// Package command is a small module for setting up an small development server.
package command

import (
	"os"

	"github.com/pelletier/go-toml/v2"
	"github.com/rs/zerolog/log"
	"go.sebtobie.de/httpserver"
	"go.sebtobie.de/httpserver/middleware"
	"go.sebtobie.de/httpserver/middleware/db"
)

// Site is an simple type for wrapping sites and their config paths in the absence of an **kwargs equivalent.
type Site struct {
	// Config is the name of the mapitem with the config
	Config string
	// Site is the site itself
	Site httpserver.Site
}

// Server returns a initialized and configured Server.
// custom authentication handlers are not configurable, since the server is preped for startup
// Returns nil on errors and creates the config if the file does not exist, in the later case server and error are nil
// The only middleware that is set up is:
// - db.Middleware
// - middleware.LogMiddleware
func Server(config string, sites ...Site) (s *httpserver.Server, err error) {
	s = httpserver.CreateServer()
	s.Use(middleware.LogMiddleware)
	s.RegisterMiddleware("database", db.NewMiddleware())
	for _, site := range sites {
		s.RegisterSite(site.Config, site.Site)
	}
	var conf *os.File
	if conf, err = os.Open(config); err != nil {
		log.Error().Err(err).Msg("Failed to open the file")
		if os.IsNotExist(err) {
			log.Info().Msg("Creating default config")
			conf, err = os.Create(config)
			if err != nil {
				log.Error().Err(err).Msg("Failed to create the default config")
				return nil, err
			}
			defer conf.Close()
			dec := toml.NewEncoder(conf)
			dec.Encode(s.Conf)
			return nil, nil
		}
		return nil, err
	}
	defer conf.Close()
	dec := toml.NewDecoder(conf)
	dec.Decode(s.Conf)
	s.Setup()
	return
}