package web

import (
	"net/http"

	"github.com/google/uuid"

	"code.nochebuena.dev/einherjar/contracts/logging"
	"code.nochebuena.dev/einherjar/web/mw"
	"code.nochebuena.dev/einherjar/web/server"
)

// Config aggregates configuration for the web module.
// Server holds HTTP server settings; all fields carry caarlos0/env struct tags.
// AllowedOrigins is programmatic-only — set it directly or via the env tag.
type Config struct {
	Server         server.Config
	AllowedOrigins []string `env:"EINHERJAR_SERVER_CORS_ORIGINS" envSeparator:","`
}

// New creates a [server.Server] with the recommended middleware stack pre-applied:
//  1. Recover — catches panics, returns 500
//  2. RequestID — injects UUID v7 request ID (falls back to v4)
//  3. RequestLogger — logs method, path, status, latency
//  4. CORS — applied only when cfg.AllowedOrigins is non-empty
//
// For full control over middleware composition use [server.New] directly.
func New(logger logging.Logger, cfg ...Config) server.Server {
	var c Config
	if len(cfg) > 0 {
		c = cfg[0]
	}

	middleware := []func(http.Handler) http.Handler{
		mw.Recover(logger),
		mw.RequestID(newRequestID),
		mw.RequestLogger(logger),
	}
	if len(c.AllowedOrigins) > 0 {
		middleware = append(middleware, mw.CORS(c.AllowedOrigins))
	}

	return server.New(logger, c.Server, server.WithMiddleware(middleware...))
}

func newRequestID() string {
	id, err := uuid.NewV7()
	if err != nil {
		return uuid.NewString()
	}
	return id.String()
}