package core

import (
	"context"
	"io"
	"log/slog"
	"time"

	"github.com/EngoEngine/ecs"
)

type Printer struct {
}

type AppConfig struct {
	LogDest  io.Writer
	LogLevel string

	Port string

	TickInterval time.Duration
}

type App struct {
	Config AppConfig
	W      *ecs.World
	L      *slog.Logger
}

func New(ac AppConfig) *App {
	var logLevel slog.Level
	switch ac.LogLevel {
	case "INFO", "info":
		logLevel = slog.LevelInfo
	case "DEBUG", "debug":
		logLevel = slog.LevelDebug
	case "ERROR", "error":
		logLevel = slog.LevelError
	}

	l := slog.New(slog.NewTextHandler(
		ac.LogDest, &slog.HandlerOptions{
			Level: logLevel,
		},
	),
	)

	world := &ecs.World{}

	return &App{
		L:      l,
		W:      world,
		Config: ac,
	}

}

func (a *App) Run(ctx context.Context) {
	go func() {
		t := time.NewTicker(a.Config.TickInterval)
		for range t.C {
			a.W.Update(1)
		}
	}()

	s := NewServer(ctx, a.L, a.Config.Port)
	go s.Start()

	for session := range s.Sessions {
		go session.Start()
	}
}