config

type Config interface {
	// Write writes the config to the given writer. If w is nil, the config is written to the config file.
	Write(w io.Writer) error

	// Read reads the config from the flags, env and the given config file f.
	// f can be of the following types:
	// - nil: the default config file is used
	// - string: the path to the config file
	// - io.Reader: the config is read from the reader
	// - []byte: the config is read from the byte slice
	// - any other type: an error is returned
	Read(f any) error

	// ActiveContext returns the currently active context
	ActiveContext() Context
	// SetActiveContext sets the currently active context and also modifies the schema to reflect this change
	// This does NOT change any configuration values. Use [config.Config.UseConfig] to read the actual context into memory.
	SetActiveContext(Context)
	// Contexts returns a list of currently loaded contexts
	Contexts() []Context
	// SetContexts sets the list of contexts and also modifies the schema to reflect this change
	SetContexts([]Context)
	// UseContext temporarily switches context to the given context name and reloads the config, loading the values of the given context.
	// If name is nil, the context is unloaded and only the global preferences are used.
	// This change will not be written to the schema, so `active_context` will not be changed after writing.
	UseContext(name *string) error

	// Preferences returns the global preferences (as opposed to [Context.Preferences])
	Preferences() Preferences
	// Viper returns the currently active instance of viper
	Viper() *viper.Viper
	// FlagSet returns the FlagSet that options are bound to
	FlagSet() *pflag.FlagSet

	// Path returns the path to the used config file
	Path() string
	// Schema returns the TOML schema of the config file as a struct
	Schema() *Schema
}

type Context interface {
	Name() string
	Token() string
	Preferences() Preferences
}

type IOption interface {

	// GetName returns the name of the option
	GetName() string
	// GetDescription returns the description of the option
	GetDescription() string
	// ConfigKey returns the key used in the config file. If the option is not configurable via the config file, an empty string is returned
	ConfigKey() string
	// EnvVar returns the name of the environment variable. If the option is not configurable via an environment variable, an empty string is returned
	EnvVar() string
	// FlagName returns the name of the flag. If the option is not configurable via a flag, an empty string is returned
	FlagName() string
	// HasFlags returns true if the option has all the provided flags set
	HasFlags(src OptionFlag) bool
	// GetAsAny reads the option value from the config and returns it as an any
	GetAsAny(c Config) any
	// OverrideAny sets the option value in the config to the provided any value
	OverrideAny(c Config, v any)
	// Changed returns true if the option has been changed from the default
	Changed(c Config) bool
	// Completions returns a list of possible completions for the option (for example for boolean options: "true", "false")
	Completions() []string
	// Parse parses a string slice (for example command arguments) based on the option type and returns the parsed value as an any
	Parse(values []string) (any, error)
	// T returns an instance of the type of the option as an any
	T() any
	// contains filtered or unexported methods
}

type MockConfig struct {
	Config
}

type Option[T any] struct {
	Name        string
	Description string
	Default     T
	Flags       OptionFlag
	// contains filtered or unexported fields
}

type OptionFlag int

type Preferences map[string]any

type Schema struct {
	ActiveContext string      `toml:"active_context"`
	Preferences   Preferences `toml:"preferences"`
	Contexts      []*context  `toml:"contexts,omitempty"`
}