package via

import (
	"time"

	"github.com/alexedwards/scs/v2"
	"github.com/rs/zerolog"
)

func ptr(l zerolog.Level) *zerolog.Level { return &l }

var (
	LogLevelDebug = ptr(zerolog.DebugLevel)
	LogLevelInfo  = ptr(zerolog.InfoLevel)
	LogLevelWarn  = ptr(zerolog.WarnLevel)
	LogLevelError = ptr(zerolog.ErrorLevel)
)

// Plugin is a func that can mutate the given *via.V app runtime. It is useful to integrate popular JS/CSS UI libraries or tools.
type Plugin func(v *V)

// Options defines configuration options for the via application
type Options struct {
	// The development mode flag. If true, enables server and browser auto-reload on `.go` file changes.
	DevMode bool

	// The http server address. e.g. ':3000'
	ServerAddress string

	// LogLevel sets the minimum log level. nil keeps the default (Info).
	LogLevel *zerolog.Level

	// Logger overrides the default logger entirely. When set, LogLevel and
	// DevMode have no effect on logging.
	Logger *zerolog.Logger

	// The title of the HTML document.
	DocumentTitle string

	// Plugins to extend the capabilities of the `Via` application.
	Plugins []Plugin

	// SessionManager enables cookie-based sessions. If set, Via wraps handlers
	// with scs LoadAndSave middleware. Configure the session manager before
	// passing it (lifetime, cookie settings, store, etc).
	SessionManager *scs.SessionManager

	// DatastarContent is the Datastar.js script content.
	// If nil, the embedded default is used.
	DatastarContent []byte

	// DatastarPath is the URL path where the script is served.
	// Defaults to "/_datastar.js" if empty.
	DatastarPath string

	// PubSub enables publish/subscribe messaging. Use vianats.New() for an
	// embedded NATS backend, or supply any PubSub implementation.
	PubSub PubSub

	// ContextTTL is the maximum time a context may exist without an SSE
	// connection before the background reaper disposes it.
	// Default: 30s. Negative value disables the reaper.
	ContextTTL time.Duration
}