package api

import (
	"RenewCMS/api/handlers/article"
	"RenewCMS/api/handlers/auth"
	"RenewCMS/api/handlers/frontend"
	"RenewCMS/api/handlers/media"
	"RenewCMS/api/handlers/settings"
	"RenewCMS/api/handlers/staticimages"
	"RenewCMS/api/handlers/user"
	"RenewCMS/api/middleware"
	"RenewCMS/internal/infrastructure/config"
	"encoding/json"
	"net/http"

	"github.com/MadAppGang/httplog"
	"github.com/go-chi/chi/v5"
	chimiddleware "github.com/go-chi/chi/v5/middleware"
	"github.com/go-chi/cors"
	"github.com/go-chi/jwtauth/v5"
)

func enableLoggingIfDev(r *chi.Mux, routerName string, environment string) {
	if environment == "development" {
		r.Use(httplog.LoggerWithName(routerName))
	}
}

func GetHelloWorld(w http.ResponseWriter, _ *http.Request) {
	msg, _ := json.Marshal(map[string]string{"message": "Hello World"})
	_, _ = w.Write(msg)
}

func NewArticleRouter(container *UseCases) http.Handler {
	r := chi.NewRouter()

	articleHandler := article.NewHandler(container.CreateArticleUseCase, container.GetArticleUseCase, container.ListArticlesUseCase, container.DeleteArticleUseCase, container.UpdateArticleUseCase, container.GetUserUseCase)

	r.Group(func(r chi.Router) {
		r.Get("/", articleHandler.ListArticles)
		r.Get("/{id}", articleHandler.GetArticle)
	})
	r.Group(func(r chi.Router) {
		r.Use(jwtauth.Authenticator(container.Token))
		r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
		r.Use(middleware.RequireVerifiedUser(container.GetUserUseCase))
		r.Post("/", articleHandler.PostArticle)
		r.Delete("/{id}", articleHandler.DeleteArticle)
		r.Patch("/{id}", articleHandler.UpdateArticleBody)
		r.Patch("/{id}/publish", articleHandler.PublishArticle)
		r.Patch("/{id}/unpublish", articleHandler.UnpublishArticle)
	})
	return r
}

func NewAuthRouter(container *UseCases, isProduction bool, rateLimit config.AuthRateLimitSettings, trustedProxies []string) http.Handler {
	r := chi.NewRouter()

	loginHandler := auth.NewLoginHandler(container.Token, container.CreateUserUseCase, container.AuthenticateUserUseCase, isProduction)
	verificationHandler := auth.NewVerificationHandler(container.VerifyUserUseCase, container.CancelRegistrationUseCase, isProduction)
	meHandler := auth.NewMeHandler(container.GetUserUseCase)
	passwordResetHandler := auth.NewPasswordResetHandler(container.RequestPasswordResetUseCase, container.ResetPasswordUseCase)
	acceptInviteHandler := auth.NewAcceptInviteHandler(container.GetInviteUseCase, container.AcceptInviteUseCase, container.Token, isProduction)

	r.Post("/register", loginHandler.Register)
	r.Get("/registration", loginHandler.RegistrationStatus)
	r.Group(func(r chi.Router) {
		r.Use(middleware.TrustedProxyRealIP(trustedProxies))
		r.Use(middleware.NewRateLimiter(rateLimit.MaxAttempts, rateLimit.Window))
		r.Post("/login", loginHandler.Login)
	})
	r.Post("/logout", loginHandler.Logout)
	r.Group(func(r chi.Router) {
		r.Use(middleware.TrustedProxyRealIP(trustedProxies))
		r.Use(middleware.NewRateLimiter(rateLimit.MaxAttempts, rateLimit.Window))
		r.Post("/password-reset", passwordResetHandler.RequestPasswordReset)
	})
	r.Post("/password-reset/confirm", passwordResetHandler.ResetPassword)
	r.Group(func(r chi.Router) {
		r.Use(middleware.TrustedProxyRealIP(trustedProxies))
		r.Use(middleware.NewRateLimiter(rateLimit.MaxAttempts, rateLimit.Window))
		r.Get("/invite", acceptInviteHandler.GetInvite)
		r.Post("/invite/accept", acceptInviteHandler.AcceptInvite)
	})
	r.Group(func(r chi.Router) {
		r.Use(jwtauth.Verifier(container.Token))
		r.Use(jwtauth.Authenticator(container.Token))
		r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
		r.Post("/verify", verificationHandler.Verify)
		r.Delete("/register", verificationHandler.CancelRegistration)
		r.Get("/me", meHandler.Me)
	})
	return r
}

func NewUserRouter(container *UseCases, rateLimit config.AuthRateLimitSettings, trustedProxies []string) http.Handler {
	r := chi.NewRouter()

