package main

import (
	"encoding/json"
	"os"
	"sync"
)

const (
	FILE_CONFIG string = "./config.json"
)

type Config struct {
	CfgJson
	sync.Mutex
}

type CfgJson struct {
	Album CfgAlbum `json:"album,omitempty"`
}

type CfgAlbum struct {
	Folder  []AlbumFolder          `json:"folder,omitempty"`
	Virtual map[string]interface{} `json:"virtual,omitempty"`
}

type AlbumFolder struct {
	Name string `json:"name,omitempty"`
	Path string `json:"path"`
}

func (my *Config) Init() *Config {
	my.Read()
	return my
}

func (my *Config) Read() (*CfgJson, error) {
	b, err := os.ReadFile(FILE_CONFIG)
	if err != nil {
		return nil, err
	}
	my.Mutex.Lock()
	err = json.Unmarshal(b, &my.CfgJson)
	my.Mutex.Unlock()
	if err != nil {
		return nil, err
	}
	return &my.CfgJson, nil
}

func (my *Config) Write(cfg *CfgJson) error {
	if cfg != nil {
		my.Mutex.Lock()
		my.CfgJson = *cfg
	} else {
		my.Mutex.Lock()
	}
	b, err := json.Marshal(&my.CfgJson)
	my.Mutex.Unlock()

	if err != nil {
		return err
	}
	return os.WriteFile(FILE_CONFIG, b, 0644)
}