package steamimmich

import (
	"encoding/json"
	"errors"
	"io"
	"os"
)

type AssetState struct {
	FilePath string
	ImmichID string
}

type LocalState struct {
	Assets []AssetState
}

func loadLocalState(filename string) (*LocalState, error) {
	file, err := os.Open(filename)
	if err != nil {
		if errors.Is(err, os.ErrNotExist) {
			return &LocalState{Assets: []AssetState{}}, nil
		}
		return nil, err
	}

	content, err := io.ReadAll(file)
	if err != nil {
		return nil, err
	}

	var data LocalState
	err = json.Unmarshal(content, &data)
	if err != nil {
		return nil, err
	}

	return &data, nil
}

func saveLocalState(filename string, state LocalState) error {
	content, err := json.Marshal(state)
	if err != nil {
		return err
	}

	return os.WriteFile(filename, content, 0644)
}