package game

import (
	"context"
	"encoding/json"

	"github.com/heroiclabs/nakama-common/runtime"
)

type MovePayload struct {
	Data map[string]interface{} `json:"data"` // arbitrary structure per game
}

// GameRules defines game-specific mechanics.
// You implement this for TicTacToe, Chess, etc.
type GameRules interface {
	MaxPlayers() int

	// ApplyMove modifies state, returns (stateChanged, gameOver, winnerIndex)
	ApplyMove(state *MatchState, playerIdx int, payload MovePayload) (bool, bool, int)

	// Called when match starts and players are set.
	AssignPlayerSymbols(players []*Player)

	// Called when match ends via forfeit.
	ForfeitWinner(state *MatchState, leaverIndex int) int
}