package main

import (
	"context"
	"crypto/tls"
	"net/http"

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

	oidc "forge.cadoles.com/cadoles/goweb-oidc"
	"forge.cadoles.com/cadoles/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(ctx context.Context, conf *config.Config) (*service.Container, error) {
	// Initialize and configure service container
	ctn := service.NewContainer()

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

	keyPairs := make([][]byte, 0)

	// Generate random cookie authentication key if none is set
	if conf.HTTP.CookieAuthenticationKey == "" {
		logger.Info(ctx, "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)
	}

	keyPairs = append(keyPairs, []byte(conf.HTTP.CookieAuthenticationKey))

	// Use cookie encryption key if set
	if conf.HTTP.CookieEncryptionKey != "" {
		keyPairs = append(keyPairs, []byte(conf.HTTP.CookieEncryptionKey))
	}

	// Create and initialize HTTP session service provider
	cookieStore := sessions.NewCookieStore(keyPairs...)

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

	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))

	defaultHTTPTransport, ok := http.DefaultTransport.(*http.Transport)
	if ok {
		if defaultHTTPTransport.TLSClientConfig == nil {
			defaultHTTPTransport.TLSClientConfig = &tls.Config{}
		}

		defaultHTTPTransport.TLSClientConfig.InsecureSkipVerify = conf.OIDC.InsecureSkipVerify
	} else {
		logger.Fatal(
			ctx,
			"could not configure default http client",
		)
	}

	provider, err := oidc.NewProvider(ctx, conf.OIDC.IssuerURL, conf.OIDC.SkipIssuerVerification)
	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),
		oidc.WithScopes(conf.OIDC.Scopes...),
		oidc.WithAcrValues(conf.OIDC.AcrValues),
		oidc.WithSkipIssuerCheck(conf.OIDC.SkipIssuerVerification),
	))

	return ctn, nil
}