package servecmd

import (
	"context"
	"flag"
	"fmt"
	"log/slog"

	"git.maronato.dev/maronato/goshort/cmd/shared"
	"git.maronato.dev/maronato/goshort/docs"
	"git.maronato.dev/maronato/goshort/frontend"
	"git.maronato.dev/maronato/goshort/internal/config"
	"git.maronato.dev/maronato/goshort/internal/server"
	apiserver "git.maronato.dev/maronato/goshort/internal/server/api"
	healthcheckserver "git.maronato.dev/maronato/goshort/internal/server/healthcheck"
	authmiddleware "git.maronato.dev/maronato/goshort/internal/server/middleware/auth"
	oidcserver "git.maronato.dev/maronato/goshort/internal/server/oidc"
	shortserver "git.maronato.dev/maronato/goshort/internal/server/short"
	staticssterver "git.maronato.dev/maronato/goshort/internal/server/static"
	configservice "git.maronato.dev/maronato/goshort/internal/service/config"
	oidcservice "git.maronato.dev/maronato/goshort/internal/service/oidc"
	shortservice "git.maronato.dev/maronato/goshort/internal/service/short"
	shortlogservice "git.maronato.dev/maronato/goshort/internal/service/shortlog"
	tokenservice "git.maronato.dev/maronato/goshort/internal/service/token"
	userservice "git.maronato.dev/maronato/goshort/internal/service/user"
	handlerutils "git.maronato.dev/maronato/goshort/internal/util/handler"
	"git.maronato.dev/maronato/goshort/internal/util/logging"
	"github.com/go-chi/chi/v5"
	"github.com/peterbourgon/ff/v3/ffcli"
)

func New(cfg *config.Config) *ffcli.Command {
	// Create the flagset and register the flags.
	fs := flag.NewFlagSet("goshort serve", flag.ContinueOnError)

	shared.RegisterBaseFlags(fs, cfg)
	shared.RegisterServerFlags(fs, cfg)
	fs.BoolVar(&cfg.Prod, "prod", config.DefaultProd, "run in production mode")

	// Create the command and options
	cmd := shared.NewCommand(cfg, exec)
	opts := shared.NewSharedCmdOptions()

	// Return the ffcli command.
	return &ffcli.Command{
		Name:       "serve",
		ShortUsage: "goshort serve [flags]",
		ShortHelp:  "Start the API server with embedded frontend",
		FlagSet:    fs,
		Exec:       cmd.Exec,
		Options:    opts,
	}
}

func exec(ctx context.Context, cfg *config.Config) error {
	l := logging.FromCtx(ctx)
	l.Debug("Executing serve command", slog.Any("config", cfg))

	// Create the new server
	srv := server.NewServer(cfg)

	// Create services
	storage := shared.InitStorage(ctx, cfg)

	err := storage.Start(ctx)
	if err != nil {
		return fmt.Errorf("failed to start storage, %w", err)
	}

	defer func() {
		err := storage.Stop(ctx)
		if err != nil {
			l.Error("failed to stop storage", "error", err)
		}
	}()

	shortService := shortservice.NewShortService(storage)
	userService := userservice.NewUserService(cfg, storage)
	tokenService := tokenservice.NewTokenService(storage)
	shortLogService := shortlogservice.NewShortLogService(storage)
	oidcService := oidcservice.NewOIDCService(ctx, cfg)
	configService := configservice.NewConfigService(cfg)

	// Start short log worker
	stopWorker, _ := shortLogService.StartWorker(ctx)
	defer stopWorker()

	// Create handlers
	apiHandler := apiserver.NewAPIHandler(shortService, userService, tokenService, shortLogService, configService)
	shortHandler := shortserver.NewShortHandler(shortService, shortLogService)
	staticHandler := staticssterver.NewStaticHandler(cfg, "/", frontend.Assets())
	healthcheckHandler := healthcheckserver.NewHealthcheckHandler(storage)
	docsHandler := staticssterver.NewStaticHandler(cfg, "/api/docs", docs.Assets())
	oidcHandler := oidcserver.NewOIDCHandler(cfg, oidcService, userService)

	// Create routers
	apiRouter := apiserver.NewAPIRouter(apiHandler)
	shortRouter := shortserver.NewShortRouter(shortHandler)
	staticRouter := staticssterver.NewStaticRouter(staticHandler)
	healthcheckRouter := healthcheckserver.NewHealthcheckRouter(healthcheckHandler)
	docsRouter := staticssterver.NewStaticRouter(docsHandler)
	oidcRouter := oidcserver.NewOIDCRouter(oidcHandler)

	// Create the root URL handler by chaining short and static routers
	chainedRouter := handlerutils.NewChainedHandler(shortRouter, staticRouter)

	// Configure app routes
	srv.Mux.Route("/api", func(r chi.Router) {
		r.Use(authmiddleware.Auth(userService, tokenService))
		r.Mount("/", apiRouter)
		r.Mount("/docs", docsRouter)
	})
	// Register OIDC routes if the service is enabled
	if oidcService != nil {
		srv.Mux.Mount("/odc", oidcRouter)
	}

	srv.Mux.Mount("/healthz", healthcheckRouter)
	srv.Mux.Mount("/", chainedRouter)

	if err := srv.ListenAndServe(ctx); err != nil {
		return fmt.Errorf("rrror during server execution, %w", err)
	}

	return nil
}