package main

import (
	"fmt"
	"io"
	"log"

	"github.com/pulumi/pulumi-oci/sdk/go/oci/email"
	"github.com/pulumi/pulumi-oci/sdk/go/oci/identity"
	"github.com/pulumi/pulumi-oci/sdk/go/oci/logging"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi/config"
)

func setupEmails(ctx *pulumi.Context, ocicfg *config.Config, compartment *identity.Compartment) (io.Reader, *identity.SmtpCredential, error) {
	// Configure domain for email delivery
	email_domain, err := email.NewEmailDomain(ctx, "happyDomain-domain", &email.EmailDomainArgs{
		CompartmentId: compartment.ID(),
		Name:          pulumi.String("happydomain.org"),
	})
	if err != nil {
		return nil, nil, err
	}

	loggroup, err := logging.NewLogGroup(ctx, "happyDomain-email-loggroup", &logging.LogGroupArgs{
		CompartmentId: compartment.ID(),
		DisplayName:   pulumi.String("email-log-group"),
		Description:   pulumi.String("email log group"),
	})
	if err != nil {
		return nil, nil, err
	}

	_, err = logging.NewLog(ctx, "happyDomain-relayed-email-logging", &logging.LogArgs{
		DisplayName: pulumi.String("relayed-email-logging"),
		LogGroupId:  loggroup.ID(),
		LogType:     pulumi.String("SERVICE"),
		Configuration: &logging.LogConfigurationArgs{
			Source: &logging.LogConfigurationSourceArgs{
				Category:   pulumi.String("outboundrelayed"),
				Resource:   email_domain.ID(),
				Service:    pulumi.String("emaildelivery"),
				SourceType: pulumi.String("OCISERVICE"),
			},
			CompartmentId: compartment.ID(),
		},
		RetentionDuration: pulumi.Int(30),
	})
	if err != nil {
		return nil, nil, err
	}

	_, err = logging.NewLog(ctx, "happyDomain-accepted-email-logging", &logging.LogArgs{
		DisplayName: pulumi.String("accepted-email-logging"),
		LogGroupId:  loggroup.ID(),
		LogType:     pulumi.String("SERVICE"),
		Configuration: &logging.LogConfigurationArgs{
			Source: &logging.LogConfigurationSourceArgs{
				Category:   pulumi.String("outboundaccepted"),
				Resource:   email_domain.ID(),
				Service:    pulumi.String("emaildelivery"),
				SourceType: pulumi.String("OCISERVICE"),
			},
			CompartmentId: compartment.ID(),
		},
		RetentionDuration: pulumi.Int(30),
	})
	if err != nil {
		return nil, nil, err
	}

	// DKIM
	dkim, err := email.NewDkim(ctx, "happyDomain-dkim", &email.DkimArgs{
		EmailDomainId: email_domain.ID(),
	})
	if err != nil {
		return nil, nil, err
	}

	// Export the infos
	ctx.Export("dkim-domain-to-add", dkim.DnsSubdomainName)
	ctx.Export("dkim-domain-cname-to", dkim.CnameRecordValue)

	// Approved senders
	_, err = email.NewSender(ctx, "happyDomain-sender1", &email.SenderArgs{
		CompartmentId: compartment.ID(),
		EmailAddress:  pulumi.String("contact@happydomain.org"),
	})
	if err != nil {
		return nil, nil, err
	}

	_, err = email.NewSender(ctx, "happyDomain-sender-bis", &email.SenderArgs{
		CompartmentId: compartment.ID(),
		EmailAddress:  pulumi.String("no-reply@happydomain.org"),
	})
	if err != nil {
		return nil, nil, err
	}

	_, err = email.NewSender(ctx, "happyDomain-sender-ter", &email.SenderArgs{
		CompartmentId: compartment.ID(),
		EmailAddress:  pulumi.String("noreply@happydomain.org"),
	})
	if err != nil {
		return nil, nil, err
	}

