package main

import (
	"context"
	"net/http"
	"time"

	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
	httputil "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/http"
	"go.uber.org/zap"
)

type httpComponent struct {
	address     string
	name        string
	handler     http.Handler
	shutdownDur time.Duration
	enabled     bool
	cfg         *cfg
	preReload   func(c *cfg)
}

func (cmp *httpComponent) init(c *cfg) {
	if !cmp.enabled {
		c.log.Info(cmp.name + " is disabled")
		return
	}
	// Init server with parameters
	srv := httputil.New(
		*httputil.NewHTTPSrvPrm(
			cmp.address,
			cmp.handler,
		),
		httputil.WithShutdownTimeout(
			cmp.shutdownDur,
		),
	)
	c.wg.Add(1)
	go func() {
		defer c.wg.Done()

		c.log.Info(logs.FrostFSNodeStartListeningEndpoint,
			zap.String("service", cmp.name),
			zap.String("endpoint", cmp.address))
		fatalOnErr(srv.Serve())
	}()
	c.closers = append(c.closers, closer{
		cmp.name,
		func() { stopAndLog(c, cmp.name, srv.Shutdown) },
	})
}

func (cmp *httpComponent) reload(ctx context.Context) error {
	if cmp.preReload != nil {
		cmp.preReload(cmp.cfg)
	}
	// Shutdown server
	closer := getCloser(cmp.cfg, cmp.name)
	if closer != nil {
		closer.fn()
	}
	// Cleanup
	delCloser(cmp.cfg, cmp.name)
	// Init server with new parameters
	cmp.init(cmp.cfg)
	// Start worker
	if cmp.enabled {
		startWorker(ctx, cmp.cfg, *getWorker(cmp.cfg, cmp.name))
	}
	return nil
}