package cmd

import (
	"context"
	"fmt"
	"log"
	"show-rss/src/cmd/cron"
	"show-rss/src/cmd/server"
	"show-rss/src/pool"
	"time"
)

func Main(ctx context.Context) error {
	ctx, can := context.WithCancel(ctx)
	defer can()

	ctx, can, err := Config(ctx)
	if err != nil {
		return fmt.Errorf("failed to inject: %w", err)
	}
	defer can()

	foos := map[string]func(context.Context) error{
		"server": server.Main,
		"cron":   cron.Main,
	}
	p := pool.New(len(foos))
	defer p.Wait(ctx)

	for k, foo := range foos {
		if err := p.Go(ctx, k, runner(ctx, k, foo)); err != nil {
			return fmt.Errorf("failed to go %s: %v", k, err)
		}
	}

	return p.Wait(ctx)
}

func runner(ctx context.Context, k string, foo func(context.Context) error) func() error {
	return func() error {
		var err error
		for {
			err = foo(ctx)
			if ctx.Err() == nil {
				log.Printf("%s failed; restarting: %v", k, err)
			}
			select {
			case <-ctx.Done():
				break
			case <-time.After(time.Second):
			}
		}
		return err
	}
}