package internal

import "net/url"

const (
	// InvalidConfigValue is the constant value for invalid config values
	// which must be changed for production configurations before successful
	// startup
	InvalidConfigValue = "INVALID CONFIG VALUE - PLEASE CHANGE THIS VALUE"

	// DefaultDebug is the default debug mode
	DefaultDebug = false

	// DefaultTLS is the default for whether to enable TLS
	DefaultTLS = false

	// DefaultTLSKey is the default path to a TLS private key (if blank uses Let's Encrypt)
	DefaultTLSKey = ""

	// DefaultTLSCert is the default path to a TLS certificate (if blank uses Let's Encrypt)
	DefaultTLSCert = ""

	// DefaultData is the default data directory for storage
	DefaultData = "./data"

	// DefaultStore is the default data store used for accounts, sessions, etc
	DefaultStore = "bitcask://saltyim.db"

	// DefaultBaseURL is the default Base URL for the server
	DefaultBaseURL = "http://0.0.0.0:8000"

	// DefaultAdminUser is the default publickye to grant admin privileges to
	DefaultAdminUser = ""

	// DefaultAdminEmail is the default email of the admin user used in support requests
	DefaultAdminEmail = "support@salty.im"
)

func NewConfig() *Config {
	return &Config{
		Debug:      DefaultDebug,
		Store:      DefaultStore,
		BaseURL:    DefaultBaseURL,
		AdminUser:  DefaultAdminUser,
		AdminEmail: DefaultAdminEmail,
	}
}

// Option is a function that takes a config struct and modifies it
type Option func(*Config) error

// WithDebug sets the debug mode lfag
func WithDebug(debug bool) Option {
	return func(cfg *Config) error {
		cfg.Debug = debug
		return nil
	}
}

// WithTLS sets the tls flag
func WithTLS(tls bool) Option {
	return func(cfg *Config) error {
		cfg.TLS = tls
		return nil
	}
}

// WithTLSKey sets the path to a TLS private key
func WithTLSKey(tlsKey string) Option {
	return func(cfg *Config) error {
		cfg.TLSKey = tlsKey
		return nil
	}
}

// WithTLSCert sets the path to a TLS certificate
func WithTLSCert(tlsCert string) Option {
	return func(cfg *Config) error {
		cfg.TLSCert = tlsCert
		return nil
	}
}

// WithData sets the data directory to use for storage
func WithData(data string) Option {
	return func(cfg *Config) error {
		cfg.Data = data
		return nil
	}
}

// WithStore sets the store to use for accounts, sessions, etc.
func WithStore(store string) Option {
	return func(cfg *Config) error {
		cfg.Store = store
		return nil
	}
}

// WithBaseURL sets the Base URL used for constructing feed URLs
func WithBaseURL(baseURL string) Option {
	return func(cfg *Config) error {
		u, err := url.Parse(baseURL)
		if err != nil {
			return err
		}
		cfg.BaseURL = baseURL
		cfg.baseURL = u
		return nil
	}
}

// WithAdminUser sets the Admin user used for granting special features to
func WithAdminUser(adminUser string) Option {
	return func(cfg *Config) error {
		cfg.AdminUser = adminUser
		return nil
	}
}

// WithAdminEmail sets the Admin email used to contact the pod operator
func WithAdminEmail(adminEmail string) Option {
	return func(cfg *Config) error {
		cfg.AdminEmail = adminEmail
		return nil
	}
}