package config

import (
	"os"

	"gopkg.in/yaml.v3"
)

var defaultCfg = ServerConfig{
	ServerName: "My Fileserver",
	WebPort:    8080,
	Directories: []DirectoryConfig{
		{
			Id:          "example",
			DisplayName: "Example Directory",
			Path:        "/path/to/directory",
		},
	},
}

// Directory represents a configuration for a directory to be served.
type DirectoryConfig struct {
	Id          string `yaml:"id"`
	DisplayName string `yaml:"display_name"`
	Description string `yaml:"description"`
	Path        string `yaml:"path"`
}

// ServerConfig represents a configuration for the fileserver.
type ServerConfig struct {
	ServerName  string            `yaml:"server_name"`
	WebPort     int               `yaml:"web_port"`
	Directories []DirectoryConfig `yaml:"directories"`
}

// LoadConfig loads configuration from a YAML file.
func LoadConfig(path string) (*ServerConfig, error) {
	data, err := os.ReadFile(path)
	if err != nil {
		return nil, err
	}

	var cfg ServerConfig
	if err := yaml.Unmarshal(data, &cfg); err != nil {
		return nil, err
	}

	return &cfg, nil
}

// WriteExampleConfig writes an example configuration to a YAML file.
func WriteExampleConfig(filepath string) error {
	data, err := yaml.Marshal(&defaultCfg)
	if err != nil {
		return err
	}

	return os.WriteFile(filepath, data, 0644)
}