package core

import (
	"context"
	"encoding/json"
	"log"
	"time"

	"gitea.mrixs.me/minecraft-platform/backend/internal/database"
	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
	"github.com/Tnze/go-mc/bot/basic"
	"github.com/Tnze/go-mc/net"
)

type ServerPoller struct {
	Repo *database.ServerRepository
}

func (p *ServerPoller) Start(ctx context.Context) {
	log.Println("Starting server poller...")
	ticker := time.NewTicker(60 * time.Second)
	defer ticker.Stop()

	p.pollAllServers(ctx)

	for {
		select {
		case <-ticker.C:
			p.pollAllServers(ctx)
		case <-ctx.Done():
			log.Println("Stopping server poller...")
			return
		}
	}
}

func (p *ServerPoller) pollAllServers(ctx context.Context) {
	servers, err := p.Repo.GetAllEnabledServers(ctx)
	if err != nil {
		log.Printf("Poller: failed to get servers: %v", err)
		return
	}

	for _, s := range servers {
		go p.pollServer(ctx, s)
	}
}

func (p *ServerPoller) pollServer(ctx context.Context, server *models.GameServer) {
	resp, delay, err := net.PingAndListTimeout(server.Address, 5*time.Second)
	if err != nil {
		log.Printf("Poller: failed to ping %s (%s): %v", server.Name, server.Address, err)
		return
	}

	var status basic.ServerList
	if err := json.Unmarshal(resp, &status); err != nil {
		log.Printf("Poller: failed to unmarshal status for %s: %v", server.Name, err)
		return
	}

	// MOTD может быть сложным объектом, извлекаем текст
	var motdText string
	if s, ok := status.Description.(string); ok {
		motdText = s
	} else {
		if m, ok := status.Description.(map[string]interface{}); ok {
			if t, ok := m["text"].(string); ok {
				motdText = t
			}
		}
	}

	updateData := &models.ServerStatus{
		StatusJSON:  string(resp),
		Motd:        motdText,
		PlayerCount: status.Players.Online,
		MaxPlayers:  status.Players.Max,
		VersionName: status.Version.Name,
		Ping:        delay.Milliseconds(),
	}

	if err := p.Repo.UpdateServerStatus(ctx, server.ID, updateData); err != nil {
		log.Printf("Poller: failed to update status for %s: %v", server.Name, err)
	} else {
		log.Printf("Poller: successfully polled %s", server.Name)
	}
}