package config

import (
	"fmt"
	"os"
	"path/filepath"

	"github.com/spf13/cobra"
)

// Config holds the application configuration
type Config struct {
	DataDir string
	Port    int
	Host    string
}

// NewConfig creates a new config with default values
func NewConfig() *Config {
	return &Config{
		DataDir: "./data",
		Port:    8080,
		Host:    "127.0.0.1",
	}
}

// AddFlags adds the CLI flags to the command
func (c *Config) AddFlags(cmd *cobra.Command) {
	cmd.PersistentFlags().StringVar(&c.DataDir, "data-dir", c.DataDir, "Storage path for markdown files")
	cmd.PersistentFlags().IntVar(&c.Port, "port", c.Port, "Server port")
	cmd.PersistentFlags().StringVar(&c.Host, "host", c.Host, "Bind address")
}

// Validate validates the configuration
func (c *Config) Validate() error {
	if c.Port < 1 || c.Port > 65535 {
		return fmt.Errorf("invalid port: %d", c.Port)
	}
	return nil
}

// DataDirPath returns the absolute path to the data directory
func (c *Config) DataDirPath() string {
	absPath, err := filepath.Abs(c.DataDir)
	if err != nil {
		return c.DataDir
	}
	return absPath
}

// EnsureDataDir ensures the data directory exists
func (c *Config) EnsureDataDir() error {
	return os.MkdirAll(c.DataDirPath(), 0755)
}