package infinitecraft

import (
	"compress/gzip"
	"context"
	"encoding/json"
	"fmt"
	"os"
	"time"
)

func (m *Merger) Write(ctx context.Context, g Game) (out string, err error) {
	base := fmt.Sprintf("%s - %s", time.Now().Local().Format("2006-01-02T15_04_05"), g.Name)
	out = base + ".ic"

	var f *os.File
	if f, err = os.Create(out); err != nil {
		return
	}
	defer f.Close()

	gz := gzip.NewWriter(f)
	defer gz.Close()
	gz.Name = base
	gz.ModTime = time.Unix(g.Updated/1000, g.Updated%1000)
	gz.Comment = "merge by ic-merge"

	if g.Instances == nil {
		g.Instances = make([]any, 0)
	}

	enc := json.NewEncoder(gz)
	err = enc.Encode(g)
	return
}