	// Identity for mail sender
	user, err := identity.NewUser(ctx, "happyDomain-smtp-user", &identity.UserArgs{
		CompartmentId: ocicfg.RequireSecret("tenancyOcid"),
		Description:   pulumi.String("SMTP user for happyDomain"),
		Name:          pulumi.String("happyDomain"),
		Email:         pulumi.String("postmaster+smtp@happydomain.org"),
	})
	if err != nil {
		return nil, nil, err
	}

	_, err = identity.NewUserCapabilitiesManagement(ctx, "happyDomain-smtp-user-caps", &identity.UserCapabilitiesManagementArgs{
		UserId:                   user.ID(),
		CanUseApiKeys:            pulumi.Bool(true),
		CanUseAuthTokens:         pulumi.Bool(false),
		CanUseConsolePassword:    pulumi.Bool(false),
		CanUseCustomerSecretKeys: pulumi.Bool(false),
		CanUseSmtpCredentials:    pulumi.Bool(true),
	})
	if err != nil {
		return nil, nil, err
	}

	// Create groups
	smtpGroup, err := identity.NewGroup(ctx, "happyDomain-smtp-group", &identity.GroupArgs{
		Name:        pulumi.String("SMTP"),
		Description: pulumi.String("Users that can send emails and manage suppression list"),
	})
	if err != nil {
		return nil, nil, err
	}

	// Add users to groups
	_, err = identity.NewUserGroupMembership(ctx, "listmonk-smtp-membership", &identity.UserGroupMembershipArgs{
		GroupId: smtpGroup.ID(),
		UserId:  user.ID(),
	})
	if err != nil {
		return nil, nil, err
	}

	// Define policy for the group
	compartment.Name.ApplyT(func(compartmentName string) string {
		compartment.CompartmentId.ApplyT(func(compartmentId string) (string, error) {
			var statements pulumi.StringArray
			statements = append(statements, pulumi.String(fmt.Sprintf("Allow group 'Default'/'SMTP' to use email-family in compartment %s", compartmentName)))
			statements = append(statements, pulumi.String("Allow group 'Default'/'SMTP' to manage suppressions in tenancy"))

			_, err := identity.NewPolicy(ctx, "happyDomain-listmonk-send-mail", &identity.PolicyArgs{
				CompartmentId: pulumi.String(compartmentId),
				Name:          pulumi.String("happyDomain-listmonk-send-mail"),
				Description:   pulumi.String("let listmonk send mail"),
				Statements:    statements,
			})
			if err != nil {
				log.Println(err.Error())
				return "", err
			}
			return "", err
		})
		return ""
	})

	// Create SMTP credentials
	creds, err := identity.NewSmtpCredential(ctx, "happyDomain-smtp-user-credentials", &identity.SmtpCredentialArgs{
		Description: pulumi.String("HAPPYDOMAIN SMTP credentials"),
		UserId:      user.ID(),
	})
	if err != nil {
		return nil, nil, err
	}

	// Create API key
	pemprvkey, pempubkey, err := generateOrRetrieveRSAKeys("happyDomain-smtp", 2048)
	if err != nil {
		return nil, nil, err
	}

	_, err = identity.NewApiKey(ctx, "happyDomain-smtp-user-apikey", &identity.ApiKeyArgs{
		KeyValue: pulumi.String(string(pempubkey)),
		UserId:   user.ID(),
	})
	if err != nil {
		return nil, nil, err
	}

	// Export SMTP password
	ctx.Export("smtp-username", creds.Username)
	ctx.Export("smtp-password", creds.Password)

	// Configure RP
	_, err = email.NewEmailReturnPath(ctx, "happyDomain-rp", &email.EmailReturnPathArgs{
		ParentResourceId: email_domain.ID(),
		Name:             pulumi.String(ocicfg.Require("region") + ".rp.happydomain.org"),
		Description:      pulumi.String("ReturnPath for happydomain.org"),
	})
	if err != nil {
		log.Println(err.Error())
		return nil, nil, err
	}

	return pemprvkey, creds, nil
}