package main

import (
	"context"
	"log"
	"net/http"

	"gitlab.com/wpetit/goweb/template/html"

	oidc "forge.cadoles.com/wpetit/goweb-oidc"
	"forge.cadoles.com/wpetit/goweb-oidc/internal/config"
	"github.com/gorilla/sessions"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/service"
	"gitlab.com/wpetit/goweb/service/build"
	"gitlab.com/wpetit/goweb/service/session"
	"gitlab.com/wpetit/goweb/service/template"
	"gitlab.com/wpetit/goweb/session/gorilla"
)

func getServiceContainer(conf *config.Config) (*service.Container, error) {
	// Initialize and configure service container
	ctn := service.NewContainer()

	ctn.Provide(build.ServiceName, build.ServiceProvider(ProjectVersion, GitRef, BuildDate))

	// Generate random cookie authentication key if none is set
	if conf.HTTP.CookieAuthenticationKey == "" {
		log.Println("could not find cookie authentication key. generating one...")

		cookieAuthenticationKey, err := gorilla.GenerateRandomBytes(64)
		if err != nil {
			return nil, errors.Wrap(err, "could not generate cookie authentication key")
		}

		conf.HTTP.CookieAuthenticationKey = string(cookieAuthenticationKey)
	}

	// Generate random cookie encryption key if none is set
	if conf.HTTP.CookieEncryptionKey == "" {
		log.Println("could not find cookie encryption key. generating one...")

		cookieEncryptionKey, err := gorilla.GenerateRandomBytes(32)
		if err != nil {
			return nil, errors.Wrap(err, "could not generate cookie encryption key")
		}

		conf.HTTP.CookieEncryptionKey = string(cookieEncryptionKey)
	}

	// Create and initialize HTTP session service provider
	cookieStore := sessions.NewCookieStore(
		[]byte(conf.HTTP.CookieAuthenticationKey),
		[]byte(conf.HTTP.CookieEncryptionKey),
	)

	// Define default cookie options
	cookieStore.Options = &sessions.Options{
		Path:     "/",
		HttpOnly: true,
		MaxAge:   conf.HTTP.CookieMaxAge,
		SameSite: http.SameSiteStrictMode,
	}

	ctn.Provide(
		session.ServiceName,
		gorilla.ServiceProvider("oidc-test", cookieStore),
	)

	// Create and expose template service provider
	ctn.Provide(template.ServiceName, html.ServiceProvider(
		conf.HTTP.TemplateDir,
	))

	// Create and expose config service provider
	ctn.Provide(config.ServiceName, config.ServiceProvider(conf))

	ctx := context.Background()
	provider, err := oidc.NewProvider(ctx, conf.OIDC.IssuerURL)
	if err != nil {
		return nil, errors.Wrap(err, "could not create oidc provider")
	}

	ctn.Provide(oidc.ServiceName, oidc.ServiceProvider(
		oidc.WithCredentials(conf.OIDC.ClientID, conf.OIDC.ClientSecret),
		oidc.WithProvider(provider),
	))

	return ctn, nil
}