package storage

import (
	"os"
	"path/filepath"

	"gopkg.in/yaml.v3"
)

// Config holds persistent user preferences stored in .greq/config.yaml.
type Config struct {
	Editor string `yaml:"editor,omitempty"` // e.g. "nvim", "nano", "code --wait"
}

var configPath = filepath.Join(RootDir, "config.yaml")

// LoadConfig reads .greq/config.yaml. Missing file returns an empty Config.
func LoadConfig() (Config, error) {
	var cfg Config
	data, err := os.ReadFile(configPath)
	if err != nil {
		if os.IsNotExist(err) {
			return cfg, nil
		}
		return cfg, err
	}
	return cfg, yaml.Unmarshal(data, &cfg)
}

// SaveConfig writes cfg to .greq/config.yaml.
func SaveConfig(cfg Config) error {
	_ = os.MkdirAll(RootDir, 0o755)
	data, err := yaml.Marshal(&cfg)
	if err != nil {
		return err
	}
	return os.WriteFile(configPath, data, 0o644)
}