package main

import (
	"encoding/gob"
	"fmt"
	"log"
	"os"
	"path"
	"sync"

	"git.ophivana.moe/cat/rpcfetch"
)

var (
	conf     *config
	confLock = &sync.RWMutex{}
)

type config struct {
	ID       string
	Activity *rpcfetch.Activity
}

func (c *config) write(v config) {
	confLock.Lock()
	*c = v
	confLock.Unlock()
}

func save() {
	nf, err := os.CreateTemp(path.Dir(confPath), ".rpcfetch.conf.*")
	if err != nil {
		log.Fatalf("error creating temporary configuration file: %s", err)
	}

	confLock.RLock()
	if err = gob.NewEncoder(nf).Encode(defaultConfig); err != nil {
		fmt.Printf("error writing configuration file: %s\n", err)
		os.Exit(1)
	}
	confLock.RUnlock()

	if err = nf.Close(); err != nil {
		log.Fatalf("error closing temporary configuration file: %s", err)
	}

	if err = os.Rename(nf.Name(), confPath); err != nil {
		log.Fatalf("error renaming configuration file: %s", err)
	}
	log.Printf("saved configuration to %s", confPath)
}

// sample config so the program works out of the box
var defaultConfig = config{
	ID: "1252927154480611351",
	Activity: &rpcfetch.Activity{
		State:      "%used / %total",
		Details:    "%1min %5min %15min",
		Timestamps: &rpcfetch.ActivityTimestamps{Start: &launchTime},
		Assets: &rpcfetch.ActivityAssets{
			LargeImage: "yorha",
			LargeText:  "%hostname",
			SmallImage: "flan",
			SmallText:  "PID: %pid",
		},
	},
}