package portainer

import (
	"io"
)

type (
	// Pair defines a key/value string pair
	Pair struct {
		Name  string `json:"name"`
		Value string `json:"value"`
	}

	// CLIFlags represents the available flags on the CLI.
	CLIFlags struct {
		Addr              *string
		Assets            *string
		Data              *string
		ExternalEndpoints *string
		SyncInterval      *string
		Endpoint          *string
		Labels            *[]Pair
		Logo              *string
		Templates         *string
		NoAuth            *bool
		NoAnalytics       *bool
		TLSVerify         *bool
		TLSCacert         *string
		TLSCert           *string
		TLSKey            *string
	}

	// Settings represents Portainer settings.
	Settings struct {
		HiddenLabels       []Pair `json:"hiddenLabels"`
		Logo               string `json:"logo"`
		Authentication     bool   `json:"authentication"`
		Analytics          bool   `json:"analytics"`
		EndpointManagement bool   `json:"endpointManagement"`
	}

	// User represent a user account.
	User struct {
		ID       UserID   `json:"Id"`
		Username string   `json:"Username"`
		Password string   `json:"Password,omitempty"`
		Role     UserRole `json:"Role"`
	}

	// UserID represents a user identifier
	UserID int

	// UserRole represents the role of a user. It can be either an administrator
	// or a regular user.
	UserRole int

	// TokenData represents the data embedded in a JWT token.
	TokenData struct {
		ID       UserID
		Username string
		Role     UserRole
	}

	// EndpointID represents an endpoint identifier.
	EndpointID int

	// Endpoint represents a Docker endpoint with all the info required
	// to connect to it.
	Endpoint struct {
		ID              EndpointID `json:"Id"`
		Name            string     `json:"Name"`
		URL             string     `json:"URL"`
		TLS             bool       `json:"TLS"`
		TLSCACertPath   string     `json:"TLSCACert,omitempty"`
		TLSCertPath     string     `json:"TLSCert,omitempty"`
		TLSKeyPath      string     `json:"TLSKey,omitempty"`
		AuthorizedUsers []UserID   `json:"AuthorizedUsers"`
	}

	// ResourceControl represent a reference to a Docker resource with specific controls
	ResourceControl struct {
		OwnerID     UserID              `json:"OwnerId"`
		ResourceID  string              `json:"ResourceId"`
		AccessLevel ResourceAccessLevel `json:"AccessLevel"`
	}

	// ResourceControlType represents a type of resource control.
	// Can be one of: container, service or volume.
	ResourceControlType int

	// ResourceAccessLevel represents the level of control associated to a resource for a specific owner.
	// Can be one of: full, restricted, limited.
	ResourceAccessLevel int

	// TLSFileType represents a type of TLS file required to connect to a Docker endpoint.
	// It can be either a TLS CA file, a TLS certificate file or a TLS key file.
	TLSFileType int

	// CLIService represents a service for managing CLI.
	CLIService interface {
		ParseFlags(version string) (*CLIFlags, error)
		ValidateFlags(flags *CLIFlags) error
	}

	// DataStore defines the interface to manage the data.
	DataStore interface {
		Open() error
		Close() error
		MigrateData() error
	}

	// Server defines the interface to serve the API.
	Server interface {
		Start() error
	}

	// UserService represents a service for managing user data.
	UserService interface {
		User(ID UserID) (*User, error)
		UserByUsername(username string) (*User, error)
		Users() ([]User, error)
		UsersByRole(role UserRole) ([]User, error)
		CreateUser(user *User) error
		UpdateUser(ID UserID, user *User) error
		DeleteUser(ID UserID) error
	}

	// EndpointService represents a service for managing endpoint data.
	EndpointService interface {
		Endpoint(ID EndpointID) (*Endpoint, error)
		Endpoints() ([]Endpoint, error)
		CreateEndpoint(endpoint *Endpoint) error
		UpdateEndpoint(ID EndpointID, endpoint *Endpoint) error
		DeleteEndpoint(ID EndpointID) error
		Synchronize(toCreate, toUpdate, toDelete []*Endpoint) error
	}

	// VersionService represents a service for managing version data.
	VersionService interface {
		DBVersion() (int, error)
		StoreDBVersion(version int) error
	}

	// ResourceControlService represents a service for managing resource control data.
	ResourceControlService interface {
		ResourceControl(resourceID string, rcType ResourceControlType) (*ResourceControl, error)
		ResourceControls(rcType ResourceControlType) ([]ResourceControl, error)
		CreateResourceControl(resourceID string, rc *ResourceControl, rcType ResourceControlType) error
		DeleteResourceControl(resourceID string, rcType ResourceControlType) error
	}

	// CryptoService represents a service for encrypting/hashing data.
	CryptoService interface {
		Hash(data string) (string, error)
		CompareHashAndData(hash string, data string) error
	}

	// JWTService represents a service for managing JWT tokens.
	JWTService interface {
		GenerateToken(data *TokenData) (string, error)
		ParseAndVerifyToken(token string) (*TokenData, error)
	}

	// FileService represents a service for managing files.
	FileService interface {
		StoreTLSFile(endpointID EndpointID, fileType TLSFileType, r io.Reader) error
		GetPathForTLSFile(endpointID EndpointID, fileType TLSFileType) (string, error)
		DeleteTLSFiles(endpointID EndpointID) error
	}

	// EndpointWatcher represents a service to synchronize the endpoints via an external source.
	EndpointWatcher interface {
		WatchEndpointFile(endpointFilePath string) error
	}
)

const (
	// APIVersion is the version number of Portainer API.
	APIVersion = "1.12.4"
	// DBVersion is the version number of Portainer database.
	DBVersion = 1
)

const (
	// TLSFileCA represents a TLS CA certificate file.
	TLSFileCA TLSFileType = iota
	// TLSFileCert represents a TLS certificate file.
	TLSFileCert
	// TLSFileKey represents a TLS key file.
	TLSFileKey
)

const (
	_ UserRole = iota
	// AdministratorRole represents an administrator user role
	AdministratorRole
	// StandardUserRole represents a regular user role
	StandardUserRole
)

const (
	_ ResourceControlType = iota
	// ContainerResourceControl represents a resource control for a container
	ContainerResourceControl
	// ServiceResourceControl represents a resource control for a service
	ServiceResourceControl
	// VolumeResourceControl represents a resource control for a volume
	VolumeResourceControl
)

const (
	_ ResourceAccessLevel = iota
	// RestrictedResourceAccessLevel represents a restricted access level on a resource (private ownership)
	RestrictedResourceAccessLevel
)