata.Contact.City, metadata.Contact.State, metadata.Contact.Zip, metadata.Contact.Country)})
	t.AppendRow([]any{("Total Subscribers"), color.GreenString("%d", metadata.TotalSubscribers)})
	t.Render()

	// print user info
	color.Yellow("\n[i] Mailchimp User Info:\n")
	t = table.NewWriter()
	t.SetOutputMirror(os.Stdout)
	t.AppendRow([]any{("User Name"), color.GreenString("%s %s", metadata.FirstName, metadata.LastName)})
	t.AppendRow([]any{("User Email"), color.GreenString("%s", metadata.Email)})
	t.AppendRow([]any{("User Role"), color.GreenString("%s", metadata.Role)})
	t.AppendRow([]any{("Last Login"), color.GreenString("%s", metadata.LastLogin)})
	t.AppendRow([]any{("Member Since"), color.GreenString("%s", metadata.MemberSince)})
	t.Render()
}

func printDomains(domains DomainsJSON) {
	color.Yellow("\n[i] Sending Domains:\n")
	t := table.NewWriter()
	t.SetOutputMirror(os.Stdout)
	t.AppendHeader(table.Row{"Domain", "Enabled and Verified"})
	for _, domain := range domains.Domains {
		authenticated := ""
		if domain.Authenticated && domain.Verified {
			authenticated = color.GreenString("Yes")
		} else {
			authenticated = color.RedString("No")
		}
		t.AppendRow([]any{color.GreenString(domain.Domain), authenticated})
	}
	t.Render()
}
