package httpserver

import (
	"errors"
	"fmt"
	"log/slog"
	"net/http"

	"bunker/server/internal/application"
	"bunker/server/internal/services/core"
)

var (
	_ = core.HTTPServer(&httpServer{})

	errHTTPServer = errors.New("HTTP server core service")
)

type httpServer struct {
	app     *application.Application
	logger  *slog.Logger
	db      core.Database
	httpSrv *http.Server
}

// Initialize initializes service.
func Initialize(app *application.Application) error {
	httpSrv := &httpServer{
		app: app,
	}

	if err := app.RegisterService(httpSrv); err != nil {
		return fmt.Errorf("%w: %w", errHTTPServer, err)
	}

	return nil
}

func (h *httpServer) Configure() error {
	h.logger.Debug("Configuring service...")

	if err := h.configureHTTPServer(); err != nil {
		return fmt.Errorf("configure: %w", err)
	}

	return nil
}

func (h *httpServer) ConnectDependencies() error {
	databaseRaw := h.app.Service(core.ServiceNameDatabase)
	if databaseRaw == nil {
		return fmt.Errorf("connect dependencies: get database service: %w", application.ErrServiceNotFound)
	}

	database, valid := databaseRaw.(core.Database)
	if !valid {
		return fmt.Errorf("connect dependencies: type assert database service: %w", core.ErrDatabaseIsInvalid)
	}

	h.db = database

	return nil
}

func (h *httpServer) Initialize() error {
	h.logger = h.app.NewLogger("service", core.ServiceNameHTTPServer)

	h.logger.Info("Initializing...")

	return nil
}

func (h *httpServer) Name() string {
	return core.ServiceNameHTTPServer
}

func (h *httpServer) LaunchStartupTasks() error {
	h.logger.Debug("Launching startup tasks...")

	go h.startHTTPServer()

	return nil
}

func (h *httpServer) Shutdown() error {
	if err := h.stopHTTPServer(); err != nil {
		return fmt.Errorf("%w: Shutdown: %w", errHTTPServer, err)
	}

	return nil
}