package port

import (
	"context"

	"github.com/orchard9/rdev/internal/domain"
)

// NotifyProvisioner manages per-project email delivery on the notify service.
// Under the shared-host model, default projects do not receive a dedicated sending
// host. Instead, a single pre-provisioned platform host (e.g., "mail.threesix.ai")
// is shared by all default projects. Per-project provisioning creates only an
// account, a send key, and a host grant (3 API calls). Custom domains still receive
// a dedicated host via ReprovisionNotifyHost.
type NotifyProvisioner interface {
	// CreateProjectNotify creates a notify account, a send key, and grants the
	// account access to the shared platform sending host. No per-project host,
	// Resend domain, or DNS records are created for default projects.
	CreateProjectNotify(ctx context.Context, projectID, slug string) (*domain.NotifyCredentials, error)

	// DeleteProjectNotify removes notify resources for a project.
	// The notify account (and all its keys) is always deleted.
	// If perProjectHost is non-empty, the custom sending host, Resend domain
	// (when resendDomainID is non-empty), and DNS records are also deleted.
	// For default projects where perProjectHost is empty, only the account is deleted.
	DeleteProjectNotify(ctx context.Context, projectID, perProjectHost, resendDomainID string) error

	// GetProjectNotify returns notify credentials for a project, or nil if not provisioned.
	// Only AccountID and CreatedAt are recoverable; use this solely to check whether
	// provisioning has already occurred (non-nil return = already provisioned).
	GetProjectNotify(ctx context.Context, projectID string) (*domain.NotifyCredentials, error)

	// TestConnection verifies the admin API key and notify service are reachable.
	TestConnection(ctx context.Context) error

	// VerifyProjectNotify triggers Resend domain verification for the given resend domain ID.
	// Should be called after DNS records have had time to propagate.
	VerifyProjectNotify(ctx context.Context, projectID, resendDomainID string) error

	// GetNotifyDomainStatus returns the Resend verification status for the project's email domain.
	GetNotifyDomainStatus(ctx context.Context, host, resendDomainID string) (*domain.NotifyDomainStatus, error)

	// ProvisionNotifyDomain creates the Resend domain for an existing notify host,
	// adds DKIM/SPF DNS records, and starts async verification.
	// Use this to repair projects where steps 7-9 of CreateProjectNotify failed.
	// Returns the Resend domain ID for storage in the credential store.
	ProvisionNotifyDomain(ctx context.Context, projectID, host string) (resendDomainID string, err error)

	// ReprovisionNotifyHost migrates a project's notify setup to a new sending host.
	// Tears down oldHost's notify host entry, Resend domain, and DNS records, then
	// creates new ones for newHost. The project's account and send key are preserved.
	// Returns host credentials (Host, From, ResendDomainID) for storage in the credential store.
	ReprovisionNotifyHost(ctx context.Context, projectID, oldHost, oldResendDomainID, newHost string) (*domain.NotifyHostCredentials, error)
}