	userHandler := user.NewHandler(container.UpdateUserProfileUseCase)
	inviteHandler := user.NewInviteHandler(container.CreateInviteUseCase, container.CancelInviteUseCase, container.RenewInviteUseCase, container.ListUsersAndInvitesUseCase)

	r.Use(jwtauth.Verifier(container.Token))
	r.Use(jwtauth.Authenticator(container.Token))
	r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
	r.Use(middleware.RequireVerifiedUser(container.GetUserUseCase))
	r.Patch("/me", userHandler.UpdateMe)
	r.Get("/", inviteHandler.ListUsers)
	r.Group(func(r chi.Router) {
		r.Use(middleware.RequireOwner(container.GetUserUseCase))
		r.Use(middleware.TrustedProxyRealIP(trustedProxies))
		r.Use(middleware.NewRateLimiter(rateLimit.MaxAttempts, rateLimit.Window))
		r.Post("/invite", inviteHandler.CreateInvite)
		r.Delete("/invite/{id}", inviteHandler.CancelInvite)
		r.Post("/invite/{id}/renew", inviteHandler.RenewInvite)
	})
	return r
}

func NewSettingsRouter(container *UseCases) http.Handler {
	r := chi.NewRouter()

	settingsHandler := settings.NewHandler(container.GetSettingsUseCase)

	r.Use(jwtauth.Verifier(container.Token))
	r.Use(jwtauth.Authenticator(container.Token))
	r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
	r.Use(middleware.RequireVerifiedUser(container.GetUserUseCase))
	r.Get("/", settingsHandler.GetSettings)
	return r
}

func NewMediaRouter(container *UseCases) http.Handler {
	r := chi.NewRouter()

	mediaHandler := media.NewHandler(container.CreateImageUseCase, container.ListMediaUseCase, container.RenameMediaUseCase, container.DeleteMediaUseCase, container.MergeMediaUseCase, container.GetMediaUsageUseCase)

	r.Use(jwtauth.Verifier(container.Token))
	r.Use(jwtauth.Authenticator(container.Token))
	r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
	r.Use(middleware.RequireVerifiedUser(container.GetUserUseCase))
	r.Get("/", mediaHandler.List)
	r.Post("/", mediaHandler.Upload)
	r.Post("/merge", mediaHandler.Merge)
	r.Patch("/{id}", mediaHandler.Rename)
	r.Delete("/{id}", mediaHandler.Delete)
	r.Get("/{id}/usage", mediaHandler.Usage)
	return r
}

func InitBackendRoutes(container *UseCases, settings config.Settings) *chi.Mux {
	r := chi.NewRouter()

	enableLoggingIfDev(r, "backend", settings.Environment)

	r.Use(chimiddleware.GetHead)
	r.Use(middleware.JsonContentTypeMiddleware)
	r.Get("/", GetHelloWorld)
	r.Group(func(r chi.Router) {
		r.Use(jwtauth.Verifier(container.Token))
		r.Mount("/article", NewArticleRouter(container))
	})
	r.Mount("/user", NewUserRouter(container, settings.AuthRateLimit, settings.TrustedProxies))
	r.Mount("/settings", NewSettingsRouter(container))
	r.Mount("/media", NewMediaRouter(container))
	r.Mount("/auth", NewAuthRouter(container, settings.IsProduction(), settings.AuthRateLimit, settings.TrustedProxies))

	return r
}

func InitFrontendRoutes(environment string) *chi.Mux {
	r := chi.NewRouter()

	enableLoggingIfDev(r, "frontend", environment)

	r.Mount("/", frontend.NewFrontendRouter())

	return r
}

func GetHealth(w http.ResponseWriter, _ *http.Request) {
	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
	_, _ = w.Write([]byte("ok"))
}

func enableCorsIfConfigured(r *chi.Mux, origins []string) {
	if len(origins) == 0 {
		return
	}
	r.Use(cors.Handler(cors.Options{
		AllowedOrigins:   origins,
		AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
		AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type", "X-CSRF-Token"},
		ExposedHeaders:   []string{"Link"},
		AllowCredentials: false,
		MaxAge:           300,
	}))
}

func InitRoutes(container *UseCases, settings config.Settings) *chi.Mux {
	backend := InitBackendRoutes(container, settings)
	frontend := InitFrontendRoutes(settings.Environment)

	apiRouter := chi.NewRouter()
	enableCorsIfConfigured(apiRouter, settings.CorsAllowedOrigins)
	apiRouter.Use(chimiddleware.GetHead)
	apiRouter.Get("/healthz", GetHealth)
	apiRouter.Mount("/v1", backend)
	apiRouter.Mount("/static/uploadedImages", staticimages.NewHandler(settings.UploadDir))
	apiRouter.Mount("/", frontend)

	return apiRouter
}